boosted spec v

[Big J]

Well the time has come. 90% of the parts have been ordered.

[ChainSaw]

what? 90%?!?!?!!?!? 110% ALL DAY EVERYDAY!!!! RRRRAAAAAAAHHHHHH!H!!!!!!!!!

[Outphase]

I myself prefer 300%. Merchant style.

[Big J]

well......75% of you can kiss my ass, 22% can die in a fire, and the other 3% of the people who post in the nissan section of IA, who aren't total fuck sticks, are allright.

[MachNU]

well......75% of you can kiss my ass, 22% can die in a fire, and the other 3% of the people who post in the nissan section of IA, who aren't total fuck sticks, are allright.

YAY I made the 3% :lmfao: :lmfao: :lmfao: :gay:

[Big J]

More and more parts keep showing up :D

[91DSM]

Nice what kind of turbo?

[Big J]

T/3 T/4, .63 A/R turbine, .50 A/R compressor housing, 57 trim

[Firefightin_tC]

Justin, you know I got dibs on the first joy ride!

[~The_Duke~]

Let us know kind of power it puts down on a dyno plz :D and the final about on the price tag :goodjob:

[Big J]

Justin, you know I got dibs on the first joy ride!

Anytime, maybe not the first ride, but one of the first. I'm aiming for Halloween to be finished.

Oh, and my goal was to boost it for less than a grand, I should have about $100 left over. :taun: It'll take another $600-$750 (injectors, FPR, clutch, screen for data logger, and 3.5 BAR MAP sensor for data logger) to put down the power I want, just a touch over 300 WHP and about 280-290 TQ at about 10-11.5 PSI. 5 PSI should net me about 230-250WHP, I'll have to live with that for a minute. :cry:

[~The_Duke~]

Anytime, maybe not the first ride, but one of the first. I'm aiming for Halloween to be finished.

Oh, and my goal was to boost it for less than a grand, I should have about $100 left over. :taun: It'll take another $600-$750 (injectors, FPR, clutch, screen for data logger, and 3.5 BAR MAP sensor for data logger) to put down the power I want, just a touch over 300 WHP and about 280-290 TQ at about 10-11.5 PSI. 5 PSI should net me about 230-250WHP, I'll have to live with that for a minute. :cry:

not to bad at all...that thing is going to be quick as hell...fun stuff...

[Big J]

Naw, it'll still be a sentra..........................

[fox]

What kind of downpipe are you using?

[liquid_spec1]

man~
you gonna have a blast.
i used own a 03 spec v,
.50 trim.
10psi 289hwp and 296 wtq.
have fun

[Big J]

What kind of downpipe are you using?

I'm going to fabricate it, 3" steel, why you want one? Screw paying $650 for the only production piece you can get outside of one of the 3 kits made.

[fox]

I'm going to fabricate it, 3" steel, why you want one? Screw paying $650 for the only production piece you can get outside of one of the 3 kits made.

Possibly. I was considering piecing together a kit a year or so ago, and I couldn't get my hands on the DP. Now I'm in limbo with boost and the VQ.

[Big J]

I had worked out the major details on a blower setup, Eaton M-62, mounted hotside, and intercooled, this just ended up being cheaper. If I can make some money doing QR/SE-R spesific turbo parts, I'll end up doing the S/C eventually. <-------I'm pretty sure the S/C would be a monster, have better traction than a turbo, and put down some awsome times and numbers........................ :(

[Big J]

Just rounding up the last parts, should be done by halloween, still under budget.

[Big J]

twiddling thumbs.............

[~The_Duke~]

I'd like to see this project when you are done with it, you come out to BP or anything like that...

[fox]

I think he makes it out to the V. But he doesn't make the BP meets. I don't know Big J, but I actually asked him the same question on another forum for the same reasons.

[Dirty Octopus™]

where the pics at?

BRB, The Weeping Willow :yes:

[MachNU]

Big J once you get this boosted...i want to run you at commerce...once i get mine done though!!!! ;) 2.5 Boosted vs 2.0 Boosted!!!!!!

[N/A EK]

Big J once you get this boosted...i want to run you at commerce...once i get mine done though!!!! ;) 2.5 Boosted vs 2.0 Boosted!!!!!!

Ok, Than Ill run both of ya'll w/ a VQ35 swap +(75sht) N2O:D

[deffro]

Then i'll run all of you in an Outlander. I hear they are pretty fast.

[HeLLo iM iZzY]

Where the pics at?

[N/A EK]

Where the pics at?

x2

[Big J]

Of what, a pile of parts? I don't start fabrication untill the 28th, I should be done Sunday the 29th. Expect lots of pictures then.

[N/A EK]

So you gonna ge done everything in 1 day?:thinking: ...g/l

[MachNU]

well shit that will be long before i get mine done...i dotn plan on being done till around feb. or march!

[Big J]

The day of the 28th and the day of the 29th, thats 16+ hours. I turn wrenches, do exhaust, and fix cars all day, this is a cake walk. The shop is closed on the weekends, so I do stuff there. I know everything I have to do, have access to a shop, exhaust machine, all my tools, air compressors, welders, and emissions dyno with gas analyser(I can load the motor to tune it, and i have a wideband 7 channel datalogger in my car if I want to tune it on the street). I've got it covered.

[N/A EK]

The day of the 28th and the day of the 29th, thats 16+ hours. I turn wrenches, do exhaust, and fix cars all day, this is a cake walk. The shop is closed on the weekends, so I do stuff there. I know everything I have to do, have access to a shop, exhaust machine, all my tools, air compressors, welders, and emissions dyno with gas analyser(I can load the motor to tune it, and i have a wideband 7 channel datalogger in my car if I want to tune it on the street). I've got it covered.

Sounds good can't wait to see it.:goodjob:

[MR. 200SX]

Looks nice I hope that you did rebuild your internals. Later, JG.

[Big J]

They're good for 300-330whp

[bdydrpdmazda]

I thought about boosting my Spec V but I decided to give it to my wife with all the bolt ons and build a truck, hearing you guys talk about boosting yours makes me wanna reconsidder.

[N/A EK]

I thought about boosting my Spec V but I decided to give it to my wife with all the bolt ons and build a truck, hearing you guys talk about boosting yours makes me wanna reconsidder.

Boosted it:goodjob:

[bdydrpdmazda]

I have alot of miles on mine, it was another factor in not boosting it, it has 120,000+ on it, still runs great but forced induction with that many miles worries me.

[~The_Duke~]

I think I am just going to make mine a cornering monster...maybe put a CAI or short ram or something in there...

[Georgia_boy]

Justin, that shit is gonna fly!!!!!!!
can't wait to see it man, only a few more days.

[Big J]

The manifold came in today. It's a very nice piece. All the flanges are machined, the outside runners have a thick triangler cross section cast in as a support structure. The ports are gasket matched. It's hard to guess the volume of the manifold, but I would say it's simular if not smaller than a weld el manifold, the angles of the bends are smooth and should flow well. It should spool quickly and support very good power output. The wastegate placement is ideal, the opening inside the manifold leading to the wastegate could benifit from a little smoothing and contouring, but will work fine as it is. It's well thought out, designed, and manufactured top notch, I seriously doubt there will be any fitment issues. I'm still going to wait untill after I install mine to set up the group buy. I'm putting it on the weekend before halloween, so not too much longer guys. I'm very excited to see new products for the QR that are of this quality and such a good value.

I promise I'll have pictures soon.

[Big J]

Justin, that shit is gonna fly!!!!!!!
can't wait to see it man, only a few more days.

I'm only going to be running off of a 3.63PSI wastegate spring untill I get injectors and a 3.5bar map sensor to convert my SACF to correct for boost. Naw, it won't be fast it's a sentra :D

[fox]

The wastegate, atmospheric or recirc.?

[Big J]

I really want recirc, the noise isn't worth the extra 5hp. It just depends on how much room I have to work with to get good placment.

[MachNU]

how much boost you planning on running?

[Big J]

max of 10-11.5, which is good for about 300whp/wtq.

[bdydrpdmazda]

I hope were gonna see lots of pics of the build up and finished product. NISSAN FTW!!!

[MachNU]

max of 10-11.5, which is good for about 300whp/wtq.

good because i was going to say...you sound like your going farther than i am...but i am also shooting for around 300whp

[Big J]

good because i was going to say...you sound like your going farther than i am...but i am also shooting for around 300whp

That's great, and this is important why?

[MachNU]

That's great, and this is important why?

oh well fuck you to :D :rolleyes: ...becuase i wanted to race you once i get mine boosted...see whats better a 2.5l vs. a 2.0l

[Big J]

I've been driving since you were in grade school. Gearing is going to play the biggest roll.

[MachNU]

I've been driving since you were in grade school. Gearing is going to play the biggest roll.

lol...i am just saying i am curious a to what a new model spec vs a 01 se can do when both boosted....:dunno:

[N/A EK]

lol...i am just saying i am curious a to what a new model spec vs a 01 se can do when both boosted....:dunno:

How about me and you do a run?

[MachNU]

How about me and you do a run?

now...??? Shit with my 18's it would help you alot!

[Big J]

I need a couple of 2.5" 45* aluminum intercooler pipes, anyone know where I can get some locally?

[N/A EK]

now...??? Shit with my 18's it would help you alot!

Ohh come'on , Ill give you a car lenght:goodjob:

[VTECin5th]

Any Internals

[Big J]

Not yet, too poor at the moment. If anything I'd swap in the 02' maxima final drive gears.

[MachNU]

Are you still boosting the Sentra or did you sell it? I saw in the All Motor Section that you said you sold the Spec? Or are you talking about another vechicle!?!?!?!?!

[Big J]

It's at the shop now, I finished most of it today.

[Big J]

http://i35.photobucket.com/albums/d157/big_j_1979/turbo001.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo002.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo005.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo009.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo008.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo004.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo020.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo013.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo014.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo018.jpg

[Big J]

UPS is retarded and forgot to put my oil lines on a truck for delivery so I didn't get them Friday. I should be done by tuesday, not on schedual, but good enough, I've never done this before.

[Big J]

Nissan Sentras are so gay.

[MachNU]

Nissan Sentras are so gay.

LOL....still think of how fast that bitch is going to be when you get it finished!!!!! I still want to race you when i get mine finished!!!!

[Big J]

You better get crackin'.

[VTECin5th]

J HOW MANY PSI DO YOU THINK YOUR GONNA BE PUSHIN BECUASE I KNOW FOR A FACT THAT QR25 CAN'T HOLD MORE THEN 8 PSI ON STOCK INTERNALS

[2.0civic]

J HOW MANY PSI DO YOU THINK YOUR GONNA BE PUSHIN BECUASE I KNOW FOR A FACT THAT QR25 CAN'T HOLD MORE THEN 8 PSI ON STOCK INTERNALS
you know this how?? big j, what kind of times you hoping for?

[Big J]

You should be able to push 10-12 max, so long as the tune is good and you know what your doing. Running the SAFC with throttle position as an imput instead of using a MAP signal probably lowers the max boost potential. I'd say 300-310whp is about as high as I would be comfortable with, that's probably 10-11.5 PSI.

[Sentra]

You should be able to push 10-12 max, so long as the tune is good and you know what your doing. Running the SAFC with throttle position as an imput instead of using a MAP signal probably lowers the max boost potential. I'd say 300-310whp is about as high as I would be comfortable with, that's probably 10-11.5 PSI.


Youre a fucking idiot...

[N/A EK]

^LIRL

[MachNU]

You should be able to push 10-12 max, so long as the tune is good and you know what your doing. Running the SAFC with throttle position as an imput instead of using a MAP signal probably lowers the max boost potential. I'd say 300-310whp is about as high as I would be comfortable with, that's probably 10-11.5 PSI.

Dude with just a turbo upgrade only and some tuning...you might make 100-120 base hp over stock... so with the set up your going you should be making around 275whp....but like everyone else said...on stock internals you aare risking it.

[Big J]

Youre a fucking idiot...

Wow, out of the wood work comes the keyboard tuners. I'm glad you know what's best for my car. I apprciate your concern, but I can garauntee you I'm not a fucking idiot. If you want to present a clear and intelligible argument to back up what your saying I'm all ears.

300 WHP is not risking it, I'll listen to a 19 year old kid who work at a parts store when I need a gas cap.

[fox]

Wow, out of the wood work comes the keyboard tuners. I'm glad you know what's best for my car. I apprciate your concern, but I can garauntee you I'm not a fucking idiot. If you want to present a clear and intelligible argument to back up what your saying I'm all ears.

300 WHP is not risking it, I'll listen to a 19 year old kid who work at a parts store when I need a gas cap.
:lmfao:

[VTECin5th]

Wow, out of the wood work comes the keyboard tuners. I'm glad you know what's best for my car. I apprciate your concern, but I can garauntee you I'm not a fucking idiot. If you want to present a clear and intelligible argument to back up what your saying I'm all ears.

300 WHP is not risking it, I'll listen to a 19 year old kid who work at a parts store when I need a gas cap.


:lmfao::lmfao::lmfao: you owned his ass.

[Big J]

I had to "tin man" the dump tube to get it to route to the othe side of the DP

http://i35.photobucket.com/albums/d157/big_j_1979/turbo025.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo026.jpg

Still clean, but still no drain, even though I have room for it now, didn't have the right drill bit.

http://i35.photobucket.com/albums/d157/big_j_1979/turbo029.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo033.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo034.jpg

Starting to look more like a complete car again.

http://i35.photobucket.com/albums/d157/big_j_1979/turbo035.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo036.jpg

[Da_unknown]

freaking hottt....:lmao:

[Sentra]

Wow, out of the wood work comes the keyboard tuners. I'm glad you know what's best for my car. I apprciate your concern, but I can garauntee you I'm not a fucking idiot. If you want to present a clear and intelligible argument to back up what your saying I'm all ears.

300 WHP is not risking it, I'll listen to a 19 year old kid who work at a parts store when I need a gas cap.

HAHA my age has nothing to do with what I know, and what I know from working at Nissan, and personally driving more boosted spec vs then you will ever dream, is that you will never push that many PSI on your stock motor. you might make it a few minutes, ill give you that... I just dont want to see another QR25 go to waste.

[Sentra]

Dude with just a turbo upgrade only and some tuning...you might make 100-120 base hp over stock... so with the set up your going you should be making around 275whp....but like everyone else said...on stock internals you aare risking it.

Even this goober knows your a fucking idiot.

[~The_Duke~]

If the dude wants to try it and thinks that he can do it, dispite if others tell him that it isnt a good idea...at the end of the day it is his car to do what he pleases, not yours or mine or transaxle's.

I dont know much about the QR25 even though I drive one, but normally stock internals on most cars that get boosted are good for about 15psi give or take a lil bit which is about where he is sitting.

Big J looks good man...I would like to see this thing in person running with no holes in the block :D

[Sentra]

I never said it was a bad idea. I love to see another boosted spec v creeping the streets.

[bdydrpdmazda]

This guy sounds like he knows what hes talking about, if he is capable of boosting it then I think he will know just how far he can push the Qr25, its a bad ass motor and Im sure it will take what you throw at it, good luck. If I keep mine Im gonna go with a supercharger.

[Big J]

Wanted to buy: Stock SRT-4 injectors.

[Big J]

tomarrow it will be done

[~The_Duke~]

sweet...

You should bring it to NP this thrusday...

[Big J]

NP?

[Big J]

It's alive...............................:burnout:

[Siverprobegt]

Saw your car at the public last night.Real nice job on it. :goodjob: Wish you luck with the tuning..PS Your car should hold 10-12 psi with the proper tuning. :D

[N/A EK]

NP?

North Point,Alpharetta meeting:goodjob:

[~The_Duke~]

We meet right behind fudruckers that is right across from North Point mall. It is on north point pkwy.

[2.0civic]

just for everyones info that questioned his choice on 8 PSI......turbonetics makes a BOLT ON KIT that puts out 8 and is said to be good for 300 WHP....that is all...

[Big J]

the main factor is WHP and tuning, PSI is almost irrelevent. But, with this turbo, 10-12 PSI should be around 300WHP

[MachNU]

the main factor is WHP and tuning, PSI is almost irrelevent. But, with this turbo, 10-12 PSI should be around 300WHP

what do you plan on running...day to day bases...then up it to what when you want to fuck with someone? :dunno: :thinking:

[Specsteve]

Big J - Congratulations man, I cant wait to see the car!

to the guys talking about the North Point meet, what time do you normally get together?

[Big J]

what do you plan on running...day to day bases...then up it to what when you want to fuck with someone? :dunno: :thinking:

6-8 PSI (which will fuck with plenty of people), 10-11.5 as a "scramble" function. I plan to run dual boost controllers on a momentary selector switch, 6-8 PSI 1st and 2nd, high boost on up. It's all planned out.

[Big J]

http://i35.photobucket.com/albums/d157/big_j_1979/run.jpg

a little data logging, I'm a fucking idiot

[Ericp]

hey big J, have you checked back on SRTforums, people are throwin you some really good deals on stock injectors :goodjob:

[Big J]

hey big J, have you checked back on SRTforums, people are throwin you some really good deals on stock injectors :goodjob:

Yeah I've checked, soon people are going to pay me to take them. I just need to wait untill this next paycheck. I found some $50 shipped from one guy.

[Firefightin_tC]

J,

When are you going to let me go for a ride, man?

Don't hold out on us Boosted Element folk...:cry:

[Big J]

I think these are the last of the construction pictures:

http://i35.photobucket.com/albums/d157/big_j_1979/turbo052.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo051.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo050.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo049.jpg

It's running great, the idle is a little low, and I need to recirculate the wastegate and add a flex section to the downpipe, but it's well worth the $1052.00 it cost me to do it. I'm really ready to upgrade the injectors, get a boost controller, and turn the boost up. But all in time, I've been patient so far.

[MachNU]

you now though you have at least pushed it hard one time already....does it blow the tires off in 1st and 2nd??????

[Big J]

1st and most of 2nd if I shift hard. It's only on a 3.6 PSI WG spring.

[Ran]

This makes me wish I still had my old 2003 Spec V. :(

[Z33_kid]

looks good

[MachNU]

1st and most of 2nd if I shift hard. It's only on a 3.6 PSI WG spring.

ah yeah thats right...you havent been able to put it up to enough boot yet....right?

let me now when you do...i am curious as to if it will at the lvl your going!!!!

[Georgia_boy]

J good job man
clean ass install.

shit pulls pretty good even on the low boost that your runnin'
can't wait till you add a few more PSI.

[Big J]

I retuned it and leaned it out a little....................much better now, once the boost gets upped and I add a few more little parts, it's going to be a monster

[N/A EK]

Do you have any other mods on your car, like ext. mods or something?

[Big J]

Do you have any other mods on your car, like ext. mods or something?

Not really, and now my rims are powder coated white and the vinyl on the windsgield is gone. The front lip cost me about $20, it's modified vintage 1994 Ford Taraus.

http://i70.photobucket.com/albums/i112/Never2loud/j1.jpg

http://i70.photobucket.com/albums/i112/Never2loud/j2.jpg

those tail lights are long gone

[N/A EK]

Ohh I know that car, see you few times at the V.

[Ericp]

nice man, I can't wait to see it in action

[Big J]

nice man, I can't wait to see it in action

Let me tie up a few loose ends parts wise, up the boost, and I'll give you a good view of the back of it :D

[VTECin5th]

good work J

[91DSM]

now i want to buy a spec and boost it

[N/A EK]

now i want to buy a spec and boost it

Ron has one for sale:D

[Ericp]

Let me tie up a few loose ends parts wise, up the boost, and I'll give you a good view of the back of it :D

:goodjob:

let me know when you get it runnin and we can go from a 40 roll. I wanna see how that thing does :bump:

[Big J]

:goodjob:

let me know when you get it runnin and we can go from a 40 roll. I wanna see how that thing does :bump:

It's running, but it's only on a 3.6 PSI wastegate spring, my stock injectors will max out about 5. I'm not in any hurry to spend anymore money (I only spent $1052), once I get injectors I probably can't run them untill I convert to a return style fuel system ( I don't want to find out the hard way), then that means I'll need a 255 fuel pump, and a fuel pressure regulator. I'm still running a stock midpipe in my exhaust, which is about 2in., so I've got a few more things to do untill it's a real threat. I'm going to slowly collect parts for "stage 2" over the next few months.

[eraser4g63]

Big J,
LMK when you have the Sentra running at max potential. I would like run from a roll, I rather not dig but only IF I have to.

-- KevinT707 --

[Ericp]

It's running, but it's only on a 3.6 PSI wastegate spring, my stock injectors will max out about 5. I'm not in any hurry to spend anymore money (I only spent $1052), once I get injectors I probably can't run them untill I convert to a return style fuel system ( I don't want to find out the hard way), then that means I'll need a 255 fuel pump, and a fuel pressure regulator. I'm still running a stock midpipe in my exhaust, which is about 2in., so I've got a few more things to do untill it's a real threat. I'm going to slowly collect parts for "stage 2" over the next few months.

That's cool man. Just let me know when everything is done :goodjob:

[Big J]

http://i35.photobucket.com/albums/d157/big_j_1979/turbo053.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo054.jpg

[Firefightin_tC]

^^^ Sweet shit, J. It's like having a child...expect you don't have to change diapers and it doesn't wake you up at all times of the night.

[Ericp]

very nice, that's going to be one hell of a sleeper. Did you ever get those SRT injectors?

[Big J]

Working on it. Money's tight, so I'm trying to find some performance wrenching to do to get the cheese. Which reminds me I need to call JB.

[Ericp]

yeah I know what you mean. I'm broke as shit. When I do get my hands on some money it will go to normal matience work. I got my Top End Modifier in the mail but I have to get a new valve cover bolt from Dodge cuz one of mine got welded to my support bracket for my oil line to the turbo. I got a big front mount comin sometime next week.

[Big J]

Allright childern, the cast manifold I used for my setup is from a new company, AutoBoost. Currently they only sell their products on Ebay, but they have manifolds for a about 10 or so diffrent motors. Why should you care? I'm going to be doing a group buy for the QR25DE manifolds on another fourm, $300 + shipping, if you want some more info PM me. They will work for SE-Rs, 2.5 altimas, and god only knows why but 2004+ Nissan frontiers w/ qr25de.

[~The_Duke~]

I would do that, but I dont have the fundage right now...

[Big J]

incase you're interested in a manifold

GROUP BUY LINK (http://myspecv.com/f/view_topic.php?pid=21450#p21450) <---------click here

[Firefightin_tC]

Working on it. Money's tight, so I'm trying to find some performance wrenching to do to get the cheese. Which reminds me I need to call JB.

You damn right you need to call me!:D

[Big J]

I've already got 8 buyers in on this manifold group buy. It's going to close out pretty quickly. If you've got a 2.5 Altima, Sentra SE-R, (or even a 2004+ Frontier pick up) and you want in PM me.

[~The_Duke~]

I got whooped by Big J and the boosted Spec V...

Now that I have seen it in person, props :goodjob:

[Big J]

Yeah that pull from second gear was sick, the third gear was ok.........need a few more PSI, a boost sensor for my data logger, and a few good long highway pulls so I can tune it out a little better (3.5 PSI was fun for about 2 days)

and the open dump :upchuck:, I need to recirc that ASAP. I don't like tuning and not being able to hear the motor.

Good luck with the header.

[~The_Duke~]

Yeah that pull from second gear was sick, the third gear was ok.........need a few more PSI, a boost sensor for my data logger, and a few good long highway pulls so I can tune it out a little better (3.5 PSI was fun for about 2 days)

and the open dump :upchuck:, I need to recirc that ASAP. I don't like tuning and not being able to hear the motor.

Good luck with the header.

I have a feeling that kyle is going to demanding alot of beer after this one...lol

[nextelbuddy]

hey, nice to see your progress. got a few questions for ya though..

what are you using for tuning?

your car runs a MAF sensor instead of MAP and you are currently running your MAF sensor in BLOW THROUGH mode.. although this is good sinc you dont have to recirculate your BOV so your car doesnt spike fuel every time you let off the gas.. its bad because the stock MAF sensors aewre not designed to SEE any boost. thus any boost will cause your MAF sensor to max out really quick most likely causing bucking, hesitation and unreliable fuel delivery.


most people with MAF sensors run their MAF sensor in DRAW THROUGH where the MAF sensor is placed PRE turbo..


example AIR FILTER>MAF SENSOR>TURBO INLET of course when you run it in this method you MUST recircluate your BOV so that you dont loose any metered air.



if you notice almost all factory turbo charged cars with MAF sensors are running this method.. DSM, Supras, Skylines etc..


so back to my question.. what are you using for tuning?

[Big J]

SAFC, and soon injectors and an FPR. Noone has cracked the ECU so I can't scale the fuel tables for larger injectors, but I can drop the base fuel pressure to change how much fuel I have to pull to tune with the SAFC. MAF scewing changes the "load cell" the ECU uses, and to some extent timing, so the less correction I have to add or subtract, the better as far as the small timing changes that happen with it.

The blow through is good on THIS car for a few reasons.

1. Accuracy. The air intake temp sensor is made into the MAF sensor, so I'd rather the ECU compensate for the intake temps that the motor is actually seeing, rather than for air that has been comperssed, heated, cooled down, and was actually metered 6+ feet from the intake. The ricer in me wants an atmospheric BOV, but building a turbo for a car with almost no part support takes you out of the ricer catagory doesn't it?

2. The sensor won't max out untill about 15PSI, but the stock motor will blow at about 12.5 so I got some room. The SAFC corrections are allways pulling fuel so I could allways put the sensor in a larger housing to allow for a little more flow before it maxes out, and in the process get the corrections closer to 0. But I don't foresee building the motor anytime soon so it's not an issue.

3. On throttle lifts the ECU cuts fuel anyway, emissions, so it leans out but only momentarily, it did that N/A.

4. I could use a stand alone or a complex piggy back, but timing isn't a tuning safty issue, AFRs are the main issue. The ECU has VERY extended fuel and timimg maps, almost like it was mapped for forced induction, it takes it like a champ. Untuned I was running 11.9, I leaned it out to near 12.5 (I need to do some long highway pulls to fine tune it). SAFCs are supporting 300+ WHP with no real issues, so untill I really need to go that route I'm going to avoid it. Right now I'm only running a 3.6 PSI wastegate spring, so I'm way out of the turbos effficenty range, and I'm running the stock 2" mid pipe (see below), but it still pulls like a champ.

5. My initial goal was to boost it for under $1000, I spent $1052, the second grand will get me; 2.5" exhaust, clutch, MAP sensor for data logger and SAFC, guages, exhaust parts to recirc the waste gate, heat wrap and shield, injectors, FPR, a few other odds and ends, and some dyno charts. I hope to start doing more fab work to pay for it, and get 2 more rims, AVCR, and some drag radials. The only thing I couldn't do was WELD the aluminum IC pipes, but I cut, fitted, designed, and mocked them for my friend Shane to weld (boosted elements...shameless plug). I did all the other welding and fab.

I went through about every option, compared, researched, and what I went with is right for my goals and this car.

This is a little data logging I did (I recomend this logger, $279 can bo a fraction of what a good dyno tuning session costs), eventually I'm going to add the MAP sensor and convert my SAFC to use MAP voltage insted of TPS, again accuracy.

http://i35.photobucket.com/albums/d157/big_j_1979/run.jpg

[Big J]

... its bad because the stock MAF sensors aewre not designed to SEE any boost...

Correct, nor vaccum. The element is in a window that samples a fixed portion or ratio of the air passing through the sensor housing. The ECU knows the element is seeing 1/100 (made up number) of the total MASS of air passing through the MAF housing. MASS is the total number molecules, density is molecules per volume. The "ideal gas law" states the volume of a given MASS of a gas is a function of pressure and temperature. SO, no matter what the PSI or tempature the MAF is still just metering mass.

[Big J]

New toy:

http://i35.photobucket.com/albums/d157/big_j_1979/turbo003.jpg

http://i35.photobucket.com/albums/d157/big_j_1979/turbo002-1.jpg

It's almost time......... again

[Firefightin_tC]

I call SHOTGUN! :thumbsup:

[Big J]

you start geting more parts rounded up and I'll honor the dibs

[Big J]

ohhhh I got some intercooler piping back......but my camera is in California w/ the girlfriend........it's some nice stuff

[Big J]

pics, enjoy.

I'll have pics mocked up for fit on the car when my silicone and t-bolts get here, grrrr.

http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes006.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes005.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes004.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes003.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes002.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/turbopipes001.jpg

[Big J]

http://i35.photobucket.com/albums/d157/big_j_1979/Picture275-1.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/Picture269.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/Picture268.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/P6096284.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/JustinTurbo026.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/JustinTurbo024.jpg
http://i35.photobucket.com/albums/d157/big_j_1979/Dsc04516.jpg

[Da_unknown]

dam, looks good

[Ericp]

FUCKIN SEXY

[Big J]

Ok I finally went to the dyno, how's this for sexy:

these were the first two runs at 5psi so the motor was fairly cool, the best numbers I've ever seen at such low boost :)

http://i35.photobucket.com/albums/d157/big_j_1979/6PSI.jpg

the next two runs I did were at 8 psi, I added some fuel after the first pull to get it under 12:1
http://i35.photobucket.com/albums/d157/big_j_1979/high.jpg

.....so after adding fuel to run 8 psi I did this pull at 6.5 and the AFR's were rich, around 11ish

http://i35.photobucket.com/albums/d157/big_j_1979/8psirich.jpg

so after pulling a little fuel between runs I ended up with this graph and a better AFR, but at this point, after 7 pulls, I'm sure heat soak was taking it's toll even though the numbers were better.

http://i35.photobucket.com/albums/d157/big_j_1979/8psi12ish.jpg

It's suprising what the diffrence between 5psi and 8psi feels like for only being 33 whp and 32 WTQ.

[Firefightin_tC]

Yummy.

[.gauge.]

Good stuff.:yes:

[Big J]

That's what a TQ curve should look like:)

now I just need like 1000 more RPM's :(

[Julio]

bad ass man! Clean work to...

[sleepys4]

Yea congrats on those numbers. Sick little torque curve.

[fox]

Wow. Glad to see it finally up and running hard.
Congrats.

[ksinao]

impressive man.

[Big J]

I'm pulling it back in to the shop tomarrow for a little this and that. Nothing major, just some stuff to control underhood temps, and a dual stage boost controller master ghetto tech style, and lower temp thermostats (yes stats, as in it has more than 1). If I have the time, I'll fab an intake to put the filter outside the engine bay, and a battery tray to relocate the battery to the fenderwell. These 100* temps have been hell on power output, but have been an excellent test of extreme conditions and durability, and it passed with flying colors. I'm more that happy with the performance, quality, and safety of this kit for it to be released to the public as is. I just got the skillz to make sure mine stays 1 up on everyone else.

No real major upgrades unitll I get some more supporting mods like a clutch/flywheel and fuel pump (fuel pump, yeah I know, whatever I'm broke)....... or more sponsors and/or another/different job.

The engine build is done on paper except for one little issue, but I'll have the answer to that soon enough.

You might be seeing a simiular engine build in Mike Kojima's 2003 Spec v time attack car............

[Big J]

Got some new numbers

5psi (my baseline, line pulled of MBC)

8psi

9psi

http://myspecv.com/fs/big_j/1a1anewdynos.jpg