Mainstream Tuned Bolt on WRX

[EmminoDaGreat]

As many of you may or may not have seen I posted a thread for free tuning to someone willing to let us try our new tuning software out on their car.
As you can see the boost is very fluttery and unstable, with stable boost, this car could have made much greater/smoother power.

More suby's to come, later in the week.


The results are as following

The car

stock 05 wrx w/:
Exhaust
aftermarket up/down pipes
large fmic
baseline vs. quick tune


for those that think i just turned up the boost...wrong. couldn't get the boost to stabilize and hold past 5k. it kept falling to 7ish psi @ redline no matter what i did w/ the internal boost feature.

20whp 15wtq gain from just basic tuning. if i could get the boost to stabilize we could've seen gains of 30whp+. much smoother power than stock as well.

[calmnothing]

Interesting with the FMIC on a stock turbo wrx....nice gains though

[Big Baller]

is that 13 to 1 in boost....have you lost your mind

[EmminoDaGreat]

Baller, re look at that, that is the boost hence it says "analog" and not "air fuel"

Also where I say, check out the way the boost fluctuates.

[ianb52]

Question, I have a 03 wrx which i picked up used. The previous owner installed a borla exhaust with pipes and he put a boost gauge on the column so since i got it i have noticed when floored it will boost to almost 20 psi and it bounces from 15-20. Is this the same result you had and if so can you lend any insight on what to do because i know its a matter of time till the stock turbo croaks at this rate. Also am i right in the assumption that the larger exhaust is whats causing the higher boost?

[turbomirage]

Why would your turbo croak? Just because it is boosting 15-20psi? Is the needle spiking to 20 psi, then dropping to 15 psi... Or fluctuating between the two when your at WOT? And no, putting a bigger exhaust on your car does not increase boost pressure. All it does is free up power throughout your powerband and helps your turbo breath... especially in the upper part of your powerband.

[Slomaro Z28]

The FMIC on the stock turbo is probably the boost problem with the test car. IIRC it hurts more than helps until you go with a bigger turbo. ( at least a VF34)

[EmminoDaGreat]

The FMIC on the stock turbo is probably the boost problem with the test car. IIRC it hurts more than helps until you go with a bigger turbo. ( at least a VF34)

I assumed it would hurt more than help, I just didnt think it would make the boost flutter as badly.

[Slomaro Z28]

I assumed it would hurt more than help, I just didnt think it would make the boost flutter as badly.

That I don't know, but I know you lose some power. A bigger top mount would have been better, but hey I love the look of a FMIC too.

[Big Baller]

Baller, re look at that, that is the boost hence it says "analog" and not "air fuel"

Also where I say, check out the way the boost fluctuates.

Sorry, Thank god, I was sitting here thinking someone had a time bomb on their hands. Boost usually falls off pretty hard on the subies I would say 7 psi is not uncommon. Put a manual boost controler on it and retune it, thats what all the cool kids do.

Personally I would put a Spec B on it but if you ask the TOONERS they don't work on subies.

[Big Baller]

That I don't know, but I know you lose some power. A bigger top mount would have been better, but hey I love the look of a FMIC too.

Thats such a load of shit, go back to reading Nasioc. A front mount never hurts more than it helps even on a stock turbo car.

[EmminoDaGreat]

I only hurts in the sense that boost pressure will drop, hence make less power, I personally think with a stock turbo, stock top mount, it would have spooled a tad faster, and made a little more consistent power. Take a turbo dsm for instance, you put a FMIC on them, and they drop boost pressure in turn loosing some power. However with a boost controller, this can be counteracted.

[Vteckidd]

Bigger turbo, boost controller , call it a day

I think he needs to do the restrictor pill mod and he'll be ok

[Slomaro Z28]

Thats such a load of shit, go back to reading Nasioc. A front mount never hurts more than it helps even on a stock turbo car.

I need not reply, emmino pretty much said it.....and BTW that info came from one of your WRX/STi forums......and from what I read (like a year ago so I don't remember where) only the WRX has the problem, not the STi.

Not saying I am right, just stating what I read on the WRX/STi forums.

[TopSpeedInc]

Ecuflash and the stock boost control setup is definitely capable of making a smooth boost curve.

Siegel

[batlbrandon]

Wow an appearance by Flock of Siegels

[Big Baller]

I need not reply, emmino pretty much said it.....and BTW that info came from one of your WRX/STi forums......and from what I read (like a year ago so I don't remember where) only the WRX has the problem, not the STi.

Not saying I am right, just stating what I read on the WRX/STi forums.

Oh I know where it came from, people just read shit on the internet and assume that its true when in reality its just not. A top mount intercooler is not more consistent by any means. Its smaller and takes less time to fill, by less time we are talking barely noticeable. Do you know how long it takes a stock subaru turbo to charge 10 feet of 3 inch piping....go ahead Ill wait on your answer.

[TopSpeedInc]

Wow an appearance by Flock of Siegels

I'm always here, you just don't notice me

[Slomaro Z28]

Oh I know where it came from, people just read shit on the internet and assume that its true when in reality its just not. A top mount intercooler is not more consistent by any means. Its smaller and takes less time to fill, by less time we are talking barely noticeable. Do you know how long it takes a stock subaru turbo to charge 10 feet of 3 inch piping....go ahead Ill wait on your answer.

I'm not trying to argue with you or say you're wrong.....I was just stating where it came from because you told me to go read another site.

BTW I was ONLY stating what I had read and not saying I knew if it was wrong or right.

[Deke]

I'm not trying to argue with you or say you're wrong.....I was just stating where it came from because you told me to go read another site.

BTW I was ONLY stating what I had read and not saying I knew if it was wrong or right.

Reps for the calm and mature answer.

[Big Baller]

I'm not trying to argue with you or say you're wrong.....I was just stating where it came from because you told me to go read another site.

BTW I was ONLY stating what I had read and not saying I knew if it was wrong or right.

Thats the problem with forums people are always stating what they read as fact.

[EmminoDaGreat]

Ecuflash and the stock boost control setup is definitely capable of making a smooth boost curve.

Siegel

Scotty was trying to get the lil bugs worked out with the internal boost control features, which I dont believe he could get to work. Oh well all in time, Just got to learn the features of the new system.

[Slomaro Z28]

Well good luck with it, I have been looking at 04ish STi's. I can't find anything for sale with a big turbo already installed though.

[Vteckidd]

If you look at the stock graph with a stock pull the boost is choppy, even before the ecu flash was done

[Vteckidd]

This guy had the monster Perrin fmic too which IMO and my limited scooby knowledge is prob overkill for a stock turbo wrx. His only other mods are upipe downpipe and exhaust.

I think a ginormous 3 in intercooler is prob a little aggressive for his setup and likebsller said adds a rediculous amount of piping .

Hence why I said bigger turbo, boost controller

[Z0_o6]

y'all will get it with more practice! i'm glad to see y'all tackling subaru's on top of everything else, and I wish y'all luck with it. imho the subaru's are one of the more finicky cars to tune, because they are so sensitive to each mod (however I can only speak from what I have read about STi's, which may be totally different ECU-wise)

keep it up!

Slomaro- there is an 04 STi for sale on here for 21.5K by Leh Keene that is the absolute best possible deal you will find on a big turbo STi right now. It has over 20 grand in just the motor already, and the car is an absolute monster. You should definitely check it out if you want a badass STi on the cheap. the car has a 35R kit on a Crawford 2.65L closed deck sleeved stroker motor with all the supporting goodies. It makes nearly 600whp on race gas on one of the lowest reading dyno's in the country.

[Big Baller]

y'all will get it with more practice! i'm glad to see y'all tackling subaru's on top of everything else, and I wish y'all luck with it. imho the subaru's are one of the more finicky cars to tune, because they are so sensitive to each mod (however I can only speak from what I have read about STi's, which may be totally different ECU-wise)

keep it up!

Slomaro- there is an 04 STi for sale on here for 21.5K by Leh Keene that is the absolute best possible deal you will find on a big turbo STi right now. It has over 20 grand in just the motor already, and the car is an absolute monster. You should definitely check it out if you want a badass STi on the cheap. the car has a 35R kit on a Crawford 2.65L closed deck sleeved stroker motor with all the supporting goodies. It makes nearly 600whp on race gas on one of the lowest reading dyno's in the country.

Leh is a great guy and he doesn't own any junk, its amazing that car hasn't sold yet.

[Slomaro Z28]

Slomaro- there is an 04 STi for sale on here for 21.5K by Leh Keene that is the absolute best possible deal you will find on a big turbo STi right now. It has over 20 grand in just the motor already, and the car is an absolute monster. You should definitely check it out if you want a badass STi on the cheap. the car has a 35R kit on a Crawford 2.65L closed deck sleeved stroker motor with all the supporting goodies. It makes nearly 600whp on race gas on one of the lowest reading dyno's in the country.

I looked at it. It is an awesome deal, I'm just searching and waiting for tax season (if we even get returns) Then I'll be in the 21-28k range, but all I can find are stock.

[EmminoDaGreat]

y'all will get it with more practice! i'm glad to see y'all tackling subaru's on top of everything else, and I wish y'all luck with it. imho the subaru's are one of the more finicky cars to tune, because they are so sensitive to each mod (however I can only speak from what I have read about STi's, which may be totally different ECU-wise)

keep it up!

Slomaro- there is an 04 STi for sale on here for 21.5K by Leh Keene that is the absolute best possible deal you will find on a big turbo STi right now. It has over 20 grand in just the motor already, and the car is an absolute monster. You should definitely check it out if you want a badass STi on the cheap. the car has a 35R kit on a Crawford 2.65L closed deck sleeved stroker motor with all the supporting goodies. It makes nearly 600whp on race gas on one of the lowest reading dyno's in the country.

Really all we were going for is to get some practice in with the new ems's we have got, and to let everyone know that we can/will tune any and all makes/model cars.

As everyone can see the boost mimic's its original graph from when we threw it on and made a pull, so its evident we just messed with some a/f's and timing. Thanks for the support.

[TS240]

Good shit fellas!

[UpSideDownDesi]

I am guessing he had after market BOV? If stock then, tap the BOV ninja mod.
Boost tapering down by redline is very common in subies.
Front mount on stock turbo, never hurts, but overkill yes. If he's planing on stick with stock turbo (any vf series or 18g) and nice top mount or sti top mount will do a great job.

[Z0_o6]

Leh is a great guy and he doesn't own any junk, its amazing that car hasn't sold yet.

trust me, within an hour of seeing it posted up I had already made a couple phone calls and gotten an answer from him personally. That is how bad I want that car. Just isn't gonna happen unfortunately, so I'm just gonna finish building what I have now and hopefully it will compete, if not be better.

[MongolPup]

I'd like to give a shout out to BigBoosting.

[AFSil80]

I'd like to give a shout out to BigBoosting.

Holllerrrrrr

[scttydb411]

Ecuflash and the stock boost control setup is definitely capable of making a smooth boost curve.

Siegel

you are correct, but the stock turbo on a much larger fmic causes a boost drop up top. looking at the graph the boost issue i was referring to was it dropping off preventing making more power. i had the same exact turbo on my honda w/a starion fmic which is fairly thin and maintained boost all the way to redline, but after installing a much larger and thicker fmic boost would fall off up top because that small of a turbo has trouble maintaining stable boost over larger volumes...it just can't flow as much.

it would've been better to have kept the stock top-mount or an upgraded topmount or a larger higher flowing turbo with the larger fmic.

the boost fluctuations did not affect the power, hence a much smoother curve and better/improved powerband which is the point.

[turbomirage]

For some of you, remember when that guy with the boosted Miata was getting hated on because his intercooler was small, but he was only boosting 8 psi? It's called being efficient... another example why having a bigger intercooler is not always better.

[TopSpeedInc]

As you can see the boost is very fluttery and unstable, with stable boost, this car could have made much greater/smoother power.

Ecuflash and stock boost control hardware is capable of a perfectly stable "non-fluttery" boost curve. There is no hardware change required to make a PERFECTLY smooth curve. It will of course drop up top, but it should be perfectly smooth with no waves.

Siegel

[Tracy]

Oh the lovely world of Subaru's. Have fun!

[EmminoDaGreat]

Ecuflash and stock boost control hardware is capable of a perfectly stable "non-fluttery" boost curve. There is no hardware change required to make a PERFECTLY smooth curve. It will of course drop up top, but it should be perfectly smooth with no waves.

Siegel

I think you keep skipping over the part where I stated, we did not use the boost control option, as we where still trying to figure everything out with the software. But thanks for the love!

[Tracy]

I think you keep skipping over the part where I stated, we did not use the boost control option, as we where still trying to figure everything out with the software. But thanks for the love!

Boo, They are the only ones who know about Subaru's. Kind of like you guys are the only ones who know about Honda's

I am so kidding, kind of