7 lbs. worth of exhaust v1.0....JJSPEC

[CaTcH22]

What would you say to a 7lbs. complete exhaust system. :goodjob:
Well... we got it. On our Single Slam Integra.
We currently have a full aluminum Downpipe back exhaust with a light stainless steel downpipe, but we couldnt find alot of options for an aluminum muffler. So we decided today that we would fabricate one, being that some event classes require a muffler and exhaust system. So this is perfect for event legality and weight reduction.
We had a 4 inch canister (:ninja:) laying around the shop and decided to use it for the body of the muffler. It is fully resonated and there is sound deadening used around the wall of the canister to add extra sound absorbance. 2lb. DP + 3lb. piping + 2lb. muffler = 7lbs. complete.
We are mounting it Saturday and are testing it Sunday at IFO.
Tell us what you think. ;)
http://i728.photobucket.com/albums/ww287/QWKD15/1016091650.jpg

http://i728.photobucket.com/albums/ww287/QWKD15/1016091829.jpg

http://i728.photobucket.com/albums/ww287/QWKD15/1016091830a.jpg

http://i728.photobucket.com/albums/ww287/QWKD15/1016091830.jpg

Thanks guys.

[jhadleyh]

nice

[bb4pimp]

that looks sick

[NoWAyItZTOMmY]

cool

[JJSPEC Racing]

I cant wait to see how it sounds. Should be a little quieter since it is actually a functioning unit. Thanks to QWK D16 for getting stuff cut up and perforating the inner pipe so we could get that piece welded up.

[J-ROCK]

is that a fire extinguisher??? also thats pretty cool

[CaTcH22]

is that a fire extinguisher??? also thats pretty cool
NO....:ninja:

[JJSPEC Racing]

is that a fire extinguisher??? also thats pretty cool

Now who would use a fire extinguisher as a muffler, lol. Love the sig btw, Pacman is cool.

[jdm>usdm]

Hella dope

[goi_ek]

cool

[94@ccordLX]

that looks really nice. i love the way the turn down tip is.

[J-ROCK]

NO....:ninja:

haha lolz actually very good way to save cash though just use whats layin around! yall may need to make to as soon as i get my integra ready for tuning around next summer




Now who would use a fire extinguisher as a muffler, lol. Love the sig btw, Pacman is cool.

most likely jjspec seein as they use almost everything for something lolz and yeah i saw it and was like wtf hahahaha reps to yall on teh exhaust

[JJSPEC Racing]

haha lolz actually very good way to save cash though just use whats layin around! yall may need to make to as soon as i get my integra ready for tuning around next summer

most likely jjspec seein as they use almost everything for something lolz and yeah i saw it and was like wtf hahahaha reps to yall on teh exhaust

Thanks! We do believe in recycling, haha.

[Evil Goat]

c'mon guys....my camera is laying on the desk in the office :D

looks much better than i first anticipated....ya'll had me confused yesterday, i thought Justin was honing in his plasma skills or something, lol....

the cool thing is with a muffler this brings the total exhaust weight of the dp back section to around 7lbs max....and it functions :eek:

[Nerdsrock22]

Bahhhh...awesome. I may have to come hear it this week.

[white93gs-r]

thats pretty sweet there jimbo. nice job.

[91LudeSiT]

You guys must have someone who is amazing at welding aluminum, that shit is hard as hell to do well. What did the previous exhaust weigh in at?

[tk4g94]

should be sweet

[Evil Goat]

What did the previous exhaust weigh in at?

when the original went on we saved just over 30lbs of weight...with the muffler setup we're looking at a weight savings of around 28+ lbs :goodjob:

[mtny]

Wow I need that. How much does it run?

[Evil Goat]

Wow I need that. How much does it run?


$450-500 range, header back, no cat/muffler, for most cars

the muffler portion is a new addition that will require testing before we begin to offer it, when we originally did the aluminum exhaust the car picked up 3psi by changing the exhaust only, not to mention the weight difference

[Big Baller]

Thats cool but get ready to re weld it...because its going to break. Aluminum just won't put up with the vibrations long term. Its to stiff a material and it gets weak around the welds.

[KDM>JDM]

JJspec doing it big

[D3UC3S]

Thats innovation right there!!!:goodjob:

Great way to screw emissions AND be green at the same time LOL.

[Evil Goat]

Thats cool but get ready to re weld it...because its going to break. Aluminum just won't put up with the vibrations long term. Its to stiff a material and it gets weak around the welds.

4k+ miles daily driving & 30+ 450hp/400 ftlb passes says otherwise, not one single issue :goodjob:

[Big Baller]

4k+ miles daily driving & 30+ 450hp/400 ftlb passes says otherwise, not one single issue :goodjob:

I'm sure you are right, what do I know about material strength or aluminum exhaust....lol

[Evil Goat]

I'm sure you are right, what do I know about material strength or aluminum exhaust....lol

i'm not saying it won't happen....it may, but the welds were properly prepped and laid, we don't expect it to have anymore problems than you would see out of SS, etc

[Matt478]

nice son

[.:Stirfry:.]

JJSPEC ftw

[Big Baller]

i'm not saying it won't happen....it may, but the welds were properly prepped and laid, we don't expect it to have anymore problems than you would see out of SS, etc

Its not the weld that you should be worried about, its the material its welded to. Its going to crack right at the weld. Aluminum just isn't a good exhaust material. Its cool and its loud as hell because it resonates, but it just doesn't have the right mechanical properties. If you want to do something trick build it out of Inconel or some really thin stainless. I'm not trying to slam you I'm just warning you every aluminum exhaust I have ever seen has cracked.

[WalkS]

That's awesome! Can't wait to hear it now. Did the inside diameter change from the previous exhaust?

[NVEOUS]

This is so BADASS!!!!! Cant wait to find out how it performs.

[Evil Goat]

That's awesome! Can't wait to hear it now. Did the inside diameter change from the previous exhaust?

nope!

[Evil Goat]

here's the rest of the exhaust when it was first fabricated....

http://www.maconracers.org/imagehost/pics/3ac243b07822da19870f7c6101a2ad8c.JPG

[JJSPEC Racing]

I just came in from prepping the car for IFO and getting everything ready. I weighed the dp back, which includes the muffler and it weighed 5 lbs. Previously just piping it was 3.5 lbs. It does sound toned down at idle a little. I understand the concerns of the al breaking, but it is properly designed with supports in the correct location to hold it stress free. The engine mounts are stiff enough that it doesnt move much. I built this exhaust to see how reliable it can be. The tone was muffled from the exhaust to the point that I had a few people tell me it sounded like it was under water, haha. It should hold up and there are no visible stress cracks that I found today when I dropped it to weld it.

[D3UC3S]

5lbs!!!!:eek:

[JJSPEC Racing]

You guys must have someone who is amazing at welding aluminum, that shit is hard as hell to do well. What did the previous exhaust weigh in at?

Just saw this. We do have some local machine shops that bring their aluminum heads to us when they have issues from corrosion, cracks and other things for me to weld up for them. Thanks.

[ep9716]

WTF that shit is ugly

[Da_unknown]

cool shit

[Evil Goat]

WTF that shit is ugly

it's a race car that you will never outrun....who cares if it's pretty?

[JJSPEC Racing]

WTF that shit is ugly

At least most of it is hidden under the car. I will get someone to take a picture from the back tomorrow so that you can see what the tip looks like which is the view that hopefully most people will be seeing:D

[J-ROCK]

theres a civic running around macon with a turn down on his and it looks damn good

[Tree]

i'm in love with that style

[MK3 SupraJ]

it's a race car that you will never outrun....who cares if it's pretty?
I agree with you on that Josh

[AFSil80]

I'm interested to hear it, because the straight through design that was on there wasn't very loud to begin with.

[CaTcH22]

I'm interested to hear it, because the straight through design that was on there wasn't very loud to begin with.
It may not be that much more quiet, but it will pass for a muffled exhaust system, for competitions. BUT we might design a resonator closer to the middle of the system where the sound needs to be captured. And next will be designing it in sections, with unboltable pieces for servicing/removal.

[Drummerboy]

Just to clarify, and please correct me if im wrong. But wouldn't this only give significant gain to a drag car, or a car thats mainly going straight? Because I thought the idea was to have a lower center of gravity when turning. And the exhaust is about as low as you can get. I understand it will help with heat and what not.

oh and I know its on a drag car, I was just thinking about if it makes it to production.

[CaTcH22]

Just to clarify, and please correct me if im wrong. But wouldn't this only give significant gain to a drag car, or a car thats mainly going straight? Because I thought the idea was to have a lower center of gravity when turning. And the exhaust is about as low as you can get. I understand it will help with heat and what not.

oh and I know its on a drag car, I was just thinking about if it makes it to production.
Not sure, but I wouldnt want 40 lbs of exhaust tryin to sway side to side under my car. A lower center of gravity and wider stance doesnt really include exhaust, just suspension and steering components. But I understand what you mean. :goodjob:

[Big Baller]

A lower center of gravity includes everything, but you never add weight to get a better center of gravity.

[Krappy]

it's a race car that you will never outrun....who cares if it's pretty?

If you're gonna say that then the car doesnt need paint or any cosmetic changes then....

[Evil Goat]

If you're gonna say that then the car doesnt need paint or any cosmetic changes then....

that's MY opinon....my car is stock bodied, so you're right, it doesn't need paint or cosmetic changes

[masonhenson]

light!

[JJSPEC Racing]

Just to clarify, and please correct me if im wrong. But wouldn't this only give significant gain to a drag car, or a car thats mainly going straight? Because I thought the idea was to have a lower center of gravity when turning. And the exhaust is about as low as you can get. I understand it will help with heat and what not.

oh and I know its on a drag car, I was just thinking about if it makes it to production.

I will be doing a sunroof delete over the winter so that should help equal everything out being that it is pretty high up. Lower overall weight would help a road course car by helping acceleration out of the corner and reducing braking distance also. I do agree that a lower center of gravity helps turning stability.

[Drummerboy]

I will be doing a sunroof delete over the winter so that should help equal everything out being that it is pretty high up. Lower overall weight would help a road course car by helping acceleration out of the corner and reducing braking distance also. I do agree that a lower center of gravity helps turning stability.


Yeah I'm hoping to pick up a cheap DD next summer so i can go all out with the prelude. They make a CF sunroof plug that saves like 20lbs after removing the track and steel sunroof. at only $300, im very tempted.