2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

is there a way to add more back pressure?

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Old 07-13-2010, 11:16 PM
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is there a way to add more back pressure?

okay I have a header, dp and 3" exhaust frankly I think I don't have much backpressure for my mods. Is there a way like putting an extra resonator or something in the mix to obtain more back pressure? Or maybe a 3" inlet to a 2.5" outlet muffler? I REALLY don't want to get a new exhaust put on..

switching to a 2.7" and corresponding mods soon, but right now I have a 3" pulley and 42#
Old 07-13-2010, 11:37 PM
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Why would you want more back pressure? With a 2.7, you should AVOID back pressure!
Old 07-13-2010, 11:39 PM
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put a potato in your exhaust tip.
Old 07-13-2010, 11:45 PM
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don't worry about it since the 2.7 is going on. i hit 273/250 on a 2.8 and full 3" header back. a 2.7 will produce great numbers. what do you mean by "corresponding mods" though?


but if all else fails. potatos work great.
Old 07-14-2010, 09:07 AM
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u dont want back pressure dumb ass
Old 07-14-2010, 10:12 AM
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Originally Posted by mrbelvedere
u dont want back pressure dumb ass
Is an answer like that really necessary?
Old 07-14-2010, 10:14 AM
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yah welll you are on cobaltss.net.... people are dicks on here
Old 07-14-2010, 10:16 AM
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Originally Posted by Bluelightning
Is an answer like that really necessary?
yes, yes it is
Old 07-14-2010, 10:17 AM
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try an exhaust tip baffle i used to see mustangs with them all the time... or you can just leave it be because there's nothing wrong with it
Old 07-14-2010, 10:23 AM
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Just jack your car up by your exhaust.........
Old 07-14-2010, 10:56 AM
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Originally Posted by jhop16
yah welll you are on cobaltss.net.... people are dicks on here
Lol ya i know all too well
Old 07-14-2010, 11:35 AM
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The level of idiocy in this thread is amazing.

In switching to a 3" exhaust system he lost a lot of low end torque, partially caused by getting rid of the backpressure in the system. Huge exhausts are great for WOT, terrible for daily driving.

Switching to a 2.7 will help this a lot. I'd say wait for that before you go doing other **** to your car.
Old 07-14-2010, 11:39 AM
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keep the 3" you don't want to go smaller if you plan on going bigger in the future
Old 07-14-2010, 12:07 PM
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Originally Posted by Dainslaif
The level of idiocy in this thread is amazing.

In switching to a 3" exhaust system he lost a lot of low end torque, partially caused by getting rid of the backpressure in the system. Huge exhausts are great for WOT, terrible for daily driving.

Switching to a 2.7 will help this a lot. I'd say wait for that before you go doing other **** to your car.
This is what I meant! Thank you! I don't know why others have to be assclowns about it. The thing is I do not do burnouts like I used to. My high end 40+mph is great , but it takes a bit longer to get there. Plus my exhaust backfires when I shift? normal?

Oh and by the way, what is the point of calling me a *******? I would like you to tell me that in person and we can see how your face feels afterwards

corresponding mods= injectors + tune (some people are not so bright and think I might just throw a smaller pulley on)
Old 07-14-2010, 01:41 PM
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Originally Posted by moranjames89
This is what I meant! Thank you! I don't know why others have to be assclowns about it. The thing is I do not do burnouts like I used to. My high end 40+mph is great , but it takes a bit longer to get there. Plus my exhaust backfires when I shift? normal?
If you're talking about the popping noise, that's normal and nothing to worry about.
Old 07-14-2010, 01:57 PM
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Auger insert from jegs
Cut 1/3 of it off, tack weld in pipe
Works great

Auger insert from jegs
Cut 1/3 of it off, tack weld in pipe
Works great

Last edited by JapEatr; 07-14-2010 at 01:57 PM. Reason: Automerged Doublepost
Old 07-14-2010, 02:36 PM
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Originally Posted by moranjames89
This is what I meant! Thank you! I don't know why others have to be assclowns about it. The thing is I do not do burnouts like I used to. My high end 40+mph is great
I would think that would be better for racing. I know with my car i gotta lug it hard out of the hole or i just spin like a bastard
Old 07-14-2010, 03:36 PM
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Originally Posted by moranjames89
This is what I meant! Thank you! I don't know why others have to be assclowns about it. The thing is I do not do burnouts like I used to. My high end 40+mph is great , but it takes a bit longer to get there. Plus my exhaust backfires when I shift? normal?

Oh and by the way, what is the point of calling me a *******? I would like you to tell me that in person and we can see how your face feels afterwards

corresponding mods= injectors + tune (some people are not so bright and think I might just throw a smaller pulley on)
no. the reason i asked is because you don't have your mods listed.

Originally Posted by Dainslaif
The level of idiocy in this thread is amazing.

In switching to a 3" exhaust system he lost a lot of low end torque, partially caused by getting rid of the backpressure in the system. Huge exhausts are great for WOT, terrible for daily driving.
isn't WOT when you want all your performance anyways???

as far as a 3" not being able to provide enough trq...idk about that


Last edited by EXsoccer1921; 07-14-2010 at 03:36 PM. Reason: Automerged Doublepost
Old 07-14-2010, 04:46 PM
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jokes are ok. what is wot? I am not a mechanic. my best guess is w.hile o.n t.hrottle.
Old 07-14-2010, 04:50 PM
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back pressure on a forced induction car is not your friends you want to open it up so you can throw a smaller pulley or more boost on it.
Old 07-14-2010, 04:58 PM
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Originally Posted by neumannl001
jokes are ok. what is wot? I am not a mechanic. my best guess is w.hile o.n t.hrottle.
Lol close, wide open throttle
Old 07-14-2010, 05:24 PM
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Originally Posted by moranjames89
Oh and by the way, what is the point of calling me a *******? I would like you to tell me that in person and we can see how your face feels afterwards
whats the point huh lmao if i was in chi town i would call you what you are a ******* to your face and you wouldent do a dam thing about it you little 16 yr old ****

Originally Posted by jhop16
yah welll you are on cobaltss.net.... people are dicks on here
yea there are ********* on here and look why stuid questions like this and the same questions all the time so go figure why

Last edited by mrbelvedere; 07-14-2010 at 05:24 PM. Reason: Automerged Doublepost
Old 07-14-2010, 08:45 PM
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Originally Posted by EXsoccer1921
isn't WOT when you want all your performance anyways???
Obviously, but since most of us only go race a couple times a hear, it makes sense that he'd look into improving the daily drive over ***** out performance. If I could swap my 3" out for a 2.5" system at no loss, I'd do it in a heartbeat.
as far as a 3" not being able to provide enough trq...idk about that

http://i281.photobucket.com/albums/k...t-dd-graph.jpg
Didja miss the part where I said low end torque? We're talking daily driving scenarios - below about 2500 RPM my car felt slow as hell compared to the stock exhaust until I threw the 2.7 on it.
Old 07-15-2010, 09:58 AM
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Originally Posted by Dainslaif
The level of idiocy in this thread is amazing.

In switching to a 3" exhaust system he lost a lot of low end torque, partially caused by getting rid of the backpressure in the system. Huge exhausts are great for WOT, terrible for daily driving.

Switching to a 2.7 will help this a lot. I'd say wait for that before you go doing other **** to your car.
yeah but your bragin about your trap speed in your sig
Old 07-15-2010, 11:26 AM
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Originally Posted by JapEatr
Auger insert from jegs
Cut 1/3 of it off, tack weld in pipe
Works great

Auger insert from jegs
Cut 1/3 of it off, tack weld in pipe
Works great
I knew I needed that ****!! the stupid old guys at the shop called it a "whistler" and convinced me not to put it in!,

Originally Posted by mrbelvedere
whats the point huh lmao if i was in chi town i would call you what you are a ******* to your face and you wouldent do a dam thing about it you little 16 yr old ****

yea there are ********* on here and look why stuid questions like this and the same questions all the time so go figure why
quite ethuggin it country boy, not your style. Go ahead drive your tractor up here... don't forget your cousin and half a deer... now please shut up and let us men talk about back pressure and how it is most likely essential for low end power. 16? lol. give me a break, rednecks make me giggle.

Last edited by ecot3c inside; 07-15-2010 at 11:26 AM. Reason: Automerged Doublepost


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