This is a discussion on back pressure???????????? within the Camaro / SS forums, part of the Vehicle Specific category; do ls1's need back pressure? i just took off my muffler and my dad said i will mess up my ...
12-13-2005, 08:00 PM #1mrdirtyz28Guest
do ls1's need back pressure? i just took off my muffler and my dad said i will mess up my car.im scared any help? the guy at the muffler shop said they don't need back pressure.
Last edited by mrdirtyz28; 12-14-2005 at 06:24 PM.
12-14-2005, 12:57 PM #2
you have more than 1 muffler? Its not good for your car to not have mufflers, yet it wont hurt it unless you drive it like 100k without them98' SS Convertible Camaro-76k-Build # 1471, Cragar SS rims, RK SFC's, MAC Panhard, LSX Tune, Shaner S3,
SLP:short thro,Strut tower brace,fan switch
MTI Power induction kit,40 Series muffler,Pacesetter LT's + ORY,12 CD changer,3800lbs
12-14-2005, 01:21 PM #3
- Join Date
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- 07 TBSS, 07 GSXR1000
Most guys run cutouts. But there is still alittle bit of back pressure. I wouldn't leave it like that for ever.
12-14-2005, 03:41 PM #4redls1birdGuest
you dont HAVE to have backpressure. although you will probably lose power without it. back pressure can actually create a scavenging effect on cylinders that helps draw in more a/f mixture during overlap. one way a n/a engine can have over 100% volumetric efficiency is with a tuned exhaust, even if it is only for a few hundred rpm's.
12-14-2005, 03:45 PM #5
cool icon redls1bird
12-14-2005, 03:45 PM #6
my sig isnt showing up
12-14-2005, 04:37 PM #7
some back pressure helps with torque. its like blowing through a straw vs. a papertowel roll. but alot of backpressure is like blowing through a pin hole in a piece of cardboard or somthing. ohh and tell the guy at the muffler shop that hes a moron. all cars need some backpressure to run efficiently.
12-14-2005, 06:17 PM #8mrdirtyz28Guest
thanks so how long do i have to keep it like this? i dont' have any money to buy another muffler anytime soon.
12-14-2005, 06:34 PM #9
if you need a cheap alternative, awnser me this, do you have the stock system? with the muffler in the very back mounted sideways behind the axle? if so get a 15 dollar cherrybomb and some muffler clamps and clamp it up for the time being. it will sound like shit but it will be serving the purpose untill you can get a good one in place.
12-14-2005, 07:25 PM #10mrdirtyz28Guest
i think ya'll are getting the wrong idea.all he did was take off the muffler and ran the exhaust straight to the back of my car.it's called straight pipe is that bad?
12-14-2005, 07:29 PM #11
no theres nothing wrong with that. no exhaust would be a problem for long term use.
12-20-2005, 05:56 PM #12redls1birdGuest
thanks ss, its one of my favorite pics of my car
12-20-2005, 06:05 PM #13
12-21-2005, 08:09 AM #14
if you have the stock manifolds y pipe and cat then you already have more than enough backpressure. Running headers to no backpressure can possibly burn your valves up after losts of use. its always good to have some sort of backpressure to creat exhaust scavenging which will in turn flow better than straightpipe any way.Borla XR-1 energy bushings UMI B&M Spohn suspension techniques eibach edelbroc K&N Richmond Eaton F.A.S.T FlashTuner NGK MSD SLP J&M - I owe it all to my mentor- my dad.
12-22-2005, 06:00 AM #15
What about the stock manifolds and a race muffler. Is that ok or not worth time. Cause isn't that all the loud mouth kit is, just a race (tube) muffler and then tips out the back. Just wondering. Want better sound but can't do 900 dollars for borla exhaust.
12-22-2005, 06:33 AM #16Originally Posted by R&L'scamaro
12-22-2005, 08:43 AM #17
anything with a muffler is ok. headers with an open y pipe may be ok but not for long period use. if you got stock manifolds and an open y you shouldnt have a problem. headers with a catted y and a muffler dumped is fine.
12-26-2005, 09:14 PM #18Bombguy99Z28Guest
You don't need mufflers. Backpressure being good, in any amount is, well, false in todays engines. You need velocity, sometimes running too big of an exhaust will slow velocity down, but there is absolutely no reason to ever want 'backpressure'.
The muffler shop guy was correct.
I gained 5-8rwtq across the board running a cutout without cats in an otherwise basically stock application. Now, slapping longtubes, no cats, and no muffler on a near stock application, yes, you will lose power down low.
12-27-2005, 08:52 PM #19mrdirtyz28Guest
04-20-2006, 02:34 PM #20
- Join Date
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Black on Black
- 2000 Trans Am M6
What about stock manifolds, ory pipe and a muffler? Is that ok?
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