New LS1 Owners - Newbie Tech - No Muffler?




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crapyboy750
09-24-2007, 05:32 PM
Will not having the muffler on my exhaust cause any problems to my car? Will it increase or decrease horsepower and gas mileage?


turbowhistle86
09-24-2007, 05:41 PM
the smarter thing to do would be to have a cutout placed in the I pipe, so you can be loud when you want to, and quiet when you need to. Should feel a little from the seat o' the pants dyno, should change fuel economy too much either way.

hndakilr
09-24-2007, 06:06 PM
So I Take It You Like Tickets And Cops Fking W You??? Do You Know How Loud These Cars Are Without Mufflers?


hndakilr
09-24-2007, 06:07 PM
+1 For The Cutout

98_WS6
09-24-2007, 06:13 PM
They sound badass with no muffler

slow1999blackz28
09-24-2007, 06:23 PM
I wouldn't just take off my muffler that would dump all the sound under the car and make a noisey cabin all the time a cut out is a good idea though if you want it loud and quiet or you don't have enough money for a cat-back.

crapyboy750
09-24-2007, 07:13 PM
I have had my muffler off for about a week now. But im just asking if its bad for the car or gas mileage. And no i havent been pulled over for it yet.

4mula4ever
09-24-2007, 07:18 PM
I have no muffler on my TA and had tips welded onto in and I love it. Sounds a lot atter then stock.

crapyboy750
09-24-2007, 07:35 PM
hell ya it sounds alot better but do u think it will fuck anything up?

180ls1
09-24-2007, 07:45 PM
i dont believe so it should be fine i know with my jeep 4.0 i ran no cat and no muffler and it did not make enough back pressure. but your car should be fine no different then the guys that drive around with their cutout open. i know the slp or bullet exhaust is almost like having no muffler and they dont cause any problems so i would bet that you are ok. there is a guy on here that has his z straight piped you could try to find him and talk to him

crapyboy750
09-24-2007, 08:08 PM
what is the back pressure used for?

jetlag
09-24-2007, 08:16 PM
If you have headers...I would had least put a straight through muffler on. On my old Z28 I used a DynoMax Bullet.

00blacksstallion
09-24-2007, 08:57 PM
+1 for the cutout

LrngCrv
09-24-2007, 09:48 PM
what is the back pressure used for?

It is for resisting your V8s exhaust to lower hp so that the other cars on the road have a chance.

tylert14
09-24-2007, 10:05 PM
I just bought all the stuff I need to build my straight pipe true duals setup. You'll be fine. LOUD, but fine. ;)

crapyboy750
09-24-2007, 10:11 PM
It is for resisting your V8s exhaust to lower hp so that the other cars on the road have a chance.

lol i like that answer.

manniehyphy
09-24-2007, 10:23 PM
i have stock manifolds, gutted cats and an SLP loudmouth II with gutted resonator and i ran a 11.86 at 119.7 with spray and drag radials. as for gas mileage... i feel it all depends on how you drive your car. btw... ITS SOUNDS NICE!!!

RedRocketZ28
09-24-2007, 10:40 PM
It's not going to hurt anything to run without a muffler. On my LT1 I ran around with the cutout open all the time. Would be the same thing as not having a muffler.

180ls1
09-25-2007, 12:14 AM
what is the back pressure used for?

well i am not to sure about backpressure otherwise you would see top fuel cars just run bare block with no headers what so ever, but i know every motor needs a little at least.