eduardo

i installed my headers but im basically running my exhaust straight from the headers with some 2foot extended pipe from each side.

Is this causing my car to feel slow by not having the pipes merge together?
Does back pressure really make that much of a difference?


The custom ypipe will be installed this Tuesday along with the rest of the exhaust.

Titanws6

iTrader: (35)

Umm yeah especially down low tq will be a loss, but higher in the RPMs it should feel stronger. Maybe once the full exhaust is installed you will feel the benefits

Xtreme864

iTrader: (15)

my car felt like a v6 before I got the exhaust installed and just ran straight pacesetters with 18" straight pipes. New exhaust=whole new world. Get some backpressure on it and you'll feel your power gains.

eduardo

Yea, so no racing today until I get everything sorted out this Tuesday.

pewter_z28

iTrader: (5)

hey let me know how that works out. my brother just bought an 01 z28 with pacesetters and true duals, it seems slow. we were thinking backpressure is a big factor, since theres no H or X pipe and it's 3 inches all the way back. he's gonna have a mechanic look at it in a few days but sounds like the same problem you have maybe..

Xtreme864

iTrader: (15)

Just get some mufflers for it. Nothing too restricting like flowmasters, but get some moroso or magnaflow bullets, and dump em, and you'll get your backpressure, and your power.

NastyNate65

I worked with a kid who had LTs with cats right in the end of the collectors. with no h or x pipe. he never complained about power loss or anything. The cats must have created some back pressure unlike the straight pipes.

DSkyles

iTrader: (1)

It's also very possible that your new exhaust is loud as hell and tripping knock sensors which pulls timing.

Blk_Ws6

iTrader: (4)

^^^^Right, or like everyone else said LT'S are a over kill for stock LS1 ,Personally I think LT's are for H/C/I engines midetubes are better for a stock ls1.

Sales4@Texas-Speed

iTrader: (4)

It has been proven by dyno evidence time and time again that LT will pick up a solid 20-25rwhp over stock exhaust manifolds. Just look at the stock manifolds, they are extremely restrictive. Get a proper x or y pipe on that car and you will definately notice the pickup. IMO, shorties or mid tubes are a good way to waste your money.

djfury05

iTrader: (30)

ummm yea backpressure is a big deal dude.. you will need enough to close the valves properly.. FWIW I have headers ory cutout and magnaflow catback. When I'm doing 140mph or so the car seems to pull slower with the cutout OPEN. When it is closed it is a smoother gradual pull

eduardo

Well thanks for the response guys. I had a custom y pipe made and bolted on a magnflow exhaust. The car also has a manual cut out.
The car runs a hell of alot better. My car felt like **** without the rest of the exhaust. Took it to the track but my 1/4 mile time just got worse/slower.
Maybe I'm in need of a tune to make up for a different a/f ratio.

I think the car is faster but it might just be the sound it makes since it's louder.
I'll update after I get a frost tune.

And by the way my car does seem to pull better with the cutout closed as opose to open.