soslo

iTrader: (12)

Currently I have a stock exhaust with the exception of a QTEC cutout (which gained 12 RWHP when the engine was stock). How much HP/TQ am I leaving on the table by not having long tubes?

D Rock

iTrader: (7)

I picked up .4-.5 tenths on my cam only car. I also pickup up 20rwhp and 40rwtq with no tune.

soslo

iTrader: (12)

good Lord, was that the only mod? a half second?

silverZ98

iTrader: (6)

D rock did pick up those numbers with jsut the header swap. i was there for the before and after dyno runs.

soon im goig not install long tubes to replace my mac mids. wonder how much ill gain
with that swap.

if weather is nice you comeing out ot jerssy mikes saterday D?
Eddie

D Rock

iTrader: (7)

Yep , headers were the only mod. I was running constant 12.70s maybe a 12.6x every once in a while and the times droped to a 12.32 first run out and 2 12.2xS right after that. Also my mph went from constant 106s to high 110s. I am very pleased with my pacesetter headers.

Eddie, i'm gonna try to make it out there, Shaun(Formula99SD) is susposed to come over so we can work on his formie and i'll bring him out there if he wants to go.

Oh and they dyno numbers to be exact were 327.0 rwhp 306 rwtq before, 347.7 rwhp 348.5 rwtq after, keep in mind this is through an auto with a converter and a 12 bolt with a steel driveshaft. So more than likely you will pick up more hp and tq that I did.

Later,

Derek

soslo

iTrader: (12)

wow, that is great news...make me want to put some headers in...

jrp

iTrader: (16)

as D Rock has shown, when you go internal, your car needs to breath. i've seen people gain 30-35rwhp after a LT install when already having a cam only or h/c setup.

Damian

iTrader: (89)

Modding a motor internally without proper breathing capability is like building a house from the roof down....

silverZ98

iTrader: (6)

sounds good Derek
hope ot see yall out there, might give ya a call saterday get directions and ride over if that cool
late
Eddie

BADSZ28

iTrader: (39)

D Rock. Seems your car is a little on the slow side and low power for the mods. Nice gains with the headers though. Are you still running the LS1 intake? What kind of 60s you pull'n? What kind of air do you get? Are you tuned for the cam? Stall speed?
Just curious.

D Rock

iTrader: (7)

Hey man,

I've heard a couple of people say that his dyno is a little on the low side. A friend just had his car tuned and it put out 375, and only put out a little more than 350 on this dyno a little less than a week later.

I still have the ls1 intake, stock pully, non ported throttle body, so i'm still living a little bit on the table. The stall is a 3500, and i'm cutting 1.6x-1.7x sixtys, i've only cut a few 1.6s. I am not tuned for the cam, so i know i'm still leaving a little bit there also, and i'm very happy with how my car runs for the time being, and thats what matters anyway.

Later,

Derek

99 Formula

I had macs and went to long tubes and picked up 13 RWHP. But not a stock motor. Longtubes will help but will help a motor with internals much more.

jmX

I've done this twice, and both times I got 20-25rwhp and 4mph in the 1/4.

BADSZ28

iTrader: (39)

I figured there was some left out there. As long as your happy, thats all that matters. I will find out if I am happy after the 26th.

To stay on topic, it seems 20-25 is average.