southofHoustonVette

Now that’s what I like to hear. Pretty nice improvement

HOXXOH

What you see on a dyno sheet, doesn't always show up on a timeslip. A whole lot of people with bolt-on mods have low 400 to 440 HP dyno sheets and high 11 second 120 MPH timeslips. My last dyno pull was 394 HP and surrounded by lots of high 10 second 125+ MPH slips. The point being, while higher dyno HP may soothe your ego, it doesn't mean your car is faster.

JerriVette

Personally 40 to 50 rwhp shown on dynotunes sounds like a tuner shop playing with the dynotune numbers, for an air intake , headers, exhaust and a tune...(400 to 440 rwhp from air intake, headers and a tune? )

in my opinion that sounds like it would include at least an aftermarket cam....

i could be wrong so for those that get that please take this as my opinion.

Headers are cool mod as is a tune and air intake...


just don't expect too much.

thats all I am saying.

for anyone in the tens...your doing awesome....thats the real deal.

C5Natie

I dont know how familiar you are with tuning and the LS3 engine but, after building, tuning and modding many of them myself I can assure you that a 40hp gain is not uncommon with the right set of headers, x pipe, intake and a proper tune on a manual trans car. The LS3 responds great to these mods. Cam and header only LS3's hit 470-480rwhp easily.

HOXXOH

Familiar enough to see the track results of some of the experts in the field (Max @ Cartek & Doug @ ECS), who run 10.6's with a M6 H&C+++ LS3 and compare that with the 10.7's of a stock LS7 engine Z06 that dynos in the 450-455 rwhp range. Wouldn't you think if Max and Doug could easily get 20-25 more HP than a LS7, they wouldn't need heads, gears, etc to gain a mere .1 seconds? Why wouldn't GM dump the LS7 if it was so easy to get more power out of the LS3 with a simple cam and exhaust manifold change?

I'd be more likely to suspect the generous dyno you play with, needs a re-calibration.

damascus1986

echoing what some have said here about headers and tune they were my first mods made the car feel very different to say the least. you can prop open the radiator shroud to let in cool air and get 70% of what a good intake will do if you do go with a intake is look at vararam or halltech . i didnt feel much of a difference going from headers and tune to headers tune intake but tuner said he had to adjust my fuel trims by 6% and my tablet was reading more air passing by the maf at WOT. id do a intake on a modded car but stock it wont help much

C5Natie

I only stated a HP figure. If you wanna make those comparisons you gotta start talking power curves and torque figures where the bigger LS7 is another animal. You sound a bit green in this area though. You do realize that we're not talking about smog legal cam setups here right?

And there's way too many variables in drag racing to say this car with x hp ran this et vs another car with y hp.

It's a simple fact a cam and header only LS3 can make 460-480hp and this has been proven on various dynos by many tuners. So yeah you can make stock LS7 hp without many mods, torque is another story.

C5Natie

You're kidding right?
Maybe because a big camshaft and headers would never pass smog especially in states like CA 😂

Gilcane

I have no headers and 4 cats ...vararam cai and a chuck cow full tune . Including a tranny tune. Dont know what it will do on a dyno .. But on the street its chirping gears smoking tires and screams like it's getting raped ...Do yourself a favor call Chuck at Corvettes of Westchester

KW Baraka

1. Get the biggest long-tubes available for your car. EVERY before/after dyno I've ever witnessed or been told of by others who've witnessed point to large tubes having no negative affect on low-RPM torque.

2. Gears.....get some gears. I don't know what transmission you have because I'm not a 'vette guy, but if if the car has a manual, then I'd install some 4.10's for low-RPM kick-***.

Jus' sayin'.....

KW

timd38

Lots of great stories here! It was good reading!

0Chuck CoW

Love it! Thanks MUCH my friend!

Chuck CoW

4head

Yeah I think all that needs to be said here is post count doesn't mean anything. Spend your money on your car however you want. It's an ls3, there are tons of examples of ls3's in the world, both on the dyno and the 1/4 mile. Use that for your guide.