Finkledbody

My buddy has a 97 corvette a4 with 60k miles. He recently did a lid, full exhaust w/cats, and a torguer v2 cam (232/234 .595 .598 114lsa) w/supporting mods; springs, retainers, pushrods. Hes still on the stock ls1 intake and heads. After getting everything installed he went and got a dynotune and put down 327 whp/341 wtq. It was roughly 80 degrees out and 250' elevation. I don't know what kind of dyno he used nor how many pulls he did for the tune.

My question is, if he upgraded to the ls6 intake and got the 01/02 ls1 heads, would he see a 25-35 rwhp increase? I only ask cause hes pretty disappointed with the results and I'm thinking the older heads and intake are restricting his flow leaving a few ponies on the table.
What do you guys think?

Thanks for any and all input

Jtm2085

iTrader: (1)

That is really low for his mods. Hopefully it was a mustang dyno, even though the numbers are still low. Does he have a stall with the cam?

ULTIMATEORANGESS

iTrader: (4)

way low. is it throwing any codes?


if it was me id get a FAST setup and some nice heads.

09camaro383

iTrader: (2)

that is low!!! just double checking what do you mean by full exhaust? headers too!! like someone else said his best choice is a fast combo or at least a ls6 intake and a ported TB but i will throw in some 243 or 799 heads and that will give him the 400rwhp with a 90/90 setup

blackfang

iTrader: (2)

Mustang dyno or something has to be wrong.

Finkledbody

Hes still on the stock stall

Nope. Car runs great.

Yup, he has long tube headers w/cats and a catback exhaust system.

It does seem to be low but I really think the intake and heads are holding him back. I'm going to ask which dyno he got it done on but til then. More opinons welcome.

StoleIt

iTrader: (3)

That's pretty low for a car with an after market cam, even if it's an A4.

Like someone else asked, was it a mustang dyno?

I'd check the tune as well.

ULTIMATEORANGESS

iTrader: (4)

if its running ok take it for some track runs and give us some times.

twitchtwice

iTrader: (12)

yeah, doesnt matter what the dyno says. if he runs the times he should with those mods then he is fine.

RPM WS6

iTrader: (3)

I don't think so. The older heads and LS1 intake won't hold him back *that* much. I made 360rwhp through a cammed '00 LS1 Trans Am with stock heads & LS1 intake, plus A4 trans and unlocked stall. I had headers too, but they were mids (although I had an ORY). The IRS will eat more power than an F-body solid axle, but I had a very small cam (221//.558 single pattern).

95z28onjuice

iTrader: (-2)

is that a typo

David_viny

Is this a white one? I've seen a white one run at Oxford Plains Dragway that was unfortunately running pretty slow, and didnt spin or anything. My times were better and I was 100% stock.

HoLLo

iTrader: (17)

I got a 225/229 .580/.590 114 cam with LS6 intake, longtubes, and cutout. Did 359/346 on a Mustang Dyno.. Just for comparitive purposes. This cam is slightly smaller than the Torquer V2

ds98formula

iTrader: (3)

Very low numbers that's bolt on numbers my car dynoed same hp and 7 more tq with just a lid and headers nothing else with 124000 miles

RPM WS6

iTrader: (3)

You two have M6s, your numbers are not comparable at all.

However, it's still true that even for an A4 the numbers are very low.

Finkledbody

Prior to the mods he ran a best of 13.5. He just ran a best of 12.9 a few days ago.

This is what I wanted to hear more or less. I'm going to talk to my friend, maybe he just needs a full tune-up cause it just seems way to low.

Is what a typo?

Yeah. My z is bolt ons only and put down what ya see in my sig.

fccs

iTrader: (26)

holy **** is that low... I put down more with just headers then that! Something is wrong there.

flintwrench69

iTrader: (11)

Why would you do that, then wonder why its down on power?






Yup, he has long tube headers w/cats and a catback exhaust system.

Theres a noticeable difference with an LS6 intake about 10-15 whp over the stock one but I cant say for sure about the heads. I heard the 241s arent much better than the older castings. Some A4s will dyno low but run strong numbers at the track, but still with that cam it should be much closer to 400 whp.

therealthatguy

iTrader: (23)

make sure the throttle body is opening all the way!!

RPM WS6

iTrader: (3)

What was his trap speed? ET doesn't tell nearly as much about horsepower as MPH.

Not a bad idea to check this. Something is definitely going on with that car, so might as well check the basics before getting too worried.