F0x Slaughter

The stock TB and manifold will support your current setup for sure.

That cam is a good match to those heads. Assuming Lloyd spec'd it for you?

The car is tuned I'd say?
Do you know what the WOT AFR is?

You should definitely be making power past 6000rpm.

Did you degree the cam when installing?

v8vette84

No I did not degree the cam. I never have, i know I should but i just never have. Car is mail order tuned by Madtuner. I told Lloyd the type of heads I was looking for and he recommended that cam considering I have forged rods with ARP bolts. I don't know the WOT AFR.

F0x Slaughter

I'm wondering if your intake can't keep up with the air demand at the higher RPMs.

I'm assuming you had MadTuner do the tune after the head and cam swap?
I heard good things about him, even though obviously a mail order will never be perfect.

On a side note how are you launching the car? It does seem to bog, need to work on the launch.

v8vette84

I'm revving out to around 4k then not dumping but dropping the clutch hard and the car seems to slip the clutch on it's own as I get going. If I dump the clutch she just spins.

Yes it was retuned for the heads/cam swap.

F0x Slaughter

Have you tried revving and slipping at different RPMs? Obviously thats causing her to bog on you. There will be a perfect RPM and clutch speed that will allow you to take off perfect.

I would look at that intake setup. I think she might be choking you out on the high end.

v8vette84

I have tried at lower rpms. It only seems to launch worth a crap if I bring the rpms up high and slip the clutch real hard. I will take a look at the intake tomorrow to see if I can modify it.

v8vette84

Well I decided to take a look now. I have basically no options to modify the intake. I would have to cut the hood, which i don't really want to do. :/

trilkb

iTrader: (4)

power dropping off could be valve float or fueling issues. Was the car dyno tuned? im sure that would tell you alot. Alot of people run beehives, Im personally glad that I cant. My cam eats them im told. Do you know what lift they are good to and open pressure?

v8vette84

.625 I believe they are good too. The open pressure is 367 lbs. It may not be exact data but it's been awhile since I bought them. The car was mail order tuned, not dyno tuned.

v8vette84

I'm going to design a new intake that should draw cool air from in front of the radiator. I hope this setup will help at the higher RPMS.

v8vette84

What size intake tubing should I use? Factory is 3" I believe. Will that be sufficient?

turtle93

Here is my DIY cold air intake I built for my 93 vette will do some data logs soon to see if this or the ram air bumper/plate set up is better

turtle93

Sorry her you go http://www.smokinvette.com/corvettef...ad.php?t=34801

v8vette84

So I decided now that the car is away for the winter I can start tinkering again. Looking at a random calculator it says running a 12.4 @ 114 means I'm making around 372 CRANK hp. From what I have seen most ppl with similar setups are right around 400 WHEEL hp... Are my track times significantly slower than another car dyno proven to have 400WHP? The Vette probably weighs 3200-3400 with me in it I would think. (Have not weighed it) What do you guys think? I'd like to have it dyno tuned but no one near me does LTx dyno tuning.... I should have datalogged more but once I started noticing it the season was too far in to mess with the car as I wanted to drive it! haha

bufmatmuslepants

iTrader: (3)

You are definitely down on power for what it should be running, or you are running in 4000+ DA. That setup should run 11.5s all day at sea level. That's a big cam for those behives, I would step up to a nice dual spring and start shifting around 6600rpm. I definitely think that is your issue.

transbird95

iTrader: (4)

What calculator did you use? Don't get caught up on what the calculators say either.

What was the density altitude?

draggin97s10

iTrader: (2)

It's not down on power.....Get a some gears in it and drag radials and you'll be surprised.

guppymech

iTrader: (7)

As the two previous guys said don't get hung up on a number. You're doing fine. Do as was recommended earlier in the thread. Some 4.10 gears will help the engine get into the power band quicker and have a good pull in 4th through the traps. I would look into why its laying down above 6k though, maybe your air intake setup or the valve springs are not working out with the cam.
Also as you know M6s are hard to hustle down the track and generally don't ET as well as automatics.

sweetbmxrider

iTrader: (13)

That mph seemed low to me but everyone here seems to know better.

NufNuffZ28

iTrader: (13)

One thing to look at is the spectre filter. I know you're NA, but I LOST 3 psi during the summer by putting a spectre 4" filter on my Vortech! Removed it and my boost was back...