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Here's our situation for those of you that don't know our combination.
2004 Corvette coupe: all bolt-ons - 1 & 7/8" ARH, no cats X-pipe, B&B Bullets, Yank SS4000, 3.90, Bogarts, Hoosier DOT 295/50/16 drag radials, UD pulley, Vararam, tune, ...
Race weight is around 3300 and NA it's made 372. Best ET is 11.58 @ 115 in good air (not great) with a 1.50 60.
The car also has a wet kit (with NANO) and on a 100 set-up it made 502. We haven't had a chance to sort out the progressive controller yet but once we get some runs I'm comfortable it will go mid-10s.
So here is my situation. I'd like to sneak in the 10s NA and 9s on nitrous (can up it to 150) in good air on a good track. How much HP will a cam add and can I do it with the stock heads and intake? I have a daughter in college so for now I don't want to invest in a $2K+ set of heads and I'd really like to have a 9-second car with the stock 241 heads. If the cam alone doesn't get me there I'll put a FAST (or MSD when the results come in) intake on it but I'm really trying to keep this as simple as possible.
Sounds like you'll need at least ~50hp to drop that .5 that is doable imo but not typical for cam only. Its probably gonna have to be a nasty max effort cam that will have a peaky power band. Hopefully some cam experts can chime in.
Crammed up engine with stock head = disappointment.... Cost $$ to go 9 seconds.... At the very least get a set of done up 243s to suit a bigger cam ....and an intake etc....... The 241s choke up pretty easily...
Should get you into the high10s with the right parts even though n/a C5s are rare that quick....then spray into the 9s....
Here's our situation for those of you that don't know our combination.
2004 Corvette coupe: all bolt-ons - 1 & 7/8" ARH, no cats X-pipe, B&B Bullets, Yank SS4000, 3.90, Bogarts, Hoosier DOT 295/50/16 drag radials, UD pulley, Vararam, tune, ...
Race weight is around 3300 and NA it's made 372. Best ET is 11.58 @ 115 in good air (not great) with a 1.50 60.
The car also has a wet kit (with NANO) and on a 100 set-up it made 502. We haven't had a chance to sort out the progressive controller yet but once we get some runs I'm comfortable it will go mid-10s.
So here is my situation. I'd like to sneak in the 10s NA and 9s on nitrous (can up it to 150) in good air on a good track. How much HP will a cam add and can I do it with the stock heads and intake? I have a daughter in college so for now I don't want to invest in a $2K+ set of heads and I'd really like to have a 9-second car with the stock 241 heads. If the cam alone doesn't get me there I'll put a FAST (or MSD when the results come in) intake on it but I'm really trying to keep this as simple as possible.
Thoughts?
Scott
We made ~57 whp on a mustang dyno with a cam swap.
I still have another max effort, 346 ci, cam new in the box that is still for sale along with the springs that are matched to it.
We made ~57 whp on a mustang dyno with a cam swap.
I still have another max effort, 346 ci, cam new in the box that is still for sale along with the springs that are matched to it.
I picked up 48 hp from a small Tsp 228 r and u/d pully. The car already had a fast 92 so that may have helped a bit. Your car put up some good dyno numbers for no cam. I am only at 385 with the cam and fast which was enough for a 125mph trap.
Edit: forgot that was with stock 853 heads.
Last edited by Txboatman; 06-01-2015 at 06:39 PM.
Reason: Heads
Am I reading this correctly? Your car put down 372rwhp and you pulled a 11.58 ET!? That is hard to believe if your car weighs 3300lbs but very impressive if true.
Do yourself a favor and put some 243 heads on it.
Heck, if I had a pair I'd do some bowl clean up, have my guy do a valve job and ship to you.
Big cam bad heads is a recipie for a turd. The power will all be upstairs.
Good heads smaller cam goes fast.
You're most likely correct here Ron but I'm stubborn. I really want to get it in the 10s NA and 9s on nitrous with the 241 heads. Just a challenge thing. Perhaps I'll send the heads to Phil or Chris Frank and have them done. I do suppose in the big scheme of things there is really no difference in doing it with 241 or 243 heads.
Am I reading this correctly? Your car put down 372rwhp and you pulled a 11.58 ET!? That is hard to believe if your car weighs 3300lbs but very impressive if true.
Yes, those numbers are correct. Made 372 on Stephen Covington's DynoJet in Longview, Texas (East Texas Muscle Cars - he does our tuning) and went 11.58 in Crandall, Texas at Dallas Raceway (since closed) at their Thanksgiving race with a DA around sea level. Our car has had some weight reduction (LTs, no cats, Bogart wheels, skinny fronts) but still retains the working AC, etc. Weighed the car without a driver and it was 3170 (1/4 tank of gas) and my wife drives most of the time (she is WELL less than 100 pounds lighter than me). Our car seems to be efficient and also seems to work well. Best 60' is 1.50 with a Yank SS4000, 3.90, and Hoosier 295 16" drag radial. I have every pass we've ever put on the car documented in our log book.
And there is a "cam" in the car now. It's a legal IHRA Pure Stock cam which means it has to have OEM lift AND duration and the springs have to have stock spring pressure. How much does this cam help? I'm not an expert but it's minimal if you look at the grind.
That's awesome! You must have an awesome tune in it. Just goes to show how important your tune is. Stock suspension? That is a great 60' for that kind of power. The suspension is definitely on point! When I eventually get my C5 I will be trying to achieve similar number with similar horsepower. Thanks for the information, and congrats!
That's awesome! You must have an awesome tune in it. Just goes to show how important your tune is. Stock suspension? That is a great 60' for that kind of power. The suspension is definitely on point! When I eventually get my C5 I will be trying to achieve similar number with similar horsepower. Thanks for the information, and congrats!
Thank you. Suspension is stock other than the front sway bar removed and LG drag spindles to be able to run 16" wheels. OEM shocks, etc. and nothing added or done. Stephen does a good job on our tune IMHO and spends a lot of time on the car both on the dyno and road testing it when we go see him.
05-22-2015, 09:45 AM
How much HP gain from a cam?
