jeffbrown13

A dandy of a first post. Background, car is 2011 Camaro SS @ 4060# w/ driver, 6L80E, LS3 conversion, cam, WCCH ported heads, cai, 1-7/8" LT headers and HF cats, 4000 stall Circle D converter and 3.91 rear gear. I want to stay NA and full weight, don't want to gut the interior or cut the car up. Tires are 305/45R18 MT Drag Radials and they dead hook now. Times now are in the 11.30s and 11.40s from zero to 2000 DA, with 60' times in the low 1.60s. Trap speeds are 118 to 121 depending on temp and DA. Dyno sheet about a year ago after cam and heads install showed 477 RWHP and 437 FT-LB Torque. I'd like to get into the high 10s, but not sure it's possible. Suggestion to date is to put a VVT cam back in to raise low end torque and high end HP, but I'm not convinced this will be enough. What do you guys think?

speedtigger

iTrader: (16)

With a 4000 stall and a 6L80 with a 3.90 gear it seems your 60' times should be at least 1 tenth better. Which converter: 4C or 2E? Also, cam specs?

jeffbrown13

That's the same thing my tuner said. I even changed from an FTI 3600 stall to a Circle D 4000 stall, since that was what the tuner was running in his Camaro with the 6L80E and 3.91 rear gear. 60' times improved some, but the best I've seen in 50+ passes has been 1.606. He thinks the problem is the low end torque curve with this cam. 4 tenths is a lot to pick up with just a VVT cam swap, but maybe the chances are good. I would try it if the odds were 75% - 25% in favor of success. But I'm not smart enough to know what the odds are.

Actually, I believe the converter is a 1E, I know it has the E stator.

Cam is 239/247 0.624"/0.624" 114 +4

PS: Found packing list on converter and it says "1 6L80 LS Pro Series Stage III 245mm 1E"

speedtigger

iTrader: (16)

Wow. That is a lot of Camshaft for square port heads in a heavy car with 1E torque converter.

I have a 4C (3800-4000) torque converter and only a 2.74 first gear and the same 3.90 rear gear. At #3780 my car will 60' 1.52 go 11.Ohs and trap the same 118-121 depending on the weather. My camshaft is a much smaller 226/234. If that thing were mine, I would be tempted to go to one of Tooley's LS3 Stage IV or Ticks LS3 Street Heat Stage 3 cam (I think they are the same unit). They are 233/248 on 113+5. A lot of testing went into those cams on LS3/L99 engines.

TTur1996

Spray it, your there. Lol

senicalj4579

iTrader: (41)

Theres plenty of info on here to get your answer. I got mine 10.9. mods in sig

jeffbrown13

Does your car weigh 4060#?

jeffbrown13

Best 60' with the FTI 3600 was 1.691, so I did gain a little with the Circle D, just not enough.

If I put another cam in the car it will be a VVT cam. IMHO, I have a better chance seeing high 10s with a VVT cam. I wanted one first time around, and let the installer talk me out of it. My mistake, I should have stood my ground.

senicalj4579

iTrader: (41)

No it was 3450-3500 raceweight but I don't have a ls3 or a 4k stall either so take it FWIW I guess. That's a heavy car you have there!

Kingc8r

iTrader: (21)

Can you post up a picture of your dyno graph? I'd imagine that cam is more a peak power top end cam by the specs and what your tuners said. I would maybe contact a cam guru and swap out to a cam that will be better suited to moving your car at that weight.

As Speedtigger said he has a smaller cam but I'd imagine his car probably makes more power in the lowend and midrange over your cam.

60fts aren't terribly off. When launching the car how are you stalling the car up? Off idle, very little RPM or as much as the car will allow? Have you played around with the stall to find out what it likes?

jeffbrown13

If I was at your weight I think I would be there. These 5th gen Camaros are heavy, unless you gut the interior and strip a bunch of other items.

jeffbrown13

I've tried a bunch of different launch RPMs and found my best 60s came when I flashed the converter from 1200 - 1400 RPM.

Before and after dyno sheet is attached.

Kingc8r

iTrader: (21)

That cam aseems to be making a decent amount of torque down low but then again I'm not too familiar with what most cammed LS3's put down hp wise under the curve. Did your tuner say how much it should pick up going to the other cam?

What intake do you have on the car? The cats are eating a little bit of power as well. Getting to your goal is going to get harder now that the weather is getting worse as far as drag racing goes.

jeffbrown13

You're right about the weather. I'm planning ahead to get it ready for fall and winter air.

Tuner feels that there is a good chance a VVT cam will get me there, but what odds in "a good chance"? If I don't get there I'll be really disappointed and might as well stay where I am. He said he feels I should be easily in the 1.5s on the 60' and have slightly over 500 RWHP with the stage III VVT cam. Could go stage IV, but that means flycutting the pistons.

The intake I have on the car is a Vararam Tune model. I did a lot of logging with the CAI and Vararam to decide which I was going to keep. Vararam won. Nothing real scientific, more random, but here is what data I was able to collect on the two intakes on my car.

PS: Here is a dyno sheet of a VVT cam on a similar setup, except no head work.

Pro Stock John

iTrader: (34)

Need a better 60 ft (Hi Jeff), so need

(a) more converter
(b) look at what that cam, that's a lot of intake duration it's not going to be an animal down low
(c) keep playing with shift points and/or
(d) pull out passenger seat and stuff in the trunk for 80 lbs loss.

jeffbrown13

Hey John,

I know too little about a cam, let alone be knowledgeable enough to read the specs. I really have an itch to go back to a VVT cam that will be enough of an animal down low, but I don't want to give up anything up high. Rhino thinks it's the way to go, and I have a lot of respect for Rhino, just trying to convince myself to pull the trigger. I have a while to make up my mind, since good air down here is gone until the Fall. I always have to be tinkering and trying for a faster time, at some point I'll have to stop.

I hate to start gutting the interior, except for the rear seat which us old folks couldn't possibly use anyway. I'd also like to avoid going with more converter so my wife won't refuse to drive it when I want to go to SGMP in Nov and Dec., since she's my highway driver.

Decisions, decisions, decisions . . . . .

Pro Stock John

iTrader: (34)

I presume Ryan thinks that the car leaves soft because the cam's power band is pretty elevated?

These cars are HEAVY.

jeffbrown13

That is exactly what he thinks, and I can see his point from the little I know.

Pro Stock John

iTrader: (34)

I'd think running that much intake duration you'd need more converter to get the car to run stronger.

jeffbrown13

I didn't know what I was doing when I had the cam installed and basically let the installer use his best judgement on what to put in the car. He did know that I was drag racing the car and that was my goal, and he had a lot of experience with LS motors and Corvettes/Camaros. I still don't know what I'm doing when it comes to cams, so I'm going to let Rhino pick the cam, and since my car is similar to his as far as gear and transmission and he has been tuning it, he should be able to get me a good VVT cam that will put a smile on my face.