My Chronic Mod-itis is acting up again (Headers + Cam results inside)

HushH · #1 (**permalink**) 06-01-07, 10:27 AM

Just got the V back from the guys at Vengeance Racing. First, let me take a moment to thank Ron, Mike, and the rest of the guys there for the great work they did and putting up with my constant harassment on when the parts would be in. They are hands down the best performance shop in the area and I highly recommend them for absolutely any LS engine work you want done.

Now on to the fun stuff. Here’s a list of what was done:

- Kooks LTs + Hi-flow Cats
- Vengeance Custom Cam
- Comp Pushrods
- Comp Springs
- Ported TB
- ASP Underdrive Pulley

Went to pick up the car last night. First thing Ron did was crank her up for me. My jaw just dropped. This thing went from having a nice rumble to…well, my wife probably described it best when she said, “Your car sounds like a Harley now.” I’ll try to post up a sound clip shortly. I’ll just say that I probably won’t be listening to the radio anytime soon.

As far as drivability goes it is nearly stock-like save for taking a few seconds for the RPMs to drop on clutch engagement. Cruising at low RPMs is no problem at all. No bucking or surging whatsoever. And that’s no small accomplishment considering this is not really a mild cam. Kudos to Mike for another amazing tune.

I haven’t had a chance to really stomp on it yet, but you can definitely feel a difference. Tires brake loose much easier. I was really surprised at the torque gains with this setup as well. Car is making ~370 ft-lbs at 3k RPMs. That’s about 50 more than it was before. Of course the larger gains are in the upper RPMs. I picked up about 80hp at the wheels at 6k RPMs. Again, I couldn’t be happier with the results and I’ll post more once I’ve had the chance to really push it. Anyone on the fence about doing a cam should just go ahead and pull the trigger. And I highly recommend giving Vengeance a call.

Final numbers and graph below. Nice torque “curve”.

lunarx · #2 (**permalink**) 06-01-07, 10:36 AM

That is a nice torque curve.

Do you have a baseline graph?

HushH · #3 (**permalink**) 06-01-07, 10:41 AM

yeah, but my son ran off with it this morning to show his friends. i'll post it up this afternoon.

ETA: baseline numbers were 344/343

RamAir02 · #4 (**permalink**) 06-01-07, 10:43 AM

Nice numbers, would you mind revealing the specs of the cam? I'm guessing its decently large...maybe low 230s duration and just over .600 lift or so? Also what LSA?

HushH · #5 (**permalink**) 06-01-07, 10:49 AM

I just noticed they have the cam specs listed on their site, so I don't see any reason not to post. It's their VRX6 cam: 238/240 .605/.609 113

RamAir02 · #6 (**permalink**) 06-01-07, 11:11 AM

nice cam...not TOO much lift but not TOO little either

You should get good life out of your valve springs. Which ones did you go with? Comp 921s?

vettethret · #7 (**permalink**) 06-01-07, 12:19 PM

Nice numbers. I am still on the fence about the MS4 cam which is 239/242 on a 111 lsa. I want it, everyone says no. I'm giving Vengeance a call!

vettethret · #8 (**permalink**) 06-01-07, 12:30 PM

Hush, what exhaust are you running?

**The Tony Show** · #9 (**permalink**) 06-01-07, 12:38 PM

This thread is worthless without sound and video.

HushH · #10 (**permalink**) 06-01-07, 01:10 PM

Quote:

Originally Posted by RamAir02

nice cam...not TOO much lift but not TOO little either

You should get good life out of your valve springs. Which ones did you go with? Comp 921s?

Comp 918s. I was a little worried because they were only rated to .600 lift and I'd seen a few failure reports lately, but Ron said they were good to .625 without a problem and he has installed literally thousands of them with no issues to speak of.

HushH · #11 (**permalink**) 06-01-07, 01:15 PM

Quote:

Originally Posted by vettethret

Hush, what exhaust are you running?

Corsa. The combination of Corsa, Kooks, and cam sounds amazing.

Quote:

Originally Posted by The Tony Show

This thread is worthless without sound and video.

It's coming.

dqw1 · #12 (**permalink**) 06-01-07, 01:35 PM

Please don't make me add a cam. Don't make me do it. Bet you have a sh*t eating grin on your face. You get any work done today or just putting down smoke?

RamAir02 · #13 (**permalink**) 06-01-07, 01:39 PM

Quote:

Originally Posted by HushH

Comp 918s. I was a little worried because they were only rated to .600 lift and I'd seen a few failure reports lately, but Ron said they were good to .625 without a problem and he has installed literally thousands of them with no issues to speak of.

Hopefully the 918s hold up for you. I've heard some horror stories about them, but there are also many people running them with pretty high lift cams. The 921s are great springs, but are SO expensive. I had Patriot Gold dual valve springs on my Trans Am with the MS4 cam, but then upgraded to Patriot's newer spring ( I don't even know if they have a name ). They sent me them for free when they finished testing on them.

Luna. · #14 (**permalink**) 06-01-07, 02:04 PM

Very nice torque curve!!

HushH · #15 (**permalink**) 06-01-07, 02:09 PM

Quote:

Originally Posted by dqw1

Please don't make me add a cam. Don't make me do it. Bet you have a sh*t eating grin on your face. You get any work done today or just putting down smoke?

D,

I told Ron yesterday you'd be back for one. He said, "yeah he will." Trying to catch up on work today but I'll definitely be out "breaking her in" this eveing.