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So one of my trusty LS6’s decided it didn’t want to live a long and happy life. Instead of pulling it to repair, I’ll move on to the planned LS7 build, a bit ahead of schedule, and fix this one later.
Torquer 116 looked good until I saw the 110. Definitely not looking for an aggressive idle, though it sounds good. I want something that is capable of at least 575whp with the mods below, without sacrificing drivability. Not planning on exceeding a 6500 RPM rev limit.
TFS gen X 260 LS7 heads
ported MSD intake/LS2 TB
11:1 CR
1 7/8 LT headers
Vararam CAI and other supporting mods
I’m not sure how relevant this is, but it’s a build for a c5. This is here since it’s an LS7 based engine. The Torquer cams have been out awhile, and it appears there has been quite the learning curve in the aftermarket with LS7 cams and drivability (still have a BNIB QM600 cam I’ve had now since 2008 on the shelf). Any newer/better cams out now? Anyone try the BTR stg 1 V2 LS7 cam yet?
any cam that has stock-like drivability down to idle, that adds to the midrange TQ and extends the powerband is worthy of my attention.
I have an LS7 in a C5, wet sump. If you're bound and determined to keep revs to a 6,500rpm limit, you'll have one Helluva time hitting 650+ crank hp NA, which is about what it would take to get 575whp. My .02.......
It was just a guideline. If it goes a bit over on the RPM or falls a few hp short it’s ok… as long as the drivability is where it needs to be.
OK, I got it. As you probably know, there are professional tuners, and guys who tune. By finding a really good professional tuner, they can make a fairly aggressive cam have better driveability than a so-so guy who tunes can get from a very mild cam. I have a 17° overlap cam in an A4 C5. Yes, it's an LS7, which the increased displacement helps tame. But I think most guys here would be very surprised at how well it drives. But were talking a 112° LSA Cam Motion cam, 232°/250° duration cam, .600+" lift. If youre anywhere near Michigan, Motor City Speed near Wixom, MI, is where I had my car tuned. Billy Briggs Racing Engines is the owner/engine builder. Rich is the owner/tuner you need to talk to. He is really good, doing this for 20+ years....
I had a QM600 cam in an LS7 many years ago
with basically stock intake manifold, and mildly cleaned up exhaust ports on the heads with long tubes.... it was a fun setup with 11.25:1 compression (91 octane) and went 111mph 1/8 and 138.3mph 1/4 best in my little 2900 (with driver) RX-7 and T56. It only dyno'd at 522rwhp/472rwtq but as you can see it probably made a little more power than that.
Cam technology has come a long way even in the past 3-4 years. BTR V1 or V2 would be a good pick. You should run 12:1 compression as 93 octane supports that (Pretty sure you have it in your area)... An MSD Atomic intake is worth from what I've read/heard/seen about 25rwhp+ over the LS7 intake. Every point increase in compression is 3% more "free" power (11:1 to 12:1 etc).
What else is done to the car? Debating cams rn, leaning more towards drive ability instead of peak power
what I outlined. Good heads, nw 103 tb, ported msd atomic, kooks headers. It’s a great cam in all honesty. Very driveable and amazing midrange power. Here’s an initial graph. The final one is more smoothed out and slightly different power but the same for the most part.
Problem with LS7, is not the cam, but intake manifold not allowing it to breath past 5.8K instead.
Solve the breathing problem, and motor will make all the power you need, since already a torque monster off the bottom to break the rear end at will; one you turn off TM in the tune.
Problem with LS7, is not the cam, but intake manifold not allowing it to breath past 5.8K instead.
Solve the breathing problem, and motor will make all the power you need, since already a torque monster off the bottom to break the rear end at will; one you turn off TM in the tune.
I have a msd. Plenty of manifold. It’s the cam design.
I like those number, exactly what I’ll be looking to achieve once I get my C6 Z06.
Originally Posted by Burntoutaccountant
what I outlined. Good heads, nw 103 tb, ported msd atomic, kooks headers. It’s a great cam in all honesty. Very driveable and amazing midrange power. Here’s an initial graph. The final one is more smoothed out and slightly different power but the same for the most part.
These specs are almost the same as the later, 570chp LS7s. I think the GM cam was/is .590" lift, 227°/242° duration, on a.....DAMN.....I wanna say ground on a 116 LSA......
2024…mild/sleeper LS7 cams that preform!
