ben jamin

I've been reading a lot of posts. Most people are talking about cams for racing applications but I need something that makes good power down low also. I do most of my driving around 3000rpm driving up steep hills. I guess I need a cam that has good torque and hp in that range. A little bit about my setup. I've got 243 heads ported, ls6 intake, 90mm edelbrock throttle body, free flow exhaust, aftermarket Mefi computer which I'll have to retune on a dyno, 36lb injectors. My ls1 is in a sandcar so there will be no smog. My transmission is a 4 speed manual with straight cut gears. Any help will be appreciated.

99Bluz28

iTrader: (35)

What's the chamber size(or compression ratio) on your ported 243 heads, and how high to you plan on spinning the motor?

ben jamin

chambers are 63 or 64 whatever's stock. I just measured them with alcohol and it was 63 1/2 cc but my measuring device isn't perfect.

ben jamin

How high do I plan on spinning the motor? Right now I have my rev limiter set to 6800rmp but I may set it higher when I have it tuned. Maybe to 7200rpm. But I'd like to keep it safe.

99Bluz28

iTrader: (35)

Okay, so how high(rpms) do you need the HP to peak before rolling off?

ben jamin

I guess around 6500, Ive hit my rev limiter once or twice but I would like realy good power at 3000 rpm

99Bluz28

iTrader: (35)

For a off-the-shelf grind, CompCams 54-455-11 (215/223 112lsa+5, lift .604"/.610"), or the Cam Motion C33-664 (216/220 112lsa+4, lift .561"/.561").
For a custom cam a Comp Cam 217/222 110lsa+3 (lift .605"/.566") should work good for you. Lobe #s for this cam are 13094 (intake) and 3714(exh.) You're look at your HP peaking roughly around a 5600-5700 rpm with these three cams so I wouldn't set the rev limiter up higher I'd probably drop it down to about 6400rpm, no gain in letting it rev higher.
I'd also get a few recommendations for some of the sponsors(Tick, EPS, Futral, etc..), then make you choice.

SNLPerformance

iTrader: (15)

So you have a LS6 intake with LS2 snout and when you say free flowing exhaust, open headers? What size primaries exactly? A bump in compression with milling or a thinner head gasket would help low end torque as well, I also would consider a Fast 102 LSXRT.
Feel free to call me to discuss details, Chris 817-750-2000

ben jamin

LS6 intake I picked up a 90mm throttle body but I don't know if I should use it. I have a stock one also. I don't know what size primaries I have. Tell me how to measure them and I can let you know.

SNLPerformance

iTrader: (15)

Good talking to you on the phone, I'll get you taken care of when you're ready to order.