I have an LS-3 that I'm preping to install in my 67 Camaro.. I have two cams available to me and I'm trying to determine if one of these will suit my goals.
Cam 1 - 227/235 639/646 on a 114lsa
Cam 2 - 227/239 612/612 on a 112+3
I've been doing a lot of reading to understand the specs and how it translates to drivability and power curve. I think either will work but not sure what the trade off's will be.
My setup is pretty standard, stock LS-3, CAI, mid-length headers, 6L80, Yank 2800 stall, and 3.91 gears out back.
Primary goal is for the car to be fun as hell to drive, occasional autocross and occasional drag.
I'd go with #2 based on lift specs. Unless you want to invest in some new rocker arms, the stock LS rockers don't work well with high lift cams....under 0.620 your good. If the motor is EFI, the 112 degree int/exh lobe separation is getting a little tight, hope you know a good tuner and if your running a stock LS3 intake....move the MAP sensor source to the rear of the intake plenum from its stock location. The stock LS3 MAP sensor location is too close to the throttle body and high overlap events are exaggerated by the throttle blade area. The LS3 also likes a bigger duration on the exhaust lobe.....#2!
Your best choice is cam #1. The 114 LSA is going to give you much better driveability, and a broad powerband. The idle will still be noticeable even with the wider profile. LS motors do not require a lot of duration and tight LSA's to make great power. A lot of people make the mistake of overcamming these motors. Regardless of which cam you choose, you will need to upgrade the springs.
Last edited by Later-A-Body; 08-31-2015 at 05:45 PM.
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