FuriousDonuts

Conventional wisdom seems to be, "Open up your engine and cut reliability in half." Still, I'm curious if anyone has done a cam package to improve performance *and* reliability on the track.

Road racing cars see 5,000+ RPMs for extended periods of time. My line of thought is that there might be cams (and springs/lifters/etc.) better suited for this environment. Bottom line goal would be to improve mid-range torque *and* high-RPM reliability (C5 LS6).

Thoughts? Or just a pipe dream?

taken19

I have heard to keep lift to .580 if you want your engine to last. Also, get a good set of springs and consider the rocker arm trunion upgrade and hardened pushrods.

J.R.

My general rules:

Keep lift under .600 @ .050
Duration under 230 deg @ .050
LSA at 114 to 112 installed
Single beehive springs to retain proper harmonics at high rpm
and to lessen load on lifters/camshaft, yes even though it is a hydraulic cam.
Use restrictor pushrods (lessen oil pooling in heads).

MX621

I'd look into eps lobes. Called a endurance lobe. Geoff skinner designed lobe only requires a single valve spring even over .600 lift. Can guru pat g uses them along with Geoff and his company engine power systems. They are grounded from comp under a eps license. I'm running a 230/234 .600/.612 112+4 on EPs lobes in my c5z. Quietest can Ls motor I've ever herd. No sowing machine sound. http://www.engpwrsys.com/tech-notes/cam-design.html

NOSLO6

Katech has a lot of track experience behind their Torquer cams and they also yield good results (I run one).

I'd give Jason a call by phone and I bet he can make a recommendation that would work well and has been tested in real world track day conditions.

neilvosko

+1
228/234 EPS cam ...under .600

taken19

Neil, did you drop a cam in the vette? What power did it make?

Webz

GM Performance ASA Cam

neilvosko

hey sean, yah, finally, had the cam in my house for months...460 on mustang...took some timing out since running pump gas

RaleighSS

I followed this exact thought process and would add... Replace valve springs yearly ... at same time have pushrods checked to be true replace set as required. Never had a valve train issue yet :-)

mathia

What cam lobes are you running? Would a Comp Cams XER lobe that met those specs still be too aggressive to be reliable?

FruiTay

5280Racer

call Cory @ Colorado Speed and Performance... they did my cam...!

bosco022

Hard to beat the proven performance and reliability of the GMPP ASA cam for a mild road race application. At only .525 lift 226/236 110 LSA this cam in my view out performs the numbers. A lot of thought and engineering went in to this cam by GM's performance engineers.

The cam was designed for the ASA National tour series that ran on both 1/2 mile short tracks and 1.5 mile speedways. It performed well in both applications. In an LS1 motor it pulls hard from 3500-6500 and can go about 6800.

This cam is typically is found in the SCCA GTA road race stock cars and as I said is a proven solid performer.

In the V8 StockCar series we have racers still running sealed ASA LS1's that could not have been built later than 2004 and have been running for years in road racing after the cars were converted.

The ASA is used In the GMPP LS3 525 HP crate motors, and it will make that number with only headers and tune over the otherwise stock 430 HP LS3.

There are obviously cams that will make more power, but this is a very proven, easy on the valvetrain way to go.

The ISKY 165-A valve springs work well with these cams, but in the ASA LS1 motors they came with the LS6 type spring that worked just fine.