I don't know what that chart is, but it is not the correct flow data for our heads. It looks like the original GMPP CNC LS3 head flow chart got applied to the wrong head page on the website. When Hot Rod did the 3rd party head testing they checked flow along with HP and TQ vs other heads and our heads proved to perform with the best factory casting CNC heads in the test.

Their flow sheet from an off the shelf set of our heads is here:

http://www.hotrod.com/techarticles/e...4_casting.html

 

The numbers posted were unimpressive. Glad you straightened that out.

 

I've flowed gen 1 AFR heads attwo different shops and got completely different flow sheets.... Heads are the same but it shows that u can't compare even the SAME heads on different benches. Like I said earlier you probably can't go wrong with any of the big names, they are all very close. Just get American hardware and light valves then move forward IMO.

 

The SDPC heads did do well in that test. Their heads flowed better on the intake then the ones I had hand ported. Mine flow better on the exhaust You can't go wrong with a set from them. They will make some serious POWER.

 

Thats a good article. Definitely will keep in mind when i order my El Toro in a few months.

But im wondering which WCCH head that is? stage 2 or 3? Just goes to show you it's not all about flow. The WCCH's seem to have more area under the curves, but the SD heads made more Avg Power and Torque.

 

i hate to sound dumb but what does WCCH stand for?

 

West coast cylinder head

 

thanks for the info

 

Anyone?

 

2.165" intake valve = Stage 2 program.
2.200" intake valve = Stage 3 program.

Richard

 

looks like its the stage 3 they are testing

 

Thanks for the info