308 head flow numbers or efficiencies??

Looking for actual head flow numbers at different lifts up to .4", or head flow efficiency numbers. Heads should be stock or mildly ported/port matched.

Need for engine sims.

Any help would be appreciated.

Thanks,
Doug

 

I can't see whatever you attached.

I use Engine Analyzer V3.2. It does a pretty good job, some things don't quite match reality once the motor is on the dyno, but it is fairly close and gives a pretty good indication of whether or not an idea has any merit.

For example, it totally missed the massive low speed TQ gain when i added the H pipe behind the collectors on my V8, but it didn't offer a choice for H pipe either. It did correctly note an anomaly with a reversion of some sort at about 2200 RPM on the same motor that needed a bit of dyno tuning to make go away.

Motor probably can't do .4" lift, but if the valve will open that far, it is a good number to have, as interpolation is a wonderful thing.

Thanks,
Doug

 

Little buggers don't flow very much, eh?

My small block Chev heads flow 320 CFM at .6" lift. Of course this is at 28" water.

Here is another reference, that has QV heads, but no 2 valve. These are at 28" water.

http://www.users.interport.net/s/r/srweiss/tablehdc.htm#Ferrari

Thanks,

That will help me a a lot.

Doug