Speedmaster Small block porting tips and results Part 1

yellow rose said

Like I said...I don't pick a valve job based on lift. And I'm not the only one.

If you're so concerned with low lift flow, you should follow DV and use a 30 degree seat.

That's a sure fire power loser. But he seems to think low lift flow is the do all, be all, end all. It's not. Not even close. But hie thinks it is.

LOL...in fact, if you look at his porting book, his own writing contradicts some of the CFD work he published in the same book.

Click to expand...

Low lift flow isnt everything just as much as high lift flow isnt everything. It's all important. Getting the most air you can in with the window of lift and time you cam for is the object. Which brings us back to not everything is max effort, hence why the higher low lift compensates for the lack of cam/rpm.
I don't think he needs a 50° seat to get the numbers he's looking for. That's all I have to say about it till you dig out your econo heads and test those seat angles out on'em and report back with stellar results...then maybe I'll go back to work on those j's and see if 290cfm decides to rear its head in the other 7cyl. One port is special sometimes...strangest thing.