Anyone have any real world numbers/info??

2-3 tenths over a set of decent 1.88 OEM heads!

The ones i have i have ported myself and they flow 298cfm at just over 0.5 lift then they go tubulant.
What i dont line about them is
1: one valvecover bolt is off.
2: stainless valves in cast iron guides.
3: intake fit perfect without one intake gasket.(having them milled now)
4: heavy as he##
5: had to do some grinding on the outside for the alternator.

So i would go aluminum if i would start over.
Maybe try the new procomp castings.

We moved the valve cover hole that was off slightly.

You can have bronze guides if you would want them

We can do the heads with a 2.055 intake valve that is .100 long so you can put some real valve spring on there

Our RHS heads (same head) went 258 @ .600 and then stalled. This was with a very quick unshrouding the chamber and smoothing the guide bosses. Less than an hour spent with the grinder in hand. Flow numbers were pretty impressive from .500 up to .600 as well.


This was with the supplied 2.02 intake valve, by the way.

These heads went a best of 10.14 @ 128 at 3100#, throught the muffs with a solid, non roller cam, and a 30 year old 800 Holley. Yes, it was GOOD air. Summer came it slowed down to 10.20's @ 126/127.

And yes, I know the ET/MPH looks wacky, but so do the 60' and 1/8 mile numbers. Just a wacky car, I guess.

Thats some AWESOME et's!!!!!!