429 smallblock Dyno warmup

RAMM said
I agree with YR more than I disagree but this is one where I have to strongly agree. Chev 23 degree stuff has 100 to maybe 1000 times the market and development behind it. Just about any Mopar guy can grab a set of W2's and make 'em flow 290-300 cfm and most of that the cylinder will actually see--'cuz the port geometry is excellent. To re-iterate YR " A decent prepped W-2 will beat the **** out of any TRUE 23* non-RR port Shivvy head" I took some artisitic license of course LOL. I'd love to go nuts on a W2 and see what shakes out--ya know--angle mill, 7-8mm valve stems, dowel shift, CNC bowl/venture shaping, etc... J.Rob

I've done some of that work on W-2's, even made them square for more volume. I still have those castings but they are used up.

If I was going to do all that work, I'd find some W-5's that were unmachined. I have one bare casting I can get if I want it, but finding another one has not been easy. I'd move the guides so I could get a 2.150 valve and if I could squeeze it I'd go 2.200 with a 1.500-1.550 exhaust. I'd weld up the spring pockets, run a 5.400 valve and still get 2.00 installed height. There are many things I think I could do with those castings....if the castings were capable of handling it. Hell, I'd like to move the spark plugs away from the intake so the intake seat could be bigger in diameter and deeper without hitting the spark plug hole.

Like you said, there has been 10,000 times more development on the GM crap and that's sad. It's hard to make up for that.