429 smallblock Dyno warmup
I don't get why they can get 320 plus out of Chev's crappy 23 degree heads and we can't??
Which Chevy heads? There's many to choose from. LMAO
Like listed, the heads (and blocks) real estate is laid out a little different. The head can be altered accordingly to allow the available port to be expanded on without the "MoPar" issues.
While I like the MoPar heads design better, valve angles, rockers on a shaft, etc... the OE head has a few limitations that aren't fixed in the aftermarket or at least "inexpensive." And that is also a big problem. Tighter than a frogs *** wallets on building cars.
My W2 & W5 heads were purchased bare. Then the purchase of valves, guides& seals. All of that still equaled cheaper than a Chevy head. Now your saying wait, what about the rest? Well, I say the missing parts are changed out in many heads anyway in favor of a better part (valves, retainers and locks) over what came stock. Even if not, the cost difference is small and the part is or can better than a OOTB Edelbrock, Brodix etc...
In many many cases, the springs get changed out to match the cam to be used.
Guess what?!?!
Still cheaper than an Edelbrock head.
And by a margin that ALMOST makes there use easy to do.
The killer part is rocker arms.
However, on any decent or serious head, these costs should be easy to swallow since your building a more serious engine vs. a plain old standard OOTB headed engine.