Racer Brown ST-21

Lakeeffect said

I have checked that out before but what does "Intake Closing Point (degrees)ABDC @ 0.050 lift plus 15 degrees" mean? 15 degrees initial timing?

I have read a lot on here in that last few weeks about guys with 10- 10.5 static compression having problems with pump gas. i know the fuel is only getting worse. but what is streetable dynamic compression?

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That's the figure the program uses to determine dynamic compression. It's the intake valve closing point plus 15 degrees. Nothing to do with ignition timing. I don't know what the closing point is on the ST-21 but my ST-14 is 43 degrees so for me to figure it I'd add 15 to 43 (58) and that's the closing point to use in the calculator.

It all depends on how you build things. I just got my new 408 built and installed and it's 10:07 to 1 and with 33 degrees total timing it runs great on 89 octane. The heads I used are closed chambered EQ's and I had the block zero decked and used a .039 gasket so the quench works good. I also polished the chambers which helps to reduce spark knock.

As for your cam, I think it'll work fine if you get some decent heads. You have 2 options on heads

1. Spend a ton of money rebuilding yours and having big valves installed and have them ported or

2. you could buy a set of RHS heads with 2.02's and minor bowl work that will at least equal yours in performance and have new heads in the process. Plus they'd probably cost less than it would cost you to do your smogger's.