Originally Posted By 451Mopar
I'm not sure how accurate this info is on the stealth head flow numbers out of the box, but I found this Hot Rod article where max flow was only 158.5 @ 0.500"
http://www.hotrod.com/articles/mopp-1205-big-block-cylinder-head-testing-flow-charts/

This is what my stealth heads flowed with just a bit of hand porting (gasket match, bowl blending, and valve job.) Not a huge improvement like CNC porting, but basically just cost me some time and the money for the valve job (and extra to flow the head just to see where it was at.)

Lift Intake Exhaust
0.100" / 82 / 81
0.200" / 157 / 127
0.300" / 221 / 151
0.400" / 260 / 174
0.500" / 278 / 190
0.600" / 283 / 200
0.700" / 289 / 211
0.800" / 289 / 215

I posted this way back in Jan, 2013 when I was putting the engine together.
https://board.moparts.org/ubbthreads/ubbt...tml#Post1024402



That's good info. Do the stealths really flow that poorly at .500?? That's really bad, even on the exhaust side.

2 kids and a dog