Quote:
Originally posted by trs900
Thanks racerx.. I was worried that I would loose low end torque using 205's.. a little would'nt hurt as I have plenty now.. 205's over 185's wonder how much more hp they would give.. hopefully usable..
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TRS...don't forget about your cam profile.
If your 392 is currently making 430HP, swapping out and putting on the AFR 205's is going to be best done with a cam swap as well.
I am just over 500HP on a 408 with 205cc heads. 544TQ. Basically switch those numbers, give or take 10HP and TQ, for 205cc heads.
On a 392 with the cam profile required to make 430HP, your best bet would be 185's. You would see a more proportional increase in both HP and TQ because it is just a better head than what you have now, but similar port sizes, most likely.
Hey...you mentioned a "knowledgeable source" . . . we're ALL "knowledgeable sources"
If you ask 1,000 engine builders 205cc or 185cc AFR's for a 392 with your numbers, you will get about half of each answer, I bet.
To each builder, a different opinion.
Dart makes great stuff. I like my AFR's... If I were to "improve" my motor, I'd put a solid cam in w/ a little more lift & duration, go to 205cc heads, and bump compression up 1/2 point. That would probably take me from 508 to 575-600 range (HP)...
FWIW