Hot Rod Forum banner

400 small block question

816 views 5 replies 5 participants last post by  UR50SLO 
#1 ·
would i make much more power if i put 305 heads on a 400?
 
#6 ·
Combustion chambers way too small as mentioned and too small of valves.

Aftermarket heads are the way to go... You'll need the steam holes drilled with a 1/8 bit but that's it.
Edelbrock RPM heads were my choice.. ran them on my 406 for quite awhile...
With a JE flat top 2 valve relf. 5.7Rod 400 crank it was 10.7-1 and was happy with 92-93 oct. and was able to spray 150hp No2 with no problems.
Ran 11.60's on the motor and mid 10's on the bottle. 89 Camaro.
The RPM heads are under 1000.00 ready to bolt on. Good to .575 lift.
~Scott
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top