Yellow Bullet Forums banner

1 - 3 of 3 Posts

·
Registered
Joined
·
1,584 Posts
Discussion Starter · #1 ·
We ran a big chief chevy with a good roots blower and made around 2400hp at 9000rpm and 46 psi. We knew it was getting to the limits of the combo so we picked up a D rotor psi screw. The plan was to run about the same boost{92%od} and pickup some power without twisting it harder.The limit of the engine is the valetrain,as it will destruct at high rpm or cylinder pressure.Especially the exhaust side.
We're considering a new cam to help these issues so we had the heads flowed and they are down about 50 cfm on the intake. 466. A good port can go 525.
The question is...should we work the heads over when we have cylinder pressure and rpm roadblocks anyway.Does a good flowing head make better power with less cylinder pressure? We know the D rotor can force the air through but we're to the point that we need to finesse it or both heads will be doorstops.
Thanks for any ideas,
Mike
 

·
Registered
Joined
·
25,667 Posts
could this down 50 be the bench or test method? fix the port and try a new cam. all of the above. 2 cents here.
 

·
Registered
Joined
·
2,263 Posts
wheres the static compression? 18 degree chiefs?
I'd stick that D rotor on there about 120 over, it only needs 8500.
Sounds like a decent motor if it made 2400 with the roots. Will need major fuel system changes though
 
1 - 3 of 3 Posts
Top