heads head acke

[gmctruck1976]

hello, new question, whats the differenceses in the new head design. dont have a clue on what domes to get with what head, do the still use gaskets if not what do they use. i have no idea here guys what do you all know. im running .40 over wesco dome pistons unknown porting unkown compression on stock heads whats the benifit guys

[HammerShee99]

hello, new question, whats the differenceses in the new head design. dont have a clue on what domes to get with what head, do the still use gaskets if not what do they use. i have no idea here guys what do you all know. im running .40 over wesco dome pistons unknown porting unkown compression on stock heads whats the benifit guys

 

The main advantage of a cool head isn't so much the improved cooling it's supposed to offer (it doesn't make much difference from what I'm told), it's mainly the ability to run different sized domes. Cool heads use O rings instead of gaskets. With regard to the domes, smaller domes mean higher compression. That means more power, but once you get up into the 160+ psi range, you have to start thinking about running race fuel.

 

Someone who knows more about this kind of thing might be able to tell you more or correct me if I'm wrong about anything I've said, but that's how I understand things.

[mopar1rules]

once you hit 150psi for compression, i like to have a 50/50 mix of race fuel to 93 octane, to be safe also.

[dajogejr]

The main advantage of a cool head is the ability to run different sized domes. Cool heads use O rings instead of gaskets. With regard to the domes, smaller domes mean higher compression. That means more power,

 

More power to a point...too much compression won't let your motor rev out, just like too much timing will hurt top end/overrev as well. But you are correct!!!

 

 

once you hit 150psi for compression, i like to have a 50/50 mix of race fuel to 93 octane, to be safe also.

 

Cranking PSI is a good place to start, compression ratio is more accurate... Add in timing, etc., they all factor in the need.

 

However.. I always like to err on the safe side. While too much octane might make the motor sluggish a little, too little will smoke the motor real fast:)

[87sheerips]

I also like to play it safe, but recently Ive tested my limits. Im at 165psi, +4 timing, and I can run 93 octane all day long with no problems. I usually try to run 50/50, but sometimes the race gas isnt always available. Just listen REAL REAL close for detonation if you want to try and stretch it!

 

-JD

[06BaNsHeE]

Yea to much timing is not always a good thing :geek:

[gmctruck1976]

Yea to much timing is not always a good thing :geek:

thank you all for the comments. this info will be usefull later on will look in to what your telling me