aluminum head

H

harryc

Senior Member
Is anyone making a relatively low compression (6:1) or less aluminum head ? of any style? Cast iron heads are getting to be too much for the back at my current state.-------thanks
 
How often are you removing heads? You could always use an engine hoist to remove them and move them to a work bench or at least chest high for optimal carrying.
 
I have wanted to up the compression on my stock A speedster, but I am worried about knocking the bottom end out of it.
 
wow, just went through all those speed websites and I want my wife to ignore the debit card bill for a while
 
It's not high compression that causes babbitt problems, it is detonation. I ran a 7.4:1 Cyclone head for years with no problems.
 
Is there a stock looking aluminum head being made?

Also, do any of the heads mentioned above use stock sized plugs?
 
In the 60's and 70's I ran an original Thomas 8.25 aluminum head on an old worn out babbitt Model A engine.

Dwayne Helms here in Denver runs a 12.0 to 1 Cooke head on a babbitt engine.
 
Last edited:
Railcarmover said:
Why? is your engine tired?
Click to expand...

well ive not had the bottom end apart but it runs smooth and fine doesn't burn oil makes no knocking sounds

I was under the impression that higher comp was very hard on the bearings so haven't done it would like to however
 
the reason I specified 6:1 or less was to maybe reduce oil consumption. I really don't know but it would seem that a higher compression would tend to inhale more oil past the rings on the intake stroke-- that was my thought anyway.
 
harryc said:
the reason I specified 6:1 or less was to maybe reduce oil consumption. I really don't know but it would seem that a higher compression would tend to inhale more oil past the rings on the intake stroke-- that was my thought anyway.
Click to expand...

I would think tht would make no difference at all compression has nothing to do with the intake stroke while the valve is open
 
You must log in or register to reply here.
Back
Top