angle milling vs standard milling?

[srtthis]

i understand its going to change the angle of the head to the intake

whos running heads this way? whos running it whos also run the same heads that had standard milling?

rick whats your thoughts on it?

 

[Bullitt347]

I think the whole premiss to the idea is to change the angle of the valves in relation to the piston. Chevy has different angle cylinder heads available, I think 18 and 23 degree heads. The Roush/Yates D3 head I think was all about getting the valve almost perpendicular to the piston, for a couple of reasons. First and foremost, was so that the piston did not have to have a dome to get compression, resulting in a flat top or nearly so piston for better flame propagation. You can make the combustion chamber smaller for compression and also you get the added benefit of increased piston to valve clearance. At least that is my understanding of it.

 

[srtthis]

yea i know the theroy behind it... just dont know any one whos done it. i know its going to change the angle in relation to the intake mating surface. may cause issues with bolt hole locations and things like that.

 

[NIKwoaC]

My understanding of it, is that with SBF heads it really isn't hugely advantageous for the average hot rodder, or even the hobbyist racer. If you can get your compression from flat milling, then that's the way to go.

On the other hand, if you're limited by class rules and you're hard core competitive racer, then maybe it's something to look into.

 

[srtthis]

pretty much trying to get the most out of the GT40's as i can before having any port or chamber work done

 

[Bullitt347]

I think for the time and effort and $ involved, you would be better off doing the port and chamber work. If you angle mill, then you have to re-machine the intake to fit, and as it is not a common modification to the Ford head, there is probably not a lot of information available as to the "wherefores and whynots" of this procedure as it relates to the SBF head.

 

[srtthis]

he i was just talking with a pure street race and he said its worth it but cost 3 times as much normaly

 

[Mr. Rustypwnz]

what niK had said. Also, dome pistons are a great way to add compression! lol.

 

[NIKwoaC]

Angle mill + port work + chamber work + GT40 head = should have just bought a nice aluminum head.

Haha.

 

[srtthis]

True...

 

[srtthis]

anyone else's thoughts on this?

only good thing i have going for me with GT40 iron vs aluminum is i have all of 50 bucks into these heads right now.

 

[Rick 91GT]

I think for the time and effort and $ involved, you would be better off doing the port and chamber work. If you angle mill, then you have to re-machine the intake to fit, and as it is not a common modification to the Ford head, there is probably not a lot of information available as to the "wherefores and whynots" of this procedure as it relates to the SBF head.

Yeah, I agree on this...we have done it at times but usually only on a race car that could benefit from the angle milling. It also depends on the chamber design as well....

 

[srtthis]

ok cool! guess i'll just stick to the standard stuff...