Aluminum heads
#61
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Location: charlotte nc.
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Re: Aluminum heads
Originally Posted by tomcat
Hey Mike: We talked several times in Miami, and I know your stuff works. Maybe you have tested a combination that answers my question from above.
Suppose you have good aftermarket heads with the kind of exhaust that most of us a using, e-tops or maybe sport tubes. Your flow numbers are in the 375/250 CFM range at .600 lift on intake/exhaust. You try increase exhaust flow by:
a) porting
b) duration
c) both porting and duration
What has been your experience if you have done this back to back? Of course I'm thinking blower engine. Not after specific trade secrets here, just whatever you can share.
Suppose you have good aftermarket heads with the kind of exhaust that most of us a using, e-tops or maybe sport tubes. Your flow numbers are in the 375/250 CFM range at .600 lift on intake/exhaust. You try increase exhaust flow by:
a) porting
b) duration
c) both porting and duration
What has been your experience if you have done this back to back? Of course I'm thinking blower engine. Not after specific trade secrets here, just whatever you can share.
Last edited by mikes280; 03-22-2005 at 08:12 PM.
#63
Re: Aluminum heads
Originally Posted by WETTE VETTE
Give it a shot GPM!! At the RPM levels you turn you may just be on to something. I could see the added exhaust duration allowing some cylinder pressure to be lost in the lower RPM's, but at 7500 there isn't much time for too much to sneak out!!
#65
Re: Aluminum heads
Originally Posted by KAAMA
Just an honest qestion here----what added amount of duration does a 1.8 ratio rocker give over the standard 1.7 ratio rocker arm? Thanks
#66
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Re: Aluminum heads
Originally Posted by formula31
hehe, you caught em. good one
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