Author Topic: Porting  (Read 2585 times)

Offline airfueleddie

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Porting
« on: July 25, 2008 - 07:30:18 am »
Drag Racers I need your help. This is a subject I know nothing about. Please educate me. What is the difference between Alcohol Ports and gasoline ports????? I know for a fact that there is a difference because when MoPar released the Sprint Car W-9&W-8 small block race heads they offered em in alcohol and gas. Is the chamber the only difference? or is the intake ports or exhaust ports?? Another things are the Stage V Hemi Heads in Alcohol and gas. Whats the difference in porting? Can you use a port, intake or exhaust, that was desigend for alcohol and use it with gasoline? Thanks much for any help or feedback on this , I am going to purchase a new set of either Eds RPM 440's, possibly Indy 440EZ A-Body 440 heads, or maybe the excellent 440source Stealth heads, but I have always had excellent results with Eds products.   Eddie :biggrin:
« Last Edit: July 25, 2008 - 07:34:37 am by airfueleddie »




Offline Chryco Psycho

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Re: Porting
« Reply #1 on: July 25, 2008 - 11:33:22 am »
no difference that I am aware of in the porting other than you need approx 40% more fuel volume with alcohol, the compression always needs to be much higher with alcohol as well around 13:1

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Offline airfueleddie

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Re: Porting
« Reply #2 on: July 25, 2008 - 01:24:41 pm »
no difference that I am aware of in the porting other than you need approx 40% more fuel volume with alcohol, the compression always needs to be much higher with alcohol as well around 13:1
I see, so the difference in 'Alcohol Heads" are only the combustion chambers right? Probably very shallow? and easy to build compression with, very small chambers ect..?? Since I am using primarily street heads, I guess I should shoot for as much Comp as I can. This will probably figure in to my camshaft selection as well. CCC!!!Thanks Chryco.


Offline moper

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Re: Porting
« Reply #3 on: September 02, 2008 - 05:37:50 pm »
Not sure, but I think it has to do with the exhaust seat material. The Alcohol versions IIRC use Berylium seats, that take very special safety precautions when being machined. I forget which ones had them. Call Ryan at Shady Dell Speed Shop in PA. Google it for the contact info...

nivvy

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Re: Porting
« Reply #4 on: September 02, 2008 - 05:50:08 pm »

Offline airfueleddie

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Re: Porting
« Reply #5 on: September 04, 2008 - 08:03:14 am »
Yeah, thanks Moper/Stroker! I wouldnt want that stuff in my lungs! I think it would be wise to contact Ryan J at Shady Dell. :thumbsup: