This is topic how much boost? in forum Tech Talk at Northern California Ford Owners  .


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Posted by 91 5.0 (Member # 1527) on :
 
How much boost do you guys think I will see with an A-trim supercharger with a 2.95" pulley? I see about 5-1/2 psi with the stock 3.33" pulley. Any idea????

[ March 21, 2003, 09:22 AM: Message edited by: 91 5.0 ]
 

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Posted by 91GR40LX (Member # 1329) on :
 
You can calculate your impellar speed here:
http://www.vortechsuperchargers.com/tech/impspeedv-1.html
I didn't know your crank pulley diameter or where you plan to shift or I would have plugged the numbers in.
From there you should be able to plug into the A trim flow table and see what you'll push or...bolt it together and let it rip!

[ March 21, 2003, 09:40 AM: Message edited by: 91GR40LX ]
 

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Posted by hidnn.o.s. (Member # 1219) on :
 
Not sure on the pulley size, but I saw 10psi for quite a while out of my old A-Trim with a power pipe and pulley. I eventually sold the kit in working order for $1,100. Motor was stock with regards to heads, intake, etc....
 

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Posted by 91 5.0 (Member # 1527) on :
 
well right now i have to shift at 6000 RPM. Im using the stock crank pulley.
 

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Posted by 91 5.0 (Member # 1527) on :
 
what size is the stock crankshaft pulley?
 

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Posted by O.G. Cobra (Member # 747) on :
 

quote:

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Originally posted by 91 5.0:
well right now i have to shift at 6000 RPM. Im using the stock crank pulley.

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on stock HCI????
 

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Posted by 91 5.0 (Member # 1527) on :
 
no. TFS track heat intake, e-cam w/1.7 rockers, and stock heads.
 

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Posted by O.G. Cobra (Member # 747) on :
 
6000 still sounds a little high for stock heads, but maybe that's just me...
 

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Posted by hidnn.o.s. (Member # 1219) on :
 
Sounds about right to me.
 

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