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Thinning Throttle Spindles

To: "mgs@autox.team.net" <mgs@autox.team.net>
Subject: Thinning Throttle Spindles
From: Chris and Jodi Barnhart <barnhart@geneseo.net>
Date: Mon, 13 Mar 2000 20:47:40 -0600
Listers

Anyone have any thoughts on when it's necessary to thin the throttle
spindles in HS4's to improve flow?  I've done the exhaust and intake
valve mods from Burgess's book and plan on increasing the compression
ratio to 9.5:1. No cam changes. The current "poppet" style butterflies
will be replaced by the plain butterflies, which should help some
(Thanks, Ed). Burgess doesn't really say at what point the throttle
spindle mods to the SU's become necessary. I'm guessing at higher RPMs
than I'll typically run on the street. 


Chris 
'69B

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