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RE: CNC headwork

To: "Datsun Roadster List" <datsun-roadsters@autox.team.net>
Subject: RE: CNC headwork
From: RacerY@comcast.net
Date: Tue, 28 Mar 2006 06:45:06 +0000
Now if the cam chain set cost less than a JDM SR20 DET,
and was as easy to find,
(and lasted as long)

it'd be a real star!

It amazes me that people (Jeff Remfert, locally) race these cars
so competitively when parts are so unobtanium!

Maybe the real job is to re- engineer the cam chains...

Toby

 -------------- Original message ----------------------
From: "Gordon Glasgow" <gsglasgow@comcast.net>
> And considering how well a U20 head flows, why would you bother? If the head
> was really restrictive, you might gain something, but the U20 head is
> actually a very good design.
> 
> I know I've told this story before, but I'll tell it again because it's
> relevant. I took a junk U20 head to the guy who does my head work so he
> could play around with it on his flow bench. He told me later it was the
> best flowing non-crossflow head he had ever seen. He had a Jensen-Healey
> twin-cam head in there at the same time and he said the U20 flowed just
> slightly less than the Jensen all through the range.
> 
> The U20 engine may have areas where it can be improved, but the basic head
> isn't one of them.
> 
> Gordon Glasgow
> Renton, WA
> www.gordon-glasgow.org




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