the psitons out of the H20 fork lift will lower the compression they are
dished on top. I have them in my turbo U20 and with a open chambard head
is around 7.5 - 8 to 1 compression.
Mike Kerr
Restoration Products
3730 todrob Ln.
Placerville, CA 95667
Ph# 530-644-6777
Fax# 530-644-6777
E-mail mikekerr@innercite.com
Web; innercite.com/~wolfgang
-----Original Message-----
From: Kyle Hagemann <kwhcpa@addler.net>
To: datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>
Date: Tuesday, May 23, 2000 4:55 PM
Subject: Re: U20 Compression
>There's been a lot of information circulating re: higher compression...
>but what about lower? Suppose someone wanted to get his U20 down to
>87 octane territory - with the SU cam.... what CR would that be? I'm
>guessing about 9.0:1 or so? What is the stock CR, 9.5, maybe more?
>
>>From the L-series, I'm somewhat familiar with the concepts of valve
>unshrouding and chamber relieving... but specific "grind this much
>here" and "egad, man, don't grind there!" tips would be wonderful.
>
>It's been six months since I drove it, but AIR, it ran like a finicky
>high compression engine, and needed 92 octane.
>
>The engine is out now, and I will be pulling the head for a gasket
>replacement, as well as timing chain inspection; but I don't want to
>disassemble the short block.
>
>TIA for any suggestions!
>
>Kyle
>'69 2000 (??:1)
>'71 521 (9.5:1, more head work to come [ping-a-ling!])
>'72 240Z (8:1, runs on anything;-)
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