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U20 RPM range, cam timing, valve adjustment

To: datsun-roadsters@Autox.Team.Net
Subject: U20 RPM range, cam timing, valve adjustment
From: Kyle Hagemann <kyle@sonic.net>
Date: Mon, 04 Jan 1999 09:10:54 -0800
Hi all;

On my '69 2000, the engine feels like it runs out of air and/or fuel at
about 5000 or 5500 rpm.  Looking at the redline (7000, AIR?), I think I'm
missing something.  Any clues out there, or is that how SU-equipped U20's
go?  The engine is stock, save the four-blade fan, no smog, and header.
Carbs have N-17 needles, if that means anything.  Timing is set at around
10 BTDC initial, distributor is stock, AFAIK.  There may be some weirdness
with the dist advance - perhaps a broken advance weight spring or some
grungy gumminess; the mechanical advance seems to come on all at once, so
maybe that's a possible culprit?

This may be related to the above; is there an easy way to check the cam
timing on the U20 *and* adjust it if necessary?  The above symptoms make me
wonder if maybe the cam is retarded - plus, the car feels VERY torquey from
idle to about 4000 rpm - not a sports car rev range;-)

Oh, and what are the valve supposed to be set at?  And how do I get the
valve cover to quit leaking?

TIA,

     ____  Kyle Hagemann, Born-Again Grease Monkey From Beyond
 _.;(____\____    72 240Z, L28, 5spd, poly, etc. - The Z-Beast
|  _ |   |  _'@`, 66 1600, R16, 70 fenders, 68 hood - The Mutt
`-(@)------(@)-;  69 2000, U20, goes like stink - no name yet!
-_-_-_-_-_-_-_-_- 84 Maxima, it's a bulletproof tank - Mr. Max
http://www.sonic.net/~kyle 240Z tech info, Win95/8 theme, etc.
  "Ignorance is no sin.  Ignorance of one's ignorance is..."


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