If only half the radiator was heating up, there was obviously a blockage.
Try it again with the nwe radiator before making any adjustments.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Daryl Smith
> Sent: Sunday, January 08, 2006 11:21 AM
> To: Datsun-Roadsters@Autox. Team. Net
> Subject: Timing map help?
>
>
> I was having some overheating issues on my new engine (before Xmas) on the
> initial startup.
> First startup it went to about 240 deg (took about ten minutes)
> before I shut
> it down.
> Second startup it peaked just below 220 deg (fuel adjusted rich and timing
> adjustments) and I ran it for about 15 min. This is still too hot.
>
> I noticed when it was running that only the passenger side of the
> radiator got
> hot?
> I've since swapped in a known good radiator, but not sure that is
> the biggest
> issue. (haven't fired it back up yet)
>
> Engine is R16 block, G15 crank, custom pistons, 38mm SU's (temporary).
> MegaJolt/Edis ignition. (Megasquirt swap soon) Classic Instruments gauges.
>
> I know I will be adjusting the fuel again, starting from scratch
> (mixture nuts
> all the way in, then .......)
>
> My timing, without vaccuum, is programmed for:
> 16 to 36 deg btdc without vacuum,
> 24 to 44 deg btdc with vacuum,
> from idle to 3000 rpm.
>
> For the second startup it was at 27 deg BTDC running in the
> driveway at 2000
> rpm.
>
> My mods prevent me from putting the dizzy back in (butchered
> dizzy mount) to
> check dizzy timing, Soooo.....
>
> I was wondering if anyone knew the timing curve of the stock
> dizzy, with the
> vacuum hooked up, between idle and 3000 rpm?
> I am thinking the above timing may be too conservative (retarded
> timing will
> overheat the engine) and would like to know what the stock would
> be at........
> (I know, it would have been so much easier if I would have thought of this
> BEFORE I started cutting!! :oops: )
>
> I have retorqued the head, Will reveiw how to adjust the carbs, and will
> borrow a infrared thermometer for the next startup (soon), but
> wanted to check
> on the timing issue,...... and any other issues I may have
> overlooked.....
>
> (this is also at http://www.311s.org/phpBB2/viewtopic.php?p=22875#22875 )
>
> Thanks a bunch....
>
> Daryl
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