Low temp thermostat

[Mike Rolica]

No doubt.  Its them damned kids magazines with all that advertising crap

Lower thermostat is not better!
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	nacelp at jvlnet.com [SMTP:nacelp at jvlnet.com]
	Sent:	Wednesday, October 27, 1999 1:03 AM
	To:	gmecm at efi332.eng.ohio-state.edu;
gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: Low temp thermostat

	Unless the AFR was corrected for the temp difference the testing was

	worthless.  Period, 160 to 190 leans the motor by 6% inna 730 90
F-body as 
	an example.  So all they showed was the motor liked more fuel when
cooler,
	whata shock...............
	  If the dyno operator is a dodo, the results are worthless.  Try
reading the
	archives, I'm just tired of repeating the same thing week to week.
	Grumpy...



	>It depends on the engine.  Spend some money on Dyno time.  IE put
the
	>car on a dyno and do some runs at the temps you feel happy with and
see
	>what happens to rwhp.  A local shop owner who has a 91 Corvette zr1
ran
	>extensive tests with his own car and found that the LT 5 engine
likes
	>the cold (It was designed in England) max HP was at 159 deg water
temp
	>as indicated on the DIC.  The HP fell off quickly for the next 15
or 20
	>degrees above that (don't remember the numbers as this was several
years
	>ago.)  I had a chance to talk to several engineers involved in the
	>design and testing of said engine and they confirmed that the
	>operational temperatures were an Emissions issue rather than a
	>performance issue and saw no real long term durability problems in
	>running the LT 5 engine in the 160 to 165 water temp range but the
	>cautioned that it goes closed loop? if it gets below 154 degrees.
I run
	>mine with open thermostat, aftermarket radiator and fan switches
and see
	>160 deg temps in summer Fla heat on the interstate with 190 or so
in
	>town temps.  Engine has 140,000 mi total with a broken valve spring
	>rebuild at 67,000 mi. currently has 400+ rwhp (LPE rebuild several
years
	>ago).  I run it hard, drive it every day and have no complaints in
the
	>durability area.  Oh yea anyone ever try to diagnose a broken valve
	>spring on a quad cam motor? It aint easy.
	>
	>Tyler Townsley
	>PS Hoping to learn how to program the chip, a lot of what you guys
say
	>is over my head but I keep on learning.
	>