Low temp thermostat

[CSH-HQ]

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.
>