80 or 87 degree thermostat? which one to get for the PNW climate?
#2
Steet car?
Stock is the 87 degree thermostat and that's better for a street car because it keeps things in the right temp range. On my track car I run the 80 degree where the cooling system is struggling to keep up.
This is based on the recomendation of my engine builder who's got lots of street and track experience.
Rich
This is based on the recomendation of my engine builder who's got lots of street and track experience.
Rich
#3
I posted the same question a while ago when I had to change my aux water pump...
I went with the 87. I still have it sitting here though, because I couldn't get the old one out, even when trying to pry at it a little with a screw driver.
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#9
As it was explained to me...
When the engine is running under long periods of sustained boost, like a 20+ minute track session, the limitation in cooling ends up being heat transfer between the cylinders and the cooling passages. So having the water enter the passages at 80C rather than 87C gets more heat out of the cylinders themselves. This assumes you have a radiator that is sufficient to cool the water to 80C under such conditions.
At cruise or idle, having the water enter at 80C is excessive and over cools the cylinders. This makes for generally poor or inefficient running where you are most of the time on the street.
Rich
At cruise or idle, having the water enter at 80C is excessive and over cools the cylinders. This makes for generally poor or inefficient running where you are most of the time on the street.
Rich
#10
I was really questioning the assumption that the radiator can cool the water to 80C...
I know mine can't under load -- it can't even cool it to 87C on the track or even in traffic during the summer.
I have been thinking that I may need a new radiator though...
I have been thinking that I may need a new radiator though...