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Mark42 · 01-19-2010, 09:18 PM

A quick update....

Installed the 180 thermostat. The PCM was programmed w/ low speed fan to come on at 190 and off at 187. Its working perfect. The engine has not got hot enough to trip a fan while driving, and when sitting idling, it takes about 5 minutes when the outside temp was about 45F before the low speed fan would come on. It didn't get hot enough to make both fans come on. Probably have to wait until hot summer weather for the high speed fan to kick in.

The heat still comes out strong, and the motor warms up in the same time as it did before w/a 195 thermostat. Just doesn't get as hot.

And another nice side affect of running cooler is longer engine oil life and transmission life.

01-19-2010, 09:18 PM	#10
Mark42 Join Date: Oct 2009 Posts: 443 iTrader: (0)	A quick update.... Installed the 180 thermostat. The PCM was programmed w/ low speed fan to come on at 190 and off at 187. Its working perfect. The engine has not got hot enough to trip a fan while driving, and when sitting idling, it takes about 5 minutes when the outside temp was about 45F before the low speed fan would come on. It didn't get hot enough to make both fans come on. Probably have to wait until hot summer weather for the high speed fan to kick in. The heat still comes out strong, and the motor warms up in the same time as it did before w/a 195 thermostat. Just doesn't get as hot. And another nice side affect of running cooler is longer engine oil life and transmission life. __________________ 1998 Firebird Coupe Mods: 3.73 Gears, Eaton TrueTrac, PCM Tune, LS1 Aluminum Drive Shaft, Cold Air Intake, 180 Thermostat, Magnaflow Cat-Back Exhaust, Moog LCA busings. My Firebird Projects : Click Here