What T stat you guys running ? (Page 2/2)
hunter29 FEB 24, 09:51 PM

quote
Originally posted by Kevin87FieroGT:

Lots of good folks here to help you out! The archives and cave are full of info. Learn the search function, every question you can think of has been answered many times.

You found the right place for Fiero info. Welcome!



Thanks, I checked it out yesterday, lots of good info, BTW I owned an 84 for 34 years, sold it and now have the 86, but I'm kinda new, the 84 sat in my garage for 27 years, so I'm back in the game.
fierofool FEB 24, 10:02 PM
Both my cars would tend to run hot in slow traffic or in the mountains on a long climb. The 86 was worse due to partially dented coolant pipes. I run 195* thermostats in each and installed Rodney's 210 fan switch. Now, they run at the desired temperature and the cooling fan comes on before the temperature gets too high. Even in stop and go traffic. It was a super improvement for the 86. I originally had a stock switch and a 180* thermostat in the 87 and fuel mileage suffered.

[This message has been edited by fierofool (edited 02-24-2020).]

cebix FEB 25, 11:58 AM

quote
Originally posted by Kevin87FieroGT:

The V6 is designed to operate at 195*. With a correct running cooling system ( Ex: good water pump, fresh antifreeze, no leaks, non-smashed cooling tubes, good rubber hoses) you'll have no issues.



Add to that no debris anywhere in the system clogging the heater core or the radiator and no air in the system. Been fighting this battle for some time now.

Using the Stant Superstat 195. I tested it along few other thermostats and it definitely opens up the most of them all. I doubt though if this has any real effect on cooling.

[This message has been edited by cebix (edited 02-25-2020).]

pmbrunelle FEB 25, 12:36 PM
I like a 195 °F thermostat on a Fiero 2.8.

I tried a 160 °F thermostat, but the engine needed more acceleration enrichment, and despite that, the engine wouldn't rev up as cleanly (less good throttle response).

I didn't notice any driveability change when the temperature rose above 195 °F.

I never experimented with a 180 °F thermostat.

You don't choose a lower-temperature thermostat to reduce peak operating temperatures. The thermostat is selected to establish the minimum coolant temperature when the engine is already warmed up.