I am considering a 170 or 180 thermostat and was wondering if it would be ok to use it with the stock computer/chip? would i have to get it programmed?

 

Simple answer, NO you won't.


You shouldn't have to with even a 160 thermostat, since the computer enter closed loop right at 160 degrees, and I've NEVER seen a stock cooling system hold 160 degrees EVEN with a 160 thermostat.. UNLESS you are going by the factory gauge, then ANYTHING is possible



HTH

 

I just got a 160 therm and it's been working fine with the stock chip.

 

It will always run on the rich side. 180 is a good choice for most applications, anything colder results in a loss of fuel economy. I have tried every one with detailed mileage tests and anything lower than a 180 results in a loss of as much as 3 mpg. The ECM is not as compensating as people think. Plus you get a wide temp swing from highway to stop and go. Stable operating temp is much better for engine driveability no matter what you read here or anywhere else. A 180 keeps the engine closer to it's target 195 and is a nice choice if you want a little lower average temp.

 

180 works great for me. runs close to that on the highway but in traffic for awhile it creeks up to 220, before it would be at 220 on the highway with the 195 and start getting a few notches past that during traffic.