160 thermostat or 180 thermostat???

[4x4chevy]

I have both and i was just wondering if i put the 160 in my truck will it make it run like crap or too rich to rob gas mileage.I have a 350 tbi in my k2500 sub and i will be ordering a jet stage two chip to thow it the with the spacer.which one would be better 160 or 180 stock and chiped.And also do i have to realy run higher octane gas with the chip(i have a 32 gallon take)Sorry for the long thread thanks

 

[kevhill85]

I would run the 180 if your thinking of the gas mileage...

 

[94 Silverado]

They are suppose to run at 195 stock. See if the parts store has one of those.

 

[Fobroader]

The 195 payed for itself with the first tank.

 

[1990GMCSIERRA]

well what if ur not stock which is better lol

 

[MIHELA]

195. If your engine runs hot get a bigger radiator.

 

[Crash]

I think the jet stage II wants the 180 and 92 octane, otherwise it might ping.

 

[daddy_dandy]

195 all the way. No need to run a cooler stat unless your boosted and having detonation problems.

Larger radiators can be had for cheaper than a stock L31 replacement. Ask for a C/k2500 rad, one for a 454 or one for the single cab C/k3500 diesel. They all use the same core support and last time I checked those radiators were all cheaper. A little visit to rockauto.com should lay everything out for ya.

 

[1990GMCSIERRA]

all my budys run 160's in there obs'

 

[Greg]

I'm running 160, but not by choice. I'd prefer to run 180 or 195