toytech6466

I know I am going to open a huge can of worms here!!

What is the big deal with 170 degree thermostats. The mechanic in me wants to know. Thermostats only control minimum temps and not maximum.

The other part is, I guess the F150's are not setting slow warm up codes(i.e. Thermostat codes)

Thanks

NASSTY

This is from the manufacturer. > http://www.reischeperformance.com/WhyLowTemp.html

mechanicboy

I'll chime this in; These trucks do not monitor coolant temps, they monitor cylinder head temperatures. This means that even if the water temp is 170* the measured temperature will be more like 180-185*. So when people start discussing temperatures they see keep this in mind.

papa tiger

A lot of the cold thermostat effects goes back to non detergent oil usage and The yellow/white tallow like build up inside the motors. That happened a long time ago and was also with dry gas fuels motors. But of course the yellow butter/white like build up can still happen.

mrpositraction

You keep a cooler coolant temp you keep a cooler cylinder head temp. Isnt' rocket science. The down side to a cooler T-Stat is in colder climates you run the chance of not burning all the water out of the oil. Also, some claim that it decreases fuel economy but I have been running a 170 Tstat for a long time. Even went back and forth with it (stock to 170 back to stock back to 170....I have been running the 170 for awhile.

The upside, it is protection against detonation. I have datalogged both, and you keep and easy 20 deg delta over stock cooler. This is a good thing. With stock, I have seen coolant temps go up to 230, with the 170, beating the hell out of it at 22psi, I see a best of 208.

bigfx

iTrader: (1)

Does a t-stat need to be part of a tuner strategy to be used or can I just use it with the tune already on my truck...Texas gets hot would be nice to some extra cooling

Z7What

In my past experience(with 99-04Lightnings & 02-03HDs) it needs to be tuned for. If stock tune temp stragedys aren't reached it keeps the engine in open loop. You don't want this. So once it's adjusted in the tune it will go into closed loop.

Wayne

1994Vmax

You can but the electric fans will stick kick on at the stock values and not any type of lower temps. That said the fans on these trucks run more often than not so who cares lol.

ClaySlayer

True...just another thing to change in the tune...

swayse

Fans will come on with the ac on, and with me, that's all the time this time of year.