99-SRX
New member
Trying to find out the minimum operating temp for an 02 viper. I am looking at adding an after market water temp gauge. I have had no luck at finding this information in the service manual or from the dealer. I have tryed to read a stat but the dealer here was going to have to order one meaning I would own it.
Also is the calculation for the boiling point of the coolant the same as on a car rad, were each 1 pound of pressure in the coolent system raises the boiling point of the coolent by 3 degrees.
Also is the calculation for the boiling point of the coolant the same as on a car rad, were each 1 pound of pressure in the coolent system raises the boiling point of the coolent by 3 degrees.
yamaholic22
Active member
Your looking for a MINIMUM operating temp? I think this is kind of a subjective measurement as to what is warm enough, but i wouldn't be pushing on it at all until the coolant is up to at least 100*F. Should run more along the lines of 170-190*F at running temp. And yes 1lb for 2-3 degrees of boling point increase is a good rule of thumb.
99-SRX
New member
Thanks for the infoYamablue
Member
170-190 for the coolant is too hot. The temp light will come on around 180. The thermostat opens at 125 degrees on mine and I like to run it around 130. I start looking for loose snow to cool it down when it gets around 150, but it usually only gets up there when running hard. I have a digitron EGT gage with a water temp probe in the hose coming out of the head.
02 Viper
New member
Is that why yours is so far behind me on the lake ???LOL..... 
Yamablue
Member
Opps, I didn't address the minimum temp. I agree with 100 degrees for your warmup temp +-10 degrees.
You don't want to run much above 140. Much different than a car or 4stroke. Get it too hot and the rings loose their tension and break.