Drilling 1/8 hole in T Stat question

Faster is better.

The faster the coolant flows, the more even the internal temps are and the more heat can be rejected by the radiator.


the only reason to slow it down is to lower the heat rejection by the radiator so the engine can get to operating temp.
 
Bypass hose goes away on my cars, intake hole is used for an aftermkt gauge. Stat is drilled w/ 2 3/32" holes. Done deal.
Did the same thing on BBC's I've had....
 
Top