[MartinLe]

Originally Posted by ZL1Atlanta

I am referring to an upgraded Stewart water pump for the cooling system. In my case, the stock one is no longer in line. In fact, the temps I referenced above are achieved with no heat exchangers in the car at all. That said, if I was commuting and sitting in traffic, I would certainly put the HX’s back in. I ran it like that for about 4 years and would do spirited mountain runs, drive it to the track (early on), etc.

The temps you referenced are way higher than I’ve seen with the 2650 in any scenario other than sitting still with the car running for a long period of time. A setup like I’m referencing going wide open throttle on a roll in 70* would be in the low-upper 90* area. No ice needed.

I have had a number of fellas, including my tuner, tell me that 138 is not high - in that it is not pulling any appreciable timing. At 7K I'm getting 28* of timing and she is running like a scalded dog. When the MATs do get high, timing is pulled and the motor is happy. In my limited experience, I can't see a way to keep the MATs lower than 130*- give or take - without aftermarket cooling. If you're driving in weather that allows stock cooling to get into the 90* neighborhood, it's too cold to use the power anyway. Of course, a strip dedicated car is something else.