Originally Posted by
More Power
Seems we re-hash this same topic every once in a while....
A single hi-flow GM t-stat can pass about 90 gpm when fully open. A hi-flow gpm water pump can move about 130 gpm above 3000 rpm.
The hi-flow t-stats, coolant crossover housing and water pump were all made to work together without creating excessive pressure or cavitation.
Back in the day I conversed with a GM cooling system engineer about the then new components. He reported that in their lab tests, they saw overpressure cooling system problems during extreme tests, and that the full set of components were necessary for the full effect of the improvements.
With that said... I know people who have installed a hi-flow water pump without any of the other components, and haven't reported a problem. I also know people who don't wear safety glasses when they use a grinder, and haven't lost an eye.
So... do what you think is appropriate for your situation.
Over 3000 rpm,. not too often that high rpm i'd guess,.
I think a lot of engines over pressure their cooling stsrem under extreme duty cycles,.
I think there is a very strong feeling on this forum that GM is god around here too,.
and whatever gm does it must be the best,.
I personally don't think so,.i have met many engineers over the course of my life,. they are like doctors or mechanics of chefs,. no two can agree exactly on anything,.and quite often can't see the wood for all the tree;s they've tested,..
The internet is full of unproven statements,. but they get repeated so often after a while folks begin to think the fake facts are true,.
1999 chev suburban C2500
300,000 mi