408 still overheating :/
But i remember i was alwas driving with about 60km/h in 3rd gear so and when i was driving 100km/h with nearly no throttle the temp. came down a little but still too hot
100kph in third, with 3.23s is about 2488 no slip, so the TC is now nearly locked.If the temp only came down a little, then the TC may not be the source of the hi-temps. But at 100 the ram-air effect thru the rad SHOULD be cooling the rad pretty good. Because it does not, by this time (2500),
there are really only three possibilities;
A) the brand new Griffen isn't doing it's job, or B) the water isn't circulating, or C)the air is going around the rad.
By 100kph a properly functioning rad with air being rammed thru it, and the pump moving the coolant, it should be cooling very well. You got 2500ish rpm. That's lots of waterpump speed, no matter what the ratio,the number of impeller vanes or with/without the anti-cav plate.It shouldn't matter.
Also no matter what fan is being run.
And the throttle is; "with nearly no throttle", indicating to me that the timing has got to be close,and it ain't lean; cuz the engine is hardly working.
And the TC is as good as locked.
And even if the carb is sucking hot underhood air, by this roadspeed the underhood air-temp should be down to nearly the coolant temp.
So my best guess is lack of air-flow thru the rad.
Make sure the front of the rad sees the incoming air, and that the rad is sealed to the core support. It helps to seal the hood to the top of the core support.Make sure the air can get out the back of the rad and is able to exit the chassis. As in no full belly-pan! I have a small skid plate is on mine, and seems to be OK.
here's a sort of test; With a cold engine and engine off; direct a small water stream into the rad fins, from a straight-on angle; the stream should come out the back nearly as strong as it entered.
As to the bypass hose; I restricted mine to force the coolant to mostly stay in the main circuit.That seemed to help too. You might need a hi-flow stat tho. I already had one.
