[Elarson]

Originally Posted by dv657172

I sure hope I am not wearing you guys out with all my questions....really appreciate all the help & advice

Engine temperature is increasing 20-25 degrees from staging lane to the end of an 1/8th mile run. I wouldn't think it should heat up that much?

Car temp seems stable but elevated after a run at around 210 degrees as I go back to the pits. It typically is 180-190 degrees in the staging lane but does creep higher with any notable wait time.

Typical outside temperature is 70-80 degrees, 70-80% humidity

1965 GTO dedicated drag car with a 1968 400 (462") and 68 #16 heads
Griffin Universal Radiator - 2 rows of 1" tubes with shroud and SPAL electric fan
Meziere Electric Water Pump - Heavy Duty, 42 GPM
Moroso coolant restrictor in place of a thermostat but I dont know what size the opening is off hand
Car has a SPAL temp sending unit (185/175) in case I dont remember to turn on my manual override switch for the fan and water pump
Have only ever used 100% distilled water + Water Wetter in the car

New personal best Friday night (7.577, 89.64 in 1/8th) so car seems to run ok but has always seemed to get hot pretty easily once it initially builds up some heat

Is it possible to push water through the radiator too fast? WP appears to definitely be working well when I look in the radiator

Thanks
DV

Your car may only need 30-50 horsepower at cruise. So going down track, you may be processing 10x as much energy; so a temp increase is very normal. If the temp comes back down during your cruise back to the pits, your cooling system is working fine.

Eric