It's not the headers being too close to filter etc. I've ran them touching the filter/pan & never seen any difference in oil temp.

1300 EGT's on gas is fine & normal.


I would not be relying on the dyno water pump to be pumping the water through the engine, we always run the water pump... the pump itself will be a MAJOR water restriction to the water circulation when it is not turning. I think that could be your problem..... It is why motor will run fine until you put it under load.

I know Air cooled motorcycle engines like a Suzuki GSXR motor etc do run very high oil temps, but they are also designed that way..... ie. very tight bearing clearances etc.

I can't give you a # on how much TQ it will take to turn over the motor, every one is different, there are too many factors (ring pack, valvesprings, rocker geometery, compression etc) that effect that.

All I can tell you is that 260* oil temp on a SB Chrysler is way way beyond normal, especially on a mild one like that.

I would run it with the water pump on & see what that does.