Quote:

It used to be common on hard hit nitrous motors for people to drill and tap a 4an fitting in between and below those exhaust ports in the heads and run lines to the thermostat housing.



Quote:

It used to be common on hard hit nitrous motors for people to drill and tap a 4an fitting in between and below those exhaust ports in the heads and run lines to the thermostat housing.



That's interesting, I have never seen that.

I wonder if the drilled passage should turn 90 deg. down and through the deck surface of the block......or if it would just circulate outward from the head?

seems like it should go through the block....



Seems like reverse cooling should help the overall head temp, and might be enough to take care of it also, maybe?

Rich H.

Esse Quam Videri