I had a big long reply typed up yesterday but just as I was going to hit submit, the power went out! Grr.
Anyway, a buddy (and long time DSM'er) and I went out for a cruise on Friday night. He brought his laptop with so we did some logging and he starting changing a couple of things. All I'd like to say is that this thing HAULS ass. At 25psi we were flowing 52lb/min at 10:1AFR WOT and stock timing. We were going to start playing with fuel trims more and timing when my CEL came on. 236*F coolant temps and it was all because of this:
That is the dry rotted plug that was capping the factory outlet on the water pump for turbo feed. It was clamped on and blew off right around the clamp.
First thing we thought was that the head gasket was toast. Got it back to the shop (towed) and ran a compression test cold - 165PSI on all 4. Ran it again hot and got 150PSI on all 4.
Drained oil - Ok, good, no coolant.
Replaced the plug:
I filled it back up with fluid, got some fresh E and drove around pretty much all day yesterday. 213*F was the hottest I ever saw with average temps between 186-195*F.
All I have to say is I'm happy I didn't screw something more up with that stupid plug!
Oh yeah, and breaking loose in 3rd on a 25PSI brake boost is pretty interesting, too
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