colling what to cool first.
 

im setting up my 577 n/a's cooling was going to go from water pump outlet to log style p/s cooler then through trans cooler in bellhouse to log style eng oil cooler to engine water crossover. does that sound right? thanks in advanec for you help. ratman
i'm getting close...should be dipping it soon.

Re: colling what to cool first.
 

Thats how mine is except i have a fuel cooler because of the EFI ahead of the power strng cooler,Smitty

Re: colling what to cool first.
 

ttt

Re: colling what to cool first.
 

Depending on the size of your oil cooler, it might need to be first in line to get cool water.
If it is undersized, or marginal, I would personally plumb through that first.
If it is overkill for your motor, then it could be anywhere...

My HP500 is plumbed through the oil cooler first (mounted on the bell housing), then the P/S cooler.
Kent

Re: colling what to cool first.
 

I run from the lift pump outlet through the P/S cooler, then the engine oil cooler, then the transmission cooler on my N/A 540 EFI. I'm using a 3"x22" combo cooler from Eddie Marine for the engine oil and transmission. I don't have thermostats on either, and I find that the engine oil is probably heating up the transmission fluid most of the time rather than cooling it. It seems to work fine, as my transmission temperature warms up quickly and stabilizes at about 140 and it never complains (overbuilt 72C with 8 kevlar clutches). Everything I've read about 72C's says don't run them too cold or you will have problems. Engine oil temp ranges from 200 at a steady 3500 rpm @ 40 mph to about 230 at 4600 and 60 mph. I've held it pinned for a few minutes at 5100, and didn't clear 240.

BTW if anyone ever needs a 72C, and you don't think you need to pay top dollar, contact Mike at Harbor Marine in Everett, WA. He normally works these things for trawlers and cruisers, but I feel he can build one for a mild application as well as anyone. I got mine for $1400 with a SSMIII tailstock and no core turn-in.