Oil and PS Cooler
#1
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Joined: Sep 2013
Posts: 26
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From: Jacksonville, FL
Removing a mostly stock 502 mpi and replacing with a a built 555 making 650 ish HP.
Question is reusing the stock cooler that’s on the old motor now ( mercury ) or go aftermarket?
Question is reusing the stock cooler that’s on the old motor now ( mercury ) or go aftermarket?
#2
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
You definitely want bigger and my guess would be at least a 3x18” but give Mr. Cool a call and he could spec it out. I can’t stress enough to go big and put a thermostat on it. I had to reinvent my system a couple times as I upgraded power and it is the biggest pain in the arse and expensive. Oversize and use a thermostat.
#5
If your looking for new - Oil Coolers :: Engine Oil Coolers / Oil Systems :: Diamond Performance Parts
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www.diamondperformanceparts.com
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302-521-0123
The Best Parts & Service At The Best Price
www.diamondperformanceparts.com
[email protected]
http://www.facebook.com/pages/Diamon...07878772615803
302-521-0123
The Best Parts & Service At The Best Price
#6
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Joined: Nov 2009
Posts: 4,198
Likes: 500
From: KY
Have a 530HP 509 in a very heavy boat. Went from 8x2 which was roasting the oil, to 18x2 which could not run for more then 15 minutes cruising before oil was getting to hot. Changed to 2.75x18 and now I can run all day and WOT without issues. Don't have a thermostat, but the guys above have the answers for you, mine is just some info
Have a separate small cooler for PS and it has been fine though out
Have a separate small cooler for PS and it has been fine though out
#7
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Joined: Sep 2008
Posts: 441
Likes: 71
From: KCMO
You definitely want bigger and my guess would be at least a 3x18” but give Mr. Cool a call and he could spec it out. I can’t stress enough to go big and put a thermostat on it. I had to reinvent my system a couple times as I upgraded power and it is the biggest pain in the arse and expensive. Oversize and use a thermostat.
#8
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Actually my service with Mr. Cool was very so-so. I’d either look at John’s in the swap shop, who is a solid seller who won’t give you junk, or Diamond Performance for new as they support us here and have only heard great things about them.





