Hello all.
What's everyone using for a bypass thermostat for your oil coolers?
I need one that has -12 capability.
I can't use anything that attaches where the oil filter boss is as I'm dry sump.
Thanks.

I had merc racing hp style, saw several big power engines in south Florida recently and asked why they didn't have them? Seemed odd. Simple answer eventually they fail, one less thing to break.

I'm thinking Ill need one to bring my oil up to temp in Lake Erie.
Who makes the one merc used?
Thanks,
Rob

Not sure, it's the same from hp500 to 900sc. I know what you mean with water temps being 60 at best, but I'm thinking with a properly sized cooler and some oil temp maybe it's not quite as critical as some may think? Just thinking if someone puts out a 1100 efi without a thermostat and that's their answer it's worth thinking about. I like thermostats but I get it that if it sticks and now oil temp keeps climbing to 300 that may be worse

Food for though, for sure.
Thanks for taking the time to reply man.
I appreciate it,
Rob

+1

I got to the point where I swear mine werent opening when I had a set of Derale's.


If the oil isnt hot you arent driving it hard enough.... LOL

I have an oil temp gauge to monitor the temp.
My concern is a long warm up period to get up to temp.

I had a small block ford in my little hotrod searay and it would take quite a while to get the oil up to temp (I had an oil temp gauge) and it had no oil cooler. If it wasn't for my temp gauge, I'd have gotten into the happy stick way too early.

What if you use a valve?

Set it up to run around the cooler then crack the valve open to run thru the cooler?

I just bought coolers with the thermostat/bypass attached, works well finally get some oil temp at startup/idle and keeps a perfect 220 at wot. I would recommend sizing coolers to your power level, I went a bit oversize for future upgrades and you can tell the stat does not open much and when it dies it's pretty quick.

What kind did you buy and were from?