Well before i start let me just say i tried searching and i couldn't find any relevant information.

I have a touring model RX7 so as well all i know that means i only have one oem oil cooler. I'm thinking if i should go with just an after-market single oil cooler or purchase the dual oem setup. Im trying to do this as cost efficient as possible. I'm still running stock twins, greddy smic, power fc, aem water injection, racing beat exhaust and hks downpipe, nothing crazy just would like to run more boost. Any recommendations or experiences of your own that you think will be relevant to my question? Thanks.

 

im curious too. ive been contemplating switching to the FC oil cooler and just running one... supposedly its a lot better and cheap...id be running it in a vmount configuration (between the ic and rad)

 

IMO single oem oil cooler is a weakness and at the very least add a second oem.
I would think lots available on this forum from those that have upgraded and plumbing would be easier than adding FC. That said I went with a dual Crooked Willow Kit years ago and noticed immediate drop in oil temps and never looked back. Adding better oil cooling is definitely one of the must do mods for the FD.

 

i wasnt going to add an fc oil cooler, i was going do switch so i still would be running one... ive read here people have no cooling issuses with the fc oil cooler (2nd gens)

 

i am running just one big cooler on mine. If I remember correctly it holds about 180% more oil than the factory twin coolers. If that translates to more cooling I am not sure yet.

 

What about a really big single oil cooler? Like something from Rotary extreme?

edit: haha ^posted just before me

 

Running a second OEM oil cooler allowed me to run my RX in hot summer heat without ever going over 94 degree C in traffic. Granted I have a KOYO rad too, but the second oil cooler is a MUST. The Stock OEM oil coolers in a dual setup provide plenty of cooling capacity for the Street/Track car with other cooling mods. I know others will get larger coolers with modified front bumpers to extend this capability.

If you are doing this on the cheap, check out Howard Colemans thread on modifying the abundant drivers side Oil coolers for a passenger side dual setup. In fact I even have a spare good condition oil cooler available.

 

What's the issue with the stock one unless you are tracking your car? In which case, I've found stock dual oil coolers with ducting are more than sufficient unless you are doing 4+ hour enduros.

 

To the OP,

I think the most cost effective way to add oil cooling capacity will be adding a second OEM oil cooler.

 

I'd like to see a comparison of oil temps under boost with two stockers vs. aftermarket (oversize) coolers on the street. My sense is you don't need (or even want) oversize oil coolers on the street unless you're running 20+ psi

Btw, remember to install a drain valve between the coolers, it's amazing how much more dirty oil you get out when you change it

 

To the OP, seek out a set of dual OEM coolers , cheapest way to go and will fill your needs.

 

In my opinion most bumpers do not have large enough openings to suficciently provide airflow to a single oil cooler. For this reason I prefer to do with 2 smaller coolers rather than 1 large one. Ducting is also very important as well as a path for the air to escape after it passes through the cooler.

 

I live in Florida where it is hot 9 months out of the year. This summer, I installed a new RH OEM oil cooler/lines. I also have a Koyo radiator. My oil temps dropped ~20 degrees and I am now operating around 180 degrees on a hot (90 degree +) day. My oil temps will climb to ~200 degrees at idle or under load but quickly drop back to 180 degrees once I am on the go. Naturally, my water temps are running a little higher than my oil temps. When the ambient temperature is around 45 degrees, the coldest I have driven in since the install, my temps, both oil & water, hover at or below ~170 degrees.

 

who makes the oil cooler? and whats the size of it? Looks good n exactly what i wanted to do.

 

I am also looking at upgrading my oil cooler. Currently I've got the stock single touring. Last summer I had some high temps so I'm trying to find some better cooling methods. I've been looking at switching to a single setrab or mocal 19 row. I found the setrab for $185 which isn't bad.
What else would I need besides the cooler itself? Do I need to purchase new fittings & lines, or is it just a swap out with the factory unit?

 

A big single oil cooler has huge benefits over OEM single and OEM dual.

1) More cooling capacity
2) More cooling surface area & rows for cooling efficiency
3) Better fin design & mounting locations compared to OEM

Every race car I've had the first thing I've done was the oil cooler in order to prevent engine damage. Especially with the FD's, you have to have an oil cooler. Some might need the option of getting the thermostatic switch for the colder climates.

 

You are going to need an external thermostat. The OEM oil cooler have them built-in. This might mean that you will need to do all the oil lines too unless you find a way to integrate the aftermarket t-stat to the stock oil lines then do ss lines from the t-stat to the oil cooler.

 

My car, which you have been in, is running a single Mocal cooler. As just mentioned, you have to account for the thermostat and lines as well how you are going to mount the cooler and the ducting changes. It's not a small project but doable. I listed what I used here:

https://www.rx7club.com/showpost.php...&postcount=245

Going with the dual OEM setup is the most painless way to go and will give you more than adequate cooling.

 

I think this is going to be my plan.

 

Its a griffin core with a earl's thermostat upstream. Dimensions are about 8" x 10" x 2.5"

 

Sakebomb Duel Oil cooler setup?

 

I have a full bolt on Dual Setrab kit (like sakebomb) forsale...$800 shipped

 

Mazdatrix dual oil cooler set .

 

would be nice but wayy to much $$

 

Pricing out your own lot with quality components is over 800