RotaryExtremes Monster Oil Coolers
 

http://www.rotaryextreme.com/oilcooler.html

I have a little money to spend and I was wondering if anyone has had any experience with this dual oil cooler setup. It comes in two sizes, 25 row oil cooler and 34 row oil cooler. Wanted to know if they both fit the stock front end or they mount as easy they make it sound. Little light on this subject would be greatly appreciated.

-Justin

I've seen a post before about them. I believe both sets are ideal for aftermarket front ends, but I do believe some one fit them with the stock front end. Your best bet would probably be PM'ing Chuck or e-mailing him and explaining your setup and I'm sure he'll point you in the correct direction. I do imagine that the craftsmanship is as superb as the rest of his products.
-Nic

Here's the thread I was thinking about
https://www.rx7club.com/showthread.p...er+oil+coolers
-Nic

thanks very much for all your help

Here they are installed. 25rows dual oil cooler from Rotary Extreme, they fit fine on stock bumper, no problem whatsoever.

http://www.berudu.com/rx%2D7/photos/...c/DSCN3638.JPG
http://www.berudu.com/rx%2D7/photos/...c/DSCN3645.JPG
http://www.berudu.com/rx%2D7/photos/...c/DSC00405.JPG

ooooo snazzy. How much did it effect temps??

Rotory Extreme does have a nice setup using quality parts but you could build your own using the same product parts and save $$. I believe RE sells this package for about $1200 when you could spend about $650 - $750 if you do it yourself, it's not hard.

www.amstreetrod.com even has free shipping on order of $500 or more which could save you even more - think of the other cool things you could get for your rocket ship with that extra money!!

Okay this is in winter near SF. So outside temp around 50F. So summer result most likely is different.
Oil temp stays around 150-180F during normal driving.
It also affect my water temp, by about 15-30F during normal driving. Water stays around 180F.

If I do 0-140-0mph on highway, water/oil still stays around 180F. Racing around city/highway, with rpms 4krpm to 7rpms, temps stays around 180-195F
I went to drift day, not much air flow since going sideways, and full 6-7krpms. Oil temp around 190F, Water temp around 210F. If I kept moving instead of waiting in line, it would for sure drop to 180F.

The gauges.
http://www.berudu.com/rx%2D7/photos/...c/DSCN3553.JPG

Thanks for your assistance reza, would love to check out your cars' setup sometime. I live right in South San Jose.

Oh yeah, another question. What about RE's kit, did it comes with enough SS oil line to run duals in a car that only had one to begin with, IE touring.

I feel obliged to point out that spending that much money on oil coolers if you don't road race the car is a waste.

An oil cooler upgrade IS important for track driving, but not street driving IMO. Do you even have an oil temp gauge to know how high your temps are getting?

Uh, did you look at the Picture !?
Boost, Water, Oil ! :D

I believe he's asking cagefreak (the original starter of the thread), not reza.

cagefreak,

Rynberg is correct. If you don't road race, then you aren't going to get the full use of the upgraded coolers. Also, as he mentioned, you really need a oil temp gauge first so you can see what's going on before you upgrade.

There is no way you can get the dual 25 row oil cooler kit that comes with all the components for $650-750 even if you make it yourself.

The only mark up I have on the kit is just for the brackets and the labor to assemble the hoses.

Chuck Huang

damn those are some low temps....maybe you should let me heat it up for you past 200f on the race track? let's see what happens at the auto-x....

You're right Rotory Extreme, it would cost about $900 but that's still $300 less then you package - if someone wanted to do it themselves. The other price range was for a pair of 19row coolers which is still much much better than a single stock and unleass someone plans to run big boost and and lot of hard driving in hot weather, they wouldn't need dual 25row or even 34row coolers anyway! But, don't get me wrong - you all still have great stuff and any serious seven drive should certainly stop by your web site!!

You can definitely make the oil cooler kit yourself if you have the time and patience to figure out how to route the lines, buy all the right fittings, and make the brackets. But you better make sure you made no mistake or you will need to pay more to get the right fittings or buy new lines because you cut them the wrong length, etc.

I will say if you buy everything NOT including custom brackets, you are expected to pay about $950-1000. I also include two custom metric to -10 fittings so you don't have to take off the stock oil lines going in and coming out the the engine block. That's something you can't buy at regular stores.

After paypal's 3% surcharge and custom brackets, I am pretty much making nothing on the cooler kit. Maybe $100 on labor only?

My post is only to indicate that you can't just add the cost of the components up to figure out the cost of the kit. There is more behind it to justify the retail price.

Thank you.

Chuck Huang

Let's get this straight for everyone. I currently do road race, and I more than plan on doing so with an FD. I'm just getting the facts straight with fitment of the oil cooler kit behind the stock front bumper. I'm getting this oil cooler kit regarless because it's the cheapest one on the market. Now that I think about it. It's one of the only ones I've seen on the market. Thanks again for everyone's help and opinions. Much thanks to Reza and Chuck Huang@rotaryextreme.

well with all that said I guess im going to save up for some dual 25 rows.My only question is the fact that if you get a single 25 row cooler its 800 and if you get the dual setup it costs 1200.Why isnt the single setup 600 hundred instead of 800.Since you are getting half of the performance? Doesnt make sense to me.Maybe you can help chuck.

You might want to note that it's kind of a waste to have that huge oil cooler with the stock bumper's relatively small oil cooler intake opening. I'd look into a '99 front bumper or something similar so that you could actually make use of the added surface area. I know that reza stated in a previous thread where I pointed this out that he wants the '99 bumper, but no funds :( .

I would like to say that what you are paying for is the time spent in developing a kit that fits and the convenience of being able to just fit it on. Unless you are real familiar with braided line and fittings it would be a little hard for you to just buy up a bunch of fittings and line and have it fit right out the box. We have bolt on kits for the FD that I make also. Chucks price nor our price is outrageous when you consider the time spent to provide you quality and convenience.

-Sean

You should see the water temp gets dramatically lower than with single cooler.
I have done HPDE in the past, and getting back in there when money permits. I do drift events which abuses the car even more with getting sideways and less airflow. Maybe need holes on the side for airflows.hahhahaha
And I do autocrosses too. You can see the cone marks on my front bumpers as evidence.

Making the SS lines are not cheap. I would pay someone $200 to make them lines....

Because some components are needed for either the single or the dual. Single set up does not just come with half of the components.

If you think of it the other way, the dual oil cooler are supposed to be $1600 but you are only paying $1200 for it. :)

Chuck Huang

There is improvement on the dual 25 row even with stock bumper. Reza's data already confirms that.

25 row works fine with the stock bumper. But if you want to use the 34 row, I will recommend a bumper with larger opening.

Chuck Huang