November 14, 2015 TFDarian

Product Review: KOYORAD Oil Coolers

In the recent weeks, Koyorad has been introducing new products for consumers to implement into their cars. Among all the substantial products, the new universal oil cooler line caught our attention. The design is result of a collaborative effort with Koyorad’s Japan, Singapore, China and US offices. For many years in Japan, Koyorad custom oil coolers have proven their effectiveness during competition in D1 Gran Prix and D1 Street Legal on Koyorad sponsored vehicles. These purpose-built drift cars are subject to indirect and inconsistent flow of air, occasional contact between vehicles, and high oil pressures, therefore they require superior build quality and high heat transfer efficiency. The all new Koyorad universal oil coolers are extremely well built, highly efficient and tough.

Since Koyorad has built their reputation for precision and attention to detail from their all aluminum racing radiators, you can expect the same level of high efficiency within the tightest of engine confines. Koyorad Oil Coolers incorporate -10 AN ORB (O-Ring Boss) provisions for the inlet and outlet allowing versatility. Users may easily reduce AN to AN, or convert from AN to Push-Loc style barb fittings for any needs. When you’ve invested so much into you engine, function and quality is paramount. Choose the all-new Koyorad universal oil coolers in combination with a Koyorad Racing Radiator for the best cooling system on the market.

Type: Advanced Drawn Cup
Durable Black finish
2 x -10 AN ORB (O-Ring Boss) provisions
Koyorad embossed header plate
Pressure Tested and Deformation tested

XC251108W – 25 row Core Size: 11.25″ x 7.5″ x 2″ approx. volume .5 quarts (17 fluid ounces)

XC191106W – 19 row Core Size: 11.25″ x 5.75″ x 2″ approx. volume .47 quarts (15 fluid ounces)

XC151405W – 15 row Core Size: 14″ x 4.5″ x 2″ approx. volume .47 quarts (15 fluid ounces)

XC101103W – 10 row Core Size” 11.25″ x 3″ x 2″ approx. volume .28 quarts (9 fluid ounces)

Koyorad Oil Coolers include the universal fit oil cooler only. They provide the following sandwich plate adapter guide to assist in the purchasing sandwich plate for your vehicle application (reference only, check with your factory service manual to confirm)

20mm 1.5 Sandwich adapter applications
Acura (All)
Honda (All)
Mazda (All)
Mitsubishi Turbo 4 Cyl. Cars (All)
95-98 Nissan 240SX
03-08 Nissan 350Z
09-15 Nissan 370Z
Nissan S13 SR20DET blacktop
Nissan S14 SR20DET blacktop
Subaru EJ20/EJ25 engines (All)

3/4 -16 UNF Sandwich adapter applications
BMW w/ spin on filters (All)
89-94 Nissan 240SX
Nissan S13 SR20DET redtop
Nissan RB26DET
Toyota (All)
Scion (All)
Mitsubishi Non-Turbo 4 Cyl. Cars (All)

We recently received a set of these coolers from Koyo to test and review. The first application was a Beams powered AE86, that is sporting Koyo’s first Beams swap-spec radiator. Since this company is extremely well known for their OEM and Racing radiators, we had no doubt in trying out their product. At first glance, the fit and finish, and attention to detail is unrivaled. Since these are universal oil coolers, there is freedom to mount the kit anywhere one would please.

We decided to mount our 19 row variant right in front of the brand new radiator since this area would be getting the most air flow without restricting the radiator. Since winter is approaching Chicago, we will not be able to do much testing now, but will push this unit to its limits when the warmer seasons return.

Ideally, oil temps on this 3S-GE should be between 180-200F, and 160F is considered fully warmed up and safe for WOT. 220F is hot, and any prolonged periods over 230-240F are dangerous. We are looking forward to seeing how this cooler will perform, and will try different driving conditions and report our findings.

Along with the brand new oil cooler, we had the opportunity to have Koyo provide us with the first AE86 radiator catered for hachi-rokus with either Beams/F20C/F22C engine swaps. Unlike the standard AE86 radiator, this model has a repositioned radiator neck allowing a more direct flow to those engines.

Check back with us soon to take a look at our next AE86 build! Here are some clues: AE86, F20C engine and trans, and Koyo products!