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Old 01-30-2019, 06:08 PM   #1
WhiteZombie
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Default Best value radiator that just might see some HPDE action?

Hey everyone,

My stock radiator sprung a leak recently and need to replace ASAP.

I mayyyyyy possibly do some open track HPDE and/or autocross in my WRX wagon, but mostly just daily duty and twisty touge runs. I already have a dedicated track car, so if it's only a few more bucks for a more efficient radiator that would perform better at the track, I'm about it, you know, just in case.

I had a very strong recommendation from someone that was Koyo or Mishimoto, but can't remember which one was good and which he said was not good.

Thoughts? Are those overkill for a stock thermostat car that may never actually see a 20-30 minute session?

Thanks!
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Old 01-30-2019, 07:08 PM   #2
kwiksti
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Can't go wrong with either Koyo or Mishi. The latter does have lifetime warranty if I recall. I would def upgrade if you have to replace a leaking OEM. Why not?
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Old 01-31-2019, 07:42 AM   #3
mav1c
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I'd recommend Koyo over Mishimoto.

I had a brand new Mishimoto radiator leak. Tiny hole/gap in the weld. Switched to a Koyo and no problems at all.
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Old 01-31-2019, 10:19 AM   #4
Kostamojen
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Go with Koyo.
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Old 01-31-2019, 12:51 PM   #5
WhiteZombie
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Quote:
Originally Posted by mav1c View Post
I'd recommend Koyo over Mishimoto.

I had a brand new Mishimoto radiator leak. Tiny hole/gap in the weld. Switched to a Koyo and no problems at all.
Quote:
Originally Posted by Kostamojen View Post
Go with Koyo.
Thanks! Pretty sure it was Koyo that was strongly recommended to me over the Mishimoto.

Dialed fitment on the Koyo? No special mods needed? I've read may have to trim the upper rad hose a bit, only because it's thicker overall?

Have you guys seen any appreciable decrease in coolant/oil temps on track between a stock and Koyo, all else being equal?
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Old 01-31-2019, 02:16 PM   #6
jamal
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Generally with any aftermarket radiator you'll want to make sure there's sufficient clearance between the upper hose, fans, and p/s pulley. So yes maybe a little trimming, especially for driving on track. Stiffer drivetrain mounts, especially a pitch stop, also help.

Also the koyo vh does use a higher quality core that is a little thinner than the old version and mishimotos which will improve clearance to the fans.
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Old 02-01-2019, 12:01 PM   #7
WhiteZombie
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Thanks everybody!

A buddy hooked me up with a Koyo, out for delivery today. Hopefully the UPS driver leaves it on the stoop with nobody home......
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Old 02-02-2019, 10:26 AM   #8
WRXnick16
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Good choice. I've had both and the Koyo was definitely better quality and fitment.
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Old 02-04-2019, 10:26 AM   #9
WhiteZombie
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Radiator and thermostat install went well, but unfortunately it turns out the water pump is completely locked up, causing my overheating issue. Timing belt just slips across the WP pulley! Luckily head gasket gas tester still shows no exhaust in coolant. Going to be doing the timing belt/water pump kit about 10k early, but could be worse!


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Old 02-12-2019, 08:19 PM   #10
Paisan
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Koyo!

-mike
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