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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Feb-07-2017, 03:02:08 PM   #1
M3AT
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Default Koyo radiator experience?

Hi all, I'm looking to replace my oem radiator as part of the cooling system refresh. I've been getting into tracking a lot lately and would like to upgrade my radiator while I'm at it. Does anyone have any experience with tracking koyo's radiator? I couldn't find much info on it. Thanks
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Old Tue, Feb-07-2017, 08:17:55 PM   #2
poms302
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Default Re: Koyo radiator experience?

http://www.m3forum.net/m3forum/showt...post1067297064

Starts around post 300.
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Old Tue, Feb-07-2017, 09:23:54 PM   #3
M3AT
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Default Re: Koyo radiator experience?

Thank you! Seems to have worked out for him, I wondered if there was any more long term results
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Old Wed, Feb-08-2017, 05:46:04 PM   #4
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Default Re: Koyo radiator experience?

Quote:
Originally Posted by M3AT View Post
Thank you! Seems to have worked out for him, I wondered if there was any more long term results
At Chuckwalla in a really hot 100* track day I rode with Tony and the car did heat up, but was much more resistant to it than my car (Mishimoto rad), add that to the fact he was running 10 seconds a lap faster than me. So obviously stressing it just a touch more. I think the Koyo is up there with the other aftermarket brands that are out there. It will be my next choice, due to their support of our Bimmer Challenge Series, the affordable price, and the quality of the unit itself. It will replace my Mishimoto.
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Old Wed, Feb-08-2017, 05:53:24 PM   #5
M3AT
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Default Re: Koyo radiator experience?

Can you clarify how much it heated up? Like how far past 90 degrees on the stock gauge? Thanks for the reply
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Old Mon, Jul-31-2017, 09:02:52 PM   #6
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Default Re: Koyo radiator experience?

Bumping this thread as I'm also looking for some more feedback on the Koyo radiator. I've read nothing but good reviews on this rad (Koyo is also well known in the JDM scene) but I'm specifically interested in knowing whether it provide better cooling compared to a new OE unit.

The data supports it (47 vs 42 rows, 48mm core) and the price is right, but in real life how does it compare to other rads?
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Old Mon, Jul-31-2017, 10:10:12 PM   #7
WOLFN8TR
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Default Koyo radiator experience?

I'm considering a Koyorad radiator as well. Read nothing but positive comments on this radiator.

Koyorad
http://www.koyoradracing.com/news.asp?id=143

Amazon has them for $422 Shipped.






TREFLIP







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KOYORAD




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Old Mon, Jul-31-2017, 11:08:59 PM   #8
hemi8
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Default Re: Koyo radiator experience?

Mine works great in the blistering 100 degree DC nightmare bumper to bumper beltway traffic, cool as ice and I'll never have to screw with the rad ever again.

Mike
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Old Mon, Jul-31-2017, 11:52:24 PM   #9
Speed Monkey
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Default Re: Koyo radiator experience?

The online magazine/blog called MotoIQ did a full write-up and review on the Koyo radiator.

It is here: http://www.motoiq.com/MagazineArticl...tallation.aspx

I'd go this route before buying a POS CSF unit; on this forum, a Forum Member (can't remember the Member's name) who had a fooked-up CSF radiator, which eventually led to a blown motor. CSF's Owner chimed in and basically wrote something to the effect of: "Yup, my janky radiator blew your motor up... Good luck in putting your motor back together because I got my Teflon suit on." (Not really like this at all but ya get my drift... )
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Old Tue, Aug-01-2017, 10:27:08 AM   #10
silaciM3CS
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Default Re: Koyo radiator experience?

Quote:
Originally Posted by WOLFN8TR View Post
Amazon has them for $422 Shipped.

Koyorad HH422675 Radiator
Redline360 has it for $395

Quote:
Originally Posted by hemi8 View Post
Mine works great in the blistering 100 degree DC nightmare bumper to bumper beltway traffic, cool as ice and I'll never have to screw with the rad ever again.

Mike
Were you having problems before installing the Koyo rad? What was the state of your cooling system before that? When you say "cool as ice", have you actually monitored your temp readings?

I'm not doubting, just looking for more info on this rad.
The reason I ask is that a refreshed OE system should perfectly be fine in 100 degree bumper to bumper traffic.

Koyo should theoretically outperform the OE rad on the track, or in spirited driving in the extreme summer heat. But my thinking is that if it's as good as OE, then why bother. It should actually be better and be more efficient at cooling for me to consider it, and that's the kind of info I'm looking at.
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Discussing M3 SMG pump reconditioning in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)