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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 Wed, Aug-02-2017, 01:04:49 AM   #21
M3AT
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Default Re: Koyo radiator experience?

Quote:
Originally Posted by WOLFN8TR View Post
My M3 does the same going up hill under load now with the Electric Fan, didn't do this with the Mechanical Fan.




Look at LAWlence's fan mounting bracket.

http://N15 Design E46 M3 Electric Fa...5&share_type=t
Thanks for the tip, but the link didn't work for me :/
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Old Wed, Aug-02-2017, 01:12:14 AM   #22
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Default Re: Koyo radiator experience?

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Originally Posted by M3AT View Post
I checked my radiator and the inlet path is totally clear with no blockage.
I think the exit port was the one in question a few years back with the CSF.
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Old Wed, Aug-02-2017, 01:21:50 AM   #23
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Default Re: Koyo radiator experience?

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Originally Posted by M3AT View Post
Thanks for the tip, but the link didn't work for me :/
Sorry, fixed it.
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Old Wed, Aug-02-2017, 01:22:31 AM   #24
M3AT
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Default Re: Koyo radiator experience?

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Originally Posted by Move_Over View Post
I think the exit port was the one in question a few years back with the CSF.
The outlet path looks clear as well, sorry for lack of clarity
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Old Wed, Aug-02-2017, 01:41:59 AM   #25
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Default Re: Koyo radiator experience?

Koyorad Radiator
http://www.m3forum.net/m3forum/showt...yorad+Radiator

Quote:
Originally Posted by hemi8 View Post
Finally installed an all aluminum radiator, went with a Koyorad. The fit was dead-on perfect, nice welds, excellent quality, cools beautifully. Highly recommend.
Quote:
Originally Posted by Joefresh View Post
I have had nothing but good results with koyorad aluminum radiators in my cars. if koyo prices the e46 m3 radiator like they do their other products it shouldnt be much more than OE bmw radiator.
to me thats a no brainer but i have experienced their product on my other vehicles which were turbo.
might be over kill but thats my style
Quote:
Originally Posted by Treflip View Post
Another happy Koyorad user here too. I've had mine in for over a year without a single hiccup. Highly recommended.

Koyorad is pleased to introduce a high quality direct replacement all aluminum performance radiator for 2001 through 2006 BMW M3 E46 chassis. This application features Koyorad's “HH Series” high density, two row 48mm radiator core which was developed to increase coolant volume, promote proper air flow and coolant circulation. In typical fashion, Koyorad has engineered this radiator with precision, directly replacing the stock OEM plastic/aluminum radiator and will bolt easily to the factory equipped fan shroud for a quick and simple installation. Koyorad’s superior quality, precision hand welds, reliability and uniformity are what have earned Koyorad their excellent reputation in performance cooling worldwide.

All radiators are fully polished to a mirror finish. Each feature the following:
- Provides 20% to 30% more cooling than standard radiators
- Handles high revving, high performance motors
- Perfect for Turbocharged, Supercharged & Nitrous Oxide equipped engines
- Made from aircraft quality aluminum and Heli-arc welded, cores are NOCOLOK-brazed (no epoxy)
- Koyo is on the cutting edge of technology and design with Japan's largest automobile manufacture
- Custom built OEM fit - All radiator cores and tanks are specifically designed and built for each application. No universal fit parts are used. This ensures proper fit, just like your original equipment! Koyo builds radiators to fit today's most popular import performance cars.



Price went up from $422 to $436.



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Old Wed, Aug-02-2017, 01:51:12 AM   #26
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Default Re: Koyo radiator experience?

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Originally Posted by WOLFN8TR View Post
I would just leave the AUX Fan as it flows way more air than the Mishi Fan.
This is true, I may just make the DME adjustments and leave it at that until there's a problem, or wire the Mishi up as a secondary.
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Old Wed, Aug-02-2017, 03:58:35 AM   #27
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Default Re: Koyo radiator experience?

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Originally Posted by djjvr View Post
This is true, I may just make the DME adjustments and leave it at that until there's a problem, or wire the Mishi up as a secondary.
I'm running the Aux Fan with a Mishi mounted inside the stock fan shroud. It works good in stop and go traffic but on the highway under load it starts to heat up. That's in Vegas heat of 110+ thou.
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TTFS Engine/SMG Tune - SGT Headers/Sect 1/SCZA - Evolve Eventuri
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Old Wed, Aug-02-2017, 05:32:32 AM   #28
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Default Re: Koyo radiator experience?

I am in a similar position to the OP, and I posted this thread with all the options currently available. http://www.m3forum.net/m3forum/showthread.php?t=590565

I was also leaning toward the Koyorad, but it seems that the periodic hot-running sessions can't be avoided, even with the best kits out there. So it makes me think the stock unit is still pretty darn good. Plus, the prices have risen on the Koyo, which makes it a bit less attractive in terms of value.

Also, all radiators will eventually accumulate gunk and debris on the outside, so I'm more inclined to replace a cheap(er) stock unit than an expensive aftermarket piece.
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Old Wed, Aug-02-2017, 05:33:25 AM   #29
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Default Re: Koyo radiator experience?

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Originally Posted by WOLFN8TR View Post
I'm running the Aux Fan with a Mishi mounted inside the stock fan shroud. It works good in stop and go traffic but on the highway under load it starts to heat up. That's in Vegas heat of 110+ thou.
To be fair nothing should be alive at that point...

Kidding. How are you managing the fan speed of the Mishi?
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Old Wed, Aug-02-2017, 08:24:15 AM   #30
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Default Re: Koyo radiator experience?

Quote:
Originally Posted by speeeding View Post
I am in a similar position to the OP, and I posted this thread with all the options currently available. http://www.m3forum.net/m3forum/showthread.php?t=590565

I was also leaning toward the Koyorad, but it seems that the periodic hot-running sessions can't be avoided, even with the best kits out there. So it makes me think the stock unit is still pretty darn good. Plus, the prices have risen on the Koyo, which makes it a bit less attractive in terms of value.

Also, all radiators will eventually accumulate gunk and debris on the outside, so I'm more inclined to replace a cheap(er) stock unit than an expensive aftermarket piece.


Exactly. So many had alread failed at even matching the OE performance and later on made revisions to "fix" it.

Koyo is still well priced anf a highly regarded brand, but we need more accurate feedback to judge its performance, possibly from those tracking it and who otherwise had problems with a fresh OE rad keeping up.
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Discussing Koyo radiator experience? 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)