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      05-26-2011, 10:04 AM   #1
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Question A performance radiator rumor???

I heard something about BMW performance radiator for 335i.
Which one is a better investment?
1. A bigger FMIC
2. That rumored performance radiator.

I don't want to hear someone says both.
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      05-26-2011, 10:10 AM   #2
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FMIC. The radiator will help cool water pump etc which is prone to failing if pushed hard, but performance wise the FMIC will be noticeably more effective than the radiator. Not even sure if there will be any noticeable differences with a radiator on teh butt dyno.
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      05-26-2011, 10:11 AM   #3
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I think AR makes an aftermarket radiator don't they? It may be a different vendor, but I believe there is something on the market right now.
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      05-26-2011, 10:15 AM   #4
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Thses two items serve different purposes. A FMIC cools the intake air. Which gives more power.

The performance radiator taken from the Bmw power kit helps keep the engine cool to increase reliability.

I don't think the AR aluminium radiator is available anymore. They sold next to none due to the high price tag.
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      05-26-2011, 10:49 AM   #5
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Quote:
Originally Posted by Autobahn335i View Post

I don't think the AR aluminium radiator is available anymore. They sold next to none due to the high price tag.

News to me.
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      05-26-2011, 10:51 AM   #6
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Quote:
Originally Posted by ar design View Post
News to me.


Just because it wasn't mentioned on the forums doesn't mean they didn't sell. I'm sure the FBO, upgraded turbo guys, or even those seeking better cooling bought some.

AR Design quality it next to none, top notch.
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      05-26-2011, 10:54 AM   #7
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PWR makes a radiator for the 335i also. its not quite as huge as the AR radiator but larger than stock all aluminum and very nice looking piece. its also quite pricey but its true you get what you pay for.
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      05-26-2011, 11:18 AM   #8
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Quote:
Originally Posted by ar design View Post
News to me.
So was it redesigned to ensure proper fitment? Is it now available for AT? There's no info on your website unfortunately
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      05-26-2011, 11:22 AM   #9
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Quote:
Originally Posted by Autobahn335i View Post
So was it redesigned to ensure proper fitment? Is it now available for AT? There's no info on your website unfortunately
+1 the fitment wasn't good at all, and the price still high.
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      05-26-2011, 02:01 PM   #10
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Didn't the guy with the alpina3 have all sorts of issues with is AR radiator not fitting and leaking? I haven't heard much about it since.
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      05-26-2011, 03:38 PM   #11
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Quote:
Originally Posted by BMWeber View Post
PWR makes a radiator for the 335i also. its not quite as huge as the AR radiator but larger than stock all aluminum and very nice looking piece. its also quite pricey but its true you get what you pay for.
Do you have a link or any info?
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      05-26-2011, 03:39 PM   #12
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Quote:
Originally Posted by Autobahn335i View Post
So was it redesigned to ensure proper fitment? Is it now available for AT? There's no info on your website unfortunately
+2..
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      05-26-2011, 03:47 PM   #13
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Quote:
Originally Posted by BMWeber View Post
PWR makes a radiator for the 335i also. its not quite as huge as the AR radiator but larger than stock all aluminum and very nice looking piece. its also quite pricey but its true you get what you pay for.
nice find! lets see if the price is not too crazy
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      05-27-2011, 12:54 AM   #14
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If you live in a state where temp are mostly high during the year then the BMW rad upgrade to a bigger fan and an additional rad would be a good way to go.

If you live in a state where it is mostly mid - low temps yearly then its not worth it.
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      05-27-2011, 01:58 AM   #15
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Quote:
Originally Posted by BMWeber View Post
PWR makes a radiator for the 335i also. its also quite pricey but its true you get what you pay for.
Did anyone mail PWR about the radiator? I'm a bit afraid to do so, as my mod list is wayyyy too long already
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      05-27-2011, 02:28 AM   #16
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i did we will see. And concerning the need it all depends what you intend to do with the car. For track days its needed IMHO.
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      05-27-2011, 03:23 AM   #17
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Quote:
Originally Posted by enrita View Post
i did we will see. And concerning the need it all depends what you intend to do with the car. For track days its needed IMHO.
Yes I will track the car regularly this year, so it would be a nice upgrade. BTW, have you been able to source a tranny cooler?
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      05-27-2011, 03:55 AM   #18
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Quote:
Originally Posted by clairvoyant View Post
I heard something about BMW performance radiator for 335i.
Which one is a better investment?
1. A bigger FMIC
2. That rumored performance radiator.

I don't want to hear someone says both.
Thank You
I think this rumor is started by you
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      05-27-2011, 04:02 AM   #19
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Quote:
Originally Posted by Autobahn335i View Post
Yes I will track the car regularly this year, so it would be a nice upgrade. BTW, have you been able to source a tranny cooler?
nope , not yet. Its either a better radiator or a tranny cooler. Was thinking to use the AR oil cooler in front of the radiator for the tranny but still no answer from AR on this subject. I could delete the exchanger and just run some oil lines to that and would increase also capacity.
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      05-27-2011, 09:01 AM   #20
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Quote:
Originally Posted by Alan l. View Post
Didn't the guy with the alpina3 have all sorts of issues with is AR radiator not fitting and leaking? I haven't heard much about it since.
I assume you mean me.

Yes, I had two issues with it.

1) Fitment issue

It started with the radiator not fitting - the connector on the passenger side interfered with the intercooler tubing. There was no way that it could be made to fit, safe removing and redesigning all intercooler tubing which I obviously did not want to do as it would have been even more of a hassle. Also, it seemed that in such case there would not be any wriggle room at all for the intercooler tubing, and it couldn't compensate for engine movements or largening of the tubes in size at full boost.

So the radiator had to be uninstalled, the stock radiator installed again, and the interfering connector had to be cut off and another connector slightly higher and at a steep upwards angle had to be welded on. More time, more $$$ spent.

At least then it fit - even if the fitment was still not ideal, but I could live with that. As it was autumn at the time (this happened between end of July and September), I was not able to verify the efficiency of the radiator by going on the track. I noticed, however, that the engine took between 2-3 times as long as usual to get to its normal operating temperature, whereas the oil temperature changes while driving hard did not seem to be impacted - the oil temperature even seemed to rise higher than before while driving normally, reaching 125 degrees Celsius while driving in the city with 10 degrees outside temperatures. Anyone's guess why that is, but to me it didn't seem ideal - just as if the huge volume of the radiator, once heated up, transferred its heat more easily to the engine bay and the oil cooler.

2) Leakage

Then a few weeks ago the radiator started leaking, after having driven around 10.000 km with it installed. I noticed this first by the dashlight with the "low coolant" warning coming on; after driving to my garage who installed it, they took off the undertray of the front end and it was full of coolant.

My first assumption was that due to the rewelding it leaked now at these places; however, that was not the case.

Looking inside the engine bay from under the car it was visible that coolant had leaked out of apparently two places in the mesh on the backside of the radiator. Which is unfortunate, because this is a place where you can't repair it, unlike the places where it had been rewelded.

The radiator had to be taken out again and replaced with the stock radiator. It sits now in my garage's storage place and is in essence a pile of 1000 USD aluminium scrap metal.

You can imagine that I was not happy at all - aside from the rather high initial price tag (which I still believe is justified if the thing actually fit and worked), I had to spend hundreds of $$$ on the various installs and uninstalls, plus the downtime of the car.

I am of course rather disappointed with AR Design - in particular as I've had all of their previous products (oil cooler, catch can, downpipes) and was quite happy with their quality and fitment. I have written to AR Design about it, but received no answer from their end until now.

EDIT: I have received word from AR Design that they will replace the radiator. That is good customer service.

Once I have received it and tested it further I will write up a detailed report on it. I hope that it will now fit and will not leak - but if AR Design say they've changed the design and use a different core manufacturer, I am confident with this.


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      05-27-2011, 09:09 AM   #21
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^^ that truly does suck. Seems like they just re-branded something (albeit padded the price nicely) and pushed it out into the market with out really testing it. The fitment issues that you experienced would have been obvious and shouldn't have been sold to anyone.
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      05-27-2011, 09:23 AM   #22
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Quote:
Originally Posted by Alan l. View Post
^^ that truly does suck. Seems like they just re-branded something (albeit padded the price nicely) and pushed it out into the market with out really testing it. The fitment issues that you experienced would have been obvious and shouldn't have been sold to anyone.
and remember, alpinab3 lives in europe, shipping cost LOTS to ship stuff from the US to europe, ask me...
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