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 Post subject: Re: alloy radiators
PostPosted: Sun Oct 27, 2013 10:59 pm 
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Joined: Sun Sep 24, 2006 7:19 pm
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Location: Basingstoke
Car Model: ST185
Lou no one is saying the stock rad isn't good , but in my case at the time running a 14 year old turbo'd car on increased boost it seemed prudent to try to better (rightly or wrongly) the cooling , as I didn't have any issues I deemed it worthwhile and a good investment . Maybe 260 isn't an awful lot of ponies to some but to others its a fair bit , more than the engine was putting out from the factory and every little helped to keep it in one piece .
I now have a stock rad and running 1bar , aftermarket gauge temps are only above 85deg when in traffic . Had I had a more reliable gauge in the past maybe i could draw a comparison between rads ?

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 Post subject: Re: alloy radiators
PostPosted: Sun Oct 27, 2013 11:12 pm 
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that's what I mean a good named ally rad will cost you £250+ were as a new stock rad is only £98 and cooler better than most of the big ally rads , it just seems that cos others have fitted a big ally rad then they must be what you have to do,

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 Post subject: Re: alloy radiators
PostPosted: Sun Oct 27, 2013 11:50 pm 
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mixer72 wrote:
that's what I mean a good named ally rad will cost you £250+ were as a new stock rad is only £98 and cooler better than most of the big ally rads , it just seems that cos others have fitted a big ally rad then they must be what you have to do,


This sort of thing happens remarkably often.

Silicone hoses, for example. I've had these fail within a handful of years, while most OEM Toyota hoses are still ok after 20 years.

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 Post subject: Re: alloy radiators
PostPosted: Mon Oct 28, 2013 6:06 pm 
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took a few photos of my temps today, this is after a 30min drive and stuck in slow traffic
Image
Image

then a 70mph for after being stuck in traffic

Image
Image

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 Post subject: Re: alloy radiators
PostPosted: Mon Oct 28, 2013 6:24 pm 
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Location: Camberley, Surrey
Car Model: ST205
You appear to be driving along with your door open. :)

Water temp looks good, much the same as mine using a Koyo radiator.

Your oil temps look pretty low however.

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 Post subject: Re: alloy radiators
PostPosted: Mon Oct 28, 2013 6:55 pm 
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door switch is stuck on lol oil temps sit at about 60-70c and that's with the oil cooler covered, I only un cover the cooler when im on track, if im on the road with out the oil cooler cover on the temps done go over 50c and that's with a thermostat plat in it as well

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 Post subject: Re: alloy radiators
PostPosted: Tue Oct 29, 2013 12:29 am 
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Location: Perth, Western Australia
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Interesting info Lou, thanks for sharing!

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 Post subject: Re: alloy radiators
PostPosted: Tue Oct 29, 2013 9:11 pm 
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Are the pics on page 1 of ASI rads (56 mm)?

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 Post subject: Re: alloy radiators
PostPosted: Tue Oct 29, 2013 11:28 pm 
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Location: sunny sleaford- lincolnshire
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Got to say I run the stock rad and don't have any problems as of yet, but then after a long hard track session the fans are instantly on once I come into the pits.

My brother runs a Koyo and a 3071 with over 400bhp and after some serious hammering on track it's never had a problem so cant say I think there are any problems with the koyo.

One other fact is that there is so much more coolant in the koyo surely which can only be a good thing surely?


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 Post subject: Re: alloy radiators
PostPosted: Tue Oct 29, 2013 11:55 pm 
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dale wrote:
Got to say I run the stock rad and don't have any problems as of yet, but then after a long hard track session the fans are instantly on once I come into the pits.

My brother runs a Koyo and a 3071 with over 400bhp and after some serious hammering on track it's never had a problem so cant say I think there are any problems with the koyo.

One other fact is that there is so much more coolant in the koyo surely which can only be a good thing surely?

More coolant is only a good thing to take longer to get up to temp but once there it doesnt matter if there is 3 ltr or 33ltr the thermostate holds it at a constant temp. It only flows at the same rate no matter how much is there, and with the rad being that much thicker the water at the back of the rad does not have enough time to cool before moving out hense holding more heat.

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 Post subject: Re: alloy radiators
PostPosted: Fri Nov 08, 2013 4:16 am 
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Location: Germany
Car Model: ST185 CS/RC
Bought my CS back in 2008 with a nearby new standart rad. Covered harsh driving without causing problems. But I replaced it by an Mishimoto alloy rad as the plastic water housing of the stock rad has started to bleach out from the sun. Have seen more than one stock rad collaps on blowen plastic housings on ST205 to wait therefor so I've decided to buy a alloy one.

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 Post subject: Re: alloy radiators
PostPosted: Fri Nov 08, 2013 9:27 pm 
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Location: Perth, Western Australia
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Very true! The stock ST205 rad plastic top tank will eventually bleach and start to show micro fractures.

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 Post subject: Re: alloy radiators
PostPosted: Fri Nov 08, 2013 9:39 pm 
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Thats when you fit a new 1 lol

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 Post subject: Re: alloy radiators
PostPosted: Fri Nov 08, 2013 9:56 pm 
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So far the secondhand standard rad I fitted to my 205 has outlasted the alloy rad on my 185. It didn't bleach, it just rotted.

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 Post subject: Re: alloy radiators
PostPosted: Fri Nov 08, 2013 10:37 pm 
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think most new stock rads if looked after with good coolent will last as good 20+years

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Last edited by mixer72 on Sat Nov 09, 2013 12:21 am, edited 1 time in total.

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