Intercooler external temp? - Defender Source
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  #1  
Old July 24th, 2014, 09:35 PM
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peter
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Intercooler external temp?

General question: Does anyone know what kind of temps an intercooler on a defender 300 tdi (or any turbo really) gets to externally? Looking for foam to fill the gap between the rad and the intercooler but want to make sure the foam is up to the job.
Thanks,
Pete
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  #2  
Old July 24th, 2014, 09:54 PM
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Why would you use foam to block the airflow to the rad? Or is the the 300 tdi side by side setup?
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Old July 24th, 2014, 10:24 PM
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I don't mean to question your motives, but like Jason said, why? Trying to get rid of a rattle/vibration? Otherwise, I'd leave it alone, or maybe glue some rubber or something. Anytime I see expandable foam anywhere near an automotive repair, it makes me cringe.

That said, I don't think the IC gets as hot as the radiator. Of course the lower inlet pipe will run hot, but the body of the IC should be less hot than the radiator. Stock t-stat on a 300 is 190 degrees correct? So I'd say that it's gotta withstand that.

Still, I will go on record as humbly suggesting that you reconsider what you're doing....with all due respect
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Old July 24th, 2014, 10:43 PM
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Quote:
Originally Posted by Jtomchik View Post
Why would you use foam to block the airflow to the rad? Or is the the 300 tdi side by side setup?
The factory setup is side by side.

Quote:
Originally Posted by Jackie Treehorn View Post
I don't mean to question your motives, but like Jason said, why? Trying to get rid of a rattle/vibration? Otherwise, I'd leave it alone, or maybe glue some rubber or something. Anytime I see expandable foam anywhere near an automotive repair, it makes me cringe.

That said, I don't think the IC gets as hot as the radiator. Of course the lower inlet pipe will run hot, but the body of the IC should be less hot than the radiator. Stock t-stat on a 300 is 190 degrees correct? So I'd say that it's gotta withstand that.

Still, I will go on record as humbly suggesting that you reconsider what you're doing....with all due respect
Any air that is going in-between or around the radiator or intercooler is air that is not going through them. You want as much air flow as possible through both of them . IIRC when I replaced my 300 Tdi radiator, there was foam between the two, but I may be mistaken.
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Old July 24th, 2014, 10:48 PM
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I see. Good point. Is there that much of an efficiency factor in the systems? (Where max airflow is that important?)
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Old July 24th, 2014, 10:51 PM
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Originally Posted by Jackie Treehorn View Post
I see. Good point. Is there that much of an efficiency factor in the systems? (Where max airflow is that important?)
Probably not, but people make a big deal about it on V12 Jags, which I have owned a few of. As a side note, most Land Rovers (newer) have foam around the outside of the radiator and other plastic bits to direct air flow through the radiator/condenser, rather than around it.
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Old July 24th, 2014, 11:05 PM
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It's definitely beneficial to have the sides and the gap between them on the outer circumference..sealed up... Think of like sucking air through a straw.. If you have some holes along it the air will be sucked through the path of least resistance.. And that is usually the one after the cooler.. As mentioned... There's a reason all rads have the sides sealed up and close fitting shrouds....driving down the road it is not as important,. But that's not when you need the best efficiency of air flow...I guess the temps would be subject to the ambient temps and how hard the turbo is having to work...I would be inclined to use just about any high density foam and cut to suit..
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Old July 24th, 2014, 11:22 PM
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Thanks for all the posts guys. Shayne and Jimmy cleared up what's going on. I have some closed cell Dynamat that says it's rated to 225F laying around. I figured that's pretty close. But I never really knew what an intercooler would see for temps. So that's why I was asking.
Thanks!
Pete

To add, I had my intercooler rebuilt at a local shop and there used to be foam on it. Really crapy looking foam actually. Not because it was old, just seemed real weak.
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