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Curious about the caps.

Does the stock heat exchanger greatly restrict the flow of water?
If so I could see how a bypass method of water might be a bad idea.

If stock heat exchanger doesn't restrict water flow, wouldn't cooling be increased with bypassed water lines? More water in system, plus a bit of cooling effect from the hose?
 

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Discussion Starter · #26 ·
The stock heat exchanger has a water supply running through it. When the heat exchanger pops you first get oil in the water and then if you don't drop the oil and water immediately you get water in the oil and a fubar engine. The billet heat exchanger has no water running through it. The HE has fins on it like a small rad to cool the oil inside rather than the water from the rad cooling the oil. So you have to blank the two pipes off that went to the stock HE. Some people just use a bit of tubing to connect the two redundant pipes together. That's fine so long as you use sold bar as you no longer want wanted flowing through this pipes and returning half way up the radiator. Take a look at the new 675 ST hoses and you will see they have done away with the return hose that went from the HE to the middle R/H side of the rad. It now returns into the bottom L/H hose.

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Righto. Thanks for the explanation.

I'm more curious about capping the lines vs. a bypass set up.

I think you mentioned that the need capped or water will run too hot. Just interested in why? Trying to decide which route to take.

The stock heat exchanger has a water supply running through it. When the heat exchanger pops you first get oil in the water and then if you don't drop the oil and water immediately you get water in the oil and a fubar engine. The billet heat exchanger has no water running through it. The HE has fins on it like a small rad to cool the oil inside rather than the water from the rad cooling the oil. So you have to blank the two pipes off that went to the stock HE. Some people just use a bit of tubing to connect the two redundant pipes together. That's fine so long as you use sold bar as you no longer want wanted flowing through this pipes and returning half way up the radiator. Take a look at the new 675 ST hoses and you will see they have done away with the return hose that went from the HE to the middle R/H side of the rad. It now returns into the bottom L/H hose.

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Discussion Starter · #28 ·
I've not got a degree in thermodynamics so I can't explain why but we know from experiences that its better to cap these hoses than to connect them and let water run through them. My only explanation would be you don't want to return hot water halfway up the rad as you are not getting the full effect of the radiator. So you cap the pipes and all the hot water is forced to return to the bottom of the rad.

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That's a mighty fine explanation of your methods. Thanks sir.

I've not got a degree in thermodynamics so I can't explain why but we know from experiences that its better to cap these hoses than to connect them and let water run through them. My only explanation would be you don't want to return hot water halfway up the rad as you are not getting the full effect of the radiator. So you cap the pipes and all the hot water is forced to return to the bottom of the rad.

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I think if the amount of interest here turns out to be sales, then maybe everyone should get 1 for 75 pounds, whithout having to split with someone else?
I ordered two because I have a friend that wants one too.
Just my 2cents.

Nuno!
 

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So what then is the difference between this one and the race version? Also, how much is the race version?
 

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Discussion Starter · #39 ·
This is the full race version


There has been a lot of chatter about ours on other website about ours being so cheap! What we say is:
1. UK made, in house to keep costs down
2. Highest grade alloy available (T7068 alloy is a very modern development. It was developed circa 2000 by Tennalum, Inc. for aerospace and military applications. 7068 has an extremely high tensile strength, and this enables it to exceed the strenght-to-weight ratio of nearly all engineering alloys. 7068 alloy is greater than twice the yield strength of most common aluminum alloys. It has 33% better strength to weight ratio than 7075 alloy (true aircraft aluminum), and 28% better performance than 6AL 4V Titanium. For many applications, there is no better alloy, not even Titanium.)
3. Light weight
4. Extra cooling fins
5. Hard anodised
6. Disperses heat far better

All our design work is commissioned by us and done by a top BMW designer.
We have contacts in the right places.
 
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