AB Flug water by pass...

Cya

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Aug 12, 2005
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The A-Duct is also sold here as well.....Horsepower freaks can get it but you have to ask for it as it has to be imported.
 

drjonez

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Mar 31, 2005
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Cya said:
The A-Duct is also sold here as well.....Horsepower freaks can get it but you have to ask for it as it has to be imported.

not the OEM turbo A duct....just ABflug's knock off. it's fiberglass, but certainly the best knock-off you'll find.
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
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K it works like this: bypasses coolant from the front radiator hardpipe to the water union at the back of the head. You know, that pipe in the top centre of the back. In the kit you get that section with a nipple on each side and oyu put that into the hose by cutting some space for it, then clamping the hose back on each end. So it's a really trick piece of kit actually.
eric
 

supra90turbo

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Mar 30, 2005
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Eric: OK, now I understand where it goes, but I'm still unsure as to what it's supposed to do? What task does it perform, and why is it worth bypassing coolant around?
 

Stretch

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Alright, so I actually had to look at the cooling diagram to verrify wtf this was for since the flow pattern is wrong for it to work the way I would prefer it too ahahaa. AbFlug says that this hose helps carry water from the heater hose to the front to lessen the build up of heated coolant aorund the rear of the engine, since we all know No. 6 cylinder runss pretty hot anyway, this bypass just helps reduce that heat so it runs a tad better. AbFlug reccomends it for circuit racing. You can easily make the parts yourself tho, they even use Earl's hardware in their kit so just do it yourself for cheaper.
eric

Ninja Edit:
if I was to do one better I would have it positionned at the return hose coming from the radiator instead of the one going towards the rad. That way cooler coolant would be chanelled directly towards the rear of the block/head. It would have to tap into the rear of the head at some spot most preferably on the cold side of the engine. Just have to figure out where the cooling passages are and then you can tap
I have a unk head at home and i never realized what I could do with it and maybe this would be something cool to find out. How to cut such a large chunk of aluminum tho hmmm ahahaa.
eric
 

Cya

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I think it's cool (no pun intended). But to do one better I want to make some type of block off so that it will by pass the heater core all together when racing and be able to switch it back when not. I can see the part in my head but dont know the proper name for it.
 

Stretch

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mattjk said:
better yet, weld up the egr hole to the exhaust port and turn it into a coolant passage.

That's a pretty slick idea matt, could you elaborate on it? I just had class so my brain is burnt for now :icon_razz
eric