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#2
June 2nd 2009, 13:57
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Great pix Wally. Looks like a great track day was had by all.
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NO_H2O 72 1302 Smack Black GL 73 Bus (2L CIS Powered) 66 Beetle, 73 Standard Beetle 72 Pinzgauer 710M Volksport Kafer Gruppe 
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#3
June 3rd 2009, 13:50
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Today I redid my intake tubing of the turbo inlet.
The turbo inlet itself is a 56mm outside diameter, but I only had 50mm silicon 90 degree tubing at the time I made the 2 ltr turbo engine and did forced that one on there... I now finally found the time to get a 60mm bend 90 degrees and that fitted much more easy  57mm bends can be ordered, but 60mm was on stock and now the more readily available 60mm tubing fitted better. So I got some drain-pipe 60mm tubing and 45 degree bends and started fabbing up the new intake:  I think the cheap plastic even isolates the high radiant heat from the engine better than stainless or alu intake piping. Its also lighter than the previous 2" stainless pipe and the 20% larger intake diameter has a wopping 44% more intake area! I dunno if this will make a huge difference (probably not at 14.5 psi), but I do know its better to have the intake tubing at least not smaller than the turbo inlet diameter.
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#5
June 4th 2009, 06:34
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Hi Wally,
If its standard pvc drainpipe then be aware it will start to soften at relatively low temperatures, generally around 60degC + at which point they will lose their structural integrity. I would guess the engine bay could easily get to those temps on a hot day, standing at idle after a hot run. It is quite common for turbos in the heat of battle to glow red hot so there is bound to be excess heat floating around. I would think that a stainless tube was the best material as stainless does not transfer heat comparitively that well. The luxury material would of course be CF! Clive
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#6
June 4th 2009, 08:21
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Good info and post evilClive!
 I agree on the stainless (what I had), but i cannot find 60mm stainless tubing over here unfortunately and really wanted to open up the intake NOW! Maybe some heat-wrap will keep things at a safe level a bit longer. Alu is too well conducting imo and I cannot weld it together..hence the hard plastic. Most OEM manufactors also use some sort of plstic for intakes and what more under the hood afaik. Tnx, Walter
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#7
June 4th 2009, 09:32
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I would have thought that the stainless exhaust fabricators would have 60mm in stock? I was talking to a fabricator in Nottingham about my 500E that has a 65mm pipe in the mid section and there were no supply problems with that size. I have in the past has stainless exhaust pipes delivered mail order - is that an option?
Clive
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#8
June 7th 2009, 15:36
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Yes, it woud certainly be an option, but I 'tested' the drain pipe today on a track day and went pretty much all out and it never melted or collapsed or anything. Oil never even got hotter than 90 degrees Celcius!
Engine ran very well and it was a blast. Clip is form driving onto the track with the other participants: http://www.youtube.com/watch?v=MaQOS...e=channel_page       Sorry for the overload of pics of my car...
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