Group Buy : Mahle Motorsport - Pistons
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Been given a delivery date.
Pistons will ship to us Tuesday September 29th 2015. Will take 3-4 days to arrive to us and then we will ship them to everyone else.Comment
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Update
as promised Pistons shipped to us but not on Tuesday but rather yesterday (Wednesday).
Mahle made an extra 16 pieces of the 82mm bore pistons and unfortunately as the rules , we had to take them.
We have 3 sets of 82mm units that are available to anyone.
86.4mm Stroke List:- Rallyequattro – 1 set x 82mm bore - PAID
- AppAtt@ck - 1 set x 82mm bore - PAID
- V6quattro - 1 set x 82mm bore - PAID
- MuK1989 - 1 set x 82mm bore - PAID
- Jukkis - 1 set x 82mm bore - PAID
- Wizard-of-OD – 1 set x 83.0mm bore - PAID
- FORREST – 1 set x 83.0mm bore - PAID
- Lars Bjornstad – 1 set x 83mm bore - PAID
- UNCLAIMED - 1 set x 82.0mm bore
- UNCLAIMED - 1 set x 82.0mm bore
- UNCLAIMED - 1 set x 82.0mm bore
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It was decided to go with a -8cc dish.
This assumes an 8.49cc volume for the head gasket and a 44cc volume for the cylinder head.An Elring AAN 20V Turbo head gasket has a max bore of 82.2mm and a thickness when fully compressed of 1.6mm = 8.49cc
Vc = 8cc + 44cc + 8.49cc = 60.49
86.4mm STROKE:
81.0mm bore x 86.4mm stroke = 2226.1cc : Vh = 445.20 cc / cylinder
82.0mm bore x 86.4mm stroke = 2281.4cc : Vh = 456.28 cc / cylinder
83.0mm bore x 86.4mm stroke = 2337.4cc : Vh = 467.44 cc / cylinder
Compression Ratio is as follows:
E (compression ratio) = (Vh + Vc) / Vc
82.0mm Bore:
= 456.28 + 60.49 / 60.49
= 8.54 : 1 CR
83.0mm Bore:
= 467.44 + 60.49 / 60.49
= 8.72 : 1 CR
Price remains the same @ $850 USD + whatever the shipping.
As of right now we are down to (2) of the 82mm sets being available. If I have to sacrifice my own 83mm so that someone can have it then I will do that.Comment
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Update86.4mm Stroke List:- Rallyequattro – 1 set x 82mm bore - PAID
- V6quattro - 1 set x 82mm bore - PAID
- MuK1989 - 1 set x 82mm bore - PAID
- Jukkis - 1 set x 82mm bore - PAID
- FORREST – 1 set x 83.0mm bore - PAID
- Lars Bjornstad – 1 set x 83mm bore - PAID
- AppAtt@ck - 1 set x 82mm bore - PAID
- Wizard-of-OD – 1 set x 83.0mm bore - PAID
- UNCLAIMED - 1 set x 82.0mm bore
- UNCLAIMED - 1 set x 82.0mm bore
- UNCLAIMED - 1 set x 82.0mm bore
All the RED above has been shipped.

Now have (3) Sets of 82mm available.Comment
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0-200km/h 9sec
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