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Alpina B7 Turbo pistons on EBay
Posted: Nov 30, 2006 5:00 AM
by RobertRO
I have no affiliation with this bid.
I just found it on EBay and I thought that some of you turbo guys may find it interesting.
BMW ALPINA B7 Turbo Kolben e28 e24 Turbokolben 6Stk.
Posted: Nov 30, 2006 8:47 AM
by Duke
I am sure they are much heavier than the JE pistons TCD sells.
Posted: Nov 30, 2006 8:50 AM
by RobertRO
I wonder, what is the purpose of the offset "ditch" on piston top?
Posted: Nov 30, 2006 10:30 AM
by russc
RobertRO wrote:I wonder, what is the purpose of the offset "ditch" on piston top?
Valve clearance.
Im not sure there is anything special about those pistons.
RussC
Posted: Nov 30, 2006 10:45 AM
by Shawn D.
RobertRO wrote:I wonder, what is the purpose of the offset "ditch" on piston top?
It looks as if they're trying to maintain some of the "quench" area on one side of the chamber. I doubt it's for valve clearance, as almost the whole piston is done that way (the small "ditch" is actually the raised portion).
Posted: Nov 30, 2006 12:37 PM
by atle28e
Duke M535ti wrote:I am sure they are much heavier than the JE pistons TCD sells.
Ofcourse its duke with his anti-tcd comments. Tcd you must get tired of everything performance related being compared to you
Posted: Nov 30, 2006 12:49 PM
by Shawn D.
atle28e wrote:Duke M535ti wrote:I am sure they are much heavier than the JE pistons TCD sells.
Ofcourse its duke with his anti-tcd comments. Tcd you must get tired of everything performance related being compared to you
Uhh... that was a pro-TCD comment by Duke.
It's Dinan that Duke rails against, not TCD.
Re: Alpina B7 Turbo pistons on EBay
Posted: Nov 30, 2006 12:56 PM
by M635CSi
No doubt the pistons Alpina sourced back then were pretty good. By today's standards, there are much lighter and stronger pistons available which also allow lower friction rings.