diesel crank
Moderator: martauto
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nikos
- E30 Zone Newbie
- Posts: 145
- Joined: Mon Jan 24, 2005 11:00 pm
- Location: greece
anyone knows if the diesel crank needs balancing and lighting and how much for the 2.7 conversion? and what is the speed limit that can spin?
1991 325 cabio t/c 3.2 evo, 6speed, e36m3 rack, adj bilstein,
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chu346
- E30 Zone Addict
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- Joined: Mon Jan 10, 2005 11:00 pm
- Location: Leicester
It shouldn't need balencing but it always helps.
Speed limit should be whatever you want because the rockers will break first anyway.
Cost can vary between 250-3500 pounds or more depending on how you want to build it and how much work you can do yourself.
Speed limit should be whatever you want because the rockers will break first anyway.
Cost can vary between 250-3500 pounds or more depending on how you want to build it and how much work you can do yourself.
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Ant
- Retired Team Member
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- Joined: Tue Dec 21, 2004 11:00 pm
- Location: PD+E dept :D
its a V heavy item, and some lighteneing is a good idea, you'll never break it dude so no worries there 
requires specific bearing shells too , std wont last that long, the crank is hard as steel ( literally
)
requires specific bearing shells too , std wont last that long, the crank is hard as steel ( literally
)Product Development and Endurance for Delphi.
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Email FTW
Original performance chips, original works not unlicensed copies
Email FTW-
Turbo-Brown
- Boost Junkie
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- Joined: Tue Feb 15, 2005 11:00 pm
- Location: Aldershot, Hants
Hmmm. The bearings shouldn't wear except when the oil pressure's low i.e. when cranking, and even then it's the surface finish of the journals and not the material that'll determine whether the bearings die quickly or not.
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Ant
- Retired Team Member
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totally agree Alex, but the TD crank has specific bearings on the ETK, material must be different as a result, the dims are identical, and the petrol M20 bearings share common dims too.
I have used the correct ones as specced on a customers engine very recently, seemed only right to use the OE parts .
I have some M21 big end shells in the unit, again the same but not, you're welcome to a couple for comparison m8, be nice to see why/what is the difference.
I have used the correct ones as specced on a customers engine very recently, seemed only right to use the OE parts .
I have some M21 big end shells in the unit, again the same but not, you're welcome to a couple for comparison m8, be nice to see why/what is the difference.
Product Development and Endurance for Delphi.
Original performance chips, original works not unlicensed copies Email FTW
Original performance chips, original works not unlicensed copies
Email FTW-
Turbo-Brown
- Boost Junkie
- Posts: 4705
- Joined: Tue Feb 15, 2005 11:00 pm
- Location: Aldershot, Hants
Would guess that the ones for use in the diesel are the copper based ones which will take more of a pounding at startup as you'd get in the diesel application, whereas the aluminium based ones I'd imagine would be fine for petrol usage 
Problem with the copper ones is the imbedability isn't as good so if something hard finds its way into the oil system, it sticks out of the bearing and scores the crank rather than sinking into the bearing material and leaving the crank alone.
As you say though dude, if BMW specced it, it should be fine
Problem with the copper ones is the imbedability isn't as good so if something hard finds its way into the oil system, it sticks out of the bearing and scores the crank rather than sinking into the bearing material and leaving the crank alone.
As you say though dude, if BMW specced it, it should be fine