The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: 645 Turbo swap question (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Rob Anderson on December 11, 2000 at 19:20:33:

In Reply to: Re: 645 Turbo swap question posted by Sky on December 11, 2000 at 18:05:10:

If you run low boost you shouldn't have a problem. If you want to start running higher boost, run ARP or Raceware head studs and get yourself some forged pistons. I would look into doing it personally because a low boost turbo doesn't have as much lag as a high boost low compression turbo.

Rob A
M535i SIG Technical Advisor
www.M535i.web.com


The turbo head is designed to work on a low compression block. I have a book on the earlier turbo and it was 7:1. The later motor may have been 8:1 but I really don't know. The euro block uses piston that are around 10:1. If you put the turbo head and turbine onto a 10:1 bottom end. You might have a time bomb, unless you are planning on replacing the pistons with the low compression dish pistons from an U.S spec 735.


Anyone know if 85 745i head and turbo can be installed on 85 euro 635 or does the low compression 745 involve more than just the head. Thanks! Matt LasVegas





Follow Ups:


[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.