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Re: Anyone put a big 6 into their E21? (archive)
[ Follow Ups ] [ 3-series (E21) Message Board ] [ Msg. Board FAQ ]
Posted by Mike///M on July 10, 2001 at 09:18:41:

In Reply to: Anyone put a big 6 into their E21? posted by Gil on July 08, 2001 at 08:56:52:

Just an FYI
My research on this topic indicated that the big six engine has the same bell housing as the 4 cyl. Therefore, you can use the 5 spd trans from the 320i with this conversion. I'm not sure how long the gearbox will last with twice the power output from the motor, tho. You still may have to shorten the driveshaft.
I decided against doing this conversion based on the weight issue. I'm going with a M20 baby six for my project. (which is still in the parts collection process) You may also need a 323i tachometer for the six cylinder motor, not sure. I know that I need one for the to use the M20 motor in a 320i shell.

Mike Matison
'83 320is, '96 M3 other 320's non functional

Just wondering if this is a viable option. With the right motor, intake system, and other odds and ends, it seems that high HP would be possible as compared to a baby 6. Weight a problem?

I have a 79 Euro 635CSi motor, for example with 218HP.

Just curious.

Gil
81 320is
79 320i bare shell (no rust)




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