325e 85" performance, is it a myth? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 06-15-2004, 06:50 AM
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  • Motor conversion
I have a 1987 325i (2.5L) convertible and want to build an engine with performance parts, I also posess a 1985 325e (2.7L) engine. I was told by the BMW dealer these have the same block and head but the externals have differences. The has ore torque and less RPM. Can anyone tell me if this older 325e block and head can be used as a replacement engine or will modifications be needed? If this is possible do you think this is a decent choice since it is a 2.7L engine? I am wondering if the external parts on my 325i will bolt on and what I need to considder with internals like cam shaft, RPM range, porting... things things pertaining to performance.
Thanks for any information anyone might might have about this.
Sincerely,
Brooks. <brooksshepherd@hotmail.com>
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#2 (permalink) Old 06-15-2004, 10:07 AM
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You can use the 325i cylinder head and fuel management stuff to make a 2.8-liter stroker. The crank or some other bottom-end components are interchangable too, but I'm not sure what they are.


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#3 (permalink) Old 06-15-2004, 01:26 PM
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you can use the 'i' head on the 'e' block, and with custom pistons you will have a high revving, higher hp 2.7L M20. all the other externals should be 'i' components such as the intake manifold and exhaust. the performance gains wont be too great, but it will give you much better low end tq
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