I and E conversions for 325?

[spoon8721]

Just curious has anyone out there, or know anyone out there that has successfully taking the head off of a 325i and placed it on the block of the older E motor? I currently have access to both motors for the e30 and am getting ready to attempt this conversion, I am just curious if anyone has experienced any difficulties with this or if it is just a bolt up procedure?
Thanks for any input!

[silversled]

I don't think you can do that....I think that it wouldn't work.....

[Jedz123]

Depends on what year 325i, If it's a E30 325i then yes the heads will bolt up on the eta 2.7 M20 engine. However your going to drop the compression ratio on your eta M20 because the i M20 2.5 had different taller pistons then the eta M20 2.7. If you plan on boosting it's a good idea if not your going to lose power from doing the swap. You can however swap the camshafts and valve spring over to the 2.7 eta M20 from the i 2.5 M20 and gain some significant top end power. The i 2.5 M20 has a more aggressive cam grind and stronger valve springs then the eta 2.7 M20. If you want the most bang for your buck I would run the Eta 2.7 M20 motor with the I 2.5 cam and valve springs with a Dinan performance chip or the 325i ecu.

This swap is in the cards for me in the spring, I've already installed the Dinan chip and seen a considerable increase in power.