Originally Posted by beamerboy85
I have a 1985 325e and i was gonna put the 325i head on it, im not sure exactly wat i have to do and what all i need so any suggestions would be helpful.
What you are trying to do won't work, the combustion chambers on the I head are larger to make room for the dome dished pistons (the pistons actually stick out of the block), the E engine has flat dished pistons and smaller combustion chambers. If you put an I head on an E motor you will lower the motor's compression drastically and it will not run right. This may be good combo for a turbo application but not for N/A induction. Your best bet is to get the I pistons, I head, I computer and harness, and I intake with your E block and E crank and E rods with 19lb per hr fuel injectors from a late ford 5.0 or early 4.9L V8. With this combo you'll have basically done a 2.5 I stroker motor. A rather potent combo. However, with the cost of parts and amount of work needed, it would make an M50 motor swap a lot more attractive....