how much horsepower what I have?

[pogiebait]

I drive a 1988 bmw 325 I convertible. I'm in the process of doing several add on modifications to it. when I'm finished with it I'll have 2 1/2" half inch straight pipe exhaust back to a flowmaster eliminating the cat. m 50 intakemanifold. a chip. cold air return with heat shield. headers and e 3 plugs. My m 20 engine comes with 169 horsepower stock. with all this work completed does anyone have any idea how many horse power I'll be pushing
? plus if you have any more ideas or suggestions I would appreciate it

[Lord Vader]

Well I doubt the M50 manifold will do anything because It won't fit on an M20. You'll be lucky to hit 200. Every car is different so unless you dunk it nobody will be able to tell you exact numbers.

[pogiebait]

I've been looking on ebay at m 50 manifold that supposedly fit the m20. can you explain to me what I'm missing here as you can tell I'm new to the bmw world.

[Lord Vader]

A 1988 is an E30 chassis. The M50 engine was used in the E36 chassis from 1992 to 1995. The M50 was an OBD-1 car and thus had less emission regulations. The successor to the M50 was the M52. It is an OBD-2 engine and has more emission control. As such the intake manifold in the M52 is more restricted. If you have a 1996-1998 E36 it is common to swap out the intake manifold for the M50 one. It aloes 40% more airflow over the M52. Allowing for increased HP.

The M20 is a completley different motor and as such anything from an M50 will not bolt on to it.

[pogiebait]

Thanks for the education. is there anything I can do to increase my intake with out forced induction?

[Lord Vader]

Your Welcome. As for increasing air intake theīs not too much you can do. A CAI will allow the air to flow more freely and be coolder, but you can't force more air in. A big bore throttle body helps, but they can be fairly expensive.