Need Some Help!!!

[Furious]

all in all i was very confused because you started out by saying "Boost should be the last thing on your mind. You can build up an m50 to 500+ HP" ..you basically started off by saying that its possible to go NA and get 500 hp, than used someone who is on boost as an example.

[NOTORIOUS VR]

Originally Posted by thinair

As a note, the 328 engine (M52B28) has a forged crank, stock. The hardest part so I've heard is keeping the head sealed to the block (blowing gaskets, head distortion, etc)

A lot of engines have forged cranks (i know the M50 doesn't), but that's not the problem... the problem lie's more with the stock cast pistons... they SUCK (for boost) on any car.

Especially with a higher compression ratio, you need to bring it down to at least 8.5:1 and be somewhat conservative on the timing if you want to make a stock motor last with boost.

[Mr. M-Tech]

Originally Posted by propr'one

Boost should be the last thing on your mind. You can build up an m50 to 500+ HP, but its just cheaper to swap a 4.0 in and mod/boost that, same results with better reliability and less money spent

Why even talk about an M50 when a 90 525i came with an M20 motor.