Originally Posted by SamE30e
Your little 4 cylinder hasn't given up because it's a stock iron block BMW engine with very little power.
Trust me, I looked into it. You might make 250whp.. You could probably make that on a ghetto RRFPR ebay setup on a M50 and not even break a sweat.
Interesting... So considering the M50 and M42 make the same power per litre, it's somehow a HUGE upgrade? Oh and what's wrong with running a "stock iron block"?