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|3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.|
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Originally Posted by kickarse
Yeah I figured that BMW knew what they were doing with the Manifold engineering. I was just curious.
Has anyone taken a S50/M50 manifold and modified it to fit a M20 engine? Is that even technically/physically viable?
I bet just porting for flow would be best though.
Originally Posted by gotKRAUT
No it has not been done before and i hope it never is done. It would ruin the current flow of the intake manifold. The intake manifold was engineered the way it is for a reason, its a balance of velocity and volume to get just right right flow characteristics. I have seen the factory intake manifolds/throttle bodies make over 280whp NAwhich is 140whp over stock, and well over 500whp when turbo'd...the engineers arent morons you know
now, if you really wanna get crazy and plan to make over 400hp then you need individual throttle bodies, which will MURDER your tq but increase the top end power a tad as seen above ^ the are made by DBilas and cost around $3k
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