Author Topic: Twin Turbo M42 (Read 13373 times)

chapellej · « **on:** December 21, 2009, 02:41:26 PM »

has anyone seen or heard of anybody successfully twining the m42 engine? i am intersted in doing this as i would like to max the power i can from this as i already have the makings for a single turbo setup. any info would be great.

1991 E30 M42 · « **Reply #1 on:** December 21, 2009, 04:10:55 PM »

A twin turbo setup on such a small displacement engine is a waste of time and money. the engine does not have cfm of exhaust so spool up two turbos unless they are the size of our oil filter. Stick with your single turbo setup, or twin charge (supercharger and turbocharger) it if you are really looking for a challenge.

chapellej · « **Reply #2 on:** December 22, 2009, 10:33:56 AM »

Thank you for the input, i like that set up better however the cost of a supercharger versus twin turbo are higher but i will explore the idea more.

dwtaylorpdx · « **Reply #3 on:** December 22, 2009, 11:56:36 AM »

So there are some pretty solid limits as to what the M42/M44 engine can handle, Based on the crank and block as the building blocks(Ignoring the transmission and rear end and chassis for now.). These limits are pretty easy to reach with a single turbo, multi is just going to take more room add weight and not really add any usable power, the turbo+mechanical blower is (IMHO) being done for cool factor more than need by VW. They occasionally zip off into the weeds getting caught up in the "Lookie what we can do" mind set... (Corrado, good car overall but a maintenance pig) Unless its like the Mazda Millenia engine with the blower because its really a Miller cycle engine?

Cheers.

Dave