Turbo charging an M104 electronic fuel injection is much easier than CIS M103 turbocharging.

you would be surpised how much more power the M104 is alone.

I think you could be in the 14 flat if you could hook up. You will want to stiffen your subframe. (My brother and I have done that already.)

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.