Since there is no need to reduce the temperature of the air going into the engine on a diesel, why bother? Most MB diesels will blow apart if you boost them to the max available from the turbo (20 psi or so) -- isn't an intercooler sorta overkill?

I don't think there is room, anyway -- the one on my sister's Volvo 740 was almost as big as the rad, anyway -- and flow isn't so much of a problem there as boost only goes to 4 psi.

Just run the boost up the 13 psi and be done with it -- that may be too much, anyway. Reducing the temp of the charge will just raise the effective compression ratio even more, and you are probably near the limit to start with. No fun driving a car with the head bolts stretched!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!