Garrett Fulton
Newbie
My '93 C2500 is a 6.5, last year of mech. injection. That's the major reason it's been so reliable. 2nd engine and the first one wasn't worn out at about 200 k miles. Got a good deal on a year 2000 mil. surplus AMG made new engine. With the piston oil squirters and the later and stronger block. Put a bigger turbo on it, (A-team) and the dual thermostat/later cooling upgrades. Turned up the DB2 pump and put an intercooler on it with a dual compressor outlet temp./eng. inlet temp indicator. The intercooler made all the difference and drops the eng. inlet temp. between 90-130 degrees at full boost of 13 psi which is all I'm going to feed it. From all the accounts I've read over the years, the 6.5 does_not_hold up at all with boost over 15 psi. Better mileage with the I/C and noticeably more power, lower eng. temps. I've got about 70 k on it now and no bad problems. You couldn't give me a 6.5 with the electronic injection though. And be sure to add the diesel fuel additive. The Stanadyne inj. pumps don't like the ultra low sulfur fuel. Just my .02.