by c12h26 » Sat Nov 24, 2007 11:44 am
Since it is not going to be a daily driver you should put a water-to-air intercooler like i put on my D250.when the truck was not i/c the charge air temp was 589* and after the i/c the charge air temp is 120* on a run.I went from a 15.03@88mph to 14.49@90mph 27psi.You can also advance the timing,I bumped my timing a little more then an 1/8 in and went from a 14.49@90mph to 13.95@95mph. I still have the stock turbo,injectors and trans.so with some nitrous and slicks,my truck could be in the 12s.
1991 D250 reg. cab 518
4" turbo back,pump turned up,bumped timing,intercooler,HX52,366 spring,ground AFC lever,piston lift pump,Goerend converter,M/T ET street radials,nitrous,lowered.