pickwickangler
05-21-2008, 07:29 PM
I got a prolem with my 2.5 245. New to me, fresh motor. Got the wizard pistons,std. bore, compression is 140 and ports was a little high from factory. I had the WMH carbs and on my initial run after break in it started cuttin out at around 7k, it was runnin lean. It would turn a black plug white in the 1/4 mile and pistons were dry after throttle WOT chop. I jet up and it would be real fat on the bottom and lean out quiker on the top. I went as far as 76 mains and it would barely plane out and flood out before I could achieve any rpm. I bought another new fuel pump, holley blue regulated at 5 psi and the pressure dont drop at WOT (didnt help none). I then bought a set of WH-20 carbs off here and rebuilt them, they got 46 idle jets and 96 mains and its still running lean on top. Where do I go from here? I about to pull my dang hair out!! Oh yeah, its on a allison bass boat. Any help will be gratelly appreciated!! Thanks