89 crew cab k20 4wd twin turbo cummins swap

[eric28miller]

Originally Posted by MadManAndrew

How much HP do you think that motor will be pushing? Over on the Cummins forums all those guys can talk about is finding a tranny that won't blow round about 500 horses.
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It should dyno close to 850 with timing and injection maxed out. My engine builder recommended the nv4500 with a billet input shaft. He ran one on his pulling truck for years without any problems, but the np205 transfer case i'm worried about. I'm using a rebuilt unit bored larger for extreme duty bearings, i'm told the gears like to walk up on each other. I picked up a spare if i need it. The other weak link is my 14 bolt rear, it may last a little while but definitely not forever. I talked to a local shop who can bore the tubes and housing to fit larger gears and billet shafts. I probably could've spent more time researching a stronger set-up but i'm too impatient

[MadManAndrew]

Originally Posted by eric28miller

It should dyno close to 850 with timing and injection maxed out.

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