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trooper Tdiesel · 08-26-2012, 01:41 AM

most likly engine is the 3.9L isuzu I-4
about the only engine used in Isuzu cab overs in the 80s early 90s

the 2.8 and 3.1L where never sold state side rigged for road use...there more of a car engine with a 4,200rpm top end when in road config.

its more or less size wise the same as a cummens 4BT engine,
same size, same 750LBs and same 2,800ish rpm limit..

its the one that's in the dodge trucks with two less pistons.

difference being the Isuzu was sold in many different flavors over the years,
DI and IDI injected with and with out turbo.

the early ones have HP numbers on par with my Isuzu SUV 80hp just its a 3.9L not a 2.2L so way more torque.

where the 4BT are all DI injected and turbo-ed as far as i know, for the ones made for road use.....

id say 30 is quite possable, but 44 hmmm.....need real lonnnnnnnnnnnnng legs as far as gearing.
problem is a 2.73-3.08 non full floating diff don't work real well for big loads......
i know more then one person that as blown light diffs up moving big loads in half tons...

08-26-2012, 01:41 AM	#3 (permalink)
trooper Tdiesel live, breath, Isuzu-Ds Join Date: Mar 2011 Location: oregon Posts: 231 puddle jumper - '93 Suzuki sidekick base model energizer bunny - '86 isuzu trooper base model Clifford the big red dog - '84 GM S-10 durango Thanks: 1 Thanked 20 Times in 17 Posts	most likly engine is the 3.9L isuzu I-4 about the only engine used in Isuzu cab overs in the 80s early 90s the 2.8 and 3.1L where never sold state side rigged for road use...there more of a car engine with a 4,200rpm top end when in road config. its more or less size wise the same as a cummens 4BT engine, same size, same 750LBs and same 2,800ish rpm limit.. its the one that's in the dodge trucks with two less pistons. difference being the Isuzu was sold in many different flavors over the years, DI and IDI injected with and with out turbo. the early ones have HP numbers on par with my Isuzu SUV 80hp just its a 3.9L not a 2.2L so way more torque. where the 4BT are all DI injected and turbo-ed as far as i know, for the ones made for road use..... id say 30 is quite possable, but 44 hmmm.....need real lonnnnnnnnnnnnng legs as far as gearing. problem is a 2.73-3.08 non full floating diff don't work real well for big loads...... i know more then one person that as blown light diffs up moving big loads in half tons... __________________ 1 86 T\D trooper with rare GEN 3 rods TRANS FIXED NOW DD 1 86 4WD 5sp pup is 2.3L gas, but plan on 2.2L diesel repower 1 91 trop, long term plan is a group buy of imported Isuzu 4JB1-T 2.8L I-4 engines, hoping to get price down to 2K not 3K plus 1993 sidekick my MPG toy, epa rating 26. i get 29/31 with stock drive train.