Diesel swap

This is the place to discuss DIESEL engine modifications.
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bthood
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Joined: Wed Jul 08, 2020 3:18 am
Location: Bay Minette , Alabama
Isuzu vehicle(s): 1982 Isuzu I-mark engine 1.8 liter diesel, 1987 PUP

Diesel swap

Post by bthood »

What gearing does a stock pup use in the rear? I am doing a swap with a power train from a pup body that has rusted too far to save. When I do this swap, should I use the factory Isuzu rear (I still have the whole truck)? If I were to put a C223 and it’s 5 speed factory trans into a vehicle that is 600 lbs heavier, will there be a significant drop in power? Frankly, I’ve got a 87 pup with a gray running C233 in it and it seem to have plenty of power to adequately and safely move it along the roads of south Alabama. I’m very conflicted about turbo. I honestly think that if I were to use an aftermarket unit and keep the boost between 5 to 8 psi, it would probably perform ok. However, I thought that I’d try it without boost first. Im not looking for super power nor do I want to act like a teenager again. I simply want to use what I have. Any thoughts on using a factory rear? What size tires would y’all recommend for this swap. It’s going into a Ford Ranger 4dr body. I’m not want to tow or haul anything other than my young children in this vehicle. Thanks!
Brian
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JoeIsuzu
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Isuzu vehicle(s): Original owner, '83 LS Diesel, 5-spd, 2wd, Long Bed, restoration in progress!

Re: Diesel swap

Post by JoeIsuzu »

bthood wrote:
Wed Jun 09, 2021 9:23 am
What gearing does a stock pup use in the rear?
Diesel 2wd 5-speed: 3.73
Gas 2wd 5-speed: 4.10
All 2wd 4-speed: 3.41
All 4wd: 4.10
All automatics: 4.10

Jack
bthood
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Posts: 202
Joined: Wed Jul 08, 2020 3:18 am
Location: Bay Minette , Alabama
Isuzu vehicle(s): 1982 Isuzu I-mark engine 1.8 liter diesel, 1987 PUP

Re: Diesel swap

Post by bthood »

Is a 3:73 the best choice with additional weight?
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JoeIsuzu
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Location: Germantown (next to Elvistown), TN
Isuzu vehicle(s): Original owner, '83 LS Diesel, 5-spd, 2wd, Long Bed, restoration in progress!

Re: Diesel swap

Post by JoeIsuzu »

bthood wrote:
Wed Jun 09, 2021 12:45 pm
Is a 3:73 the best choice with additional weight?
Seems the best option to me, but are you wanting to use the P'up driveline? I'd definitely use the original Ranger rear axle, or perhaps find a Ranger ring and pinion that is close to 3.73. What ratio is in it?

Jack
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puttputtinpup
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Location: Winston Salem, NC

Re: Diesel swap

Post by puttputtinpup »

bthood wrote:
Wed Jun 09, 2021 12:45 pm
Is a 3:73 the best choice with additional weight?
I'd say use a 4.10 rear end if you have a heavier vehicle or hauling more weight. My 1st pup had a 5speed 2wd diesel and I could barely pull my 14' Jon boat out of the lake boat ranp on a trailer.
FiatSpider2
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Re: Diesel swap

Post by FiatSpider2 »

To keep the Ranger balanced and riding factory use the original rim and tire sizes specified for the vehicle.

What year is the Ranger and what engine/transmission are coming out?
FiatSpider2 (4FB1 Isuzu Turbo Diesel powered 1978 Fiat Spider)
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