Re: AMC Jeep 2.5 FI in Spirit?

[farna@xxxxxxx]

Make sure you get a direct port injection model (injector for each cylinder), which would be 91 and later. Second best is the TBI model, 87-90. Pre 87 models use a carb and you really don't want one of those. Power ratings are:
         HP       Torque
MPI   123@5250   139@3250
TBI   117@5000   135@3500
Carb  105@5000   132@2800

Not much difference in torque, but sure is in HP! Don't worry much about the extra wiring for the TBI/MPI -- it isn't hard as long as you lift the entire Jeep wiring harness. You will need low gears -- 4.10 with the five speed would be about right. With 3.73 you might be okay, but would be shifting a lot between 4th and 5th. Eagles with four cylinders and XJ/YJ Jeeps came with 4.10 gears with autos and five speeds. The axles are a bit wide for a Spirit (about 2" wider), but can be used with deep offset wheels. Jeep wheels will work, just use a spacer between the front spindles and steering knuckle to push them out the same as the back. 


On September 26, 2005 Jim B wrote:

> A: I would do it, but make sure you have a decently low gear ratio. With
> 4.10s it would run quite nicely. My '86 Comanche with nearly 300,000 miles
> on it still runs like a top (but has some blowby issues now) I ran 4.10s
> with 30" tires and it was still pretty zippy. We had 6,000lbs gross weight
> when we went to Ouray, CO (myself, 2 grown sons, 5 gallon bottle of water, 3
> spare tires and the truck with the rest of the weight being spare parts I
> dragged out in case I broke anything 4 wheeling and swap meet stuff)
> 
> 
> From: Jesse <j2sax@xxxxxxxxx>
> Subject: AMC Jeep 2.5  FI in Spirit?
> To: mail@xxxxxxxxxxxx
> 
> So, another crazy combination has popped to mind since
> the gas bounced the $3's.
> 
> I have an 80 AMX that is currently dormant.  I just
> stumbled across a wrecked 2WD Chero with 2.5 and 5 spd
> (AMC not iron puke).  OUtside of a Renault, I am hard
> pressed to think of a better potential all AMC mileage
> combo.  I know it won't be a rocket ship, however,
> there are all kinds of aftermarket perf setups for the
> 2.5 because of Jeeps.
> 
> Any ideas?
> 
> Thanks,
> 
> 
> Jesse


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