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Old 01-24-2012, 12:50 PM   #15
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I agree wholeheartedly Dakota!
My issue is, and here is the rub..
The cost of what you suggest is high... if I was gonna go the all that trouble I would stuff a Diesel in it, say a 6BT from a 98 Dodge truck, get the referee to approve the conversion, get better Torque, better mileage, and never have to smog it again!
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Old 01-24-2012, 05:27 PM   #16
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I agree wholeheartedly Dakota!
My issue is, and here is the rub..
The cost of what you suggest is high... if I was gonna go the all that trouble I would stuff a Diesel in it, say a 6BT from a 98 Dodge truck, get the referee to approve the conversion, get better Torque, better mileage, and never have to smog it again!
I'd look for something with a 7.4 Vortec. 96 or so. I think it would move that Argosy along quite smartly. It would be efficient, quiet, smooth, and run clean.

As much as I like the 6BT, I think it would be pretty noisy sitting up front.

I've bought wrecked donor vehicles with low milage drivetrains for much less than some of these EFI aftermarket kits. I paid $500 for that 2000 Explorer with 65,000 miles it. Very clean and runs like a new engine.
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Old 01-24-2012, 07:17 PM   #17
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Yes, thats a good play to... just dont use the Exploder tires or suspension!
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Old 01-24-2012, 08:30 PM   #18
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Yes, thats a good play to... just dont use the Exploder tires or suspension!
Just the engine and the 4R70W.
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Old 01-24-2012, 09:05 PM   #19
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somewhere on this forum a member stuffed a cummins diesel into a moho with great results. He did a real sweet job of describing the whole process. bought him a dodge pick up for cheap and off he went.
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Old 01-25-2012, 01:40 PM   #20
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Don't know if I did the right thing with changing to EFI, but in the 7 years and over 45,000 miles I've driven 'Silver Bullet' with the EFI I've saved in the neighborhood of 4100 gallons of gas. Was able to burn regular instead of premium. That's somewhere in the area of $8-$12,000 back on a $1700 investment and less than 2 weeks to install it. The extra torque did take out the frontend of the Allison 545 transmission eventually.
As far as changing the engine/transmission: Wish I'd come across the 8.1/T-1000 before I'd already bought the 4L80e. Then after the 4L80e toasted in less then 500 miles, wish I'd used it as a boat anchor and started over with the 8.1/T-1000. With all the setback I had making the 4L80e work I think I'll be glad I did it too. Besides, had to put an electronic speed-o-meter in, so now I have a 1986 motor home with 500 miles on her. How cool is that!
It's time to think about replacing the cam set next. You know they don't last forever. Maybe a hyd roller cam? More lift, more duration, more power, less heat.
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Old 01-27-2012, 10:36 PM   #21
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Mel,
What efi setup did you use? If you were going to do it again, would you use the same one?
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Old 01-29-2012, 07:18 PM   #22
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Mel,
What efi setup did you use? If you were going to do it again, would you use the same one?
I got mine from Turbo City which, the last I checked, don't do gas engines anymore. They're other places that offer a custom wire harness with an all GM parts setup. I just feel more comfortable with the fact that I can get all the parts at the parts store. I've heard some war stories about the Holley system on tow trucks, but then they may have the knots work out of it by now.
I'll glad I installed it, like I said, It's payed for itself many times in cost, power and reliability.
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Old 01-30-2012, 09:42 AM   #23
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Painless Wiring has a harness that uses the stock TBI EFI components to retrofit to an older carbed engine. Here's a link to their site:

Painless Performance: GM 1982 - 1993 Throttle Body Fuel Injection Harness
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Old 01-30-2012, 06:34 PM   #24
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somewhere on this forum a member stuffed a cummins diesel into a moho with great results. He did a real sweet job of describing the whole process. bought him a dodge pick up for cheap and off he went.
You mean this one doorgunner?

http://www.airforums.com/forums/f311...cle-38432.html
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Old 02-01-2012, 10:31 AM   #25
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In my opinion, throttle body injection systems (TBI) are little more than a replacement of a carburetor. I've never seen significant gains over a properly tuned carb. Many install then to solve carb problems an are quite happy. If you are going through the expense and effort, I recommend (as I stated above) swapping over to a newer port injection system. There are very good reasons that TBI systems were used for a very short transitional period between carbs and port injected sequencial electronic fuel injection systems. (SEFI)

If I had a good strong 454 I would look for newer engine as a donor for heads, cam, intake, PCM, and ase an after market harness. Or do an entire engine swap.


I didn't sleep at a Holiday Inn Express last night, but I have done several EFI upgrades on 4X4s and classic cars.


Again, just my recommendation and I don't mean to be arguementative.
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