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H1 Hummer Cummins Swapped

Sand

Active Member
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240
Location
Canada
And I've ordered a pair of the Dorman Taurus a/c fans you mentioned. My Hydralic fan drive will come later (if needed) it's too much engineering off the mark. I should get a running truck and mess with it later. The 6.5 was such a hot runner I'm overly sensitive about cooling. My Cummins guys assure me it wont be a big issue. I'll wait till I'm pulling 10 000lbs uphill to decide.
 

Will L.

Well-Known Member
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Boulder City Nv
I would say while the stack is out, if the radiator is in question rebuild like Eric did his with the larger dimple core style or replace with new wether factory or Davis aluminum. At 20 years old, It isn’t like its a bad idea anyways.

There was an upgrade condensor made that had better airflow and improved exchange rate, I don’t remember what year that upgrade was made. Either of the “Daves” would. The existing one is ok to run, not like a radiator that if fails from metal fatigue can destroy the new engine.

Charge air cooler? It isn’t like there is any examples of a hummer with one it hurt.

The oil and power steering both are fine unless you have a specific problem from damage. Unless you are going to go aluminum, then seriously consider the all aluminum package. Only draw back is the expense of it.

The last and certainly not least part is talk to Chris about coating all of it. Any new parts you have shipped to him first then from him to you. The use of the coatings on the stack is such an obvious one to me that it has never been a question of if I would do mine. Just affording to do it, kinda like the balanced flow waterpump on the 6.5 - not if but when.

While it is all out and new engine makes sense as to when.
Just need to question Chris about timing with the hurricane and all. I hope everyone in the Carolinas is holding in ok-

If the budget is tight , I get not doing it all new now for sure. And yes the cummins will run a more even temperature. But redoing at least the radiator would be at the top of my list.
 

Will L.

Well-Known Member
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Location
Boulder City Nv
And I meant to ask: Eric W. was going to sell a diy cummins conversion kit. Is this what you are doing? Not sure he ever did put it together.

Also, if you are doing the electric only fans- DEFINITELY coat the entire cooling stack.
 

Sand

Active Member
Messages
208
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240
Location
Canada
Its listed on his website. I'm sure it's great but I'm all for the full DIY. It's not my first swap and I've got the backing of some excellent local help and a fantastic Diesel community here on the Truckstop! I love cruising the wreckers for parts I can "repurpose" on a hummer cummins swap. Hummins is looking like the chosen name.
 
Messages
31
Likes
11
Location
Ca
Brackets fabbed up to pull the A/C pump and Alt closer to block and above the frame rail. This setup uses an 81 inch belt.

View attachment 53244
Hey man. So I am in the process of doing a 12v swap into my 96 K3500. Not as cool as a H1, but nonetheless I am very excited. One of the problems I've come upon is the A/C & Alternator mounting issues. There are companies that make conversion brackets, however, I'm not a fan of some of them. However, your bracket is exactly what I'm looking for. Do you plan on selling those brackets at all? How high did you raise it? I'm sure as you know, the problem is the A/C pump will hit the passenger frame rail in the pickups, hence why I'm liking your bracket. Plus your bracket would let me retain my 6.5 alternator which runs the tachometer & voltmeter. Bonus! Less wiring! Please let me know, I'd definitely buy one. Thanks!
 
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Location
Nature Coast
Hey man. So I am in the process of doing a 12v swap into my 96 K3500. Not as cool as a H1, but nonetheless I am very excited. One of the problems I've come upon is the A/C & Alternator mounting issues. Thanks!
I've been doing my conversion and have come to the conclusion that the 'mid-mount' FORD AC bracket is best fit for GMT400 and fabricate an upper gen/alt brackets for whatever unit you want to use.

If your Cummins already has a mid-mount turbo exhaust manifold then a 1st gen Ram Cummins 2wd 4" turbo downpipe is best fit on the 4wd GMT400.
 
Messages
31
Likes
11
Location
Ca
Do you have a link or picture of the Ford mid mount a/c? Not sure if I said it earlier, I unfortunately don't know how to weld. I can drill & make stuff with bolts & screws though. Doesn't look as nice & not as compact, but we'll see. I'll look for the Ford ac mount.
 
Messages
31
Likes
11
Location
Ca
Oh so you're suggesting mock something up & have a welder actually make it? That would work. I've been looking around. Theres a website called screaminseemanoffroad.com that sells a high mount ac/alt bracket. But it's pretty expensive. And that bracket doesn't allow me to use my alternator. It seems pretty simple to make. Flat plate, compressor bolts to the side (pad style) then the alternator bolts up top. I could make something out of wood to be precise. I like that idea. Thanks!
 
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1,586
Location
Nature Coast
Do you have a link or picture of the Ford mid mount a/c? Not sure if I said it earlier, I unfortunately don't know how to weld. I can drill & make stuff with bolts & screws though. Doesn't look as nice & not as compact, but we'll see. I'll look for the Ford ac mount.
All that is needed for the upper gen/alt bracket is some 3/8" flat stock shaped to curve around top of gen/alt to mount from the thermostat housing to upper gen/alt bolt nothing complex about it.

What gen Cummins do you have?

Search in your browser for Ford Cummins mid-mount AC compressor bracket aside the bracket you will need two o rings 1 for the bracket to block and 1 for the lower water neck & water neck must be the straight out design nothing else will work.

I'll post links later.
 
Messages
31
Likes
11
Location
Ca
Are you talking about a bracket like this? Before you look at the pic, please note: this is not my truck. This is a chummins swap I was looking at buying a long time ago. Notice the mount plate for the alternator. Also note the ungodly amount of bigger nuts & washers used as spacers. But this plate is what you're referring to?
302.jpeg
 
Messages
2,462
Likes
1,586
Location
Nature Coast
Are you talking about a bracket like this? Before you look at the pic, please note: this is not my truck. This is a chummins swap I was looking at buying a long time ago. Notice the mount plate for the alternator. Also note the ungodly amount of bigger nuts & washers used as spacers. But this plate is what you're referring to?
View attachment 54020
 

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