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H1 Hummer Cummins Swapped

I saw the extra set of notches in the crank and my buddy who's helping with my swap suggested it was an input for the transmission. I didn't think about the tach. I even was considering adapting the 6.5 CPS to the block.

My 3000rpm governor springs are here, my Hayden fan controller is on the shelf, trans adapter is being machined.
I'm going to run the dodge alternator with an external adjustable regulator but I saw you adapt the GM one. Any reason?

My donor truck even came across an exhaust brake. I'll fit it if possible.
Love seeing pics of the swap. I study them in detail. Thanks man!
 
BTW, the rubber on the baffles is Garage door weather stripping, readily available at the local home improvement store and stands up well to the weather. The small angle is where it is attached. :)
 
Is that truck done without a lift? The valve cover at the back looks nice and tight. I think it could be done. No way to access the rear valve adjustment without raising the cab but who cares. And dual oil fillers? Stock one on the timing cover and another on the front valve cover?
 
Sand said:
I saw the extra set of notches in the crank and my buddy who's helping with my swap suggested it was an input for the transmission. I didn't think about the tach. I even was considering adapting the 6.5 CPS to the block.

My 3000rpm governor springs are here, my Hayden fan controller is on the shelf, trans adapter is being machined.
I'm going to run the dodge alternator with an external adjustable regulator but I saw you adapt the GM one. Any reason?

My donor truck even came across an exhaust brake. I'll fit it if possible.
Love seeing pics of the swap. I study them in detail. Thanks man!
Click to expand...

As far as the alternator, we just prefer them, single wire and a sense line, it's wiring is original to the H1 so it makes it simple. Swap to the smaller 8 rib pulley is all. We fab the brackets for both the Alt and the A/C pump, so alignment is not a problem.

I'm not a fan of the exhaust brakes on a hopped up Cummins. Make sure if you are going to use it that you get the stiffer valve springs. Cummins had a set they spec'ed for the commercial motors and there are of course the pricey "Behives". I've seen lot's of carnage from the "Cool sound guys", mostly bent valves and trashed turbos from constantly stalling them.
 
Sand said:
Is that truck done without a lift? The valve cover at the back looks nice and tight. I think it could be done. No way to access the rear valve adjustment without raising the cab but who cares. And dual oil fillers? Stock one on the timing cover and another on the front valve cover?
Click to expand...

It has a 2-1/2 body lift, it's not quite as tight as it looks, and yes, the body gets lifted to adjust the valves, pretty simple actually.
Ha! the duals happened because the owner took the covers home to paint them. He took the wrong set when he did, which, no biggy, just leave the one off the cover and use the Cummins blank plug which is what we are doing, except I didn't change it back before the pictures.
If you've ever changed the oil on a Cummins using just the Rocker cap, then you know why I put the Timing cover filler on. Ha!
 
Pre-oiling before you start a new motor is very important, this is our "High Tech" oiler and it works beautiful.
Doesn't get any simpler. I remover the handle and replaced it with a -4 to 1/4 npt fitting.
On the Cummins I attach it to the power steering pump oil line and pull to Turbo line.
As soon as oil is coming out the Turbo supply line, reattach and finish adding what's left in the pot, TaDa! Pre-oiled, just finish putting in the balance your motor requires.

Pre Oiler.jpg
 
If anyone is looking for a military project, we have this out back of the shop. Steve has talked about selling it.

20170831_124600.jpg
 
This one went the other way. We pulled the 6.2 diesel out and replaced it with an LSX engine. It's getting caged, long travel suspension from Rod Hall racing, King bumps stops, 4 Caribou suspension seat, Holley EFI, and paddle shifting for the 4L80e. Shooting to keep the weight under 6K.

20180727_103216.jpg34177489_10156018743974724_4336762516110573568_n.jpg35523564_10156055554274724_2109494254244986880_n.jpg36869696_10204973997946036_8446174997151481856_n.jpg36871318_10156104973149724_2364862989506445312_n.jpg
 
Next motor will be a 6.7 with a Hamilton Cams 12v head, 13mm P7100 pump, Waterman mechanical fuel pump, 3 turbo compound, and the conversion gear case that we developed. The shots of the gear case displayed by our friends at Trend/Diamond Pistons at UCC. The shot mounted in a truck was Power Driven Diesels entry at UCC, and the rest are at our shop.

29512820_10155854063774724_603200655541423858_n.jpg29541067_10155854063749724_5813880185250506925_n.jpg29595243_10155854063769724_4312287275126732919_n.jpg30697639_10155907903629724_1318936619255857152_n.jpg31906848_10155955948799724_1082325475054845952_n.jpg31945100_10155955948794724_7892317751488806912_n.jpg31956167_10155958593944724_410279778902343680_n.jpg
 
We're working out the straight cut gears, but notice it has a cam support. The harmonics pulses from the engine and mechanical pump set up will start twisting violently and snap the helical gear or camshaft when you start pushing above 1800 hp. I'm sure that below that mark you are dancing with the devil as well, it just holds on longer.
Hopefully as Trend works with the Cummins and Gear case on the Spintron we'll get more data.
 
LowRam said:
We're working out the straight cut gears, but notice it has a cam support. The harmonics pulses from the engine and mechanical pump set up will start twisting violently and snap the helical gear or camshaft when you start pushing above 1800 hp. I'm sure that below that mark you are dancing with the devil as well, it just holds on longer.
Hopefully as Trend works with the Cummins and Gear case on the Spintron we'll get more data.
Click to expand...

You work on a Spintron? You guys have access to all the toys!!
 
Someone asked me about the rollers. Yes, they are the heavy duty ones from Harbor Freight, and yes, we modified them to stand up to the heavy trucks and the wider tires by welding 1/4 x 2" straps onto them as hopefully you can see in the picture.
If we make more they will be fabbed by us and we'll use larger castors.20180727_103216 (2).jpg
 
The 6.4 Cummins we are building for Steve will have Diamonds Steel Cummins pistons for testing in a street driven hot rodded engine.
Turns out the head of the shop at Diamond worked at our shop years ago when he was first getting experience in CNC machining, funny how small the world is. :)
 
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