friends dad trying to see what he could get out of his 01 cummins with a few mild old man mods got 35 driving 55mph on a 250 mile trip
CK5
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ultimate tow vehicle
- Thread starter buffblazer
- Start date
77crewcab
1/2 ton status
Yeah but there is a big difference in fuel economy when you are looking at 2 stroke vs. 4 stroke, the 4 stroke gets better economy. If a newer 4 stroke cummins is barely able to get that mileage then there is no way an old 2 stroke detroit will.
If it ain't a CAT it's a dog. 
For me, it would be a '91 crew cab dually K3500, black, with a 5.9L cummins to a 6 speed.
Simple, I know, but I'd love to be towing in that kind of style
Simple, I know, but I'd love to be towing in that kind of style
If there were more pics posted of that truck they weren't from me. I jumped out of the truck, ran into his field, zoomed in really far, snapped the pic, then ran back to the truck and drove off. I couldn't find the original thread either, sorry
For me, it would be a '91 crew cab dually K3500, black, with a 5.9L cummins to a 6 speed.
Simple, I know, but I'd love to be towing in that kind of style
x2
77crewcab
1/2 ton status
In simple terms the design of the 2 stroke means that it doesn't use fully the power from the expanding gasses after ignition, therefore it takes more fuel to do the same job. So it is by design less fuel efficient. The positive aspect is that if you take a 2 stroke and 4 stroke, same size of displacement, the 2 stroke will make more power. For instance since the 4bt is a popular swap, if you had a 2 stroke detroit the same displacement, the 2 stroke would make more power, but with less fuel mileage.
For me, it would be a '91 crew cab dually K3500, black, with a 5.9L cummins to a 6 speed.
Simple, I know, but I'd love to be towing in that kind of style
Agreed, although if it were a '91 it would be a V3500...technically
I posted this tow truck awhile back, I like it even though its pink or salmon or whatever color you want to call it. I bet it gets great MPG.
sixb
1/2 ton status
For me, it would be a '91 crew cab dually K3500, black, with a 5.9L cummins to a 6 speed.
Simple, I know, but I'd love to be towing in that kind of style
Excatly x2 for me, but white with a 2002 HO p-pumped 24 valve and the nv5600
My 02 dodge 1 ton quad cab 4x4 dually 6spd gets 15-16 city 14-16 pullin and 18-20 hwy unloaded. If I keep it at 65 hwy I get 20 easy and that is without any chip
there is no way I could ever get 30 mpg out of mine though
Interesting. Even though your making power on half the strokes rather than a quarter of the strokes its still less efficient.
a 2 stroke fires every time the piston goes to the top..... but, it only uses half of the down stroke to make power. it has intake holes half way down the cylinder, once it reaches the intake holes, it quits making power, and starts filling the cylinder with new air, and flushing the exhaust out.
the 4 stroke fires ever other time the piston goes to the top, but it continues to make power all the way down.
DEMON44
Low-Tech Redneck
Not disagreeing, but most of the Detroit 2 stroke diesel swaps are very small displacement with only 3 or 4 cylinders. Plus there's no emissions bs to deal with. I have a buddy that has a 3-71 in his mid 70s F350 dually and getting over 25 miles per gallon. He had it dynoed and I forgot exactly what kind of power it was putting out, but something like 250hp/450ft-lbs.
77crewcab
1/2 ton status
Right, but a 4 stroker the same size would likely get better mileage with less power. It is just the way a 2 stroke is designed.
