lookin for upgrades for my 6.2 "84" 1 ton cucv

[jesseoutlawjames]

I just bought a 1984 1 1/4 ton cucv with only 60,000 miles on it. It has the 6.2 diesel and runs awsome until i try and tow something up a slight grade then it slows down to turtel speed.is there anything i can do besides a expensive sidewinder upgrade.like nslaaling new injectors our something else.

 

[ken]

You can drill holes in the air clearer can. It's starving for air. It will make a noticable difference. But not much. It also makes that engine roar much louder. You can also install a 2 1/2 inch dual exaust. That made another noticable difference on my 1028. And last but not least you can turn up the fuel rate about 1/8 turn that will wake it up eve nmore. But don't go much more than that with out a turbo.

 

[m35tech]

ok , not to be funny but , your talking about a 6.2 non turbo, there are not too many upgrades to this engine, this is why the mil went with the 6.5 diesel engine.... you may want to check out one of the diesel forums....

 

[FMJ]

Banks Turbo. . .

 

[jesseoutlawjames]

the truck has a k-n filter that is in the air filter housing and also has a 2 and half inch dual exhaust already.I am not sure if I should mess with the fuel ratio. the banks kit so far what I have seen costs way more than I could afford.I am installing some 255-85-r16 bfg mud terrains with the 456 gear ratio those should help would new injectors make a difference?
The truck got 10 mpg the last two tank fulls I was hopin for better not sure if something is wrong

 

[motormayhem]

My m1009 gets about 18 but it has 308's in the rear and 35's. But I thought the m1008 got better than 10, but I could be wrong. Maybe your fuel filter needs changing?

 

[jesseoutlawjames]

I changed the fuel filter and air filter before the two tanks of fuel that I used and it got 10.1 mpg and 10.3 mpg Not sure if it's because the truck is a m1028 with the j-6.2 diesel or what

thanks for the input

 

[Rustmaster]

I believe that all CUCVs have the J-code. I think 10 mpg is OK, I believe that is what i get.

 

[m4A1]

My 1028 used to get about 14 and that is mostly in town. Never took it for a long highway drive to know what it would get on the highway.

 

[Westech]

you can get new High performance injectors (the internal parts, springs, spray head ect.. ) for around 80 bucks for the set. All you have to do is take the injector apart and slap the new guts in. Its really ez!

 

[allrevup]

The teerain and your driving style can affect your mileage. I live in the flat Mid- Atlantic region With the original LT235/85/R 16 at 65psi, I average 15-17 MPG convined city/hwy. On a trip to N.Y. and back 300+ miles at 50-55 mph, I average 19 MPG. With the 36/12.50/16.5 Humvee tires wheels and 2" spacer I am lucky to average 11-13 MPG, Off-Road Mileage is all over the place with diflated 36" tires with 7-8 MPG as an average. Speed and distances are GPS comfirm and adjusted for the taller 36" tires I regularly used the Power_____? additive from Wally-World , Lucas or cheap 2 stroke oil. Other then a turbo instalation (to me, not cost effective) good engine maintenace, addresing the air intake, exhaust and FI adjustment is all you can do.

 

[tsmall07]

the truck has a k-n filter that is in the air filter housing and also has a 2 and half inch dual exhaust already.I am not sure if I should mess with the fuel ratio. the banks kit so far what I have seen costs way more than I could afford.I am installing some 255-85-r16 bfg mud terrains with the 456 gear ratio those should help would new injectors make a difference?
The truck got 10 mpg the last two tank fulls I was hopin for better not sure if something is wrong

Sounds like you're pretty set on new injectors and you don't want to listen to other suggestions. You should get the new injectors and report back on how it works.

 

[Recovry4x4]

Also consider that the 255 tire will decrease your RPM for a certain speed, it will also rob you of a fraction of pulling power, your chief complaint. About the best you can do without a turbo is what the folks already said, open up the air cleaner, free flow exhaust and bump up the fuel rate. FWIW adding a second snorkel to the air cleaner helps and looks almost stock. A balance tube between the duals will help as well.

 

[RockyM1028]

You can drill holes in the air clearer can. It's starving for air. It will make a noticable difference. But not much. It also makes that engine roar much louder. You can also install a 2 1/2 inch dual exaust. That made another noticable difference on my 1028. And last but not least you can turn up the fuel rate about 1/8 turn that will wake it up eve nmore. But don't go much more than that with out a turbo.

How and were can I turn up the fuel ratio? 1/8 turn clockwise????

 

[Westech]

Turn Up the Fuel on a 6.2 - 6.5 GM Diesel Mechanical Injection Pump

 

[kennyw]

How and were can I turn up the fuel ratio? 1/8 turn clockwise????

Turning up the fuel can be risky if you don't monitor the temps as you can melt down your pistons. Make sure you understand the risks and how to minimize problems before making that kind of mod. A pyro meter is good for watching exhaust temps if you start turning up the fuel.

 

[kentuckycucv]

I think somebody might have already turned up your IP... maybe too much....Maybe your fuel air mix is off... Just a thought.

 

[allrevup]

GOOD POINT! Kentuckycucv. Mine was turned up by the Navy guys...

 

[jesseoutlawjames]

What kind of new injectors are good ones and where to order
thanks a bunch

 

[Westech]

Chevy GMC 6.2,6.5 6.5L TURBO Diesel Injector Nozzles:eBay Motors (item 150345432983 end time Jun-12-09 14:51:24 PDT)