What is the difference? 1st Gen Cummins - 2nd Gen 12V

[rmrc]

I'm looking into the possibility of purchasing a 1st Gen Truck. I'm kind of new to this and was wondering what the main differences are between the 1st Gen Cummins and the 2nd Gen Cummins 12 valve engine.



I'd appreciate any other information regarding the 1st generation trucks.



Thanks in advance.

 

[csevers]

here is the stuff I know

the 1st gen has a VE rotory pump the 2nd has inline P pump I believe the p pump will put out lots more fuel than the ve could even try to. The 2nd gen also has air to air cooler in front of the rad were the 1st gen was intercooled.





anyone to add more info?

 

[nascar mark]

1st gen has a small VE rotary injection pump, a H1C non waste gated turbo, non lock up transmission, rough ride, etc.





2nd gen has a large P7100 piston pump, a HX 35 waste gated turbo, lock up transmission, smooth ride, etc.



Conclusion: 1st gen, easier to work on but has limited hp due too pump.

2nd gen harder to work on but has more hp potental due to pump.



Turbo's aren't much different.

Trannys are simular but lock up has its goods and bads.

Probly left out some.



Good luck

mark

 

[hdm48]

The after cooler is of the same type, just smaller in the first gens.

The first gens look better.

The first gens work harder.

The first gens will haul more weight.

The first gens cost about $20,000 less



-dave-

 

[JFitzgerald]

Don't be shy!

Dave, Tell us how you really feel about the first gens.



I do agree, by the way.

 

[KMC]

Yes I agree too! Dave's last point is a biggie. Leaves lots of money for all the add-on goodies and HP improvements. Which is what most of the folks on this board like to do - bombs away.....

 

[rwinslow]

Some random thoughts . . . . . .



2nd generation front end ball joints tend to be a weak point 4x4 models).



1st generation front end is heavy duty but bone jarring rough and tends to eat all but the very best shocks (4x4 models)



1st generation Getrag has to be babied with an additional quart of oil added to the mfr's suggested amount - the Cummins will easily exceed the transmission capabilities.



2nd generation NV 4500 has a lot more torque and load capacity but is very sensitive to the type of lube used.



1st generation body parts are getting very difficult to find unless a salvage yard is utilized.



1st generation aftermarket parts are also difficult to find - that is why this is such a great group - everybody tries to help everyone else.



1st generation is generally very easy to work on and accessible.

 

[Case500D]

And to add to everyone elses comments, nothing beats seeing a 1st gen grill shaking in the rear view mirror of some smaller vehicle I got my truck for all of the above reasons, but also for the fact that I like something that not a lot of other people have. The 1st gens fall into that category. The engines are very easy to work on and have decent hp capabilities, just ask nascarmark. I like the fact that I can get driveline parts and such from older Dodge trucks that are in salvage yards. I. E. I just put a set of overload springs off an '83 1 ton and they bolted right up. I guess my point is that you won't go wrong with one of these trucks.



Jeremy

 

[rmrc]

Well guys,,,,,,,,,,,,,,,,,,,. Unfortunately, I wasn't fast enough and the truck I was considering has been sold.



This truck was in super mint condition with many upgrades.



If any of you know of someone who is looking to sell a 1st Gen in exceptional condition, send me an e-mail,,,,,, that is, if you don't decide to buy it yourself.

 

[CPG]

Re: Don't be shy!

The first generations are a good truck. I have a "93" with just 104,000 miles on it, mostly pulling a 26' Alpenlite 5vr. With the trailer I cannot complain about the ride as it is excellant. Without, its somewhat rough, but a truck is a truck.

The short side is the Bosch rotary pump that can only put out so much HP. With the 2nd. generation with the inline P-7100 pump, the limits of power improvement are much better, along with longer pump life. Newer is sometrimes not better. One sees a lot of these older trucks on the highway, so that must mean something.

 

[Joe G.]

Chuck (CPG) knows my '95 truck pretty well. It is a 4X4 and has 201K miles on it now. No front end problems at all except for replacing a worn axle U-joint a couple of weeks ago. I've had three yards of crushed rock on it (rock yard messed up the measurement) with no trouble. NOT good for the tires. That shows that a 2nd gen truck will haul the weight since the back road I live on has a steep place that is a 9% grade.



Chuck's truck is a 4X2 so it rides good. If you want to see a REALLY nice 1st gen truck get a look at his. You will need sun glasses when he opens the hood because of all the chrome. He usually wins the 1st gen show and shine at MM with it.



I would have bought a '93 except for the back seat in the extended cab and the rough ride of the 4X4. I like the looks of them. The lock up torque convertor in my 47RH transmission is the real deal. Would not be without it. I've spent a little over $300 on more power stuff. HP to the ground is a over 255, probably close to 270. It will go 100 MPH before the governor kicks in.



Whatever model you like they are very hard to wear out and very good trucks.

 

[BushWakr - RIP]

I see that a lot of the major points have been covered so I'll go in a slightly different direction.....



1st Gen visual aid when you see a 1st Gen coming... ... Your sitting in your car and you suddenly realize you've stopped on the tracks at a RR x'ing... . you look up and see your worst nightmare coming with a full head of smoke laying waste to the sky,... . You're VERY first thought... ..... OMG, I'm pooched !!, this is it, I'm meeting my maker... .

Ok, got it in mind. . ??



NOW,



2nd Gen visual aid..... your sitting in your car and you look up... you see a 2nd Gen coming and you think... ... . OMG, it sure is pretty, I hope it don't bounce off and hurt someone !!!



there, I hope that helped a bit..... ... now to be fair you have to have some compassion for a an overvalved, pacemaker'd patient...



bob.

 

[nascar mark]

:-laf :-laf :-laf



mark