What Is the Best Rpm to Tow With a 12v Cummins
1989-1993 Contrivance D/W 250 & 350 with v.9L Cummins 12V Diesel engine
If yous're familiar with diesel trucks, you've probably heard of the first generation Cummins. In my opinion, it'southward by far the most reliable diesel engine always put into a pickup truck, with the only close competition coming from the seven.3L Powerstroke. Even today, 30 years subsequently later on their inception, there are multitudes of 1st Gen 5.9L Cummins trucks on the road. When the 5.9L 12-Valve Cummins engine was introduced to Dodge's D/W truck lineup, it created a new standard for OEM diesel performance. The 1st Gen 5.9L Cummins had unique specs never before seen on a diesel pickup truck, including a Holset fixed geometry turbocharger and directly fuel injection. These allowed Dodge'south D/Westward 250 and 350 to give truck owners a all-time-in-form 400 lb-ft of torque while also improving drivability and throttle response.
Although the 160 horsepower and 400 lb-ft of torque doesn't seem impressive past today's standards, they were very impressive for the time. Today, we know the first gen Cummins to be capable of producing high horsepower and torque numbers incredibly easily. Loftier operation numbers can also be achieved cheaply, and the 6BT engine is more than than capable of handling actress power without adding too many back up modifications. We'll go into more detail on increasing functioning on our starting time gen v.9L Performance upgrades post.
1st Gen 5.9L Cummins Reliability
There are a lot of contributing factors to the impressive reliability of the 5.9L Cummins. The engines were built to be robust, considering they were initially created for commercial and agronomical applications. They also lacked modern emissions devices and circuitous electronics, both of which give greater opportunities for failure. Take you always heard of the acronym, "KISS"? It stands for "keep it elementary stupid". That's exactly what Cummins and Ram did. By using an inline-half dozen engine design, they had less problems considering they had less parts. These engines also take up less space than a traditional V8, making it so easy to fix and piece of work on these trucks.
Variations of the five.9L Cummins are often used in race competitions or sled pulling events because of their power to take a beating. Here are some of the key features that make these engines and so durable.
- Gear-Driven Components
- Large Crankshaft & Forged Steel Connecting Rods
- 7 Main Bearings
- half-dozen Head Bolts per cylinder
- intercooler
- turbocharger
Key Operation Characteristics
The fuel injection and forced air induction systems play a major office in 5.9L Cummins performance. The 12v 5.9L Cummins was the first engine to deploy direct injection as its fuel injection strategy. It was also the first to offer a turbocharger and an intercooler.
v.9L Cummins Fuel Injection Organisation
Unlike Ford or GM's viii cylinder diesel pickups during the aforementioned time period, the 12v Cummins used direct injection. Straight fuel injection results in greater efficiency by injecting fuel directly into the combustion sleeping accommodation. There isn't any pre-combustion issue and it led to noticeable power gains over traditional indirect injection engines.
Forced Air Induction System
The 1st Gen Cummins was the start 3/4 ton and i ton diesel engine to use a turbocharger to increase performance. Information technology was revolutionary for the time, and had a huge bear upon on drivability and towing adequacy. Turbochargers increase the amount of compressed air getting to the engine past using exiting frazzle gases. More than condensed air means more than ability, fuel economy, and meliorate towing performance, specially at college altitudes.
An intercooler was added in 1991 to further raise the air induction arrangement. Intercoolers absurd the compressed air from the turbocharger, creating denser air that enters the engine. Denser air results in a more than efficient combustion procedure. That means greater fuel economy, lower EGTs, and more power. This feature makes the 91.5-93 model twelvemonth trucks slightly more desirable than 89-91 trucks.
Get-go Gen Cummins Transmissions
The v.9L Cummins engine could be paired with either a transmission or automated manual. The Getrag 5-speed manual manual is the ideal partner to this Cummins engine. Information technology holds up to extra horsepower the best, and with the improver of a performance clutch, it can help make some large numbers. The early automatic transmissions were clunky, and don't hold up to the extra power besides. They're also more expensive to fix and rebuild. The 2 automatic transmissions available on the 1st Gen Cummins are the A727 Torqueflite 3-Speed Automatic and the iv-speed A518, or 46RH, automatic transmission with overdrive. The 46RH is more desirable between the two automatic transmissions every bit it will allow for much better fuel economy.
Manual Options 1989-1993 Dodge Diesel Trucks
Take a look beneath at the chart to see the available transmissions on 1989-1993 Diesel Ram trucks. I included a ranking system to show which transmission is most desirable. The standard manual on Cummins diesel trucks is 5-speed Getrag 360 and it is as well the virtually desirable.
| Ranking | Type | Transmission |
| 1 | 5-Speed Manual Manual /w Overdrive | Getrag 360 |
| 2 | iv-Speed Automatic Transmission /west Overdrive | A518 (46RH) |
| 3 | 3-Speed Automatic Transmission | A727 |
1st Gen 12 Valve five.9L Cummins Specs
| 1st Gen v.9L Cummins Years: | 1989-1993 |
| Common Names: | 6BT Cummins 12V or 12 Valve Cummins 1st Generation Cummins |
| Engine Design: | Inline-6 Cylinder |
| Cake: | Cast Atomic number 26 |
| Cylinder Head: | Cast Iron /west six Head Bolts per cylinder |
| Displacement: | 5.9 Liters or 359 Cubic Inches |
| Bore: | iv.02″ |
| Stroke: | iv.72″ |
| Compression Ratio: | 17.0:ane |
| Firing Gild: | ane-five-3-vi-2-4 |
| Fuel Injection: | Bosch VE44 Mechanical injection pump, mechanical injectors, straight-chamber fuel injection |
| Turbocharger: | Holset Fixed Geometry Turbocharger (VGT) |
| Valvetrain: | Overhead Valve Engine (OHV) 2 Valves Per Cylinder |
| Pistons: | Bandage Aluminum |
| Transmissions | – Getrag 360 v-Speed Manual – Torqueflite A727 3-Speed Automatic – A518 (46RH) 4-Speed Automatic Transmission with overdrive |
| Battery | Early on Models – One 1,025 CCA Battery Later Models: Dual 750 CCA Batteries |
| Weight: | one,100 lbs dry |
| Engine Oil Capacity /w Filter: | 12 Quarts or 11.4 Liters |
| Fuel: | Diesel |
| Governed Speed: | two,500 RPM |
| Horsepower | 160 horsepower @ ii,500 rpm |
| Torque | 400 lb-ft @ 1700 rpm |
First Gen v.9L Cummins History
Ford and GM already had diesel trucks available with vastly superior torque, towing, and fuel economy compared to Dodge'due south gas-guzzling line-up. Sales were low, and Dodge needed an answer. In 1989, Contrivance partnered with Cummins, incorporating a five.9L 12-Valve Cummins engine into the D/W 250 and 350 trucks. The first generation Cummins engine single-handedly saved Contrivance's truck line-up, and gave them the power to compete with Ford and GM.
This beginning engine supplied by Cummins is known by a couple of different names including the 6BT Cummins or 12-Valve Cummins. People familiar with the diesel manufacture refer to Dodge's 1989-1993 D/W 250 and 350 lineup every bit the 1st generation Cummins. The engine was originally used in agronomics solutions which turned out to be a groovy thing for owners. These trucks are built incredibly solid, almost over-congenital for a 3/4 ton or i ton pickup truck.
The partnership between Dodge and Cummins was then successful that information technology however exists, with a new six.7L Cummins engine used in Ram'due south 5th Generation trucks today.
1st Gen 5.9L 12v Cummins Tow Capacity And Payload
1st Gen five.9L 12v Cummins towing specs vary depending on cab and model configurations. Max tow capacity for a Starting time Generation 5.9l Cummins is 11,900 lbs. Take a look at your owner's transmission for the exact towing and payload limitations of your vehicle.
| Model | Trans. | Rear Axle Ratio | GVWR | Max Trailer weight |
| D250 4×2 Reg Cab | Getrag Manual 46rh Auto /w Libation | 3.07/3.54 iv.x 3.54/4.10 3.54 | 8,510 lbs viii,510 lbs 8,510 lbs viii,510 lbs | 10,900 lbs 11,900 lbs vii,000 lbs 9,000 lbs |
| D250 4×2 Club Cab | Getrag Manual 46rh Auto /w Libation | 3.07/three.54 4.10 three.54/4.x 3.54 | 8,510 lbs eight,510 lbs viii,510 lbs 8,510 lbs | 10,600 lbs 11,600 lbs 6,700 lbs 8,700 lbs |
| D350 four×2 Reg Cab SRW | Getrag Manual 46rh Automobile /w Libation | iii.54/iv.10 three.54/4.ten 3.54 | 8,700 lbs 8,700 lbs 8,700 lbs | 10,900/11,900 lbs 7,000 lbs 9,000 lbs |
| D350 iv×2 Reg Cab DRW | Getrag Transmission 46rh Automobile /w Libation | three.54/4.x 3.54/4.10 three.54 | 10,100 lbs 10,100 lbs 10,100 lbs | 10,700/11,700 lbs 6,800 lbs 8,800 lbs |
| D350 4×2 Club Cab DRW | Getrag Manual 46rh Auto /w Libation | 3.54 four.10 three.54/four.10 3.54 | ten,100 lbs ten,100 lbs 10,100 lbs 10,100 lbs | x,400 lbs 11,400 lbs 6,500 lbs 8,500 lbs |
| W250 4×iv Reg Cab | Getrag Manual 46rh Auto /w Cooler | three.07/three.54 4.10 3.54/4.10 3.54 | 8,510 lbs viii,510 lbs 8,510 lbs viii,510 lbs | x,400 lbs eleven,400 lbs 6,500 lbs viii,500 lbs |
| W250 4×4 Club Cab | Getrag Manual 46rh Automobile /westward Cooler | iii.07/3.54 4.x iii.54/four.10 three.54 | 8,510 lbs 8,510 lbs viii,510 lbs 8,510 lbs | 10,100 lbs 11,100 lbs 6,200 lbs 8,200 lbs |
| W350 4×4 Reg Cab SRW | Getrag Manual 46rh Auto /due west Cooler | 3.54/iv.10 3.54/4.ten 3.54 | 8,700 lbs eight,700 lbs 8,700 lbs | 10,400/11,400 lbs 6,500 lbs 8,500 lbs |
| W350 four×four Reg Cab DRW | Getrag Transmission 46rh Auto /w Libation | 3.54/iv.ten 3.54/4.ten 3.54 | 10,100 lbs 10,100 lbs 10,100 lbs | x,200/11,200 lbs half dozen,300 lbs 8,300 lbs |
| W350 4×iv Guild Cab DRW | Getrag Manual 46rh Motorcar /w Cooler | 3.54/4.10 3.54/4.10 iii.54 | 10,100 lbs 10,100 lbs x,100 lbs | 9,900/x,900 lbs 6,100 lbs 8,100 lbs |
First Gen five.9L Cummins Cab Specs
You'll find a list of 1st gen 5.9L Cummins cab specs below. These cab specifications are based off of the 1993 model twelvemonth Ram D/West 250 and 350 trucks. Crew cabs weren't available on these models. The two cab configurations were regular cabs and society cabs. The Club cab truck is the equivalent of today'south extended cab. They had long and curt bed configurations available with both regular cabs and club cabs.
1993 Contrivance Ram Truck
| Model: | wheelbase | Full Length | Box Length | Box width | Box depth | Tailgate Opening |
| Reg. Cab Short bed | 115″ | 193.viii″ | 76.9″ | lxx.0″ | 19.1″ | 67.36″ |
| Reg. Cab Long Bed | 131″ | 213.viii″ | 96.ix″ | seventy.0″ | nineteen.one″ | 67.36″ |
| club cab curt bed | 133″ | 211.8″ | 76.ix″ | seventy.0″ | 19.1″ | 67.36″ |
| order cab long bed | 149″ | 231.8″ | 96.9″ | lxx.0″ | 19.1″ | 67.36″ |
Interior Specs
1993 Dodge Ram Truck
| Head Room | 40″ |
| Shoulder Room | 64.two″ |
| Hip Room | 65″ |
| Leg Room | 39.4″ |
Other Starting time Gen Cummins Resources
Larn more than 1st Gen 5.9L Cummins specs and information in the resource below. Click on the links to go to that page.
- 1st Generation Cummins Maintenance Guide & Parts List
- All-time 1st Gen Cummins Performance Upgrades
Source: https://dieselresource.com/diesel-resources/1st-gen-5-9l-12v-cummins-specs/
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