[SMPetersen]

Suspension work, fuel storage, great tuning, tall gears, z rated rubber I think it can be done. Hell even a bfg load range E is speed rated at 155. I do 100mph plus in my SIG truck all the time. It rides great almost better than my 3 series BMW. This guy isn't going to take a bone stock truck and do this. He is going to rebuild the truck to make it safe for the speeds he Plans on doing. And that will involve replacing the 20 year old suspension parts.

 

[me78569]

I'm sorry but there is zero comparing any of the bmw's I have owned and my current one to any truck I have ever been in above 60 mph. The thought is laughable.


Anyways good luck OP don't kill anyone

 

[SMPetersen]

Anything with sport tuned suspension rides like garbage. Hold the ground handles well that's what its for. An E46 M3 sucks to just drive. Normal BMW built for comfort.

 

[Ed Font]

This all sounds like bar talk. Anyone serious enough with enough money and knowledge to pull this off wouldn't be asking for advise on a forum. How about a record for nonstop or something a diesel is good at.

 

[Mopar1973Man]

tall gears and adapt a built transmission. there is no need to redline the truck or overrevv it.

you will need to swap to D70HD (it can run lower gears than a D80 can) and regear to 3.07

run 30" tires that are "Z" rated

and get a BUILT Tremec T56 with a .50:1 final drive ratio in 6th and adapt it to the cummins. probably need a custom made clutch and flywheel. deal with it...you want to go this fast, pay up sucka!

this trans will save you weight, and drop your rpm's below redline. and it is RATED to handle 700lbs/ft torque... means you can probably run some big injectors and mild twins with electronics set to timing only...this is a duration run, we don't need canbus fueling or wiretap fueling...just timing and more air.

fluidamper would be a good idea...custom balanced driveline...definitely a 2wd truck...adapting a T-56 to 4wd would be ridiculous.

light wheels and tires, aux fuel tank in the bed with a bed cover to reduce wind drag. slam and stiffen suspension for lower center of gravity and improved handling. full cage for safety.

make sure everything works on the truck, gauges, upgraded lift pump, and add a trans cooler to the T56. means a pump, a radiator, and lines for just the trans.

flat black paint job, flat black rims. 4" exhaust with hushpower mufflers. (run two if you have to. make it quiet!) lots of 2-cycle oil to mix with the fuel...it will help quiet down the injection pump.


this combo will pull off 160mph @ 2750rpm. below redline :thumbsup: the cummins can take that all day long.

7x.010 injectors with hx35 over S472 twins will make all the power you need with perfectly manageable EGTs and won't push excessive boost...upgrade to spring clamps and silicone boots just for safety though. you won't have a boost leak from that and won't be pushing any more boost than a large single would...should be in the 45-55psi range without wiretap fueling which wont be needed for a duration run. and we don't want to overtorque the final drive gear either...


at the speeds you will be running, this will give the most economy it can, but at normal speeds this setup might actually yield 28-30+mpg with the steep gearing and as much weight/drag reduction as you can give it.

That might be a problem. :confused013: Depends on the engine RPM's that this is running. If he running high in the R's then I would actually switch to Opti-lube and away from the 2 Cycle Oil because of the higher cetane. But if your going to re-gear the truck to run 1,500 to 2,000 RPM cruising then no problem mix it up 128:1 and run with it.

 

[046spdH.O.]

What about some ram srt-10 suspension parts and body parts? Might need heavier springs and shocks though. That is assuming you can get a 3rd gen for a decent price.


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[jigabop]

he says the top speed will be 160...so that gearing will put him in some nice average rpm ranges...

honestly though a cummins truck is not the vehicle to do this in. it's just too damn heavy and not very aerodynamic, nor does it have the handling required for these kinds of speeds...


My old 94 Z28 camaro would have been perfect for this run.

its low to the ground and wide stance with Z rated tires and light wheel factory...

its a T56 6-spd factory with 3.43 posi rear factory...

it can pull off 140mph in 5th gear before even needing to shift to 6th gear...

it gets 20+mpg cruising at 80mph on the freeway because the car is built and geared for speed. it will handle at 80-120 no problem... 140+ gets a little sketchy and would need front and rear FUNCTIONAL wings to improve handling at these speeds as it tends to get very light and floaty at 150+ not pulling this out of my as$...I know from personal experience the car flat out wants to come off the ground at over 150+ give it a huge gust of wind and it would probably fly right to the scene of the crash!

with the proper downforce wings on front and back this can be addressed to keep the car firmly planted to the pavement, but the wings have to be done right...not a stupid ricer wing that is looks only...needs to be bolted to unibody, and properly adjusted for the amount of downforce necessary for the speed desired...


brakes should be addressed too. upgrade calipers to hex piston in the front and quad piston in the rear with drilled and slotted rotors.

 

[TURBOLVR]

Wonder how many feet it takes to completely (and suddenly) stop a 7000# truck going 150mph? :S:

 

[hdhorton]

Wonder how many feet it takes to completely (and suddenly) stop a 7000# truck going 150mph? :S:

Yeah I was just about to say he better be lookin in to some good brakes haha

 

[Mopar1973Man]

he says the top speed will be 160...so that gearing will put him in some nice average rpm ranges...

honestly though a cummins truck is not the vehicle to do this in. it's just too damn heavy and not very aerodynamic, nor does it have the handling required for these kinds of speeds...


My old 94 Z28 camaro would have been perfect for this run.

its low to the ground and wide stance with Z rated tires and light wheel factory...

its a T56 6-spd factory with 3.43 posi rear factory...

it can pull off 140mph in 5th gear before even needing to shift to 6th gear...

it gets 20+mpg cruising at 80mph on the freeway because the car is built and geared for speed. it will handle at 80-120 no problem... 140+ gets a little sketchy and would need front and rear FUNCTIONAL wings to improve handling at these speeds as it tends to get very light and floaty at 150+ not pulling this out of my as$...I know from personal experience the car flat out wants to come off the ground at over 150+ give it a huge gust of wind and it would probably fly right to the scene of the crash!

with the proper downforce wings on front and back this can be addressed to keep the car firmly planted to the pavement, but the wings have to be done right...not a stupid ricer wing that is looks only...needs to be bolted to unibody, and properly adjusted for the amount of downforce necessary for the speed desired...


brakes should be addressed too. upgrade calipers to hex piston in the front and quad piston in the rear with drilled and slotted rotors.

I can agree and admit my old 1973 Dodge Charger SE was floaty about 135-140 MPH with even that big block 383 in it for power plant. I would tend to say the ultima fast car for this kind of trip would of been the old 1971 Super Bird. Now there is a vehicle design for such a road race.

 

[me78569]

There's a reason why Alex Roy used an e39 m5 and this latest guy used an amg 55. They can actually safely cruise at 100+ mph without issues floating around and the huge amount of drag created by the shape of our trucks. That plus being able to go from 150 mph to 65 in a hurry without cooking the breaks and loosing all your braking power.

If you really want to use a cummins scrap the truck and drop the motor into something that is aerodynamic with a suspension designed to do this.

Wonder how many Miles it takes to completely (and suddenly) stop a 7000# truck going 150mph?

Fixed that for you.


I'd personally use a BMW 840i. .29 drag coefficient, load leveling rear suspension, trusty m62b44 motor, and all the comfort in the world.

 

[jigabop]

personally I would probably do the run in a 93 mitsubishi 3000GT VR4.

it's from the factory: 320hp twin turbo v6, full time 4-wheel drive, 4-wheel steering, the suspension automatically adjusts itself for comfort mode or sport mode, the front and rear spoilers adjust automatically for speed to provide down force and work with the suspension to improve the handling of the car.

car already has very large disc brakes. even the exhaust switches from comfort mode (quiet) to sport mode (slightly louder with enhanced performance)

the car was purpose built for speed and had some of the most sophisticated racing technology in it that was normally only found in high end super cars making it a poor mans super car.

they flat out run and handle like they are on rails.

 

[Pele]

Yeah I was just about to say he better be lookin in to some good brakes haha

very large disc brakes.

Yeah, that's my foot... I can get a whole pallet of these babies.

Here's the pads to go with them.

 

[rmgthompson]

I got a cannonball run idea for cummins truck, mine. I'll pick up a load here on the east coast for delivery out west. While I'm out there waiting to load for the return trip I'll drink beer and watch the sun set over the pacific. I'll get my paypal info out soon so ya'lls donations can fund the trip and the beer.

 

[cummins6sp5.9]

Pele. Those look like they fit 18 wheelers ???

 

[me78569]

Who needs a little additional rotational mass :rof

 

[CTR]

if the OP is serious... i think the best bet is the cummins in a 70's super Bee or any car will be way better than a truck

 

[cummins6sp5.9]

I got a cannonball run idea for cummins truck, mine. I'll pick up a load here on the east coast for delivery out west. While I'm out there waiting to load for the return trip I'll drink beer and watch the sun set over the pacific. I'll get my paypal info out soon so ya'lls donations can fund the trip and the beer.

Driving 100 mph and boozin too !!!!

 

[rmgthompson]

Driving 100 mph and boozin too !!!!

Absolutely NOT! I drive the speed limit. arty018:

 

[mrbill]

Pele. Those look like they fit 18 wheelers ???

Not 18 wheelers. Only 8 stud holes. And too big diameter and thickness. I'm guessing rail cars of some kind. Maybe Amtrak or subway.

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