Dodge Cummins turbo on an RX-1

[..Stiffler..]

Guys I was just talking to a customer here and this is what they are doing...

I dont know all the details but plan to get them...

These guys have been modifying sleds and putting a turbo on from a dodge cummins diesel engine.

has anyone heard anything about this or know how to do it?

im going to try and find out more info and i will let you all know...

 

[BigUglyMan]

Posting to watch due to terminal cheapness and Adrenaline Deficiency Disorder!

 

[whitee]

There was a guy posting on snowest last year that put a turbo out of a cummins on a rev

 

[Kachess]

Yeah, I've heard similar things. Last season Brad Story from Team Thunderstruck had a Cummins turbo on his 800 mod rev. Looked real nasty but work. I think it is on Thunderstruck 4.

 

[bent]

It wont work due to the fact that the turbo is made to run at 3000rpm rather than 10500rpm lots of hotroders try that and it dont work cause spolls at the wrong time it might work on a two smoke but what do i know

 

[Kachess]

It was actually an M7 Brad Story had and they said it was a Cummins. Maby their are full of it, if it will only run 3700rpms. Somthing interesting is Brad Story helped developed the Boondockers sidemount wich is just like his " Cummins" on his M7.

 

[BigUglyMan]

Correct me if I'm wrong, but turbos operate, spool if you will, due to air flow volume. In fact, turbos generally turn at tens of thousands of RPM, if not around 100,000 RPM. More engine RPM equals more exhaust flow which equals more turbo RPM. I imagine it's a directly proportionate relationship. Engine RPM creates the initial airflow to spin the turbo. For every 4 revolutions of the engine a Dodge Cummins will flow 5.9 litres of exhaust (probably more due to the expansion of the air and fuel mixture in the cylinder). A Yamaha 4 stroke should flow aproximately 1 litre of exhaust in 4 revolutions. Based on that you would have to figure that a Yamaha would have to rev approximately 6 times as much to flow the same amount of exhaust to create the same airflow to the turbo. Voila, 12,000 RPM. So 10,500 isn't inconceivable for the Cummins turbo to spool properly.

Now granted, the fuel-air mix in a diesel engine and a gas engine are likely vastly different and likely create a different volume of exhaust. However my rudamentary math shows that it is not completely impossible. Someone with more specialized knowledge will likely be able to prove or disprove the theory. Either that or someone should bolt the Cummins turbo onto their RX1 and report back.

 

[snowy1]

A turbo runs off exhaust gas so it doesn,t care what the rpm is as long as there is enough volume to spin it it. we keep putting bigger turbo,s on these yamaha,s and they seem to just what more.

 

[Sled Dog]

Correct me if I'm wrong, but turbos operate, spool if you will, due to air flow volume. In fact, turbos generally turn at tens of thousands of RPM, if not around 100,000 RPM. More engine RPM equals more exhaust flow which equals more turbo RPM. I imagine it's a directly proportionate relationship. Engine RPM creates the initial airflow to spin the turbo. For every 4 revolutions of the engine a Dodge Cummins will flow 5.9 litres of exhaust (probably more due to the expansion of the air and fuel mixture in the cylinder). A Yamaha 4 stroke should flow aproximately 1 litre of exhaust in 4 revolutions. Based on that you would have to figure that a Yamaha would have to rev approximately 6 times as much to flow the same amount of exhaust to create the same airflow to the turbo. Voila, 12,000 RPM. So 10,500 isn't inconceivable for the Cummins turbo to spool properly.

Now granted, the fuel-air mix in a diesel engine and a gas engine are likely vastly different and likely create a different volume of exhaust. However my rudamentary math shows that it is not completely impossible. Someone with more specialized knowledge will likely be able to prove or disprove the theory. Either that or someone should bolt the Cummins turbo onto their RX1 and report back.

Sorry bud but that is what they will take in their displacement is 1000cc not the exhaust. Once the fire takes place and the exhaust gases are heated the volume would more like 4 or 5 litres. These very same hot gases is what drives and makes a turbo work. The more that goes in the more that comes out and the turbos spins yes up too 100,000 rpms to create the boost pressures.

 

[Sled Dog]

I think a Cummins Turbo Charger would be too big for the application to put on a 1000cc engine. Mind you with the engine rpm difference between these two engines the turbo might work at high rpm. Probably would not work well or have lots of lag/spool time at idle due to the size of the turbo.

 

[SoCoRX1]

ive got a cummins and there is no way that monstrous turbo will fit onto my little sled. The turbo is half the size of my engine....