LSR Cummins

SHughes

Too much is never enough!
Joined
Jan 7, 2008
Messages
9,290
Since my motor is apart, and I REALLY want to try Land Speed Racing...

How do you make a Cummins live at high RPM for extended periods of time?

I don't know if I would need to turn 5k or be able to keep it there at whatever speeds I may get to, but I would like the motor to live through the experience.

Any help is greatly appreciated!!

Thanks in advance...
scott
 
Make sure your balance job is top notch, good oiling system, good cooling system. Not much else over any other high performance build.
 
put a gear vendors unit behind your trans scott to get the gearing down a little more. make sure the motor is balanced. electric water pump so you're not blowing freeze plugs, springs push rods, roller rockers and cam and tappets, ceramic coated pistons and teflon coated skirts. i forget if your truck is an auto or not but a fan powered trans cooler 1 1/2 times the size really needed. good lock up converter.
 
You want to donate that gear vendors? LOLNot sure i have the coin for coatings, but I'll look into it.I know all the basics of engine building, I don't know the specifics of the Cummins.
 
Make sure your balance job is top notch, good oiling system, good cooling system. Not much else over any other high performance build.

Can you elaborate on the oiling system? Obviously Cummins didn't design things for this use, so I assume it will take a little modification. Now is the best time to get this done, since the motor is still apart.

And speaking of cooling...which coolant by-pass is the best for the best price??

My immediate goal is the Diesel record at Maxton, NC...currently held by Project X. After that, I'll try to make plans for bonneville.
 
Can you elaborate on the oiling system? Obviously Cummins didn't design things for this use, so I assume it will take a little modification. Now is the best time to get this done, since the motor is still apart.

And speaking of cooling...which coolant by-pass is the best for the best price??

My immediate goal is the Diesel record at Maxton, NC...currently held by Project X. After that, I'll try to make plans for bonneville.

you wont need a coolant bypass with an electric pump, but they are pricey, and are known to leak.
 
I was thinking of running both...just to be safe, and I had once found a by-pass from Cummins (I thought) for only $100, but now I can't find it again. LOL
 
Can you elaborate on the oiling system? Obviously Cummins didn't design things for this use, so I assume it will take a little modification. Now is the best time to get this done, since the motor is still apart.

And speaking of cooling...which coolant by-pass is the best for the best price??

My immediate goal is the Diesel record at Maxton, NC...currently held by Project X. After that, I'll try to make plans for bonneville.

While I'm not that familiar with the Cummins oiling system. I would look into doing a windage tray/crank scraper, maybe even dry sump. Don't know if prolonged high rpm will try to fill the valve cover with oil and starve the bearings. Lots of guys deburr return galleys/ restrict oil to the top end in LSR engines so oil can get back to the sump easier. Best bet would be to do as much research as possible to familiarize yourself with what may be necessary to make it live.
 
I was thinking of running both...just to be safe, and I had once found a by-pass from Cummins (I thought) for only $100, but now I can't find it again. LOL

to go cheap, a 5/8 or so line from the back of the head to the t stat housing w/ a pressure pop off valve would do it. most ive seen are using 60 psi valves, but i dont think it needs to be that high. Thats my opinion though.
 
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