How 'bout those Cummings motors!
There's no 'g' in Cummins.
LOL! I didn't even notice I did that.
Cummins Repower ISF 2.8 for Defenders
- Thread starter Overlander
- Start date
LOL! I didn't even notice I did that.
ersatzknarf
Active member
travelerBT
New member
didn't know if anyone had seen this article from cummins
https://cumminsengines.com/nissan-frontier-diesel-runner
https://cumminsengines.com/nissan-frontier-diesel-runner
Roverman2010
Well-known member
That's been kicking about for years 2014 ish. Never one in person yet, unluss you know differant?
rocky
NAS-ROW Addict
Either its dead or they are waiting for the next gen Frontier/Navarra
https://www.youtube.com/watch?v=yzHmnvWAQss
progress! thanks so much Doug. What drove you to choose that autobox? I'm thinking I'll go autobox as well.
ersatzknarf
Active member
IIRC, it was the customer's request for an autobox. Auto should work well in slippy, muddy work over a manual
Customer/owner preference. The 6 speed per the Cummins gear ratio calculator will work nicely with the GBR 4:10 diffs, 35 inch tires etc.
The 6l80e gets its torque and throttle position readings to determine when to shift via can bus which the Cummins has.
Got it. Any thoughts yet on suitability of a Rover ZF with this engine?
The issue with the ZF isn't as much suitability to the engine so much as the age/ of that technology (pushing 40 yrs now). The ZF's have an internal governor that controls shift points. The 4hp22 is 100% mechanical and even if you swapped out the V8 governor to the one that was used in the tdi disco's or the one used behind the BMW 5cyl diesels, none of those engines had similar torque curves to the Cummins which is pretty much a straight line with max torque @ only 1500 rpm.
IE if you want an automatic that isn't a complete dog you need a modern programmable transmission. The GM 6l80e is a very robust unit and is one of the more popular transmissions currently produced. Try finding a torque converter for an old 4hp22. Had a friend looking last week and the companies he touched base with that can rebuild them need your core first as they have nothing in stock- ie old trans= little demand/support. Modern profit management software is killing parts supplies for old iron. If the argument is parts availability in developing nations, I'd put my money on the current American trans not the antique German one.
IE if you want an automatic that isn't a complete dog you need a modern programmable transmission. The GM 6l80e is a very robust unit and is one of the more popular transmissions currently produced. Try finding a torque converter for an old 4hp22. Had a friend looking last week and the companies he touched base with that can rebuild them need your core first as they have nothing in stock- ie old trans= little demand/support. Modern profit management software is killing parts supplies for old iron. If the argument is parts availability in developing nations, I'd put my money on the current American trans not the antique German one.
exactly advise I was looking for. thanks again for breaking new ground for us.
I'm looking forward to hearing about how you work out motor mounts, power steering, intercooler and radiator.
DefendersNW
Well-known member
The calculator for heat/cooling indicates that the stock 300tdi radiator and intercooler setup will work - we are using Allisport stuff since we have it on the shelf and know it will improve the cooling over a worn out stock unit.
Al Blue4.6l
Well-known member
good lord.
well damn. This is like watching SpaceX progress. Doug is the Elon Musk of Defender conversions!