Quote:
Originally Posted by Cabana Boy
So if I recall, the rift between Ford and Navistar began when Navistar fell far short of one of it's Diesel V6 engines development specifications (4.5L, if memory serves correctly) in both power and far over in weight and cost. This caused Ford to pull the plug on the whole program, and divorce court was a certainty after they haggled over who should eat the biggest write-off. This goes back like 6 years. I bet Ford saw this coming with the last 6.0L problems and has been busy as a beaver with a hushed Diesel in the works, but could not say so because Navistar was still invited in the house for dinner. Makes for awkward table conversation. Now, all hell broke loose.
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This is incorrect and partially correct - I
think - not sure.
I
think the main error here is that that project was with Caterpillar and was originally started as a participant project in the DOE Light Truck Clean Diesel Program.
The initial engine that was produced
was relatively big and heavy (all sizes 'tried') and not up to the rest of them (in the DOE program) as far as 'power' . (HP and torque)
The power 'lack' appeared to have an easy possible remedy because it used a 'cheaper' '' 'low pressure' HEUI FI system . (More Ford's idea I 'heard')
Highway and City MPG appeared to have been strong - can't remember for sure but I believe it was one of the best with advantages of 'about' 1-3 (city) and 2-4 (highway).
All the above was also effected for better and for worse by the choice of a smaller initial size - motivated by the internal program goal of
doubling the then current F150 4.6L fuel economy numbers.
Ford greatly lowered their participation when in preliminary redesign discussions with Caterpillar, Caterpillar wanted to pursue (correctly as it turns out) much stricter emissions standards.(Ca. LEV2.)
That joint project was referred to as the Caterpillar/Ford 3.0L,V6 HSDI.
There were several different variations built include a twin turbo.
My understanding was it wasn't strictly a weight issue although that was the main problem in the bigger sizes considered.