Hi,
My rig is a '99 Chevy Express one-ton cargo van. The motor is a 5.7 liter
chevy V8 with the HD tranny (700R6, I think). My normal trailer is a 20
foot enclosed Pace American rallye. With the car and "stuff", the gross
trailer weight is in the 6500 pound range.
I get between 9 and 10 MPG with the enclosed trailer.
With an open trailer, I get more like 13. I only have one data point for
that setup, but it was a 3500 mile round trip tow, so it should be valid.
With the enclosed trailer, if I get a run on the big hills, I can stay
above 50 MPH easily. Once in a while I get boxed in on a hill approach and
then I might drop to below 50 before the hill crests, but that's only
because when the tranny steps down to the lower gear, I get out of the gas
so I don't try to pull a long distance in the lower gear.
This truck has about 140K miles on it, so it's not a spring chicken.
The 5.7 liter Chevy motor that was in the Express Vans from the mid-90's
to the early 2000 range were rated at 225 HP and I believe that number. My
older truck ('84 G10) had similar miles on it, but the motor was rated at
150-ish HP. The difference is amazing. That thing downshifted pulling out
of my driveway. It was HORRIBLE. OTOH, it was close to a junkyard truck
when I bought it and I put a lot of miles on it over the 5 or 6 years I
had it... so, it was "tired", to say the least.
regards,
rml
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Bob Lang Triumph TR6!! | This space for rent
Former NER Solo Chair |
Voice:617-253-7438 | Cell: 339-927-4489
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