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Author Topic: 1988 suburban with cummins 4bta and ford zf5-s42  (Read 137566 times)

Offline Edahall

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Re: 1988 suburban with cummins 4bta and ford zf5-s42
« Reply #45 on: January 17, 2012, 01:43:36 pm »
It'll be interesting to see what kind of fuel economy it gets on freeway.  Have you advanced the timing?
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1990 ¾ ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive
-Upgraded Holset HX-35 turbo
-NP205 iron transfer case
-3.73 gears
-2" Lift

Offline wildcatjason

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Re: 1988 suburban with cummins 4bta and ford zf5-s42
« Reply #46 on: January 17, 2012, 03:02:45 pm »
Yeah. When I had the injection pump rebuilt I went ahead and pushed it toward the head about an eighth of an inch.
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Offline bake74

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Re: 1988 suburban with cummins 4bta and ford zf5-s42
« Reply #47 on: January 18, 2012, 09:51:21 am »
     That's not bad mileage for a 3/4 ton suburban around town.
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#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
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Offline wildcatjason

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1988 suburban with cummins 4bta and ford zf5-s42
« Reply #48 on: January 18, 2012, 12:36:54 pm »
Quote from: bake74 on January 18, 2012, 09:51:21 am
     That's not bad mileage for a 3/4 ton suburban around town.
It's a half ton. Thanks. Long time coming.
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