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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components.

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Old 11-17-2012, 09:27 PM   #1 (permalink)
dixiepc
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Batteries

Do we really need two batteries?
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1992 Suburban, J-code 6.2L from a 1986 CUCV, 700R4, NP241
9" lift with straight axle conversion, HP Dana 44 with Loc-Right in front, Dana 60 with Detroit in rear, 4.10 gears, 4 wheel disc brakes
37 x 12.50R16.5LT HUMMV tires (rolls out at 35")
2.5" true duals with Flowmaster SUV 50's with a 2.5" H-pipe just in front of the mufflers bent over the driveshaft

1984 K10 Getting ready for a nice newly refreshed 1982 (changed to a 1989) 6.2 to replace the 350 gasser

1979 K5 Blazer Replacing 350 with a 6.2 CUCV engine. More to come.
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Old 11-17-2012, 09:36 PM   #2 (permalink)
2010flhp
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Yes. Glow plugs pull a lot of current and these high compression engines need lots of amps to rank at the right speed. Running with one battery will shorten the life of the starter.
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Old 11-18-2012, 02:33 AM   #3 (permalink)
Steve83
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Not if your battery, starter, cables, & charging system are in REALLY good condition. If even one of them begins to fail, you'll be push-starting it. You wanna take that chance?
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Old 11-18-2012, 11:09 AM   #4 (permalink)
57diesel
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Us northern folks need 2 but I would imagine it does not get as cold where you are so maybe you could get away with one really good one. The cold lessens the power you get from the battery not to mention makes the engine harder to turn over and then there is the it you take even before cranking from running the glows for longer when its really cold.
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Old 11-18-2012, 02:43 PM   #5 (permalink)
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I've run for extended periods in the hot SUMMER months with one battery to no ill effect. However, if you get any kind of cool/cold weather where you are you'll quickly find out why our trucks came equipped with two batteries.
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Old 11-18-2012, 07:42 PM   #6 (permalink)
JMJNet
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In theory, the cranking amp requirement in this truck required 2 batteries or more than 1 battery can handle.
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Old 11-18-2012, 07:54 PM   #7 (permalink)
dixiepc
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I didn't know if battery technology had gotten better since these trucks were new.
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1992 Suburban, J-code 6.2L from a 1986 CUCV, 700R4, NP241
9" lift with straight axle conversion, HP Dana 44 with Loc-Right in front, Dana 60 with Detroit in rear, 4.10 gears, 4 wheel disc brakes
37 x 12.50R16.5LT HUMMV tires (rolls out at 35")
2.5" true duals with Flowmaster SUV 50's with a 2.5" H-pipe just in front of the mufflers bent over the driveshaft

1984 K10 Getting ready for a nice newly refreshed 1982 (changed to a 1989) 6.2 to replace the 350 gasser

1979 K5 Blazer Replacing 350 with a 6.2 CUCV engine. More to come.
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Old 11-18-2012, 08:07 PM   #8 (permalink)
oil pan 4
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For one of these diesel engines being started with a sraight drive starter you will need 2 batteries.
With a gear reduction starter you could get away with running one big battery because I measured my suburban drawing 330-350 amps with a fluke amp clamp.

Our batteries take up too much room and are located in prime realistate.
Plus putting 100lb +/- 20lb so far forward isn't really the best idea for handling.

I say 100 pounds of battery is 100 less pounds you can tow or carry. My answer:
BYOB, for more power, a lot less weight
A battery about 1/10 the weight and relocated.

With a 2wd sub I would like it to be ass heavy, not nose heavy.
Its starting to get a little ass heavy now that the battery weight has been pulled out of the front end.
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Old 11-18-2012, 08:10 PM   #9 (permalink)
oil pan 4
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Quote:
Originally Posted by dixiepc View Post
I didn't know if battery technology had gotten better since these trucks were new.
There are AGM (absorbed glass mat) and gel cell batteries out now.
And I have a feeling that LiFePO4 batteries will become more popular in the near future with auto makers looking for ways to save weight.
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1984 Suburban C10 with C20 rear spings, Compound Turbocharged with HE351VE and T76, Intercooled, TH700, 3.42 gears ?posi?
P&P GM#162 heads, 506 block, DB2829 injector pump, J-code intake manifold, Pennsular diesel upper plenum.
Banksturbo and HMMWV manifolds, custom cross over, 3'' stainless down pipe and 4'' straight pipe exhaust.
Aluminum 2 core radiator, Electric radiator fans (16''+16''), Meziere electric water pump (55gpm), HD '92+ 6.5L water crossover, grill shutters, Air2oil cooler, 16 core trans cooler, 2 block heaters, two G183 intake heaters, 60G plugs, 3500w coolant heater. ISSPRO tach.
31'' yoko AT-S tires.
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Old 11-18-2012, 11:04 PM   #10 (permalink)
JSarge
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My grandfather has been running a single AGM for going on three years, similar to this XSpower: http://www.sonicelectronix.com/item_...er-XP2500.html. His '93 6.5 spins over just as fast if not faster than mine with dual 850 CCA setup with 0/1 wire all around.
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