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Thread: Jeep Grand Cherokee

  1. #21
    Join Date
    Sep 2003
    Location
    Feeniks, Aridzona
    Posts
    1,114

    Default

    Nice to see progress! Keep at it.
    1987 Jeep Grand Wagoneer...new 6.5 in process...diamond block, 18:1's, other goodies...


  2. #22
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Filled up the other day and calculated 24.75 mpg....I'll take that. We'll see on the next tank, but I can go almost 600 miles on a tank of fuel.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  3. #23
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,382

    Default

    Quote Originally Posted by HH View Post
    We changed the gears to 3:07s.
    Best fuel economy will come with a combination of 1800-2000 rpm and 65-mph. Generally, 3.42 diff gearing, a 700R4 OD and 30" tall tires work well.

    Thanks for keeping us up to speed on your project!

    Jim

  4. #24
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Running ~1700 rpm at 60 mph, and can run at 1400 rpm at 50 mph if I can keep it in 4th gear and the converter locked. Tires are 215/85R16 at 40 psi, could run up to 60 psi.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  5. #25
    Join Date
    Dec 2012
    Location
    Errington, BC, Canada
    Posts
    1

    Default

    Quote Originally Posted by HH View Post
    Filled up the other day and calculated 24.75 mpg....I'll take that. We'll see on the next tank, but I can go almost 600 miles on a tank of fuel.
    When my wife drives she can get a bit over 40mpg out of our 93 Grand.
    I of coarse get closer to 35 mpg. ;>)

    http://www.canev.com/cherokeeConversion.php

  6. #26
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default Mpg

    Last three tanks...

    24.9 mpg
    25.1mpg
    25.9 mpg

    So I'm averaging just over 25 mpg in an SUV that used to get something like 12 mpg.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  7. #27
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,382

    Arrow

    Quote Originally Posted by HH View Post
    If I may make a suggestion. Having an exhaust crossover pipe as close to the exhaust manifolds as reasonably possible will help to improve both performance and fuel economy, and it'll make the engine's exhaust quieter.

    A light-duty 6.2L non-turbo engine can get away without a crossover pipe if the engine is using a light-duty intake manifold with EGR passages. This allows the exhaust impulses to equalize side to side, improving flow. If given the choice, I'd rather use a crossover pipe instead of putting more heat into the intake manifold.

    Thanks for the update. Jim

  8. #28
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Might have to try and squeeze one in there. The exhaust is a bit loud.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  9. #29
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Best mileage to date has been 27 mpg, seems to average about 25.5 - 26 with regular use.

    Died two weeks ago on me. It started, then ran rough, and then stopped. Had to use some WD40 and a fresh charge on the battery (yes only one) to get it started. Appears to be some fuel leaking around the IP at the point where the arm pivots near the bottom. Also found the water pump is leaking. Guess I have a small project now that it is after Christmas....Going to add a second battery now that it is cold too.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  10. #30
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Moving on ... to a new diesel, 2007 Jeep Grand Cherokee with the 3.0 liter diesel. But going to keep driving the K3500 and Savana 6.5s for the heavy duty jobs.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

  11. #31
    Join Date
    Oct 2001
    Location
    Granby, Missouri, USA
    Posts
    3,081

    Default

    Quote Originally Posted by HH View Post
    Moving on ... to a new diesel, 2007 Jeep Grand Cherokee with the 3.0 liter diesel. But going to keep driving the K3500 and Savana 6.5s for the heavy duty jobs.
    Did you sell the 6.2L converted Jeep Grand yet?

    Casey
    1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter

  12. #32
    Join Date
    May 2005
    Location
    SE Wisconsin
    Posts
    488

    Default

    Quote Originally Posted by arveetek View Post
    Did you sell the 6.2L converted Jeep Grand yet?

    Casey
    Nope, hanging on to it! Still drives good. I had an unscheduled job change and needed something more reliable and comfortable for my daily 76 mile ride (38 each way). I was also looking for a 2 door Tahoe/Yukon. I have been averaging about 25 mpg, got just over 26 mpg for 2 tankfuls, but now we are on winter diesel.
    1993 K3500 - Peninsular 18:1 engine, marine injectors, high capacity cooling, AL Core Radiator, 3" DP and 4" exhaust, ISSPRO Gauges, Girdle, AMSOIL Dual Oil Filter System, 1997 Air Filter(trashed the K&N), 395K on Body, 165k on engine.
    1997 GMC Savana - 6.5 TD
    1966 CJ5 - V6 Gas - highly modified
    1967 Jeepster - Stock
    1986 Jeep CJ7 - Stock
    1993 Grand Cherokee - 6.2 diesel
    2007 Grand Cherokee - 3.0 diesel

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