Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Tranny cooler is in.

Discussion in '1982-Present GM Diesel' started by FWP, Sep 16, 2004.

  1. FWP

    FWP CRS

    Joined:
    Oct 11, 2000
    Posts:
    3,845
    Likes Received:
    3
    Location:
    Prescott Valley, AZ
    Put in a 28K B&M today. Bybassed the radiator cooler/ warmer completely. Here are some numbers before the install...

    Unloaded, 6-7% grade for 5 miles (Black Canyon City to Sunset Point)
    RPMs 2600
    65 MPH
    3rd gear on Th400
    EGT 1050
    Boost 6 psi
    Coolant 200
    Oil temp 210
    Tranny temp 205, sender is in the pressure port.

    Will add more, post-cooler install, next run...
     
  2. Pookster

    Pookster 1/2 ton status

    Joined:
    Nov 21, 2000
    Posts:
    3,195
    Likes Received:
    0
    Location:
    NYC, NY, USA
    tranny temps dont look that bad. /forums/images/graemlins/confused.gif
     
  3. FWP

    FWP CRS

    Joined:
    Oct 11, 2000
    Posts:
    3,845
    Likes Received:
    3
    Location:
    Prescott Valley, AZ
    [ QUOTE ]
    tranny temps dont look that bad. /forums/images/graemlins/confused.gif

    [/ QUOTE ]

    Basically, I just wanted to start a baseline, that said...

    I didn't have a tranny temp gage while driving the same stretch of highway, loaded, pulling my Blazer, but here's some numbers for that. I'll guarantee that alot of the heat came from the tranny. Also had a questionable clutch fan, and a dinky Stant thermostat at the time. Put in a Hayden clutch and a Stant 6.5 thermostat *195(oops- my original post said AC Delco t-stat- that's the next move) since these numbers...

    RPMs 2800
    25 MPH
    1st gear on Th400
    EGT 1050
    Boost 6 psi
    Coolant 230
    Oil temp 240
    Tranny temp ???
     
  4. FWP

    FWP CRS

    Joined:
    Oct 11, 2000
    Posts:
    3,845
    Likes Received:
    3
    Location:
    Prescott Valley, AZ
    Interesting, different stretch of road, mild 2-3% grades for 50 miles, pulling 10,200 lbs.

    RPMs 2800
    45-55 MPH
    2nd, 2nd-over and 3rd, depending
    EGT 1000-1050
    Boost 6-7 psi
    Coolant 215 at the hottest
    Oil temp 220
    Tranny temp 180-ish, (VDO gage has a small 150-200 range)

    Might need to install the Kennedy dual t-stat setup.
     
  5. Pookster

    Pookster 1/2 ton status

    Joined:
    Nov 21, 2000
    Posts:
    3,195
    Likes Received:
    0
    Location:
    NYC, NY, USA
    Thats a bit odd, seems kinda in the high temp range. then again, you are towing some massive weight.

    I'd check the condition of the radiator, it might be a little clogged or something. Also try some water wetter. Stuff works good.

    (BTW, aint those RPMS just a tad bit on the high side?)
     
  6. FWP

    FWP CRS

    Joined:
    Oct 11, 2000
    Posts:
    3,845
    Likes Received:
    3
    Location:
    Prescott Valley, AZ
    Radiator is ok. Pulled it last month, had it sealed and pressure tested. Need more coolant flow I think.

    RPMs are good, top of the HP curve (according to Banks anyway) If my thinking is right (who knows /forums/images/graemlins/screwy.gif) I'm thinking 2800 for HP juice, 2000 for torque and fuel mileage.
     
  7. Pookster

    Pookster 1/2 ton status

    Joined:
    Nov 21, 2000
    Posts:
    3,195
    Likes Received:
    0
    Location:
    NYC, NY, USA
    Unless I already have the upgraded water pump- I looked at how much was pumping out of my heater hose... it is ALOT.

    I wish I could find a picture of a stock 6.2 water pipe.
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,178
    Likes Received:
    1,387
    Location:
    E-town baby!
    [ QUOTE ]
    RPMs are good, top of the HP curve (according to Banks anyway) If my thinking is right (who knows ) I'm thinking 2800 for HP juice, 2000 for torque and fuel mileage.

    [/ QUOTE ]

    Pretty good ballpark Fred. Max fuel mileage unloaded would be around 1800 rpm though. Max hp would be between 2800 and 3600 rpm (governed upper limit)

    Rene
     

Share This Page