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  1. #1
    Join Date
    May 2008
    Location
    Southern WI
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    Tune for UDP needed?

    I want to get a set of pulleys (UD crank, OD alt) and I just want to make sure there isn't anything that needs to be done with the tune? I'm goin to the track Oct. 18th and want to buy these before then. Thanks dudes!
    Mike
    2000 RCSB
    '05 LS2 11.5:1 C.R. l K&N l LT's l Torquer V2 l PAC Springs l Manley 7.4's l 92mm TB l LS7 Lifters l Circle-D 3200 l P&P TB l ARP Rod Bolts l LS1 E-fans l Nelson 93 Tune l Brand-X 100 Shot l Walbro 255 l Duals w/ X and Magnapacks l Vette Servo l Transgo S.K. l 30K Cooler l Detroit Tru-Trac l Motive 4.30's l ARP Cap Studs l TA Girdle

  2. #2
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    No tune required.


    you'll need to find a bolt the correct size and MUCH longer to start the pulley on the shaft (or put a piece of 2x4 over it and beat on it for 10 minutes)

    you also need a new bolt for the new pulley. I got mine from lmp, it's an SLP unit, pulley and bolt were like 180 shipped, GREAT DEAL. You will need 2 people for sure, I used an impact to get the original bolt off, made it A LOT easier. Then you'll need a chrysler style harmonic balancer puller from local parts store.
    blown transmissions are about as useful as 97% of the guys on this forum

  3. #3
    Join Date
    May 2008
    Location
    Southern WI
    Posts
    460
    Thanks for all the info, I'm lookin forward to buying it. How much of a difference did you notice from it...I read a lot of mixed stories haha.
    Mike
    2000 RCSB
    '05 LS2 11.5:1 C.R. l K&N l LT's l Torquer V2 l PAC Springs l Manley 7.4's l 92mm TB l LS7 Lifters l Circle-D 3200 l P&P TB l ARP Rod Bolts l LS1 E-fans l Nelson 93 Tune l Brand-X 100 Shot l Walbro 255 l Duals w/ X and Magnapacks l Vette Servo l Transgo S.K. l 30K Cooler l Detroit Tru-Trac l Motive 4.30's l ARP Cap Studs l TA Girdle

  4. #4
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    on average .5 mpg...and OCCASIONALLY can spin tires from a stop (NEVER could before). I'm sure it's not much, maybe .1-.2 on the quarter, but every little bit helps.
    blown transmissions are about as useful as 97% of the guys on this forum

  5. #5
    Join Date
    Mar 2009
    Location
    Tyler, TX
    Posts
    871
    where can i buy an underdrive crank pulley for truck?
    [IMG]https://images.app.goo.gl/XLfskemekXBo5VfS7/IMG]
    www.tjc.edu

  6. #6
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    i really like the slp units. Come with bolts. LMP sells them the cheapest. Does not come with alt pulley, but i didn't want one either.
    blown transmissions are about as useful as 97% of the guys on this forum

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