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Thread: Who makes the best rev box?

  1. #1
    Join Date
    Jun 2004
    Location
    Madison, WI
    Posts
    1,644

    Who makes the best rev box?

    Who makes the best rev box?
    Research Assistant
    Engine Research Center
    University of Wisconsin-Madison
    Department of Mechanical Engineering

    2003 400ex
    2005 Arctic Cat F7 EFI

  2. #2
    Guest
    i would say big gun cuz it gives u 1 hp some how.

  3. #3
    Join Date
    Sep 2004
    Location
    Claremont, NH
    Posts
    563
    gives u 1hp??
    02' Silver 440ex
    Full P&P, Edelbrock Doug Eichner 440 carb, Motoworks SR4, Hotcams, Wiseco 11:1, Hotrods...

  4. #4
    Guest
    big gun claimes ther rev box gives a 400ex 1 more horse power but on a 400ex their useless cuz a 400ex stops making power in the 8000 rpm's so that extra 1000rpm is useless at less some one cant shift right.

  5. #5
    Join Date
    Nov 2005
    Location
    Callery, PA
    Posts
    501
    yeah ive heard dont use rev boxes bc sometimes they r hard to start
    1999 440EX #137
    Pro Armor Killswitch
    IMS 440 Graphics
    High Velocity Porting
    Black Powdercoated Stock Rims Flipped on back
    AC bumper
    K&N Airfilter
    White Bros.E-Series Exhaust
    Full Skid Plates
    +2 Lonestar Swing Arm
    Pep Remote Rezzie Shocks
    Steering Dampener
    Fatty Bars
    No Airbox Lid

    Stock LT-Z 250
    No airbox lid


    "My Thumb Can Press The Magic Button"

    I Want A YFZ!!!!!!!


    $-Kevin-$

  6. #6
    Join Date
    Nov 2005
    Posts
    42
    Rev boxes are useful in the bigger bores according to people who know stuff(not me)

  7. #7
    Join Date
    Aug 2002
    Location
    Staunton, Illinois
    Posts
    7,259
    with an aggressive cam, they are useful. i would get the gt thunder one. if price isn't a concern, look in to msd.
    2005 450r

    *sold* 2001 400ex

    "If you think you can, you can. If you think you can't, your right."

    "A leader will take you where you want to go. A great leader will not necessarily take you where you want to go but where you ought to be."

    "If you want to do something, you will find a way; if you don't, you'll find and excuse!"

    "Its not aptitude but attitude that determines your altitude."

  8. #8
    Join Date
    Feb 2005
    Location
    ohio
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    i wouldnt doubt it if all of them came from the same company

  9. #9
    Join Date
    Apr 2002
    Location
    clarksville, TN
    Posts
    6,054
    Originally posted by 2muchquad
    i wouldnt doubt it if all of them came from the same company
    the white brothers and big gun do come from the same company, HONDA. its a stock xr250 box, which is a kickstart. something about that is why you get the starting troubles when put on a electric start 400ex. curtis sparks and gthunder make there own and neither have any starting issues. i suggest the gthunder. i beleive he even has a few different boxes (different power curves) so you can choose what fits your needs

    and yes, the 400ex stops making power well before the rev limit, so unless you have a cam and porting that is set up to rev REALLY high, a rev box is useless unless it alters the power curve before max rpm or moves max power past the stock limit
    Planning a comeback...

  10. #10
    Join Date
    Jun 2004
    Location
    Madison, WI
    Posts
    1,644
    I do realize that i won't have s*** for power up top but all I want is a couple mph for lake running. It would still wind out good right?
    Research Assistant
    Engine Research Center
    University of Wisconsin-Madison
    Department of Mechanical Engineering

    2003 400ex
    2005 Arctic Cat F7 EFI

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