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Thread: .459 g7

  1. #1
    Join Date
    Aug 2017
    Location
    California
    Posts
    22

    .459 g7

    What happened to 459 opens? Dont seem to be around anymore?

  2. #2
    Join Date
    Nov 2003
    Location
    Koria Finland
    Posts
    318
    Not enough power/ran too hot to go through glue on pushbowl tracks I think - the evolution goes 480 - 490 - even 500 lately.
    zipper

  3. #3
    Join Date
    Mar 2014
    Posts
    202
    I remember the cobalt first cobalt set ups were around .500 diameter , then popular for a while were .496 diameter in the ProSlot "hex" motors , the Camen were I think .500 diameter like the Koford and then some motors had .487 diameter armatures like Fantom and ProSlot and then Koford made the motor and armature .459 diameter , then motors went to .480 diameter armatures , now as was mentioned are .485 , .490 and .500 , .485 diameter is popular today , I am sure there is more but off of memory this is what I remember. I have old armatures that are .459 , .470 (Camen Bandit) .476 (G27) .480 , .485 , .486 , .487 , .488 , .490 , .492 , .495 , .496 , .500 , .510 (old "C" can Mura) and if any of you remember Pocket Rocket they were only around for a short time , the stacks were really short and I think the armatures were made by ProSlot.

  4. #4
    Join Date
    Jun 2002
    Location
    St Charles, Illinois, USA
    Posts
    2,311
    Got a few .459 myself that I putter with for non-wing flat track cars.
    l.d. kelley, M.A. Ramcatlarry@aol.com

    50 year pin 1959-2009
    Racing slot cars in America
    USRA 2009 member 0028, 2017 #404
    IRRA, ISRA/USA, Hardbodies 1/24 & 1/32
    retired raceway owner(for now)
    Omni/Cidex service center

  5. #5
    Join Date
    Dec 2008
    Posts
    153
    Actually the most popular size for open drag racing is .445 to .459 diameter. The .445 is a ground down .459 blank. The 459 or smaller size outperforms larger arms due to the lower inertia of the smaller diameter. The 459 will always out accelerate larger diameter arms due to the better inertia. The actual horsepower is the same. The larger arms have the advantage in 4 or 5 minute heats in terms of cooling. They move much more air and stay cooler. The 459 arm is almost a smooth cylinder and doesn't move much air, this make it overheat in a wing race. Because a drag race lasts less then 1 second cooling is not an issue.

    In F1 motors .460 to .470 is the most popular size. .459 is used also but the .459 is a heavy web open blank so the H blank ground down to .460 is actually a little lighter.

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