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View Full Version : Are these race legal?


VintageRacer
08-08-2007, 08:53 AM
Saw these (http://cgi.ebay.co.uk/TWO-SPEED-TRANSMISSION-FOR-RC10-1-8-1_W0QQitemZ130141112851QQihZ003QQcategoryZ19168QQs sPageNameZWDVWQQrdZ1QQcmdZViewItem) on ebay, interesting. I doubt they are race legal and they would push the motor over quite a bit shifting weight and making it a bit vulnerable to damage.

I vaguely remember that there was a car in the 80's with this kind of thing as standard.

Richard Lowe
08-08-2007, 09:17 AM
I don't think they are legal, looking at the size of the gears a modern brushless system would probably rip the gears apart too :wtf:

jimmy
08-08-2007, 10:07 AM
Yeah I don't think they would stand up to a powerful motor - but I've never heard of a rule against them myself and can't see anything wrong with it.

Chrislong
08-08-2007, 10:42 AM
I think there is a rule on changeable ratio's, if I remember rightly, need to dig out my BRCA handbook.

Although, for entertainment value id like to try one, and see how long it takes for me to melt it.

trekkerkk
08-08-2007, 12:23 PM
the old mini mustang had an option for a 2 speed system


trekkker

dallasv8
08-08-2007, 02:38 PM
the mini mustang and a couple of others had 2 speeds that after a while i think they banned the 2 speeds

Chequered Flag Racing
08-08-2007, 03:05 PM
I think there is a rule on changeable ratio's, if I remember rightly, need to dig out my BRCA handbook.



just searched BRCA 1/10th Off Road and can't find anything to say it can't be used

antnee
08-08-2007, 07:03 PM
A multiple speed transmission is illegal in TC's but there is no mention of it in the 1.10th off road section

These 'boxes can handle quite a lot of power, I know of one in a zx5 with a high power brushless which hit 70mph!

terry.sc
08-08-2007, 08:47 PM
2 speed transmissions are perfectly legal in off road, whether it gives an advantage in off road is another matter. The PB Mustangs ran with 2 speeds and they still got beat by the CAT.

They are banned in touring cars, highly likely because when they formulated the rules HPI had a 2 speed gearbox on the RS4 and it was likely that every manufacturer would need to make a gearbox for their cars.

mole2k
09-08-2007, 02:26 AM
One of these could be fun for speed runs in my pro-ten, gear it way up higher and see what sorta speeds i can hit!