If that sprocket stands up to drag starts on a bike with twice the HP, I expect it to do well in our cars. I will let you know after a full year. So far, so good with mixed solo and club use including a rear axle failure with chain coming off and tearing around all over the shaft.
jim ----- Original Message ---- From: [EMAIL PROTECTED] To: [email protected] Sent: Thursday, July 13, 2006 10:28:16 AM Subject: RE: [F500] RE: belts vs chains... Is anyone running a splined shaft from Micro Belmont for autocross use? The loads in autocross are different than road racing. Autocross is frequently a drag strip start which puts LOTS of load on the small sprocket. The through the hub distance on a Honda 520 sprocket is only 5/8" The spline contact area is greater than a 1/4" sqaure key in a 1" thru hub distance of a standard Martin Sprocket - so sounds good. Now it comes down to hardness of steel. The bike sprockets are great - I think no problem here. Is the lag shaft spline the weak link? Is the lag shaft spline case hardened after machining? Regards, Lawrence > We quit using Martin gears several years ago & now use Honda 520 sprockets > from sprocket specialists. We get the jackshaft splined by Micro Belmont > in > Grand Rapids Mi. (616) 534-9681 > > Works perfect > > > Thanks ... Jay Novak > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of 500 > Racer > Sent: Tuesday, July 11, 2006 9:33 PM > To: [email protected] > Subject: [F500] RE: belts vs chains... > > I converted my NovaKar J-7B to chain in 2001 for Cal Stewart after his > first race. The data suggested he was > losing at least a second per lap due to belt ratcheting. The conversion > was not difficult. Get a catalog from your > local industrial bearing supplier. I used MARTIN brand gears for the > jackshaft. Had to machine the tooth width > to match the 528 chain. Any motorcycle shop can supply the rear > sprocket. I ordered mine from "Sprocket > Specialties". Use the very best o-ring chain you can find. Last one I > bought was around 125.00. It lasted a > complete season and sat in the tool box as a perfect spare. We did the > same conversion to Brian Novak's car > and he is still running a version of that set-up. With as good as he > runs, I doubt you could say it's any slower > that running a belt. Vibration is NOT an issue. We've broken wheels and > rod bearings and lots of other stupid > things never had a chain failure in either car to date. > > BTW, If you use the Martin gears, make certain to use the heat treated > gears. Don't ask how I know. > > Cheers, JDLayson > > ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ > ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ > > Subject: > [F500] RE: belts vs chains... > From: > [EMAIL PROTECTED] > Date: > Mon, 10 Jul 2006 18:22:18 -0400 > To: > [email protected] > > I"ve started to change my gearing in my 97 phantom going from a 3.45 to > 1 to a 5.0 to 1 to run autocross. The car will light the tires up some > times but other times it I can still bogg it down in my other car with > the higher gearing it is next to impossible to bogg it down. Right now I > hear the belt slipping from a dead stop when I really get on the gas... > I was wondering what is your thoughts about going to a chain. How tight > can I make the poly can it be too tight.. I was told that the poly was > faster for several reasons. The poly does not have as much drag as the > chain.. Also the poly does not have as much vibration. > > > _______________________________________________ > F500 mailing list - [email protected] > To unsubscribe or change options please visit: > http://f500.org/mailman/listinfo/f500 > *** Please, DO NOT send unsubscribe requests to the mailing list! *** > > > _______________________________________________ > F500 mailing list - [email protected] > To unsubscribe or change options please visit: > http://f500.org/mailman/listinfo/f500 > *** Please, DO NOT send unsubscribe requests to the mailing list! *** > _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! *** _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! ***
