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Old 09-03-2013, 10:25 PM   #1066
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You can put a 21tooth pinion and the smallest 2nd gear spur on and that's about all you can do. You can run your rear tires a little larger (76mm) too.
Larger rear tires? That's something I have never come across in off road. SO it means as your rear tires gets eaten by the asphalt your car becomes slower.
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Old 09-04-2013, 06:54 AM   #1067
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I am using an Exceed High Torque metal gear servo. THe servo horn is just the standard one that comes with the car. Im starting to think that it's the servo horn because no matter what I do, there is never enough clearance.
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Old 09-04-2013, 10:10 AM   #1068
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Larger rear tires? That's something I have never come across in off road. SO it means as your rear tires gets eaten by the asphalt your car becomes slower.
Yes, as your tires get smaller you will have more torque but less top end because it changes your final drive ratio. A lot is determined by your clutch setting as well as far as the torque goes that is.

I usually start my tires at 72mm to 74mm for quals. I will start them at 76mm for a long main. There is a noticeable speed difference between say a 76mm tire and a 69mm or 70mm tire. Changing tire diameters to get top speed is not where I would go to get that. I would only use gearing. Changing the tire diameter will change the handle of the car.
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Old 09-04-2013, 10:15 AM   #1069
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I am using an Exceed High Torque metal gear servo. THe servo horn is just the standard one that comes with the car. Im starting to think that it's the servo horn because no matter what I do, there is never enough clearance.
I think you are right that it is the stock servo arm. You need to use a thinner metal one like a Hudy or TLR and it should be fine. I am using a KO RSX with the TLR metal arm. I have about 1mm of gap.
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Old 09-04-2013, 10:25 AM   #1070
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I am kinda conused cause there are two sets of gears that you need to consider. If I make the pinion (clutch bell ) bigger by one teeth. Do I need to do it for both the first and second gear pinion? Would the dynamics for off road spur configuration i.e. smaller spur for more top end and bigger for more bottom applies?

Also there are other pulleys included in the kit, are those useful for gaining top end speed or low end torque. Do they go in set? I wish that there is a table or cross reference or different gearing. I know about FDR but not sure why they do it in the different setup sheet.
The way Xray have designed the pinions and spurs, you can change one without changing the other. I am pretty sure you can use any gearing combo without changing the gear mesh. Yes bigger pinion and smaller spur is more top end. You can change only the 2nd gear pinion and leave the 1st one alone.

As far as the kit pullys go, it is for overdrive or underdrive of the drivetrain. They are not used for topspeed or torque.
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Old 09-09-2013, 08:02 AM   #1071
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E rock,

Cool bro, it's clearer now. Under or over driving. So the smaller pulleys over drives either the front or rear of the car. So it means stock setup is balanced? Tia
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Old 09-10-2013, 06:17 AM   #1072
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I think you are right that it is the stock servo arm. You need to use a thinner metal one like a Hudy or TLR and it should be fine. I am using a KO RSX with the TLR metal arm. I have about 1mm of gap.
Thanks mate. Your help is appreciated
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Old 09-10-2013, 09:45 PM   #1073
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Sure thing. Your very welcome.
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Old 09-12-2013, 05:26 PM   #1074
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I know this a stupid question. But do any of you 1/8 onroad owners run regular/ not lola style bodies? And if so which ones?
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Old 09-13-2013, 06:41 PM   #1075
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Hello,

Just purchased a RX8 today and it is going to be my first adventure into nitro on-road. While I was at the National race watching today I noticed what seemed to be 90% of the racers running KO Propo radios, can someone explain the reason for this? I have a Radiopost radio now and am starting to think I might need to switch brands.

Thanks!
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Old 09-13-2013, 06:50 PM   #1076
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your RP will be fine i am using one my self just make sure it is not having any issues the green servo's are sufficient if not over kill protek has a 2300ma lipo that fits and work great
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Old 09-13-2013, 11:34 PM   #1077
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your RP will be fine i am using one my self just make sure it is not having any issues the green servo's are sufficient if not over kill protek has a 2300ma lipo that fits and work great
Thank you for the info. Glad to hear people are using Radiopost for on-road was not looking forward to dropping 600 on a new radio!
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Old 11-11-2013, 10:19 AM   #1078
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Default 2012 upgrade kit

Anyone out there selling the 2012 upgrade kit?

Or a roller for a decent price?
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Old 12-05-2013, 01:18 AM   #1079
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Bump. I picked up a 2013 spec to race next year. My first 8th scale ride. What breaks on these? What are the weak links? Gonna start stockpiling parts now so any info would be great
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Old 12-05-2013, 08:58 AM   #1080
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Bump. I picked up a 2013 spec to race next year. My first 8th scale ride. What breaks on these? What are the weak links? Gonna start stockpiling parts now so any info would be great
Nothing is weak sorry.. so your not gonna buy parts..

This is the parts you need for spare.
Belts
Clutch shoe
Clutch spring
Set of spur gears and pinion gears
Bearings
Front upper and lower arms
Bumper.
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