26Likes3 racing new F1
02-29-2012, 07:05 AM
#1727
Just finished car 2 with the 90* mounted shorty and center mounted servo and electronics just in front of the motor. I posted a couple pictures of the proposed layout a couple pages back. I still have to paint the body. A shorty will fit in line with the servo mounted this way. A mini servo like a 9650 would make even more room. I'll give a running report after I try it Saturday.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
02-29-2012, 08:06 AM
#1728
Just finished car 2 with the 90* mounted shorty and center mounted servo and electronics just in front of the motor. I posted a couple pictures of the proposed layout a couple pages back. I still have to paint the body. A shorty will fit in line with the servo mounted this way. A mini servo like a 9650 would make even more room. I'll give a running report after I try it Saturday.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
02-29-2012, 09:26 AM
#1729
Tech Master
Just finished car 2 with the 90* mounted shorty and center mounted servo and electronics just in front of the motor. I posted a couple pictures of the proposed layout a couple pages back. I still have to paint the body. A shorty will fit in line with the servo mounted this way. A mini servo like a 9650 would make even more room. I'll give a running report after I try it Saturday.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
02-29-2012, 09:41 AM
#1730
Just finished car 2 with the 90* mounted shorty and center mounted servo and electronics just in front of the motor. I posted a couple pictures of the proposed layout a couple pages back. I still have to paint the body. A shorty will fit in line with the servo mounted this way. A mini servo like a 9650 would make even more room. I'll give a running report after I try it Saturday.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
Problem: Car 2 has a weird issue when rolling the rear drive line without a load on it. It's rolls smooth to a point, then feels like it goes over a hump, then rolls free the rest of the way around. I marked the wheel and it always happens in the same spot. I'm wondering if it's just a bad diff bearing out of the box. When I put a pinion on and let run it at low RPMs the driveline doesn't visually look out of round at the diff and nothing is wobbling or appear warped. I loosened the whole rear end up then snugged it gently back down and the problem followed. I do have a set of spare bearings, but haven't tried those yet. The old bearing spins free when it's not installed. I checked all the gear gaps to insure that wasn't the problem either. I'm afraid if I put the diff back another notch looser it might strip, but that would be the next step.
02-29-2012, 10:40 AM
#1731
As Mentioned by Troy a few post back the McKune Design Carbon Fiber Conversion Kit for the FGX is being released this week, Great to see Troy made the push to get them our before the Nat's and we have a few from the first batch online and available for pre-order at Timezonehobbies.com
http://www.timezonehobbies.com/store...roducts_id=760
http://www.timezonehobbies.com/store...roducts_id=760
02-29-2012, 12:01 PM
#1733
Tech Master
No problem That's what we are here for. Just wish we all lived closer together so we could race a little.
02-29-2012, 01:38 PM
#1736
TP 21.5 - Stock timing is fine, the can is labeled 20* where mine are pointing right out of the box. Gearing from 26 to 30 tooth pinions keeps the heat down with the 35 tooth spur installed and gives great acceleration. Anything higher than a 32 pinion showed no signs of better top speed, just more heat. Punch never really changed all the way up to a 36 tooth pinion, but the 210* temp after 10 min. scared the hell out of me. This a very torqy and resilient motor. I have the TP 21.5 in both of mine and the big thing is in this chassis is ventilation in the body. Open up the airbox for sure. Side pods don't impact the motor heat much. I'm thinking about making a small flap just in front of the motor to deflect more air directly over the motor. The airbox alone is good for 15* of cooling.
02-29-2012, 03:21 PM
#1737
Tech Master
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02-29-2012, 07:30 PM
#1738
Tech Master
Yeah and with the cost of gas makes it even harder. Thank God our cars are electric. I can't afford to run my gas toys. 
8 miles per gallon on 93 octane keeps them parked.
Maybe it would be fun to organize a semi regional meeting maybe in Kentucky? All the south east and mid west guys could get together for a fun race. I think we need to look into this once its affordable to travel maybe next winter during the off season.
8 miles per gallon on 93 octane keeps them parked.Maybe it would be fun to organize a semi regional meeting maybe in Kentucky? All the south east and mid west guys could get together for a fun race. I think we need to look into this once its affordable to travel maybe next winter during the off season.
02-29-2012, 07:34 PM
#1739
Tech Master
I'm running a 3.05 and it works pretty well. Full timing on a reedy sonic. Temps have been 140 to 150. I'm about to experiment with a larger pinion and possibly backing off of the timing. Torque is good but I'm still searching for the proper balance between the motor timing gearing and esc settings.
02-29-2012, 07:35 PM
#1740
Tech Master