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11-10-2016 | 01:42 PM
Tech Adept
Joined: Mar 2016
Posts: 122
Thanks
There are several ways to reduce on-power understeer, as other RCTechies have mentioned. I'll address one that is not usually given: lowering the center of gravity (CG) as much as possible. Keep the ride height as low permissible, and the radio components and wiring as low possible. Another possibility, depending on the car, is to lengthen the wheelbase. I have had good luck running my XTi in the long/long (chassis/motor pod) configuration, which reduces weight transfer under acceleration just like a lower CG does.
The nice thing about lowering the CG and/or lengthening the wheelbase is that it also makes the car less "pointy" on turn-in, which is great for those of us whose reflexes have slowed over the years.
The nice thing about lowering the CG and/or lengthening the wheelbase is that it also makes the car less "pointy" on turn-in, which is great for those of us whose reflexes have slowed over the years.
11-10-2016 | 08:09 PM
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Joined: Aug 2016
Posts: 111
My opinion is Spec Tires are the way to go, but, I'm only trying to set up for big races.
11-10-2016 | 08:40 PM
Tech Adept
Joined: Mar 2016
Posts: 122
Spec tire
I have tried the specs and they dont work to well,seems ok for bout 4 mins then they start to lose grip for the track I race on.If I was on the black carpet then ya,specs for me.Gonna stiffen the car and see what it does.Thanks for the help
11-10-2016 | 09:58 PM
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Been using the spec tires in 17.5 on the old grey carpet, no traction issues for me or the other top drivers. You do need to change your set up for them though wasn't too hard in my opinion and once close fine tuning was easy to me.
11-11-2016 | 04:52 AM
Will moving the rear axle back and forth have a similar effect as moving the rear hubs back and forth on a 2wd buggy? Hubs forward, the car will square up more and have more forward bite, back and the car will carry more speed.
11-11-2016 | 06:45 AM
Tech Adept
Joined: Mar 2016
Posts: 122
Specs
Hi Scirocco,how did u set the car up for the spec tires?,I really never gave them a chance,all the top drivers said to run the green and dblue combo so I just stuck with them,thanks for the input,I have an idea what u did.Did u go softer all around on the springs rates?Thanks for the help
11-11-2016 | 08:22 AM
On Pan cars you can't move the rear axle forward or back, it's fixed in one position. You can only move the rear axle up or down to adjust the ride and height and moving the rear hubs out or inwards to decrease or increase the width.
11-11-2016 | 08:25 AM
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From: Myrtle Beach SC
Not completely true. On the reflex car you can shim the axle carriers to move the axle out as much as you want. Same with the Roche p12. They offer different offset carriers to move the axle up to 2mm front to back
11-11-2016 | 09:00 AM
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From: Bondurant, IA
11-11-2016 | 09:04 AM
Tech Adept
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From: Myrtle Beach SC
11-11-2016 | 11:51 AM
Tech Master
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From: Spokane, WA
Hi Scirocco,how did u set the car up for the spec tires?,I really never gave them a chance,all the top drivers said to run the green and dblue combo so I just stuck with them,thanks for the input,I have an idea what u did.Did u go softer all around on the springs rates?Thanks for the help
Blu/2x Blu
Blu/Blu
Greene/Blu<-- This was always my preference before we spec'd purple stripes.
As Scirocco pointed out, we have figured out minor tweaks to get our purple stripe tires to hookup very well on the old gray carpet. The only real tweaks I made to my CRC XTi WC were to soften the front springs to .45mm from .50mm and went to the stiffest rear spring and bump the oil to 35 weight. I also run my front and rear tire diameters the same and run an even ride height front to rear.