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Old 11-06-2009, 09:56 AM   #1
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Default what cause carpet setup doesn't work on asphalt?

I am trying to figure out how to setup my car on asphalt track. My car runs good on carpet track but when its on asphalt, it just behaves differently. Lets put various settings aside and just think about the traction level between two tracks, would you say the asphalt track has less bite so changing setup is needed? or it has higher bite than carpet? Don't go too extreme, assume everything is the same, just different surfaces.
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Old 11-06-2009, 10:02 AM   #2
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Asphalt usually has less grip, and usually has more bumps. Usually, but not always - it depends on the track and the conditions.

You need to do your own testing, but probably a slightly softer setup is the way to go, with slightly higher ride height if the bumps are a problem.
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Old 11-06-2009, 10:16 AM   #3
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Old 11-06-2009, 10:55 AM   #4
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Asphalt normally has less grip and you normally run harder tires (you know, to keep them from burning up so quick).

Since the grip is less, your car rolls less. So basically to get your car to feel like the carpet setup you need to get it to roll the same as if you had the same traction.

RC setups are nothing but getting the car to feel the way you like on the surface you run on.
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Old 11-06-2009, 11:44 AM   #5
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Thanks for you guys responses. Since its been proved that the asphalt has less grip, it is not hard to physically understand why softer springs are used. I heard longer droop will help, one guy told me he just increased droop to 5mm for both front and rear, no changes on other setup, his car was dialed. Is there any setup people can use if they want run from carpet to asphalt?
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Old 11-06-2009, 12:11 PM   #6
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Originally Posted by 05forfun View Post
Thanks for you guys responses. Since its been proved that the asphalt has less grip, it is not hard to physically understand why softer springs are used. I heard longer droop will help, one guy told me he just increased droop to 5mm for both front and rear, no changes on other setup, his car was dialed. Is there any setup people can use if they want run from carpet to asphalt?
There will be no blanket setup, asphalt can vary in traction by a huge margin, and this even changes with heat on the same day. Typically, softer spring, maybe a little flex if your chassis has a way to adjust it, softer sway bars, more droop, narrower stance would all be things to adjust in small increments until the car behaves.
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Old 11-06-2009, 01:54 PM   #7
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I know diff also plays an important role. As I know most of people run one way or spool on asphalt, is one better than the other? If I want to keep using front diff, what major change should I have?
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Old 11-06-2009, 02:48 PM   #8
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I know diff also plays an important role. As I know most of people run one way or spool on asphalt, is one better than the other? If I want to keep using front diff, what major change should I have?
Less ackermann, as the diff will also help you gain on power steering.

Also, if you do decide to go with another axle, have a look at the track you'll be running on. If it's very fast with smooth flowing corners, get the front one-way. If the track consists of a lot of hairpins and braking, get the spool. With your Cyclone you have listed in your signature I'm pretty sure they have a one-way that with some pins that you insert, can be turned into a spool.
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Old 11-06-2009, 05:53 PM   #9
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Originally Posted by 05forfun View Post
Thanks for you guys responses. Since its been proved that the asphalt has less grip, it is not hard to physically understand why softer springs are used. I heard longer droop will help, one guy told me he just increased droop to 5mm for both front and rear, no changes on other setup, his car was dialed. Is there any setup people can use if they want run from carpet to asphalt?
Ni hao. There's alot more than droop involved. I was only trying to find a similar setup between the two to avoid making big changes each week. I haven't been too lucky with that. I did change the droop, springs, rear toe, roll centers, shock angles, and camber. Hope to see you there this weekend and we'll get your setup right.
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