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Old 12-07-2005, 01:18 PM   #31
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Quote:
Originally Posted by CoryCraig
Mdoc - he said the car felt fine, that it wasnt loose and didnt push, it just didnt have the corner speed he feels he should have, hence dfferent ways to try to gain corner speed.
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Old 12-07-2005, 06:16 PM   #32
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Mdoc - just because a car doesnt push and isnt loose doesnt mean it has alot of corner speed. A car can have too much grip, and bog itself down in a corner.More power wont solve that, you have to get the car free through the corners.

RockDog with the arms and camberlinks parrallel the roll center would be roughly chassis level between the arms.
Lower roll center doesnt necessarily mean freeer, it can be but isnt always.

On a carpet oval, if its possible try to raise the right side roll center and lower the left side. You can do this with a slight mod to the car ( depending on the car ). Email me at [email protected] with thetype of car and ill figure a way to do it for you.

A simplified way of getting a similar effect is to lower the camber link on the shock tower for the left side and raise it for the right side. Both front and rear.
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Old 12-07-2005, 08:51 PM   #33
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I think I'm going to start stiffening up the suspension all the way around. I may try raising the roll center of the front and back first though. I think that will allow me to keep the throttle up a little more through the turns while keeping the front/rear balance the car already has.

-Frank
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Old 12-07-2005, 08:56 PM   #34
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what do you think the car would do right now if you kept the throttle up....before you change anything ?
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Old 12-07-2005, 08:59 PM   #35
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do you guys have a link with tuning the roll center( with pics )
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Old 12-07-2005, 10:19 PM   #36
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Quote:
Originally Posted by anthony390
do you guys have a link with tuning the roll center( with pics )
Here you go-all you ever wanted to know about roll centers.

http://users.pandora.be/elvo/

Frank-reducing the rear toe may help,but it will disturb the balance and may cause other problems.
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Old 12-07-2005, 10:31 PM   #37
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WOW thats all the handling sectrets

i a gotta say thanks
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Old 12-07-2005, 10:35 PM   #38
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Quote:
Originally Posted by FrankW
I think I'm going to start stiffening up the suspension all the way around. I may try raising the roll center of the front and back first though. I think that will allow me to keep the throttle up a little more through the turns while keeping the front/rear balance the car already has.

-Frank
I would suggest keeping the roll centers the same or actually lowering them one step and then stiffen up the springs/dampening two steps.
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Old 12-09-2005, 03:29 PM   #39
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Here's a setup sheet on my current car settings: If the spot is blank, then I don't know or am not totally sure on the value. I know I have a litle front toe out, but I don't know the exact value. Thanks for the help.

-Frank
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Increasing cornering speed?-rcplus-sheet1.jpg  
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Old 12-09-2005, 03:50 PM   #40
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when i ran at the snowbirds on rubber tires in stock, a one way was a HUGE help in gaining corner speed, perhaps you should give that a try.
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Old 12-10-2005, 08:15 PM   #41
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So I went to the track to practice and work on my set-up today. I ended up going one set stiffer springs all the way around, 50 Wt. shock oil and I tried both a spool and a one way front diff.

The spool gave me the fastest lap time by .10 seconds, but it wrecked havoc on my car. The acceleration out of turns was awesome, but one of the front tires would spin in the turns, and would try to destroy my transmission. Not worth it on this track. Maybe a large track with long straits and tight turns.

The front one way was twitchy at first, but once I got used to it, and the tires warmed up it handled fine.

I can now keep the throttle on full through most of the course. Next weekend I may try going one set harder springs; the car wanted to lift the inside tires.

-Frank
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Old 12-10-2005, 09:15 PM   #42
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you can also try standing the shocks up if they arnt already. Stiffer springs will help, possibly sway bars.
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Old 12-10-2005, 09:32 PM   #43
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I saw two major flaws with your setup.

1. The body. You should be running either a Dodge Stratus Carpet version or a Mazda 6. The 300m is not a good body compared to the stratus or mazda.

2. I front one-way should be faster than your diff. You'll have to make some setup changes, but it will be faster in the long run.
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Old 12-10-2005, 09:58 PM   #44
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Actually, I like the balance the 300M has over the Stratus and Mazda 6.

I tried the one way today. I wasn't faster than with the diff, but I think with more track time that should change. The oneway doesn't have the acceleration I like, but I can hold more throttle through the turns anyways.

-Frank
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