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Old 12-05-2005, 11:38 AM   #1
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Default Increasing cornering speed?

I'm currently racing an HPI Pro 4 on a carpet track. The track is about 65' x 35' (I don't know if that's small or big). I like the way my car handles and feels. It rotates nice, stays planted, doesn't push and doesn't get loose. It's pretty quick, but I feel that I could use just a little more speed in the corners. What kind of changes should I look to make so that I can keep a little more speed in the turns?

-Frank
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Old 12-05-2005, 12:01 PM   #2
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Quote:
Originally Posted by FrankW
I'm currently racing an HPI Pro 4 on a carpet track. The track is about 65' x 35' (I don't know if that's small or big). I like the way my car handles and feels. It rotates nice, stays planted, doesn't push and doesn't get loose. It's pretty quick, but I feel that I could use just a little more speed in the corners. What kind of changes should I look to make so that I can keep a little more speed in the turns?

-Frank
Maybe the BMI chassis. Try different traction compounds and tire compounds. Different bodies. Ride height changes. And try to stay on the throttle as much as you can w/o traction rolling or over shooting the turns.
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Old 12-05-2005, 12:03 PM   #3
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You could make the rear of the car harder eg thicker shock oils, harder springs.

Charles
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Old 12-05-2005, 12:20 PM   #4
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Can't change tires (spec tires) and only one type of traction allowed on the track (TQ from Racer's choice). I'm already at the lowest ride height allowed 5mm. I almost never let off the throttle more than half way. I could try a different body though. Currently I'm running a Proline Chrysler 300M, I have a Carpet Startus and Pontiac G6 on hand.

I'm wary about stiffening up the rear because I don't want to change the balance of the car.

-Frank
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Old 12-05-2005, 12:28 PM   #5
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If you want more corner speed i think you'll have to try and make it 'less stable' at the rear to get it to turn quicker . It doesn't take long to get used to a car with more steering . If you don't like it you can always change back to your original setting(s) . But you say that you've got a body or two to try so why not try them (mazda6 is an agressive shell which gives lots of steering)

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Old 12-05-2005, 12:36 PM   #6
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I already have more than enough steering than I need and I don't need it to turn "quicker". I just want to be able to hold more speed in the turns. Maybe I should try stiffer oil all the way around to reduce chassis roll? Or maybe I should just get down to the track more and practice.

I'm already in the top few of the pack, I just want more of an edge.

-Frank
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Old 12-05-2005, 12:37 PM   #7
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Do you run rubber or foams?
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Old 12-05-2005, 12:41 PM   #8
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Increase throttle EPA forward by additional 10%.

Use anti dive for front suspension arms ( front hinge pins tilted higher, back lower )
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Old 12-05-2005, 01:05 PM   #9
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try one set stiffer springs all the way around
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Old 12-05-2005, 01:09 PM   #10
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Please post your existing setup.
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Old 12-05-2005, 02:09 PM   #11
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Try setting up your car to have neutral steering (not over or under) during cornering without lifting the throttle (full throttle). If you can do that then let me know.
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Old 12-05-2005, 02:19 PM   #12
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Stiffer spring are the solution!!

Stiffer spring are good for high-traction tracks and the car feels more responsive,more direct.

Later!!
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Old 12-05-2005, 02:31 PM   #13
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Ok the lesson for the day...pay attention

90% of racers tune them selves right out of the race. Once you have your starting setup, the only thing you should have to do is change your car's rear roll center. Think about it. When you go from track to track what do you want to make your car do...either rotate more or rotate less. This should be done with Roll Center changes to the rear. Since you said you like the way your car handles then I would presume you have your setup...now you need to adjust the way the car rotates. I am not in anyway saying that you will never need to change shocks oils or spring, that would be foolish. But remember, when your setup...and trust me you will know when you have it...simplify things and only change the roll centers.

Try it...what have you got to loose but a few laps.
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Old 12-05-2005, 02:38 PM   #14
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Also make sure you aren't overdriving the car. Sometimes staying on the throttle too long or lifting too late will cause you to scrub speed in the corners. Especially when traction is good.
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Old 12-05-2005, 03:12 PM   #15
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and what about a oneway to get more cornering speed?
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