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Tuning Tip - Hyper 8 Caster, Toe-In, Anti-Squat, Wheel Base

 
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TimB



Joined: 13 Jul 2006
Posts: 13
Location: Irvine, CA

PostPosted: Tue Jul 18, 2006 2:17 pm    Post subject: Tuning Tip - Hyper 8 Caster, Toe-In, Anti-Squat, Wheel Base Reply with quote

Caster Adjustment
1. Increasing caster will increase steering response entering a corner and decrease steering exiting corner. It will also increase high speed steering.
2. Decreasing caster will decrease steering response entering a corner and increase steering exiting corner. It will sometimes increase steering on slow speed corners.

Note: When you increase caster on the Hyper 8 you need to shim up the outer tie-rod link with some washers to eliminate some of the bumpsteer.

Front Toe-Out and Ackerman Adjustment
How changing the front toe-out effects the handling of the Hyper 8 can be tricky because effects also depend on what ackerman position and caster block you are using. The forward ackerman position on the steering plate will normally increase steering response. If you make an ackerman change, test buggy on track with front toe set to zero and slowly increase toe-out, testing on track each time. You will find that the steering response will increase then decrease as you pass the sweet spot. This is why you hear of so many conflicts on toe-out effects, because it depends on which side of the sweet spot you are on. Toe-out will also make the buggy track straighter. Unlike real cars, toe-in is never used on the Hyper 8. Toe-in will make the buggy wander on straight sections of the track. A good working range for each ackerman position is from zero degree to a maximum of three degree toe-out.

Rear Toe-In Adjustment
Increasing rear toe-in will decrease steering response and make the buggy feel more planted in the rear. Less toe-in in the rear will increase steering response and make the buggy feel less planted in the rear. Rear toe adjustments affect the Hyper 8 handling more on-power than off power. Meaning, when you make a big increase in rear toe-in, you will decrease on-power steering response by a lot, but only decrease off-power steering response by a little. I make rear toe-in adjustments to adjust on-power steering response.

Rear Anti-Squat Adjustment
Increasing rear anti-squat will increase on-power steering response on the Hyper 8, but will make the buggy hop on-power if the track is bumpy. You can run 3 deg. anti-squat on smooth tracks if you need to increase steering out of the corners. I use the 2 degree setting on most tracks and the one degree on very bumpy tracks.

Wheel Base Adjustment
Wheel base is lengthened by moving the rear up-right back, and shortened by moving the rear up-right forward. Moving the rear up-right forward will improve on-power rear traction. Moving the rear up-right back will improve the buggy on bumpy tracks and rhythm sections.
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