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Author Topic:   LF spring?
supwitchew
Dirt Maniac

Total posts: 122
posted July 27, 2004 12:02 PM  
I'm trying to better learn what changes will affect different aspects of handling. If everything else remained the same, what would increasing the left front spring rate do? Let's say the RF is 1300 and the LF is 1100. Would changing the LF to 1200 have much of effect? I did a search on here and found contradicting information.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted July 27, 2004 12:28 PM  
tighten entry, no effect on exit.

supwitchew
Dirt Maniac

Total posts: 122
posted July 27, 2004 12:52 PM  
Why?

cd2
Dirt Maniac

Total posts: 161
posted July 27, 2004 07:22 PM  
supwitchew If you put the 1200 in the L.F. it will tighten the car on entry.The reason why is when you let off the gas & the weight goes foward the L.F. gets more weight with the 1200 than it did with the 1100 & this keeps some of the wedge out of the R.F.-L.R.& makes the R.R. lock down harder & tighten the car on entry.If you want to see how good a stronger L.F. will tighten on entry get you a 1400 spring.Scale the car for wheel weights & see what you need to do to keep the wheel weights the same when you change the spring.Go to the track & run some laps to see how the car is getting in .Now change the L.F.& reset your wheel weights & try the car again.Bet it will be real tight on entry.You can leave the 1100 in the L.F.& change the R.F. to a 1100 & tighten on entry also.Remember to reset wheel weights after any spring change or you will be making two changes instead of one. cd2

UFnARacing
Dirt Maniac

Total posts: 179
posted July 28, 2004 10:27 AM  
Something I think has been overlooked......a LF change will have different effects depending on a lot of things. The biggest one is track banking. When I raced on an 18 banked asphalt track and went up on the LF, it made the car looser, pretty much all around. On entry, the LF will take more weight than it used to, off the RF. This adds grip to the LF, which adds overall grip to the front of the car. On exit, a bigger LF helps transfer weight to the RR quicker, which makes the car looser. Although an argument could be made that this tightens a dirt car by decreasing right side bite.

You need to look at your LF travel to get a better idea of what effects a LF spring change will have.

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