Soften fith coil up

[hunterracing]

What affects would soften fith coil up 25 to 50 lbs but keeping it same hole on the lift arm. Could gain little more traction from center off?

[MasterSbilt_Racer]

What affects would soften fith coil up 25 to 50 lbs but keeping it same hole on the lift arm. Could gain little more traction from center off?

I find loss of instant traction when I go softer on rate. If driver is a throttle masher, softer can help keep tires from shocking loose.

[hunterracing]

I’m not throttle smasher pretty easy into the gas. We’re on 325 just thought ask

[billetbirdcage]

As said

5th coil spring rate:

1. Stiffer is faster to get traction
2. Softer is slower to get traction

As said stiffer can loose traction easier, but generally you have to be a real throttle smasher to notice this and usually doesn't apply to a decent driver.


Side note* The more the 5th moves the more the rear end will shift right under throttle. The more rake in the J-bar the more this is magnified, so how noticeable it is can be somewhat dependent on J-bar to a degree.

[hunterracing]

So might be best bet to keep same rate and maybe slide it back one on rearend

[Matt49]

With the trend of trying to keep the nose down even when on the gas, I would think most folks are looking at moving the 5th coil back to change the lift point and adjusting the spring rate (stiffer) to match the throttle feel they want. This is very much a driver feel thing. But then we could get into all kinds of debate about progressive spring versus air dump stuff which are pretty much opposite approaches but you'll have people that swear by one or the other.

[hunterracing]

How bout when you tie lf up from dropping so much do you need stiffen rr to compensate so it don’t wheelie when you lower rs bars

[Kromulous]

More leftside percent, or heavy LF components?

I see a lot Touring guys run this stuff, and some struggle (Pierce). Bloomquist IMHO is all over this, and he even runs a LF tire that looks like donut (portable spare) all in an effort to get a bunch of wedge in the car so it will turn in. Then you see a bunch of the cars go way tight when the tires come in, and get hot, Richards and Bloomquist both lost races due to this.

I guess its a combo of LS percent and heavy LF components to keep the tire down.

[Matt49]

Obviously there was a trend that started a while back (and is still going) to get the RF down as much as possible and the LR up as much as possible. So if you leave those two alone and you want the LF to go down, the RR must come up to do it. I'm pretty sure there are some really stiff RR setups out there winning big races right now but I could be way off. And I don't necessarily mean just a stiff RR spring.

[hunterracing]

What bout the limiting strap on the lf keeping the aframe same angle at ride height and dyanmaic state

[a25rjr]

Obviously there was a trend that started a while back (and is still going) to get the RF down as much as possible and the LR up as much as possible. So if you leave those two alone and you want the LF to go down, the RR must come up to do it. I'm pretty sure there are some really stiff RR setups out there winning big races right now but I could be way off. And I don't necessarily mean just a stiff RR spring.

There was a certain car several years ago, that won a lot of races with the RR hiked up just like the LR! Im surprised it isn't more common!

[MasterSbilt_Racer]

There was a certain car several years ago, that won a lot of races with the RR hiked up just like the LR! Im surprised it isn't more common!

I have had success with that, but it has to hurt entry some.

[TheJet-09]

Does anyone think a shorter lift arm can be more sensitive to spring rate changes?

I've moved mine back to 33" (was at 37"), and with a 350# spring it was real responsive when the track still had some traction. But I felt like it was easily blowing the tires off in the slick, so I softened it to a 325#. After doing so, it didn't quite have the same responsiveness in the mud, but felt better in the slick.

In addition, would there be any advantage to moving the 6th coil back as well, to maintain its distance in front of the 5th coil to around 4" or so?

[fastford]

if we move the shock back and soften the spring as well , we usually increase the shocks compression to slow the reaction a bit........

[sidewinder69]

wouldnt limiting the lf droop make the lr drive harder and quicker but hurt overall steer capability?