LF Spring Theory

[gotdirt]

So last week I had a 500 on the left front... We won the feature, but the car was tight on corner exit on the gas as soon as I would pick up the throttle...Sometimes I would drag the brake off the corner to keep the nose of the car down till I could drive the push out. I have always thought that a softer LF spring loosens the car off the corner and of course stiffer LF tightens off. So this weekend all I did was soften the LF to a 450. Everything else the same...Same track conditions...The car had a terrible throttle push all night. 10 times worse than the week we won?? It was undrivable. I could enter the corner perfect, have the car turned to come off, but as soon as I would pick up the throttle the car would take off to the wall...Should have changed it back, but I didn't. So my question is...Did I go the wrong way with this spring?

[CCHIEF]

Something else is going on. LF spring has little to no effect on corner exit handling.

[rakracing]

lf effects getting in a lot ,not much on exit ,may have let it get off the rf a little sooner try tying down the rf a bit more if its good in and thru the middle.

[a25rjr]

You have increased the dynamic wedge with the softer spring, esp if your lf is staying tied down.

[MBR Performance]

The more you soften the LF the more you will tighten exit. The days of saying it doesn't really effect exit are gone.

[fastford]

MBR is correct, what right front set up are you on?

[gotdirt]

MBR is correct, what right front set up are you on?

375 spring....100lb compression...rebound tied down all I can...800lbs

[Kromulous]

MBR, if it tightens exit, what does it affect on entry?

[MBR Performance]

It will free your entry. However it has another effect that the closer you match the front springs the better the car will turn in on its own. I like to keep dropping the LF spring until it makes the car to free on entry then step it back up 25lbs.

[Kromulous]

Thanks, looking for more adjustments in the slick than the usual.

Will give this a try.

[CCHIEF]

With that logic a 525-550 LF spring will help eliminate your throttle push! 50# less LF spring is not going to turn your racecar into a dump truck. Way Too little info to give any kind of responsible recommendation. I'd bet the track had more moisture in it, that tends to make these cars a tick (sarcasm) tighter.

[MBR Performance]

He was already throttle tight the weekend before and lowered the LF spring even more so yes 50 pound would make it worse and possibly make it drive like a dump truck

[CCHIEF]

The LF spring is not the go to adjustment for a tight car on exit. Give up what you got car, set,track and tires. Their is so much dynamic wedge in these cars when hiked up that 50# of spring... on the least loaded corner of the car (on exit) is not where you want to be adjusting FOR EXIT! Bringing the LR bars closer together @ frame would be a much more viable adjustment.

[MBR Performance]

Bad idea to move the bars

[CCHIEF]

Yes, you are right, a heavier LF spring is the go to adjustment for tight on the gas. (sarcasm)