Rr spring rate when using soft rf

[MasterSbilt_Racer]

Assuming that's for qualifying right? Can't be good for small track that goes slick for the feature can it?

All about your rates and the timing. It can be anything you want it to be.

[bullittwrench]

I was on a 300 quite a while ago on a banked half mile. Tried a 400 for a few. Didn't have the rf technology we have now though.

[billetbirdcage]

I was on a 300 quite a while ago on a banked half mile. Tried a 400 for a few. Didn't have the rf technology we have now though.

Can't remember the year now, but it's been a while. Remember when James Ince left nascar and started building Late Models? The house car ran this for a little while:

LF 250
RF 500
LF 500
RR 500

[TheJet-09]

^^^ LR 500? I believe Ince is selling his jig/s on Racingjunk.

I assume among other changes with a heavier RR, there would at least be an accompanying change in the angle of the RRU link (lower it) to reduce birdcage indexing? It seems like the majority of the faster cars around my area don't have too much angle in their RRU link.

[billetbirdcage]

^^^ LR 500? I believe Ince is selling his jig/s on Racingjunk.

I assume among other changes with a heavier RR, there would at least be an accompanying change in the angle of the RRU link (lower it) to reduce birdcage indexing? It seems like the majority of the faster cars around my area don't have too much angle in their RRU link.

I honestly can't remember if this was before or after the LR behind, seem like is was later then 98ish but my memory sucks any more, lol.

James sold out a long time ago and think it went thru several owners since then, so no idea on if the jig is remotely anything close to what James had at the time he was running it.

[RCJ]

Would the stiff r/r be used for a slick track or would it be used all the time?When we had a 10'' spoiler and 700hp motors I experimented with stiff r/r,It had some problems but would work.I came to the conclusion that there is more than one motion ratio for a spring mounting point.I'm not good enough at typing to explain that lol.We when a different direction but a bump stop set up might solve several problems.

[Stede Bonnet]

Short answer: No. You would be shocked the RR springs some guys are running. It is more of a momentum setup.

I know you've done a lot of work on Rayburns, but I'm curious if you ever tried any of this new stuff with bumps and what not with a swing arm car... You ever run a j-bar on a swing arm? If so, what length? I'm sure you've noticed I like swing arm cars. We always had good luck with the longer pullbar over the short one.

[MasterSbilt_Racer]

I know you've done a lot of work on Rayburns, but I'm curious if you ever tried any of this new stuff with bumps and what not with a swing arm car... You ever run a j-bar on a swing arm? If so, what length? I'm sure you've noticed I like swing arm cars. We always had good luck with the longer pullbar over the short one.

No bumps on a swingarm/swingarm. Have on a car with 4 link lr/swing arm RR. Have run j bar. Don't remember length. Actually preferred running it to the right side of chassis. Got rid of a lot of the "Rayburn fade" where they start skating on slick.

[King1]

I personally don't like the big rr split with the massive rr spring. Seems like its lazy on throttle on entry and it seems skatey coming off like it wants to jump up a lane or two. Although this year I did try a 125-500 progressive rate spring from swift and it was pretty darn nice JMO. But giving the big split and large rr spring a fair chance I probably did not adjust to make those changes really work I just stuck a 300 pound spring on with a 200 LR and let it go, again it felt skatey.

[sidewinder69]

so would a stack be good idea to get the proper compression and body roll then transition into the stiffer rate for better load?