griceiv

iTrader: (2)

yes, that is exactly what I mean. I've seen (and run) shocks with way too much low speed valving capability which tends to result in either running the shocks way too stiff or so open you don't have any lowspeed damping. both of which result in hopping.

Dallas J

iTrader: (1)

Interesting, I didn't know Guy Ankeny was at FRSport now. Also interesting that you guys switched from the Flags since I know you've done quite a bit of valving work there.

I see what you're saying about the valving, definitely seems like its getting in the trickery to make it work with excessive spring rates though. Certainly beyond my ability to dial in.

I do think its sorta funny that everyone eventually gets to the point of hopping if they go far enough. Seems only a handful seem to find a way around it. Its definitely a pain in the butt when its happening though.

kyoo

iTrader: (29)

could it at all be too much spring preload in the rear? spring won't then work until it's got weight beyond the preload x spring on it

griceiv

iTrader: (2)

I don't run any preload on the springs (front or rear).

griceiv

iTrader: (2)

well the good news is FRSport has the 'trickery' already figured out, you just buy the shocks from them valved the same as ours and bolt them up.

kyoo

iTrader: (29)

i thought you didn't have any hopping issues though -

griceiv

iTrader: (2)

I wish! I've fought with the hopping for years. the whole time with zero spring preload.

RJones

iTrader: (5)

Yeah that's the one, recirculated of course.

Wanted EVO IX

Great topic by the way! I have the hopping issue but like others mentioned above I was running near full stiff up front and close to full stiff in the rear. I got some local guy advise to back out to a softer setting and for the most part it went away.. I see some of you guys run a complete different setup than me. One thing I need to try is to run softer settings on the autocross courses.

Jim3142

iTrader: (2)

I would probably drop down to 600/900 with the same bars that I have right now (stock front, WL 26 RSB), currently not maxing out the rear rebound (gets too loose in slaloms for my taste when I used to crank it up to 2-3 clicks from full stiff). The math says the roll rates would be more biased to the rear than they are now, though it would be softer all around. And yep, that's the downpipe (actually bought it off RJones ).


I'm running around the middle/stiffer side of things in terms of rebound on my shocks, will give softer settings a try this weekend to see how the car behaves.


Yeah, going to try some things before I swap springs (cheaper that way :P) to reduce/eliminate the hopping. Last event of the year at Crows Landing so I'm hoping to make some headway on this


On the same note, I did Evo School Phase 1 this past weekend at Auto Club Speedway on the infield lot (Lot 7 I think) - car didn't hop, wondering if surface/grip levels are a variable in the hopping? I was also on some old (early 2016 build date) 265 RE71Rs. Also, highly recommend Phase 1 for anyone who's been on the fence about doing it

Jim3142

iTrader: (2)

Update time!


So after my last post, I ended up lowering the rear ride height a bit to get rid of the spring preload I had (forgot about this until I took time to look at it, added preload when I put these coilovers on because I thought it was too low in the rear at the time). This is what it looked like on course:


Yeah, almost the opposite of what it felt like 2 weeks before

I didn't know what was up with the car until about 2 weeks ago when I was working on the car....one of the bolts on my rear endlinks had come out so I was effectively running with no rear bar


During that time, I put on softer springs (600f/900r) and got the car realigned with a bit more negative camber in the rear (-1.7*) for the last event of the year (watch the outtakes):


Yeah, not exactly how I planned it would work out

After my first run, my friend Ben came up to me and said that the car wasn't picking up the inside rear wheel on right-handed sweepers but would pick it up a bunch in left-handed sweepers. I watched my co-driver's next 2 runs and it confirmed what he saw, plus it confirmed what I felt driving the car: it was very good at rotating when turning left, almost too loose (as you can see in the video), but was pushy when turning right. Not sure what the cause is, may be something I goofed when putting everything back together. Before I put things back together, I noticed the front left strut was leaking (front right leaked at Nats), decided to throw it back together anyways for the last event and just send it out afterwards since there's a 6 week break until next season.

kyoo

iTrader: (29)

hope you figure that out.

6 week break until next season. you poor thing

MrAWD

I would check sway bar pre-load first for the difference between left and right sweepers. If you have none, spring rates might be different regardless what is printed on them. Shock settings might affect this if nothing else works. Other than this, something is bent!

Good luck!

Dallas J

iTrader: (1)

Basically told him the same thing last night

Jim3142

iTrader: (2)

What will I do in the meantime....


Good call, will add those on the list. Thanks


We have it pretty good here