Xidas rubbing on FUCA! HELP!
#122
I'm concerned.
I have an MSM (NB2), ELBJs and Xidas, hasn't seen track work, but is driven daily and probably have about 5k KM (~3k Miles). I'm only at -2* camber in front. I'll be checking my **** tomorrow. I did put in new control arms (with SADFab retrofix kit) at the same times as the ELBJs, not sure if they were NB2 arms though.
I'll report back.
I have an MSM (NB2), ELBJs and Xidas, hasn't seen track work, but is driven daily and probably have about 5k KM (~3k Miles). I'm only at -2* camber in front. I'll be checking my **** tomorrow. I did put in new control arms (with SADFab retrofix kit) at the same times as the ELBJs, not sure if they were NB2 arms though.
I'll report back.
FWIW, I don't hold Supermiata responsible, a warning would be nice on the ELBJs but it is what it is. A big thanks to MiataMan00 for bringing it up, sucks about the damage though.
Any opinions on what the affect of adding a spacer to the top of the shock would be on this FUCA clearance would be? I'm sick of impacting the fender liner on bumps so I'm thinking of adding a spacer on top so I gain a little wheel well clearance, but if this moves the shock closer to the FUCA it's not a good solution.
#124
Any opinions on what the affect of adding a spacer to the top of the shock would be on this FUCA clearance would be? I'm sick of impacting the fender liner on bumps so I'm thinking of adding a spacer on top so I gain a little wheel well clearance, but if this moves the shock closer to the FUCA it's not a good solution.
#129
Nope. Other than a few Exocet owners deleting the require Exomotive shock spacers and having multiple problems (broken ball joints/tires rubbing chassis, messed up handling/ FUCA-shock interference). Deleting the Exomotive shock spacers allows the F & R suspension to compress about 2" further than it does on a Miata which as you might imagine, creates all sorts of problems.
#132
I've been following this thread with some trepidation, since my MSM has all of the bogeys (NB2 A-arms, Xidas, ELBJs). It also inadvertently sports offset FUCA bushings (see this post in my I give up thread for why). Anyway, I breathed a sigh of relief, as there is no sign of rubbing at all. The car has seen many, many sessions at our local track plus the last Miatas @ MRLS event.
Passenger side:
Driver side:
This picture's out of focus, but there appears to be less clearance on the driver side. Car-to-car (or side-to-side) variation, I guess.
As another data point, nothing happened with just the offset bushings and much lower ride height (which was how I took delivery of the car).
Passenger side:
Driver side:
This picture's out of focus, but there appears to be less clearance on the driver side. Car-to-car (or side-to-side) variation, I guess.
As another data point, nothing happened with just the offset bushings and much lower ride height (which was how I took delivery of the car).
#136
ELBJ, NB2 Sub Frame, 3.5 Camber, 6.5 Castor....No issues.
Sorry to hear about your luck there MiataMan but expecting the Supermiata to eat it is unreasonable. There are limits to the RD process. Expecting them to test all possible variables is not something I would expect either. It does seem this ELBJ potential problem are slowly coming to light. You just happen to be at the tip of the spear. Tough luck indeed but not that big of a deal. Have you looked into rebuilding them? The bodies should be available separately.
Why would you even run a ELBJ? Achieving 3 degrees negative camber is possible without them. Running such little camber with them creates a LOT of castor too. Clearly not the best combination of parts for your needs.
With regards to bump stops I respectfully disagree with your expectations. The Xidas as shipped serve as a solid foundation for any track Miata. Shimming (packers)or trimming bumpstops is to be expected during testing/setup. We found the fastest times to be when light tire rub happens but does not slow down the corner speed. With all the variables (tires, alignment, track, weight and driving style etc) it would be impossible to nail down a one size fits all solution. Bumpstops are just compressible progressive rate springs after all.
Sorry to hear about your luck there MiataMan but expecting the Supermiata to eat it is unreasonable. There are limits to the RD process. Expecting them to test all possible variables is not something I would expect either. It does seem this ELBJ potential problem are slowly coming to light. You just happen to be at the tip of the spear. Tough luck indeed but not that big of a deal. Have you looked into rebuilding them? The bodies should be available separately.
Why would you even run a ELBJ? Achieving 3 degrees negative camber is possible without them. Running such little camber with them creates a LOT of castor too. Clearly not the best combination of parts for your needs.
With regards to bump stops I respectfully disagree with your expectations. The Xidas as shipped serve as a solid foundation for any track Miata. Shimming (packers)or trimming bumpstops is to be expected during testing/setup. We found the fastest times to be when light tire rub happens but does not slow down the corner speed. With all the variables (tires, alignment, track, weight and driving style etc) it would be impossible to nail down a one size fits all solution. Bumpstops are just compressible progressive rate springs after all.
Last edited by k24madness; 07-21-2018 at 03:16 PM.
#138
I really do like the xidas. That are VERY good for the money. Props to Emilio and the 949/Supermiata team for developing a great product. I understand that to get the 11/10ths out of a product will take some fine tuning to really hone in the performance. My only issue is the seemingly chosen non-discloser of potential issues. E seemed to have known about the shock body rubbing on the FUCA with min. alignment settings due to previous comments; but then said that it was not on his radar, so idk.
#139
I wasn't able to achieve camber targets without them.
agree
I did not expect to do this as a novice. There should have been a PSA on the site that says packing the bump stops may be required. If the tire wants to travel 1/2" through the fender I really cant help but imagine that it will slow the car down. This is speculation, I dont have data to back any of this up. I would also like to see data of shimmed bump stops (A/B test) being slower.
agree
I did not expect to do this as a novice. There should have been a PSA on the site that says packing the bump stops may be required. If the tire wants to travel 1/2" through the fender I really cant help but imagine that it will slow the car down. This is speculation, I dont have data to back any of this up. I would also like to see data of shimmed bump stops (A/B test) being slower.
Here lies the problem, your novice expectations need to be calibrated, not the product(s). You drive a heavy street car on a track (Laguna) that loads the suspension in a very unique way. Think those that drive VIR in a lightweight Miata will experience the same problems? How about those with heavy or lighter springs? As I said before your expectations are unreasonable. The solutions are simple and expected (by measure of a reasonable man with reasonable talents).
I really do like the xidas. That are VERY good for the money. Props to Emilio and the 949/Supermiata team for developing a great product. I understand that to get the 11/10ths out of a product will take some fine tuning to really hone in the performance. My only issue is the seemingly chosen non-discloser of potential issues. E seemed to have known about the shock body rubbing on the FUCA with min. alignment settings due to previous comments; but then said that it was not on his radar, so idk.
Last edited by k24madness; 07-22-2018 at 05:20 PM.
#140
Junior Member
Join Date: Dec 2015
Location: Brisbane, Queensland, Australia
Posts: 222
Total Cats: 73
Nb2 arms with gussets, 4 degrees camber, 4.5” pinchwelds, ELBJ’s sub 60 TW tyres, , stock ARBs, newish stock Mazda control arm bushes, no contact.
A careful look at mine, indicates there is not much room available for bushing deflection before contact would be possible. If all of the control arm bushes were just a little worn, coupled with other flex or imperfections in the subframe and body, it might be enough to get the shock body quite close to the upper arm. I know my car is not perfectly uniform in it’s dimensions.
A careful look at mine, indicates there is not much room available for bushing deflection before contact would be possible. If all of the control arm bushes were just a little worn, coupled with other flex or imperfections in the subframe and body, it might be enough to get the shock body quite close to the upper arm. I know my car is not perfectly uniform in it’s dimensions.