V8R X-Lite control arms: some assembly required - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-07-2018, 01:27 PM   #1  
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Default V8R X-Lite control arms: some assembly required

I figured I would put this info out there to make the arms easier to use for those who choose to buy them, and provide some honest feedback for those considering buying.

TIP #1 (RUCA): the OEM pivot bolt does not fit at the outboard location, as the machined clevis is thicker than the OEM arm. Solution: M10 x 90mm bolt and matching M10 x 1.5 nut.

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Old 09-07-2018, 01:28 PM   #2  
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TIP #2 (RUCA): the roll center adjustment does not actually adjust roll center.

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Old 09-07-2018, 01:32 PM   #3  
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TIP #3 (RUCA): The arm hits the body much earlier than the stock arm, before the tire even makes contact. Use the not-roll-center "unibody clearance adjuster" to improve this radically. This will get you to full tire contact for most setups, and a little massaging of the contact zone on the body can make some breathing room.


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Old 09-07-2018, 01:42 PM   #4  
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TIP #4 (FUCA): The arm contacts the unibody before tire rub with 225/45R15. Contributing to this is the fact that the rod end is offset from the midplane of the arm, presumably to shift the bump/droop limits of the range of motion of the spherical bearing serving as the UBJ pivot.


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Old 09-07-2018, 01:47 PM   #5  
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that's terrible. seriously terrible
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Old 09-07-2018, 01:48 PM   #6  
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TIP #5 (FUCA): Flipping the arm (logo down) radically increases body clearance. However, it moves the UBJ spherical bearing closer to bind at full bump relative to the stock orientation. A number of solutions can be used to correct for this, including shimming the height of the spherical bearing. However, I chose to substitute a true high-misalignment spacer (a modified version of a QA1 SN12-68) and an AN-7 bolt for the stock SHCS + counterbored, lower misalignment spacer.

Note in the first photo that the head of the SHCS had to be turned to fit the top spacer.



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Old 09-07-2018, 01:55 PM   #7  
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TIP #6 (FUCA): Maybe throw some loctite retaining compound on the UBJ spherical.

Stock fit (turn headphones to max for full effect):


TIP #7 (FUCA): Also maybe get steel jam nuts to replace the aluminum jam nuts for the rod ends.
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Old 09-07-2018, 02:03 PM   #8  
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Tire clearance when turbo hits block arm hits body.

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Old 09-07-2018, 02:06 PM   #9  
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Quote:
Originally Posted by afm View Post
TIP #6 (FUCA): Maybe throw some loctite retaining compound on the UBJ spherical.
Hey afm, what flavor loctite do you recommend on that ubj spherical?
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Old 09-07-2018, 02:06 PM   #10  
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Quote:
Originally Posted by EO2K View Post
Hey afm, what flavor loctite do you recommend on that ubj spherical?
Ask your pro suspension builder.
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Old 09-07-2018, 02:10 PM   #11  
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TIP #7 (FUCA): If you use the stock hardware, make sure the SHCS head sits fully in the counterbore of the spacers. Turning the bolt heads is a fun drinking activity but maybe not a good solution.







Pictured: essential suspension installation tools.
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Old 09-07-2018, 02:17 PM   #12  
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Quote:
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Hey afm, what flavor loctite do you recommend on that ubj spherical?
Tastes kind of like lime to me.
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Old 09-07-2018, 02:35 PM   #13  
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V8R is fully refunding you fort this utter garbage . Right???!!!
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Ask your pro suspension builder.
V8R's track record speaks for others, to avoid vendor/sponsor fees
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Old 09-07-2018, 02:48 PM   #14  
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Quote:
Originally Posted by afm View Post
TIP #2 (RUCA): the roll center adjustment does not actually adjust roll center.



--Ian

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Old 09-07-2018, 02:49 PM   #15  
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Positive note: FUCA clearance like a hotdog in a hallway!

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Old 09-07-2018, 02:52 PM   #16  
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THAT MAKES EVERYTHING WORTH IT

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Old 09-07-2018, 02:52 PM   #17  
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Those aren't Xidas. I deem that irrelevant.
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Old 09-07-2018, 02:58 PM   #18  
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does it fit with extended bj's doe?

also

TIP # 69:

this is the ONLY way of communication with v8r. please do not attempt futile outdated ways like telephone and email, you have been educated


TIP # 69.5: the pigeons should all be routed to Concealer404's house, NOT Florida.
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Old 09-07-2018, 03:03 PM   #19  
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Those aren't Xidas. I deem that irrelevant.
Yeah, I think they're Racelands or something. Came free on my car.
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Old 09-07-2018, 03:08 PM   #20  
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Quote:
Originally Posted by afm View Post
Yeah, I think they're Racelands or something. Came free on my car.
I like the threads. They look nice and beefy and resistant to clogging with normal road dust/dirt.
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