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Kinematic toe adjustment

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Old 08-12-2014, 08:27 PM
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993inNC
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Originally Posted by Steve Weiner-Rennsport Systems
Go see Gordon @ Autometrics in Charleston and he can do a very good alignment on 993's.
Thanks Steve, may have to set that up one day. He'll be a good 3.5 hour ride for me. Car could use a good road trip though
Old 08-12-2014, 09:31 PM
  #17  
Steve Weiner-Rennsport Systems
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Originally Posted by 993inNC
Thanks Steve, may have to set that up one day. He'll be a good 3.5 hour ride for me. Car could use a good road trip though
Yessir! Good excuse to give it the "Italian tuneup". Make the trip worthwhile by adding some good fuel additives before you leave home as you'll notice the difference on the trip back.

(LubroMoly Jectron & Ventil Sauber are very good)
Old 08-14-2014, 12:51 AM
  #18  
MarkD
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Originally Posted by OverBoosted28
Modesto area. I would need to be at the shop first thing and wait for the work to be done. So gotta find someone skilled, accommodating and cheap :-)
Roger Kraus Racing in Castro Valley
They have the KT tool and experience in setting up 993s
Old 08-14-2014, 01:31 AM
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IainM
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I've been looking into this also as I see it in my future soon. I think Bill nailed it.

My understanding from shop manual and thread research is you set the kinematic eccentric C to 1/2way (12 or 6oclock depending on your perspective), then adjust height, balance, toe, camber as Bill says and then adjust Kinematic eccentric C.

From what I read, seems when you lower, you have a hard time getting the camber right. Would a better strategy be to preload the Kinematic one way (mirrored each side) and then adjust so you get different Kinematic adjust range with better camber adjust?

I concur with Piranha, Dave Graff at Borelli Motorsports knows his stuff and I'll be using him for upcoming re-alignment. He adjusts 993 kinematic using a bump steer technique which just made perfect sense. That's really what kinematic is right? bump steer for the rear?
Old 08-14-2014, 01:35 AM
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IainM
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BTW Steve - thanks for the tips on the additives, I'll try them. As for the "Italian tune up": there are 4 opportunities for this on my commute and I usually get to enjoy one. Is it OK to do an "Italian" every day?
Old 08-14-2014, 02:09 AM
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OverBoosted28
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Thanks Mark and Piranha, I spoke with Brandon Kraus and will most likely get her up there next week sometime.

IanM, this is why I really need help getting this correct. I fabbed these arms and made these eccentric locks. So even though I tried to set the length of it the same (end/end center/center) as the original, I am sure they're totally wacked. Once it's done correctly, I will take exact measurements (as close as humanly possible in my garage (-: ) so I sorta have an index in the event I have to tear something apart.
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Old 08-14-2014, 10:31 AM
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Bill Verburg
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Originally Posted by OverBoosted28
Thanks Mark and Piranha, I spoke with Brandon Kraus and will most likely get her up there next week sometime.

IanM, this is why I really need help getting this correct. I fabbed these arms and made these eccentric locks. So even though I tried to set the length of it the same (end/end center/center) as the original, I am sure they're totally wacked. Once it's done correctly, I will take exact measurements (as close as humanly possible in my garage (-: ) so I sorta have an index in the event I have to tear something apart.
Attachment 861245
I'd strongly recommend adding RSR A-arms, and using mono-***** of the front A-arms, it's amazing what removing those last bits of rubber does for the cars handling
Old 08-14-2014, 04:58 PM
  #23  
pp000830
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It seems to me the kinematic rear toe is a function of the height of the vehicle. If one adjusts the vehicle height to the same level as when the toe was last adjusted is there any reason to readjust the it? Porsche eliminated this adjustment on later cars that share the same basic layout which suggests the rear end geometry can be adequately adjusted without this setting.

Your thoughts?
Andy
Old 08-14-2014, 07:04 PM
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Steve Weiner-Rennsport Systems
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Originally Posted by IainM
Is it OK to do an "Italian" every day?
Indeed, as long as you don't see the Carabinieri in the mirrors.
Old 08-18-2014, 04:46 PM
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944CS
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If anyone needs, I have the Autometrics tool that I can rent out
Old 08-18-2014, 05:45 PM
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OverBoosted28
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Originally Posted by Steve Weiner-Rennsport Systems
Indeed, as long as you don't see the Carabinieri in the mirrors.
Is this close enough to an "Italian tune-up"? :-)

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Old 08-20-2014, 09:06 PM
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Finally got it dialed and pretty happy with the results. I'm sure if I followed Bill V's advise and removed the last synthetic bits, it'd just get that much better. But that'll have to wait for funding. Although I kept it a little conservative, the change in handling is immense. Can't wait to put it to proper use.
Thanks all for input, ideas and assistance.

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