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964 C4 light refurb

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Old 07-23-2019, 04:44 PM
  #1261  
John McM
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Originally Posted by Marine Blue
Let me know what you find out about the sharper steering. I’ve been chasing similar on my Targa and somewhat gave up with the thought that I could make a 30 yo car match a modern car. My current thought is that the steering rack could be the primary difference but I’m by no means an expert.

Considering the Spyder suspension is still very compliant I can’t imagine you need to eliminate all the bushings in the 964 suspension to get the same sharpness.
Will do. I think I will replace the inner tie rod with the FVD product and outer tie rod with lemforder. I already have new ball joints to fit. Past that I'm not sure what you can do.
Old 07-23-2019, 05:17 PM
  #1262  
911Jetta
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Originally Posted by Marine Blue
Let me know what you find out about the sharper steering. I’ve been chasing similar on my Targa and somewhat gave up with the thought that I could make a 30 yo car match a modern car. My current thought is that the steering rack could be the primary difference but I’m by no means an expert...
I'm looking to sharpen up the steering too. I'm about to install the Elephant Racing Bump Steer Kit (solid inners) and Rennline HD ball joints (from their new High Density Line of Bushings and Mounts)
http://www.rennline.com/newssection.asp?dept=1185

(Their website says: Sport durometer pieces offer an increase in stiffness of approximately 25% over factory replacements)

Already have the steering rack brace and bushings.
Old 07-23-2019, 05:49 PM
  #1263  
Marine Blue
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Originally Posted by 911Jetta
I'm looking to sharpen up the steering too. I'm about to install the Elephant Racing Bump Steer Kit (solid inners) and Rennline HD ball joints (from their new High Density Line of Bushings and Mounts)
http://www.rennline.com/newssection.asp?dept=1185

(Their website says: Sport durometer pieces offer an increase in stiffness of approximately 25% over factory replacements)

Already have the steering rack brace and bushings.
Udo definitely post back your findings after installation. I have the control arm bushings and the steering rack bushings on mine and it helped immensely. I also installed new inner OE tie rods and a new steering rack for reference.
Old 07-23-2019, 07:20 PM
  #1264  
Peteinjp
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I have wondered if the steering feel isn’t also simply a result of such a light front end. Even my 1973 bmw with stock rubber bushings (sport suspension) gives a sharper feeling. To be clear though it’s not as if the 964 doesn’t turn well- it’s just a bit vague in the in terms of feedback- though the C4 May be different.

You might try playing with the toe settings a bit. A small adjustment can be noticeable.

Pete
Old 07-29-2019, 06:20 PM
  #1265  
John McM
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I replaced the front sway bar mount bolts and decided I would complete my road trip as is to see whether it's a real issue to solve or just a factor of advances in handling between 1990 and 2010. I wonder if part of it is related to 17" versus 19" wheels?

I also decided to remove the Function First Transmission Mount stiffener to see if it reduces vibration through the gear lever. I'm not yet convinced that the mount is a source of slack in the system.
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Old 07-30-2019, 09:35 AM
  #1266  
911Jetta
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Originally Posted by John McM
...I also decided to remove the Function First Transmission Mount stiffener to see if it reduces vibration through the gear lever. I'm not yet convinced that the mount is a source of slack in the system.
Black insert? That's Function First's track mount right

From FF's website: "TRACK (80A) Black - for optimized performance on track and racecars where NVH is not a consideration"

I can definitely say their SOFT (60A) Orange version doesn't add noticeable vibration.
Old 07-30-2019, 03:43 PM
  #1267  
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Originally Posted by 911Jetta
Black insert? That's Function First's track mount right

From FF's website: "TRACK (80A) Black - for optimized performance on track and racecars where NVH is not a consideration"

I can definitely say their SOFT (60A) Orange version doesn't add noticeable vibration.
Yes, it is. My post isn’t a criticism of the product, more its suitability for my use, which is my choice.
Old 08-19-2019, 04:54 PM
  #1268  
John McM
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I checked the front suspension top mounts. One has a visible crack.
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Old 08-19-2019, 04:56 PM
  #1269  
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Luckily I have a new aftermarket spare ex Design911 and some others removed from a C2 seven years ago. I removed the struts and will get these done at a shop. They have a simple machine that will have them done in 5 minutes.
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Old 08-19-2019, 05:00 PM
  #1270  
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With the struts out I decided to renew the inner and outer tie rods plus the ball joints. I marked the eccentric bolt
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Old 08-19-2019, 05:05 PM
  #1271  
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I had the ball joints in stock and have the outer tie rods coming from Pelican. The inner tie rods have been ordered from FVD. My biggest issue now is that the old balljoints don't want to come out. I've used a pitman tool but it's a tight space. Light heat gun use didn't work either. Time to buy a better tool.
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Old 08-20-2019, 05:43 AM
  #1272  
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Some days you are the statue and some days you are the pigeon.

The visible shaft on the new ball joint measures approximately 19mm so the jaws on the pitman tool slide easily on it BUT the shaft is tapered and the point on the original ball joint where it goes into the hub measures 21.5mm so the tool can’t fit directly under the shoulder of the hub, instead it slides down the recess on the shaft. That means that the tool is not connecting correctly under the hub shoulder and I'm effectively squeezing the ball joint shaft not leveraging the shaft against the hub. I need to buy a tool with a 22mm jaw. Time for a coffee and slice of humble pie.
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Last edited by John McM; 08-20-2019 at 06:31 AM.
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Old 08-20-2019, 08:01 AM
  #1273  
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Labor of love! can't wait to see her back on the road/track I envy your wrenching skills OP! getrrrrr done!
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Old 08-21-2019, 03:22 AM
  #1274  
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I figured the ball joint spreader would not be used often so I modified the jaws to 22mm with a Dremel. One ball joint came out with little fuss. The other one came out with a bang. No damage to the hub so onwards. The pic here clearly shows the taper on the shaft.
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Old 08-27-2019, 05:12 PM
  #1275  
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FVD inner tie rods arrived. I should have realised that I wouldn't need the shaft on the outer tie rod. On the other hand I should have ordered new bellows and the spacers for larger wheels to stop wheel rub. All ready for installation.

NB: There is no discernible movement in the original tie rods and ball joints so I'm not sure if the strut top mounts were the sole issue. In fact the inner tie rods are so tight they seem to bind. If nothing else I've taken out 29 year old components and future proofed the car for a time I may no longer be inclined to DIY.
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