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Registered
Join Date: Nov 2009
Location: Kentucky
Posts: 14
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Spring Plate ?
Can the experts tell me if I have enough adjustment left in this spring plate to get at the most a 1/2" lower. Or am I in for a re-indexing.
'89 Carrera 
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02-02-2010, 05:56 PM
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Location of the cam lobe......
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Without knowing the exact location of the 'lobe' of the adjusting bolt on the spring plate, it is difficult to tell exactly how much movement the adjusting screw could make. But by looking at the present set-up, my quess is that you have 'more' upward movement available than going down. But the picture could give a different illusion. BTW, I'm no suspension expert. It just happen I played around with the spring plate adjustments very often and quite familiar with your question. Mark the present setting and adjust it CC or CCW until you get to the max and min. adjustments. Then you'll know if you need to re-index or not. That simple. Tony |
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02-02-2010, 09:21 PM
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from the pic, looks like you need to reindex.
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poof! gone |
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02-02-2010, 09:30 PM
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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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Don't know if you've ever adjusted them before, but they look like you only have upward adjustment. These Pcars came from the factory set so you only had the ability to raise the car, not lower it. You would think the spring plates would be indexed, and the adjusters set somewhere in the middle of the adjustment range from the factory, so you could move your ride height up or down as well as facilitate corner balance, but that makes too much sense.
When I owned my first '77 911 with adj spring plates, I asked the dealer about lowering it. They replied that the ride height on the USA impact bumper cars had been raised to comply with DOT regs (they looked liked Dakar rally cars), and they could lower them to Euro height, but it was not cheap, because they needed to reindex the spring plates. That's when they told me the sad story about the spring plates only being adjustable in the upward direction from the factory.
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa Last edited by uwanna; 02-03-2010 at 06:01 AM.. |
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02-03-2010, 05:59 AM
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porsher
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x2 on reindex
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86 911 Race Car, with a few 993 bits in the boiler room 79 928 Race Car 88 928 Becoming a Race Car |
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02-03-2010, 07:24 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Replace your spring plate bushings while you have it apart. They are shot since the spring plat cover is resting on the spring plate. Look at the asymmetric gap top to bottom.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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02-03-2010, 08:12 AM
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Registered
Join Date: Nov 2009
Location: Kentucky
Posts: 14
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Oh...Boy!!!
Looks like my little project is snowballing.
So to drop the car 1/2" I have to. Re-index the TB...... AND.... change the spring plate bushings.... AND.... re-center the spring plate IF..... you change ride height...THEN.... you need a corner balance and alignment. IF....your getting an alignment.....THEN.....Might as well change all bushing AND ...replace the shocks...so your ride height doesn't change. IF....your doing the rear....AND....your getting an alignment and CB for that work.... THEN....might as well proceed to the front of car....bushings...struts...ball joints....tie rods....Bump steer kit.... Did I miss anything???? Kinda looks like a FORTRAN program I wrote in college. Thanks for the input...I'm new to this site....but hope to be able to contribute at some point in the future. Boyd |
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02-03-2010, 11:30 AM
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Join Date: Jan 2010
Posts: 110
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Oh my God!!! FORTRAN!!! The done fall of my college carear. It drove me to drink (more)!!!
rford3678 85 Carrera (newbie owner) |
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02-03-2010, 11:45 AM
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Tim
Join Date: Jul 2008
Location: Antwerp, Belgium
Posts: 159
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Here's some .Net
If Spendabuck.Car.Lowered Then Console.WriteLine(Spendabuck.Wallet.Contents ) "NULL" End If 
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02-03-2010, 02:13 PM
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boyd. take a tape measure, and measure the width of that spring plate...mark a centerline. then mark center of that smaller plate behind the two huge nuts.. you will see that your car has been adjusted max, without reindexing.
$$ wise, you can take it as far as you want to go. some people have swapped side on the springplates. this essentially gets the weight of the car on the "other side" of the bushing. buys you alot of time.
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poof! gone |
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02-03-2010, 02:16 PM
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Join Date: Nov 2009
Location: Kentucky
Posts: 14
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Quote:
Fortunately I have no idea what .Net is......but I can read between the dot's 
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1989 Carrera Cab. 2007 Q7 |
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02-03-2010, 05:12 PM
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porsher
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For now reindex the plate and install new bushings. It's not so hard and you will learn a lot in the process. As for corner balancing, yes it's important but it can wait a while. If it's waaaay out you will notice one front locking up before the other when threshold braking in a straight line - often the right side.
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86 911 Race Car, with a few 993 bits in the boiler room 79 928 Race Car 88 928 Becoming a Race Car |
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02-03-2010, 06:23 PM
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