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> 914 Suspension motion ratios, Comparing notes
groot
post Nov 27 2004, 09:53 AM
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I measured my front and rear motion ratios yesterday and wanted to compare notes with any that have done the same.

For the rear suspension I took ~20 data points and did a best fit analysis to come up with 1.00 to 1.00 damper travel to wheel travel with strong statistical correlation.

My front geometry is a bit different than a standard 914, so the motion ratio should be different, too. I measure ~10 points and found 0.83 damper travel to wheel travel, again with strong statistical correlation.

I'm about to order my rear shocks and this is one of the bits of data they need to build the shocks.
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groot   914 Suspension motion ratios   Nov 27 2004, 09:53 AM
groot   And.... If anyone had determined the height of th...   Nov 27 2004, 12:10 PM
Brad Roberts   Your making me think.. :D I have all of this inf...   Nov 27 2004, 02:33 PM
slivel   Kevin, I realize that I sent the wrong numbers to ...   Nov 27 2004, 02:51 PM
Brett W   Kevin Who are you having do your shocks? Steve W...   Nov 28 2004, 10:53 AM
slivel   Kevin, Brett, I would love to compare notes with ...   Nov 28 2004, 11:21 AM
Eric_Shea   Nice to have a Brother in the shock business... :...   Nov 28 2004, 11:27 AM
Thorshammer   Kevin, What do you plan on using for shocks???? ...   Nov 28 2004, 01:08 PM
Jeroen   I just uploaded Steve's excell sheets. You can...   Nov 28 2004, 06:11 PM
Brett W   I too spent hours measuring the points for all the...   Nov 28 2004, 08:19 PM
groot   I'm going with Koni 30s in the rear. They have...   Nov 29 2004, 07:49 AM
ottox914   So how low is TOO low on the front of a stock 914?...   Nov 29 2004, 08:48 AM
groot   Angled down towards the wheel (better than paralle...   Nov 29 2004, 09:40 AM
Bigbohr     Nov 29 2004, 03:09 PM
groot   That's how I see it. I didn't increase th...   Nov 29 2004, 03:34 PM
groot   Well, I re-measured and still get 1:1 on the rear,...   Nov 30 2004, 09:51 AM
Brett W   I was told by someone I trust to figure about 16 i...   Nov 30 2004, 10:36 AM
groot   That sounds like it's in the ballpark. For re...   Nov 30 2004, 02:38 PM
Brett W   I guess the DOHC V8 moves some of the weigh a litt...   Nov 30 2004, 05:32 PM
TimT   I like this thread   Nov 30 2004, 05:36 PM
redshift   First off, all you guys have lost your lids.. :lol...   Nov 30 2004, 05:42 PM
Bigbohr   If somebody wants some info on front Mac suspensio...   Nov 30 2004, 11:24 PM
Brett W   The factory front suspension geometry moves all ov...   Nov 30 2004, 11:56 PM
groot   Here's a simple front roll center calculation ...   Dec 1 2004, 07:26 AM
smdubovsky   Interesting thread. Kevin, When I d/l your spread...   Dec 1 2004, 07:43 AM
groot   Excel for XP.... don't know why it does that. ...   Dec 1 2004, 08:00 AM
groot   And now with a simulated lowered 914....   Dec 1 2004, 08:01 AM
Jeroen   Kevin's excell sheet can be downloaded here: ...   Dec 1 2004, 08:31 AM
groot   Maybe some more explanation would help... The cha...   Dec 1 2004, 08:38 AM
Nick   I'm reading this thread and wondering if anyon...   Dec 1 2004, 09:24 AM
groot   The Carrol Smith books are a great start. From th...   Dec 1 2004, 09:38 AM
jwalters   :trophy: You know what somebody needs to do--is de...   Dec 1 2004, 09:43 AM
TimT   FWIW i just read in Paul Freres book "Porsche race...   Dec 1 2004, 09:49 AM
Brett W   Those books that Kevin listed are considered by mo...   Dec 1 2004, 10:50 AM
groot   The moveable suspension pickup points is in theory...   Dec 1 2004, 02:57 PM
smrz914   For those of us that like engineering, cars, but a...   Dec 1 2004, 11:37 PM
jwalters     Dec 2 2004, 07:43 AM
groot   Oh, I know what you're talking about now. Thos...   Dec 2 2004, 08:23 AM
slivel     Dec 2 2004, 09:26 AM
groot   Steve, I made some minor modifications...... Lin...   Dec 2 2004, 10:00 AM
groot     Dec 2 2004, 10:03 AM
slivel     Dec 2 2004, 04:03 PM
ottox914   I've been using MR SEARCH to try to find out w...   Dec 1 2005, 06:42 PM
groot   Typically a strut front suspension has a motion ra...   Dec 4 2005, 09:00 AM
ottox914   Great, exactally what we were looking for. thank...   Dec 5 2005, 07:53 PM
maf914     Dec 6 2005, 10:28 AM
groot   Longer arms reduce the camber, toe and roll center...   Dec 6 2005, 11:09 AM
Brett W   Kevin's right packaging is a big problem with ...   Dec 6 2005, 01:48 PM


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