914-6 GT fast road/track suspension settings |
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914-6 GT fast road/track suspension settings |
amallagh |
Aug 3 2007, 05:34 PM
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#21
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Member Group: Members Posts: 103 Joined: 4-September 06 From: Cheshire, England Member No.: 6,767 |
Hi,
I'm just about to have the suspension set up on my 914-6 GT project and wanted to see if anyone had any advice. I have never done this before (my first 914) and was looking for a fast road/track set up. I think the range of settings people seem to talk about on Toe and Caster is fairly small but camber settings vary wildly depending on what people want to do and type of tyres. I know the theory about track set up and measuring temperatures across the width of the tyre but this car will spend more time on the road than track (albeit I could be called a spirited road driver!), and tracktime ain't cheap ! Suspension components are :- FRONT - Sway-a-way 22mm hollow torsion bars Weltmeister 22mm sway bar Bilstein shocks Weltmeister camber plates Fuchs 7X15s with Goodyear Eagle GSD3 205/50s REAR - Weltmeister 140lb springs or 180lb springs available - need to decide which ones are best to use ? Weltmeister 16mm sway bar Koni adjustable shocks (yellow) Stable Energies rear strut tower camber brace. Weltmeister chassis and suspension arm stiffening kits Fuchs 8X15s with Goodyear Eagle GSD3 225/50s Tyres will be This is what I was planning to do based on some previous indications:- FRONT - Toe in(each wheel)- 10' Camber- 1 degree negative Caster- 6 degrees REAR - Toe in(each wheel)- 15' Camber- 1.5 degrees negative ############################################# I think these are the factory settings - FRONT - Toe in(combined) 20' +/-10' Camber- 0 degrees +/-20' Caster- 6 degrees +/-30' REAR - Toe in(each wheel) - 0 degrees +15' Camber- 30' +/-20' negative ############################################## I would welcome any advice or opinions. If anyone has any advice on initial settings for the rear Koni shocks then that would be a real bonus. All advice gratefully received and without prejudice. Andrew |
J P Stein |
Aug 4 2007, 09:01 AM
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#22
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Your alignment seems OK for a start tho if you have rubber rear bushings, you may need more rear toe in for braking stability on the track.
Your choice of 22 mm Tbars makes an out of balance condition with your choice of rear springs (IMO). I would think that 200lb rear springs at minimum would get you closer. If you don't have threaded collars for your rear shocks, I would get some. The stiffest rear springs I could find using the stock perches were 200lb and they were twice as expensive as those that go with the threaded perches (2.5in dia). You need the stiff springs to help keep the inside rear tire on the ground. Weltmeister rear springs are progressive and these are fine for the street, but suck for the track. Spring rates that change= handling that changes....not good in mid corner. The rear anti roll bar exacerabates the inside rear lifting....something to be avoided at all costs. On my car, for instance, I run 21mm Tbars with 275 or 300 lb rears with no rear AR bar. I've never ran Konis so I can't offer any advice there. |
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