BenB
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| posted on 20/1/07 at 01:23 PM |
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Suspension setup
Without wanting to start a discussion of CEC vs BEC proportions, what's the general consensus re a good starting point for suspension setup?
At the moment (apart from front toe-in) I've got "eyeball mark 1" adjusted suspension (ie whatever it was when I first screwed it
all together) with 20Psi on all four corners... Seems to handle reasonably well but I'm not pushing it until I've set it up properly...
RWD cars are still fairly new to me (few hundred miles of quickish driving) and having driven one with OS on left corners and US on rights (with
switch over on quick L-R / R-L changes) I'm going to at least equalise the sides!!!
For SVA I'd cranked in a fair bit of toe-out but that made the car very wandering and skittish. A smidge of toe-in makes things a bit more
solid... but what about toe-in at the rear and camber?
I did ask STM when I bought the car but lost the set-up and I.G. was a bit wary of handing it over the first time (secret race setup!!!)...
I'm not looking for anything too well defined, just a good starting place- I've been searching the archives but nothing yet!!
I'm wondering about
bit of rear toe-in (so it pulls straight on power)
no camber on the rear
degree of camber on the front
Any opinions as a starting point??
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phoenix70
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| posted on 20/1/07 at 01:43 PM |
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I alway thought a little negative camber all round was a good starting point (about 1 degree)
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wilkingj
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| posted on 20/1/07 at 01:50 PM |
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If you are new to RWD cars, then take it very easy for a good while. You are far more likely to loose or spin the back end than with a FWD car.
However, thats the fun of it. You have to learn more control, and a steady / light right foot when on fast corners etc.
BEC or CEC it shouldnt make a huge difference on the Toe in / out. I would start with about 1-2 degrees toe IN I got mine parallel, then gave it a 1/2
turn inwards. However, I will get it aligned on a machine, once I have the Castor / Camber set correctly.
I am sure others will shoot me down, but it handles OK, and isnt scrubbing the tyres.
But DO take TIME to get used to the RWD car, you dont want to wrap it round a tree or worse.
EDIT:
Mine is....
1deg Negative Camber all round
small toe in
As much caster as I could get.
[Edited on 20/1/2007 by wilkingj]
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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BenB
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| posted on 20/1/07 at 02:18 PM |
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I reckon I've already had my share of fun with RWD handling whilst tagging onto the back of the convoy in the Xflow Fury I borrowed off my
brother for the Se7ens list LynchTheLeprauchaun2003 tour of Ireland... Hopefully I'm getting good at it now.... But don't worry, I'm
taking it easy  It's taken 5 years to build the car after all!!! I've got to look after it!
First time I discovered the joys of RWD I got a little slide going on a fast corner, being used to FWD I backed off... Quickly got back on it when I
realised and managed to slide the car round the corner rather spinning off into an AMG Merc and a Elise!! I think it was fear rather than skill but it
looked good!!!
Second time I was flogging it round a roundabout ie going to the 3 o'clock turning (borrowed Xflow Fury again), got half way round and
accidentally shifted from 3rd into 2nd not 4th, back end started sliding again. Slightly over-compensated and spun up the rear wheels. Managed to
pirouette with wheels a 'spinning and much smoke across both lanes of traffic on the intented turning (luckily no central reservation nor cars
coming the other way) and came to a half perfectly parallel with the pavement pointing back towards the roundabout.... Again, looked amazing, though
slightly more dangerous than #1..... Slowed down a bit for the rest of the day and I didn't bother trying to keep up with the convoy for the
rest of the tour!!!
Thanks for the advice re tracking, sounds along the lines of what I was going for!!!
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rusty nuts
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| posted on 21/1/07 at 11:06 AM |
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Put 1/2degree neg camber all round, 4 deg castor and 1mm toe in on my Luego Locost .would have put a bit more castor but had no more adjustment. HTH .
P.S. mine goes round roundabouts quicker than Geoffs (wilkinj)
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Phil. S
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| posted on 11/2/07 at 09:39 PM |
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My Westfield was recently set up at Northampton motorsport with one and a half degrees neg camber at the front and about two thirds of a degree at the
back (with me sitting in it). The front wheels are parallel and the rear has a little toe in. 18 psi all round. It was fine round Brands last Friday
"The unexamined life is not worth living" (Socrates)
"The unlived life is not worth examining" (Kopp)
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flak monkey
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| posted on 12/2/07 at 06:02 PM |
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After a quick message to Darren regarding setting my GTS up when i get home.
For normal road use:
3mm toe out at front, and 0.5-0.75 deg neg camber.
David
Sera
http://www.motosera.com
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