mad4x4
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| posted on 19/6/08 at 07:30 AM |
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First Real Long Run
Well it's taken 18months since the SVA. (due to work and tech probs etc)
But that is the first real long run the MK Indy has had. It was Fun.  got to do the same to get home from work tonight
Only a few setup questions for now:
1) Handles onn Rails round corners but wanders on straights so - More toe in or Less. Or worse Toe Out ??
2) Won;t self center (not even a little bit) My "mushrooms" are all the way to the front. ??
3) Suspension Over Damped - i.e. Hard, guess i'll back of the adjustable dampers for the run home.
Apart from above All is good -
roll on a
Long
HOT
INDIAN SUMMER
[Edited on 19/606/08 by mad4x4]
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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worX
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| posted on 19/6/08 at 07:47 AM |
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1. what have you got it set to at the moment regarding toe in/out?
2. Self centring is a contentious issue and it cannot be solved by the altering of the Mushroom-hole position. (If you really want to achieve
selfcentring then more fabrication is needed)
3. Wind them right off to soft and then count about 5 up for the rear and 8 up for the front and then see how you get on. Setting the suspension is
not a simple task and would be best setup professionally, but if you want to do it yourself then you have to persevere with a lot of trial & error
and miles on the road/track.
HTH
Steve
Oh and well done for your first long successful trip!
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nitram38
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| posted on 19/6/08 at 07:53 AM |
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I suspect your wandering is caused by no centering aswell. Top wishbone change is the only way to sort this out (gets popcorn)
I suggest backing off your shocks, but also bear in mind that if your springs are too soft then you may get bottoming.
You may end up changing your spring rates too if this is the case.
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mackei23b
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| posted on 19/6/08 at 09:00 AM |
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Drove mine to the SVA yesterday, 50 miles, most on the motorway and felt stable.
The initial set up I had for the SVA:
- 5 clicks fornt and rear on the shocks
- Ride Hight approx 10cm front, 13cm rear from the lowest part of the body (If the rear is lower it can lead to interesting handling I believe)
- 1 Degree negative camber front and rear
- Tyres 18 PSI
- 1 Degree tow out on the front wheels
Cheers
Ian
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nitram38
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| posted on 19/6/08 at 09:23 AM |
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Toe out is not a good idea on front wheels as your wheels will toe out normally as you drive forwards.
Most rear wheel drive cars have toe in on the fronts so that effectively the wheels straighten up when driving forwards.
You will probably get a lot of wear on the insides of your front wheels.
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mackei23b
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| posted on 19/6/08 at 10:46 AM |
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Yes I agree, this was for the SVA set up as it aided self centering on my Indy, I believe others have found this helped as well.
I will be changing mine back to 0 degrees or 1 degree tow in and we'll see how that changes the handling.
I thought that it was going to be very twitchy on the motorway with tow out, but it was very stable. Interestingly Allan Staniforth in one of his
books commented that tow out can sometimes help achieve a better turn in on corners, all shades of gray!!
Cheers
Ian
quote:
Originally posted by nitram38
Toe out is not a good idea on front wheels as your wheels will toe out normally as you drive forwards.
Most rear wheel drive cars have toe in on the fronts so that effectively the wheels straighten up when driving forwards.
You will probably get a lot of wear on the insides of your front wheels.
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mad4x4
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| posted on 19/6/08 at 11:24 AM |
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I struggled throught the SVA on Self centering eventually got there with Stupid ammounts of Toe in and hard Tyres. This wore the tyres on the 100 mile
round trip to the SVA so backed it off.
I can sort the hardness of the ride no probs. First step is to get a little more toe in and see how it goes. Had the ride set hard as not to bottom
out the zetec sump. But as that is now changed to Tiger Sump I can go for a softer ride.
Problem being up here in Scotland a "proffessional" on anything car related is like Rocking Horse Dung. Compare to Middle England.
Simple things like build and exhaust or tue Dellortto Carbs couldn't be done up here... so finding a "7" suspension expert - No
chance..>!
[Edited on 19/606/08 by mad4x4]
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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David Jenkins
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| posted on 19/6/08 at 11:33 AM |
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At one time I had a little toe-out and the straight-line handling was 'interesting', just as you describe. Now I'm on 0 degrees and
it's much more pleasant.
I have a suspension book at home (can't remember the author - Hammill?) and he recommends a little toe-out for track work - quick into corners,
twitchy straight-ahead - and 0 degrees or a little toe-in for road use - little more effort to get into a turn, but FAR more stable in a straight
line.
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whitestu
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| posted on 19/6/08 at 03:49 PM |
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Mine doesn't self centre much at all - it only passed the SVA with springs in the rack.
It's dead stable straight ahead though.
Stu
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