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Old 05-09-2006, 10:44 AM   #5101
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Quote:
Originally Posted by understeer
Thanks again vortex.
That is where I am planning to run the car! What about the spacers on the lower suspension mounts? What do they do?
About 4mm droop front and rear is a good starting point.
The spacers under the suspension mounts control the roll centre (the amount the car can roll). Good starting point is none under the rear mounts and 1mm under each of the front mounts.
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Old 05-09-2006, 11:14 AM   #5102
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Quote:
Originally Posted by John Pape
About 4mm droop front and rear is a good starting point.
The spacers under the suspension mounts control the roll centre (the amount the car can roll). Good starting point is none under the rear mounts and 1mm under each of the front mounts.
would you use the same amount if you had diff in front or is this a spool/one way setup in the droop department

i use diff every where other wise i just destroy drive shafts left,right & centre

when i came second at carpetwars in it`s first year i ran then 1mm spacers under the front mounts , don`t now why i went away really , to many `other` cars i guess , got confusing in the end
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Old 05-09-2006, 11:52 AM   #5103
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Yes, same droop whatever, run less indoors, around 5 usually.

Part no for ball joints:

ZC206LH large size
ZC206MH medium size
ZC206SH small size

You will need 1 packet of each to do complete car.
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Old 05-09-2006, 12:16 PM   #5104
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JOHN
ask chris which shop`s in the UK stock the ZM 413 hub`s , being very old stock for a very old car (MR4 TC)
tracking one down is a problem
reason i asked about the droop you usually get `diff out` mid corner if you run little droop
must setup sheets have like 4 rear / 5 front

does the LCG/BD like i bit more droop outside then the SD did or is it in the `feel` on the day scenerio

stewart i can see you looking .i`m testing this first on sunday ,.not you
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Old 05-09-2006, 12:17 PM   #5105
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stewart my LCG built now
just setting up the Li-Po pack to sit init nicely
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Old 05-09-2006, 12:19 PM   #5106
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Please post some pics after doing that!!!
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Old 05-09-2006, 12:29 PM   #5107
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stewart i can see you looking .i`m testing this first on sunday ,.not you [/QUOTE]

ok Colin you do it first, we know you need all the help you can get
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Old 05-09-2006, 01:24 PM   #5108
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Quote:
Originally Posted by John Pape
Thats the ticket, he was running a 0.5 shim under all the mounts on the car to raise the roll centre to induce some roll, thus grip and steering. Stafford is quite technical and low grip.
That doesn't make sense, raising the RC makes the car roll less.
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Old 05-09-2006, 01:38 PM   #5109
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by putting shims under the sus blocks you are physically raises the CoG of the car (i think ) getting out of my depth here ,think i shut up
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Old 05-09-2006, 01:40 PM   #5110
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Quote:
Originally Posted by Stewart Bevan
stewart i can see you looking .i`m testing this first on sunday ,.not you
ok Colin you do it first, we know you need all the help you can get [/QUOTE]
i`m catching up fast 2nd time on asphalt since sept 2005

as you lot put i need a `proper` car to keep up
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Old 05-09-2006, 01:52 PM   #5111
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Quote:
Originally Posted by TRF415boy
That doesn't make sense, raising the RC makes the car roll less.
Should roll more...
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Old 05-09-2006, 01:56 PM   #5112
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Quote:
Originally Posted by pops
Should roll more...
Err nope. low roll centre = higher distance between the roll centre and the centre of gravity = more roll. High roll centre is the opposite so less roll.
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Old 05-09-2006, 02:46 PM   #5113
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no if you think about it the CoG has been raised so the weight is higher up and when the car leans the weight is higher up and pushes the car over more.

that probaly makes no sense so heres an example
think of it like a double decker bus (poor example i know but...) the weight is so high up the bus leans and is close to rolling in the corners. so raising the roll centre will give the car more roll.

HTH
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Old 05-09-2006, 02:57 PM   #5114
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Quote:
Originally Posted by Scott Taylor
no if you think about it the CoG has been raised so the weight is higher up and when the car leans the weight is higher up and pushes the car over more.

that probaly makes no sense so heres an example
think of it like a double decker bus (poor example i know but...) the weight is so high up the bus leans and is close to rolling in the corners. so raising the roll centre will give the car more roll.

HTH
Scott

That's the funniest thing i've ever read on RC Tech The effect on the centre of gravity is so small, raising your bodyshell by one notch has 100 times more effect on it. Now read me well : lower the Roll Centre (no matter HOW) = more roll, raise the RC = less roll. Now, repeat after me
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Old 05-09-2006, 02:59 PM   #5115
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lol ok but why is it several people on here have said to you that its the other way around but yet you still seem to believe your right


yes it is a very small change but it is how it works.....

heres another example you get a pendulum (spelling?) and put the weight near the bottom and it wont lean as much as if the weight is higher up.....
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