John
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| posted on 6/12/02 at 11:30 PM |
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Chassis Height Above Ground
Due to reports of incorrect measurements I am about to start drawing out the chassis (Avon) using CAD. To check the suspension I need to know the
usual ride height above ground to the underside of the chassis. The car is road going only not to be used for racing.
Thanks for any help.
John.
Working on a CVH 1.8 engined Locost. Hoping to use as much as possible of Sierra donor. £210 left.
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interestedparty
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| posted on 7/12/02 at 07:53 AM |
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Here's a good way to sort out that particular problem-
Ideally the lower wishbones should be level. That's your fixed starting point. The relationship between the chassis rails and the wishbone is fixed
by the brackets and their mounting angle/position - So the question can be written, how high should the wishbones be? The answer to that will depend
on the wheel/tyre combination you are using, as the relationship between the wishbone and the hub will also be fixed by the position and type of
balljoint and the type of hub you are using.
The best way to get this information would be to set up a side i.e wishbone fixed to hub via balljoint and wheel bolted on. Set the wishbone level and
measure the gap to the ground. As shown above, you can then calculate the chassis height.
John
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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bsilly
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| posted on 7/12/02 at 04:15 PM |
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 i would reckon on 6 1/2" to 7 1/2" from floor to bottom of chassis..that would give yer about 4" under yer sump..assuming pinto:
mainly digger drivin me
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interestedparty
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| posted on 7/12/02 at 05:09 PM |
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quote:
Originally posted by bsilly
i would reckon on 6 1/2" to 7 1/2" from floor to bottom of chassis..that would give yer about 4" under yer sump..assuming pinto:
I would say that was a touch on the high side, and would mean having to set the wishbones sloping down towards the wheel. As I said above, though, it
depends on the wheel/tyre combination and the balljoint etc
John
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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stephen_gusterson
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| posted on 7/12/02 at 11:29 PM |
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i would say 7 ins from floor to ground is really high. my non book car is 8 and a bit ins from the floor and it looks a fair height more than standard
sevens I have seen.
As said, keeping wishbones level is a guide, but not essential - its the overall travel you have left if they are not level thats the important
bit.
I have read that below 4 ins ground isnt good.
Dont you guy's tend to chop the sump and stuff to allow the car to run lower?
atb
steve
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gjn200
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| posted on 8/12/02 at 12:32 AM |
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Er, whats wrong with tigers recommendation? Page 139
Graham
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interestedparty
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| posted on 8/12/02 at 09:36 AM |
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quote:
Originally posted by gjn200
Er, whats wrong with tigers recommendation? Page 139
Graham
For the benefit of those of us that don't have Avon's book, perhaps you would tell us what Avon's recommendation is? Then perhaps we could say what
was wrong with it (if anything)
John
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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bsilly
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| posted on 8/12/02 at 06:38 PM |
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well i must be wrong.......
mainly digger drivin me
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chrisg
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| posted on 8/12/02 at 06:43 PM |
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It says:-
Between 114-127mm (4.5-5 inches) from underside of chassis to ground.
Mines 120mm.
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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stephen_gusterson
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| posted on 8/12/02 at 07:33 PM |
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quote:
Originally posted by chrisg
Mines 120mm.
Cheers
Chris
We always suspected as much Chris.
Must be all that Northern pollution.
Glad I'm not from 'tup narf' now
 
atb
steve
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Peteff
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| posted on 8/12/02 at 07:51 PM |
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height from ground
It's the cold weather that does it mate.
But on the chassis height, mine is 5" high at the front and 6" at the rear although you don't really notice the difference just by looking.
yours, Pete
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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chrisg
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| posted on 8/12/02 at 08:25 PM |
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quote:
Glad I'm not from 'tup narf' now
How glad do you think we are!!
Yep, 120mm is an average(ride height, you divvy) it's slightly higher at the back
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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cymtriks
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| posted on 9/12/02 at 12:01 PM |
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I just thought I'd point this out. I've always assumed that statement along the lines of "about 4-1/2 inches ground clearance" refers to laden
ride height which means that unladen will be a bit more. I would guess it'll only be about half an inch more though depending on the chosen spring
rates and the weights of the driver, passenger, petrol, etc.
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John
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| posted on 11/12/02 at 12:01 AM |
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Thanks all for help.
John.
Working on a CVH 1.8 engined Locost. Hoping to use as much as possible of Sierra donor. £210 left.
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