Se6/SE8 ride height

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SJM
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Se6/SE8 ride height

Post by SJM » Tue Aug 14, 2018 8:42 pm

Does anyone out there have a correct figure for the front ride height of the SE6/SE8 at normal static unladen condition please? I guess the most convenient figure would be the vertical distance from the front wheel centre to the lower edge of the front wheel arch.

thanks,
Stuart



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Se6/SE8 ride height

Post by Roger Pennington » Tue Aug 14, 2018 9:35 pm

For standard suspension, Reliant specified a distance of 13.64 inches between the top and bottom front damper eyes, as representing the standard suspension setup. (ie for the standard alignment of the wishbones, uprights etc).


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Se6/SE8 ride height

Post by philhoward » Tue Aug 14, 2018 10:15 pm

The wheel arch is probably the worst place to try and get a measurement as the mounds differed (albeit slightly) between cars, add in differing wheels, tyres (as not all tyres are the same size despite the numbers on the side), possible previous accident repairs - the list probably goes on.


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Se6/SE8 ride height

Post by SJM » Wed Aug 15, 2018 8:46 am

It is very difficult to measure accurately the 13.64" distance between the suspension unit eyes with the car on its wheels. The measurement would need to be very accurate to serve a useful purpose, due to the magnifying effect of the suspension geometry on wheel height.

Phil, I cannot believe that original bodies differed that much and differences in wheel and tyre size are irrelevant to the attitude of the suspension. The dimension I am seeking is quoted for many other cars, notably MGs, as an easy and convenient means of checking suspension attitude.

Can anyone assist please?



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Se6/SE8 ride height

Post by efi_sprintgte » Wed Aug 15, 2018 8:48 am

I measure main chassis rail to flat floor, standard will be around 6”


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Se6/SE8 ride height

Post by philhoward » Wed Aug 15, 2018 8:55 am

SJM wrote:
Wed Aug 15, 2018 8:46 am
Phil, I cannot believe that original bodies differed that much and differences in wheel and tyre size are irrelevant to the attitude of the suspension.
Suspension attitude, probably not. Height of the wheelarch, yes. I've seen floor to wheelarch figures anywhere between 21 and 24 inches mentioned so as you can see, it's a bit pointless as a measurement.

The 13.64" is actually the hole centres for a piece of steel bar which is put in place of the front spring/damper unit to set the theoretical standard height. That sets the suspension at its correct attitude, allowing for everything else to be adjusted accordingly.

A more accurate figure would be from the floor to the main chassis rail (assuming using 185/80x14 tyres from a certain manufacturer) but as far as I know, only the 13.64" figure is actually officially mentioned? As efi_sprintgte has just said. 6" sounds right to me BUT not if you're running 185/60x14 tyres, for example.


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Se6/SE8 ride height

Post by SJM » Wed Aug 15, 2018 9:02 am

efi_sprintgte wrote:
Wed Aug 15, 2018 8:48 am
I measure main chassis rail to flat floor, standard will be around 6”
That measurement will depend on tyre size and inflation pressure.

Phil, I am not asking for the floor to arch measurement, which will of course vary with tyre size, but the wheel centre to arch. What I am trying to determine is how the car is sitting with the suspension units installed, not how it would sit with the 13.64 measurement bars. If I can get a figure, I can then adjust the spring abutments on the suspension units to achieve the correct static suspension attitude, which is important.



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Se6/SE8 ride height

Post by philhoward » Wed Aug 15, 2018 9:12 am

SJM wrote:
Wed Aug 15, 2018 9:02 am
Phil, I am not asking for the floor to arch measurement, which will of course vary with tyre size, but the wheel centre to arch
Indeed you are - my apologies :oops: Many times the question of floor to wheelarch measurement has been asked so I went into autopilot-answer-mode-whilst-at-work but i still stand my part of my original answer - not all Scimitar bodies are created equal. For a figure within half an inch or so, then it's probably a valid measurement, but a another estimate is to look at the bottom wishbones/plate; if they're parallel to the ground, it's about right.


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Se6/SE8 ride height

Post by SJM » Wed Aug 15, 2018 5:01 pm

Thanks Phil. I had assumed that the lower wishbones should be roughly horizontal, but it would still be nice to have a correct wheel centre to arch figure.

Rgds,
Stuart



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Se6/SE8 ride height

Post by Dennis Nicholas » Wed Aug 15, 2018 7:00 pm

SJM wrote:
Wed Aug 15, 2018 5:01 pm
Thanks Phil. I had assumed that the lower wishbones should be roughly horizontal, but it would still be nice to have a correct wheel centre to arch figure.

Rgds,
Stuart
Correct' set up is with lower wishbone horizontal. Check by measuring from centre of inner and outer pivot bolts to ground. Same measurement = correct.
As others have said wheel centre to wheel arch is only a vague check and varies from car to car even set up correctly.
The workshop manual describes the use of the setting up bar........but simple to measure pivot bolt centres to ground.

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Se6/SE8 ride height

Post by scimjim » Thu Aug 16, 2018 10:33 am

The 6b in storage is approx 14” from wheel centre to arch. A bit high for my taste but it depends where you’re driving (the front spoiler is very low on 6b/GTC) and what look you’re going for.


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Se6/SE8 ride height

Post by SJM » Fri Aug 17, 2018 1:09 pm

A figure at last! Many thanks Jim.

Stuart



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Se6/SE8 ride height

Post by Dennis Nicholas » Fri Aug 17, 2018 10:36 pm

SJM wrote:
Wed Aug 15, 2018 9:02 am
If I can get a figure, I can then adjust the spring abutments on the suspension units to achieve the correct static suspension attitude, which is important.
SJM wrote:
Fri Aug 17, 2018 1:09 pm
A figure at last! Many thanks Jim.

Stuart
But still only a vague figure as explained by several above........bodies DO vary.
What is problem with measuring from lower wishbone pivot bolt centres to ground......some bolt heads even have a little nib at the centre of the head. You can have the car sitting on the ground while you adjust the bottom spring seating. As long as that little distance on the ground is flat it will not even matter what slope it is.

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Se6/SE8 ride height

Post by Dennis Nicholas » Sat Aug 18, 2018 8:53 am

My in use GTC is 15 inches wheel centre to underneath surface of wheel arch.

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