Way too low

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Ken Davies
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Way too low

Post by Ken Davies » Thu Aug 15, 2019 6:42 pm

IMG_20190815_180057.jpg
IMG_20190815_180057.jpg (112.01 KiB) Viewed 671 times
My car is so low it grounds under heavy braking, there's about 3" clearance from chassis to ground by the wishbones. I think the wishbones are wrong way up but surely it can't just be that. What else could be wrong and how do I check, please?

I had new, standard springs from QRG fitted last year and a bounce test suggests the shocks are OK. Wheels and tyres are standard too. Thanks.


1975 SE5a JTF843P, 1966 AH Sprite mkIII in progress

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Way too low

Post by philhoward » Thu Aug 15, 2019 8:02 pm

Your wishbones look upside down - and your tyres look rather low profile?


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Way too low

Post by efi_sprintgte » Thu Aug 15, 2019 8:48 pm

What actual size are the tyres? They seem to be abit flat too?

Wishbones are upside down, I would be all over your wishbone brackets with a fine tooth comb too.

Instant ride height fix would be adjustable spring seat dampers of course.


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Way too low

Post by Ken Davies » Thu Aug 15, 2019 8:51 pm

Hi Phil, tyres are good fat original spec, must be a bad angle for the photo. I think they're at 24psi as per the manual.
How much would righting the wishbones lift the car?


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Way too low

Post by Gillsfan » Thu Aug 15, 2019 9:03 pm

No wanting to spread panic or alarm but rat rod has slightly lowered front suspension (spacers not wishbones swapped) and low profile tyres (being changed soon) and it's not as low as yours. My front valance is about 5 inches from the floor. Sorry it's up on axel stands and I'm on holiday so I can't check the chassis height.


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Way too low

Post by Ken Davies » Fri Aug 16, 2019 6:43 am

Thanks for your replies so far. Tyres are 185/70/14,
Righting the wishbones is a given but I think, from your replies, is unlikely to be the only issue. To my simple mind the only other factor is the length of the shock absorber under load so a pair of new ones needed. Is there anything else I'm missing?


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Way too low

Post by gtcse8 » Fri Aug 16, 2019 8:17 am

Length of shocker is irrelevant when on the car for ride height. :!:
UNLESS its TOO Short and the damping rod hit the inside of the shocker body. :w
Which is unlikely :?


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Way too low

Post by peter freeman » Fri Aug 16, 2019 8:31 am

putting the wishbones right will raise by about 1" - from memory.



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Way too low

Post by rkclodhopper » Fri Aug 16, 2019 9:47 am

The ride height can be influenced by several factors but the first I would check is to make sure the springs are standard, the wrong ones or some that have been shortened by a previous owner would make it sit low and they are not expensive to buy. The dampers could potentially be the wrong ones, but that would become fairly obvious when you tried fitting the correct springs, but if the dampers are damping I would just try the springs first and dampers are more expensive than springs. The standard geometry should see the lower wishbone level to the ground and in your picture the lower mount bracket looks correct.

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Way too low

Post by Coupe Racing » Fri Aug 16, 2019 9:47 am

I would look at the springs as they look old and determine ride height too


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Way too low

Post by Ken Davies » Fri Aug 16, 2019 9:57 am

OK, feeling slightly baffled now! If the wishbones account for an inch and the shocker is irrelevant for the height where do I find another inch. 4" still seems low and the back does not look abnormally high.


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Way too low

Post by gtcse8 » Fri Aug 16, 2019 9:58 am

Ken Davies wrote:
Thu Aug 15, 2019 6:42 pm
I had new, standard springs from QRG fitted last year
That rules out Cut and lowered springs surely ??. :?:
But they do look very grotty for year old parts. :(


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Way too low

Post by peter freeman » Fri Aug 16, 2019 10:10 am

Perhaps there is a car near you you can use as a comparison, the eye is better than the written word



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Way too low

Post by Nick » Fri Aug 16, 2019 10:15 am

I agree re springs. As a rough guide the lower wishbone should be horizontal at rest. Yours look about 50mm too low.


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Way too low

Post by rkclodhopper » Fri Aug 16, 2019 10:50 am

Ken
Just been to the garage to measure my 5a, this is with the car on its wheels.
Top mount bolt centre to top face of spring 55mm.
Top face of spring to bottom face of spring 230mm.
Bottom face of spring to lower mount bolt centre 70mm.
Total coil-over unit top bolt centre to lower bolt centre 355mm.

Richard

PS just an observation from the picture, if you have the wrong (too short) damper and the correct spring I would expect to see that the spring was badly compressed to get it to fit, to the point where it was coilbound, but it looks fine.

PPS I am just South of Alton so not far from you, your welcome to come and have a look sometime.



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