Min. Ground Clearance

[prelit]

Hi Guys,

Does anyone know what the min. clearance is?

4cms rings a bell.

If it 4cms then does it apply to the body or to the lowest point of the car (such as sump)?

Is it measured with the driver sat in the vehicle?

Thanks in advance,

Prelit.

[Blatman]

4 INCHES...

And according to the rules I saw for the race series, it's the height to the chassis. BUT, at Curborough some years ago in the Speed Series, I failed the height test as the "scrutineer" (and I use the term loosely ) measured under my sump. But even when you show them the rules and *prove* their measurements are fatally flawed, they still insist they are right. So double check the regs carefully and have them to hand if you get pulled...

[John Loudon - Sponsorship Liaison]

I can pretty much guarentee its not 4 INCHES. 45mm is in my mind. if you are anywhere near this with a Westfield than your suspension has collapsed  

[a4gom]

Blue book used to say 4cm to body haven't checked this years yet. Don't believe its mentioned in speed series regs so blue book would stand.

[Blatman]

Race Series regs say 4 inches...

The minimum ground clearance must not be less than 4” (100mm), measured from the underside of the chassis rail (front and rear) to the ground and measured with the driver out.

from page 5 of the race series thread...

I remember my problem clearly, as 4 inches is not quite as wide as my hand, and my hand would fit under the sump... just...

This is for road going clars. "Sports Libre" and other slick or "non road going" classes may be different.

[prelit]

Thanks for the replies,

Looking at a 2009 blue book & I have found :-

Body

47.  Ground clearance of all bodywork must be 4cm minimum.

I can't find any other referance to minimum ground clearance nor to how it's measured.

Prelit.

[John Loudon - Sponsorship Liaison]

Blatters - that sounds like it is that from a specific race series set of regs and not Blue Book?

Prelit - titanium skids for you my friend  

[Blatman]

Can't remember now, but I did have the Blue Book with me at the time as that was what I was waving in the face of the "scrutineer" as my contention was that ride heigth was measured to the chassis not the b****y sump. This *was* quite a while ago now to be fair. As you say, if it's 45mm, then I'd need wheels under my sump.

But this was a Speed Series round (our own, at Curborough) and I failed the ride height test

Still gets me hot under the collar...

[John Loudon - Sponsorship Liaison]

QUOTE

Still gets me hot under the collar...

Wuff wuff - down boy  

[prelit]

John,

I'm just setting a new base line with 13" rims & new springs.

Looking to run as low as possible without upsetting the

geo. too much.

I can ensure you the 'body' will be more than 40mm !!!!

Cheers,

Prelit.

[John Loudon - Sponsorship Liaison]

Like it. Low chassis. Body on stilts  

[Blatman]

[stephenh]

Section S of this year's bluebook, at para 10.2, says 4 cm.

I haven't checked the Speed Series regs, but I cannot recall seeing anything in there about min. ground clearance.

I'm glad it isn't 4", my road-going Westie, on 15" wheels, is only about 85mm under the chassis hoop which protects the transmission! Thats less than 3 1/2", and thats without me sitting in the vehicle!

[peterg]

There is no ride height regulation specific to the Speed Series, please consult the Blue Book for the correct information  

[stephenh]

I think that is what I did, Peter!