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Chassis Turret Cross Tube


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Hello

 

I Googled this and it came up with a thread started in 2009, whilst it briefly mentioned Cross Tube it was mainly about the Fulcrums, so hence new post.

 

I have rebuilt my 4A chassis ready to go to the body man to have the tub dropped on for final gap checks etc. the Chassis doesn't yet have the engine in, nor is it on wheels yet, the chase is on a Dolly, it soon will have engine and wheels, but.... yesterday I fitted the Cross Tube, and hear comes the query, there was a circa 4mm gap between the Tube and the inside of the Turrets, Tube too short in effect.

 

However It all bolted up ok without any problem that I could see, or undue straining. So, is this 'normal' or have I done something wrong, or have a problem I didn't know about until yesterday, or all of the above?

 

Appreciate the usual guidance. Thanks.

 

 

Ian

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Ian

I wouldnt worry about a 4mm difference. Especially on a bare chassis.

 

With engine in and on 4 wheels I would expect that to close up naturally. So bolting it up as you have done is no worry.

 

I have heard that in the early Racing days tubes were shortened to roll in the turrets to get more camber.

There are suspension mods to do this now so not recommended but illustrates the - flexibility- !!

Edited by Hamish
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It's easy to think of the chassis as being rigid - but it isn't.

The distance between the front suspension pillars is a

good example.

 

Bare chassis - the cross tube has a clearance.

Chassis with engine - probably a good fit.

Chassis with engine & body - probably appears to be too

short. - BUT - jack up centrally under the front chassis

and you'll get a different story.

 

You are aware of the period surreptitious modification that

alters front suspension geometry - I haven't read about

anyone other than Kas Kastner doing that (or at least,

owning up to it)

 

AlanR

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