meesonia Posted April 8, 2018 Report Share Posted April 8, 2018 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 Quote Link to post Share on other sites
Hamish Posted April 8, 2018 Report Share Posted April 8, 2018 (edited) 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 April 8, 2018 by Hamish Quote Link to post Share on other sites
John Morrison Posted April 8, 2018 Report Share Posted April 8, 2018 +1 for the above, in fact you may find that with all the weight back in the car and you ever need to remove that crosstube it can be seemingly too long. John. Quote Link to post Share on other sites
TR 2100 Posted April 8, 2018 Report Share Posted April 8, 2018 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 Quote Link to post Share on other sites
meesonia Posted April 8, 2018 Author Report Share Posted April 8, 2018 Hi all Thanks for the replies, Cheers Ian Quote Link to post Share on other sites
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