Can anybody tell me where to find the correct measurements for the bracket mounting points for the front wishbones on a book/mcsorely chassis, as i understand the measurements in the book are incorrect. Also im sure ive read somewhere about a jig that people have made up to position them, any pics much appreciated.

PS also worth mentioning that im planning on using a wide track front end from either MK or MNR, i dont know if this makes a difference to the bracket positions.

Many Thanks.

Bracket mounting geometry for a book chassis - I also used it for my +442 McSorley chassis.

I also made a jig to weld the brackets - pretty essential as I couldn't accurately locate fu1 & 2?? without knowing where the suspension bracket needed to be. Will look for a piture to post

JohnN

Dunno what happened to the jpeg I attached - let me know your e-mail address and I'll send you the dimensions sketch and a photo of a jig

John

Hi,
Take a look at my website in the June 2003 diary section. Down near the bottom of the page in the entry for the 22nd June you will see a verbose description of how I set up my brackets. Sorry I don't have many pictures of this but I was concentrating too much and forgot to take any...

Don't be afraid of having a go, you can always nip the tack welds off and have another go if you get it wrong. I was worried about this job at the time but it turned out fine in the end and wasn't a big deal.

You can get my website from the www button below my posting.
Cheers,
Craig.

Hi John

My email address is snellc@hotmail.com

I used a combination of threaded and flat bar to set mine up. I also altered the front section so the top is 25mm further back and made my wishbones so that the top brackets line up with the inner surface of my bottom brackets and line up with the chassis members they are welded to. It make lining it up easier and gives you the increased castor angle that the book lacks. I've tried to draw it as seen from the side.
Rescued attachment jig.jpg

Peteff,
yes that's pretty much what I did although I didn't do the castor angle correction by altering the LA,LB,LC,LD setup because I needed the maximum engine bay length. I just took another piece of 25mm square section, cut the ends at 45 degrees and capped the open ends with 3mm plate. I then doubled up the chassis tubing behind the overhanging suspension bracket. which should make it much stronger.

Also, be aware that altering the front assembly in the way you have done may make it more difficult to fit a commercial nosecone. Fine if you plan on making your own though I suppose.

I don't mean to be critical of your design, it's just good to be aware of the options and compromises. No right's and wrong's in this game in my opinion!

Cheers,
Craig.

great minds?.....

Chris,

Pictures of my jig in my archive.

Bear in mind that IIRC the MK wishbones are wider (by which I mean the bushes are further apart) than the book ones aswell as being longer. This will affect your placement of the rear brackets and also FU1/FU2. Also possibly rail 'E'.

Hope that helps,
James