Anyone tried Extending Wheelbase by Reversing Springs?

silly.kid
Here and there
Posts: 21
Joined: January 30th, 2011, 3:11 pm

Anyone tried Extending Wheelbase by Reversing Springs?

Unread post by silly.kid » October 20th, 2016, 10:00 am

Hi guys,

I have a 1977 BJ40 and am wondering what people have done to extend their wheelbase. I am currently running 2 inch dobinsons FJ40 springs with anti inversion shackles from superior engineering and my shackle angle is horrible (vertical). Its been like this for three years, and since one of my front springs has failed I want to replace them with something longer.

Has anyone run flipped 60 series springs. I mainly need to know about the front set. I don't want to reverse the hangers because of qld laws but redrilling to relocate the centre pin is ok with me.

Any info would be great.

Cheers, Kim

typhoeus
Need to get out more
Posts: 2058
Joined: February 6th, 2011, 8:25 pm

Re: Anyone tried Extending Wheelbase by Reversing Springs?

Unread post by typhoeus » October 20th, 2016, 8:29 pm

drilling holes in leaves is problematic. (a) they are very hard to drill, (b) the spring is weakened at the point of the second hole ( the one not used for the centre bolt) and may break there,(c) changing the wheelbase at the front may have implications for the steering linkages and geometry, and may also be illegal.
Using a longer spring itself is ok provided the axle is maintained in the original position,( altho I suppose a small variation would hardly be noticed by Mr Plod) and the extra length doesn't cause the shackle to bind under full compression

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