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On an otherwise stock surf, nothing at all. Or if you wanna be very anal, around 8mm. Do the maths.
Trigonometry - the engineers friend.
dont listen to him he dont know $$$$ about trigo whatsisname. but hes also right.if you lift your surf using l/c springs and looking from the rear your axle is still pretty much central then your ok however if on the other hand you find that you axle is out of centre by an inch or two.you will need an adjustable panhard rod to correct it.
in my capacity as anal pedant,
if by using a hecke algebra you move from coordinate geometery,
to modular geometry,8mm could be construed as a fatal flaw in your supposition,
in my capacity as anal pedant,
if by using a hecke algebra you move from coordinate geometery,
to modular geometry,8mm could be construed as a fatal flaw in your supposition,[/QUOTE]
I'll have some of what you're on!
It's all about triangles, you dont need to get all intradimensional on me!!
i'd let the springs settle in for a week or two and then use a tape measure each side, and measure from chassie to tyre center. if it only needs extending by half inch, that means that when you look in the off side mirror you will see the back wheel sticking out an inch moor than it was beffor, even with wheel arch extensions, and then looking in the near side mirror it just looks odd and i couldn't live with it, it just seemed un holy, and for the sake of 40 or so quid and a bit of spannering you can put it right.
i don't know where the mentioned 8mm of rod extension comes from because i only lifted mine by 2" and had to lengthen by 12mm on a three quater full tank and a 25kilo sand bag in the back, the lc springs go up 3" i believe,
the maths and formulars allways look good on the black board or calculator,
but you put a tape measure by the truck and it'l be out,
ok the difference between 8mm and 12mm is only 4mm,
in my tool box that makes the maths and triginometery wrong.
i'd let the springs settle in for a week or two and then use a tape measure each side, and measure from chassie to tyre center. if it only needs extending by half inch, that means that when you look in the off side mirror you will see the back wheel sticking out an inch moor than it was beffor, even with wheel arch extensions, and then looking in the near side mirror it just looks odd and i couldn't live with it, it just seemed un holy, and for the sake of 40 or so quid and a bit of spannering you can put it right.
i don't know where the mentioned 8mm of rod extension comes from because i only lifted mine by 2" and had to lengthen by 12mm on a three quater full tank and a 25kilo sand bag in the back, the lc springs go up 3" i believe,
the maths and formulars allways look good on the black board or calculator,
but you put a tape measure by the truck and it'l be out,
ok the difference between 8mm and 12mm is only 4mm,
in my tool box that makes the maths and triginometery wrong.
Mathematical rules like trigonometry CANNOT be wrong. You'll probably find where the errors creep in are due to pretty slack tolerances on Toyotas part. The attachment to the body to the attachment on the axle, and the axle itself make a triangle. They contain 180 degrees, always (in this universe anyway) so if you measure properly, the maths will be right.
I worked the angles out on my truck, and after measurement innaccuracy, the difference on (settled) LC springs worked out at ~8mm of shift. Even that would probably be less if the trailing arm bushes are good.
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