Any tips on measuring bumpsteer ?????
Discussion
Check out my original post called the facts about tuscan suspension. It might help clear up some questions.
I used this video to base my experienet on and it explainshow to set up the car why you set it up the way they did.
http://youtu.be/LO07qmJ9zkk
You have my number Ant
I used this video to base my experienet on and it explainshow to set up the car why you set it up the way they did.
http://youtu.be/LO07qmJ9zkk
You have my number Ant
MPETT said:
Check out my original post called the facts about tuscan suspension. It might help clear up some questions.
I used this video to base my experienet on and it explainshow to set up the car why you set it up the way they did.
http://youtu.be/LO07qmJ9zkk
You have my number Ant
cheers Mart, getting my simple mind around it now.I used this video to base my experienet on and it explainshow to set up the car why you set it up the way they did.
http://youtu.be/LO07qmJ9zkk
You have my number Ant
will call if I fail !!!
What does that mean in terms of angle the wheel has turned through though?
By far the easiest way is to get your car to sportmotive and put it on the 2 post ramp, remove the front springs and dampers and then put a two wheel alignment gauge across the front axle. Start with the car on the floor and gradually raise it an inch at a time reading off the toe readings as you go through to full droop. Accepted wisdom seems to be that if the car gains a small amount of toe out in compression that's fine (most tvrs I've measured seems to be around half a degree toe out from full droop to full compression). If it comes out "about right" i suggest leaving well alone. The recent history of tvrs is littered with bump steer mods that are quite useless.
By far the easiest way is to get your car to sportmotive and put it on the 2 post ramp, remove the front springs and dampers and then put a two wheel alignment gauge across the front axle. Start with the car on the floor and gradually raise it an inch at a time reading off the toe readings as you go through to full droop. Accepted wisdom seems to be that if the car gains a small amount of toe out in compression that's fine (most tvrs I've measured seems to be around half a degree toe out from full droop to full compression). If it comes out "about right" i suggest leaving well alone. The recent history of tvrs is littered with bump steer mods that are quite useless.
spitfire4v8 said:
What does that mean in terms of angle the wheel has turned through though?
By far the easiest way is to get your car to sportmotive and put it on the 2 post ramp, remove the front springs and dampers and then put a two wheel alignment gauge across the front axle. Start with the car on the floor and gradually raise it an inch at a time reading off the toe readings as you go through to full droop. Accepted wisdom seems to be that if the car gains a small amount of toe out in compression that's fine (most tvrs I've measured seems to be around half a degree toe out from full droop to full compression). If it comes out "about right" i suggest leaving well alone. The recent history of tvrs is littered with bump steer mods that are quite useless.
Joo, I think it equates to 5' of toe-in from ride height to full compression and 10' from full droop to full compression.By far the easiest way is to get your car to sportmotive and put it on the 2 post ramp, remove the front springs and dampers and then put a two wheel alignment gauge across the front axle. Start with the car on the floor and gradually raise it an inch at a time reading off the toe readings as you go through to full droop. Accepted wisdom seems to be that if the car gains a small amount of toe out in compression that's fine (most tvrs I've measured seems to be around half a degree toe out from full droop to full compression). If it comes out "about right" i suggest leaving well alone. The recent history of tvrs is littered with bump steer mods that are quite useless.
http://www.trackace.co.uk/Manual/Conversion%20Char...
18" wheels are further down...
Edited by Ant. on Sunday 20th October 19:59
It would be the first I've seen with toe in during compression. It sounds the right thing to do because it would help protect the inner tyre edge during negative camber gain on heavy braking, but apparently gives all manner of over-steering effects as the car rolls into corners, so some compression toe out is normally built in to give a roll understeer effect on the front axle. I'd suggest to measure it again and see if you've got it right because roll toe in isn't how you'd set a stable front end.
spitfire4v8 said:
It would be the first I've seen with toe in during compression. It sounds the right thing to do because it would help protect the inner tyre edge during negative camber gain on heavy braking, but apparently gives all manner of over-steering effects as the car rolls into corners, so some compression toe out is normally built in to give a roll understeer effect on the front axle. I'd suggest to measure it again and see if you've got it right because roll toe in isn't how you'd set a stable front end.
Joo, I have just checked and putting slight pressure on the front of the wheel inwards moves the laser on the target in the same direction that it moves during the test from full droop to compression.So yes, it seems it is toeing in from droop to comp.
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