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Old 21-04-2019, 19:43   #1
Drewpal
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Advice on fast road setup.

Hi guys.
Iíve had my Evo for over 2 year now. And havenít had the tracking checked. I had the wheels off today and noticed the spring preload was different from front lest to front right(10mm), is this normal? Also should the camber be the same on both sides from the top adjusters? If not Iíll get her booked in.
Thanks in advance.
Drew.

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Old 22-04-2019, 13:12   #2
Rampant
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Not unusual to have different top mount positions for the same actual wheel camber.
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Old 22-04-2019, 19:05   #3
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Thanks. But the rebound should be the same?


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Old 23-04-2019, 07:39   #4
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Coilovers should always be set the same across an axle. Which Ohlins have you got on the car - the ones with a single adjuster on the top? Sounds like you need to get a proper alignment done asap.
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Old 23-04-2019, 09:43   #5
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Quote:
Originally Posted by Rampant View Post
Not unusual to have different top mount positions for the same actual wheel camber.
Really? I actually thought that the top mount position must be (at least almost) identical for the same actual wheel chamber (provided that the chasis is straight etc).
Would something like that be acceptable? (please have a look at the photos). The chasis of the car in the photos is straight (undamaged, uncrashed etc), and I was thinking that this is an example of wrong installation..
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Old 23-04-2019, 11:36   #6
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The camber plates can differ if the eccentric bolt positoins which adjust the camber at the hub are not the same.

Also the height of the coilovers will also differ if the car has been properly corner weighted - is this what you're reffering to as the rebound measurement?
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Old 23-04-2019, 15:25   #7
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Had this with perevious cars it’s the subframe needs moving over. If you look at your wheels to arch I bet one sits in further than the other
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Old 23-04-2019, 15:29   #8
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The camber plates can differ if the eccentric bolt positoins which adjust the camber at the hub are not the same.
Shouldn't the position of the eccentric bolts be (at least almost) the same? I mean the meaning of the adjustable top mounts is, amongst others, to be able to give or take a bit more camber without realignment (ie at the track etc)..
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Old 23-04-2019, 17:37   #9
Drewpal
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Quote:
Originally Posted by MR Wallace View Post
The camber plates can differ if the eccentric bolt positoins which adjust the camber at the hub are not the same.

Also the height of the coilovers will also differ if the car has been properly corner weighted - is this what you're reffering to as the rebound measurement?


No sorry I meant the spring preload was different . Not massively. I think it was something like 15mm. But I went back to the setup guide, that came with the coilovers and they show them the same so I adjusted it. Also the preload wasnít set to the cars recommend setting from ohlin, so it was set to 5 not 10. I thought it felt a little harsh to drive.


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Old 24-04-2019, 08:03   #10
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There seems to be a lot of muddled terminology being used here!

You still don't say which model of Ohlins you have? Are they the old type where you have to use the spring perch position to set the ride heights, or of the more modern version with separate ride height and spring pre-load adjustment?

Regardless of which ones, firstly the camber bolts on the bottom of the strut need to be set the same way round (in the -2 degs position). Then you would set ride heights/pre-loads, then set up the geometry and then start playing around bump/rebound settings.


Incidentally, there's something very odd going on with the way the topmounts are configured - even the adjuster plate bolts are in different holes between sides. But at least it should be very easy to sort it all out :-)
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Old 08-05-2019, 19:51   #11
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Quote:
Originally Posted by plip1953 View Post
There seems to be a lot of muddled terminology being used here!

You still don't say which model of Ohlins you have? Are they the old type where you have to use the spring perch position to set the ride heights, or of the more modern version with separate ride height and spring pre-load adjustment?

Regardless of which ones, firstly the camber bolts on the bottom of the strut need to be set the same way round (in the -2 degs position). Then you would set ride heights/pre-loads, then set up the geometry and then start playing around bump/rebound settings.


Incidentally, there's something very odd going on with the way the topmounts are configured - even the adjuster plate bolts are in different holes between sides. But at least it should be very easy to sort it all out :-)

Sorry for the delayed reply. I have the set up guide. Iíve adjusted it to this. One side was out, and all the rebound adjusters were set to 5 rather than 10(as advised by ohlin)
Thanks for the advice Iíll check again tomorrow, to see if the camber bolts are in the correct position. This is what I have to go off-


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