Lowered Impreza's - HELP PLEASE
19 October 2010, 07:41 AM
#1
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Lowered Impreza's - HELP PLEASE
Let me just explain what Im stuck on,
My 05 Impreza STI has some BC's fitted, to which it has been lowered by about 30mm, it has also been set up with a fast road setting, but.........
The rear cmaber cant be set any less than -1.75deg, really needs to be down to -1deg to finish the setting.
The reason it cant go no more is that Im told its reached the factory limit from the adjusters, and I need some aftermarkets ones to allow me more camber adjustment. Sounds fine I thought, but they are proving mega hard to find, my machanic has sourced some, but waiting for a price.
I thought Id found them myself, but they are just normal camber bolts that only give max of + or - 1.75deg, so its the same what I have already.
I'm told if I raise the rear up a bit, it will give some camber back, but dont want it going back to looking standard.
Question is then to all that have lowered there to around 30mm is.......
what rear camber set up do you have?
Did you need to fit new camber adjusters?
Thanks for any help forward
My 05 Impreza STI has some BC's fitted, to which it has been lowered by about 30mm, it has also been set up with a fast road setting, but.........
The rear cmaber cant be set any less than -1.75deg, really needs to be down to -1deg to finish the setting.
The reason it cant go no more is that Im told its reached the factory limit from the adjusters, and I need some aftermarkets ones to allow me more camber adjustment. Sounds fine I thought, but they are proving mega hard to find, my machanic has sourced some, but waiting for a price.
I thought Id found them myself, but they are just normal camber bolts that only give max of + or - 1.75deg, so its the same what I have already.
I'm told if I raise the rear up a bit, it will give some camber back, but dont want it going back to looking standard.
Question is then to all that have lowered there to around 30mm is.......
what rear camber set up do you have?
Did you need to fit new camber adjusters?
Thanks for any help forward
19 October 2010, 10:34 AM
#2
See my recent post #36 in the Suspension section:
https://www.scoobynet.com/852226-fit...y-depth-2.html
The system is Apex Gen2 which is "the same as" BC
The top hole on the rear strut/hub fixing is elongated to allow some camber adjustment - I assume your mechanic spotted this? It would appear in my case this still didn't give the required result on the left rear.
Raising the ride height by say 10mm, will reduce the camber, but only by a TINY amount
JohnD
https://www.scoobynet.com/852226-fit...y-depth-2.html
The system is Apex Gen2 which is "the same as" BC
The top hole on the rear strut/hub fixing is elongated to allow some camber adjustment - I assume your mechanic spotted this? It would appear in my case this still didn't give the required result on the left rear.
Raising the ride height by say 10mm, will reduce the camber, but only by a TINY amount
JohnD
Last edited by JohnD; 19 October 2010 at 10:37 AM.
19 October 2010, 07:16 PM
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He said its reached the limit to what the adjustment can give.
I called him today and questioned again the Camber Bolts I've seen, stating they give from between -1.75 & +1.75, so if he wants it set at -1 then these bolts are fine. but he did say he's seen then before stating that and they dont get near them settings.
He'll chase the company this week, if I not heard anymore them I'll get the bolts and see if they give the right setting. I'm thinking surely they will be fine, its false advertising if they dont right lol?
I called him today and questioned again the Camber Bolts I've seen, stating they give from between -1.75 & +1.75, so if he wants it set at -1 then these bolts are fine. but he did say he's seen then before stating that and they dont get near them settings.
He'll chase the company this week, if I not heard anymore them I'll get the bolts and see if they give the right setting. I'm thinking surely they will be fine, its false advertising if they dont right lol?
22 October 2010, 07:11 PM
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Come to a dead on on what the guy thought he could get. So I'll order some Camber Bolts and see if they can get me the -1deg rear.
Finding it hard to trace people that have lowered their car and run a similar set-up, 30mm isnt extreme atall, and im using a fast road set-up all things that are done when coilovers are fitted right??
Finding it hard to trace people that have lowered their car and run a similar set-up, 30mm isnt extreme atall, and im using a fast road set-up all things that are done when coilovers are fitted right??
22 October 2010, 08:12 PM
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My Bugeye is on Tein coilovers with a 30mm drop. I have whiteline camber bolts and no problem getting them setup. One bolt each side in the top hole is what I have.
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23 October 2010, 09:39 AM
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What does more or less rear camber basically do?
The car is set up as:- 0 Toe F&R
-0.5 front camber
-1.75 rear camber (maybe down to -1)
I dont want killer tyre wear though, It's never going to go on track either.
Last edited by DarrenSTI; 23 October 2010 at 09:42 AM.
28 October 2010, 01:14 AM
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Did the mechanic lower the car with the spring perch, or did they actually use the correct (i.e. thread the entire shock into the lower mount) way??
If they lowered the car like you do most suspension setups (on the spring perch) maybe this could cause the problem you have, as the BC's usually have no problems with not getting too little camber.
If they lowered the car like you do most suspension setups (on the spring perch) maybe this could cause the problem you have, as the BC's usually have no problems with not getting too little camber.
28 October 2010, 08:16 PM
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Did the mechanic lower the car with the spring perch, or did they actually use the correct (i.e. thread the entire shock into the lower mount) way??
If they lowered the car like you do most suspension setups (on the spring perch) maybe this could cause the problem you have, as the BC's usually have no problems with not getting too little camber.
If they lowered the car like you do most suspension setups (on the spring perch) maybe this could cause the problem you have, as the BC's usually have no problems with not getting too little camber.
Booked in for wed next week, having the rear extenders fitted, the bolts, raising the rear about 5-10mm, just to bring the wheel out from hiding under the arch a bit, raising should help get more camber anyways, but no much, bolts should do the rest.
29 October 2010, 10:56 AM
#16
i asked him today about this, but the BC's I have have no rear adjustment to give the camber, the fronts do though. But the rears have to be adjust through the factory links, hence there isn't enough, so brought some camber bolts.
Booked in for wed next week, having the rear extenders fitted, the bolts, raising the rear about 5-10mm, just to bring the wheel out from hiding under the arch a bit, raising should help get more camber anyways, but no much, bolts should do the rest.
Booked in for wed next week, having the rear extenders fitted, the bolts, raising the rear about 5-10mm, just to bring the wheel out from hiding under the arch a bit, raising should help get more camber anyways, but no much, bolts should do the rest.
I did an approximate calculation of the difference increasing the strut length (raise ride height) 10mm would do to the camber angle using a nominal strut length of 50cm, using simple trigonometry and it came out at 0.03 deg. or 1.8 minutes! That's pretty miniscule!
JohnD
Last edited by JohnD; 29 October 2010 at 10:59 AM.
29 October 2010, 11:08 AM
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Just to confirm - Raising the ride height will reduce the negative camber.
I did an approximate calculation of the difference increasing the strut length (raise ride height) 10mm would do to the camber angle using a nominal strut length of 50cm, using simple trigonometry and it came out at 0.03 deg. or 1.8 minutes! That's pretty miniscule!
JohnD
I did an approximate calculation of the difference increasing the strut length (raise ride height) 10mm would do to the camber angle using a nominal strut length of 50cm, using simple trigonometry and it came out at 0.03 deg. or 1.8 minutes! That's pretty miniscule!
JohnD
.Lets hope these camber bolts do what they say they do on the pack.
29 October 2010, 11:08 AM
#18
That may be better for fast road use but, quoting the handbook -
Front camber - 0deg. 25min.
Rear camber - 1deg. 30min.
Not that we take much notice of the hanbook (It doesn't even tell you to pre-fill the oil filter!) But it does show that the official word is - more neg. camber on the rear!
JohnD
Front camber - 0deg. 25min.
Rear camber - 1deg. 30min.
Not that we take much notice of the hanbook (It doesn't even tell you to pre-fill the oil filter!) But it does show that the official word is - more neg. camber on the rear!
JohnD
29 October 2010, 12:22 PM
#19
Its completely wrong unless you like an understeering pig of a car.
Prodrive recommended fast road camber settings are as follows:
-1.4 front, -1.1 rear. On a 4 wd car like an impreza or a fwd drive the main enemy is always understeer, so it makes sense to have more neg camber on the front to get soem bite and comparatively less on the rear to make the rear end more lively on turn in to combat the inherent understeering nature
Prodrive recommended fast road camber settings are as follows:
-1.4 front, -1.1 rear. On a 4 wd car like an impreza or a fwd drive the main enemy is always understeer, so it makes sense to have more neg camber on the front to get soem bite and comparatively less on the rear to make the rear end more lively on turn in to combat the inherent understeering nature
29 October 2010, 02:18 PM
#20
Its completely wrong unless you like an understeering pig of a car.
Prodrive recommended fast road camber settings are as follows:
-1.4 front, -1.1 rear. On a 4 wd car like an impreza or a fwd drive the main enemy is always understeer, so it makes sense to have more neg camber on the front to get soem bite and comparatively less on the rear to make the rear end more lively on turn in to combat the inherent understeering nature
Prodrive recommended fast road camber settings are as follows:
-1.4 front, -1.1 rear. On a 4 wd car like an impreza or a fwd drive the main enemy is always understeer, so it makes sense to have more neg camber on the front to get soem bite and comparatively less on the rear to make the rear end more lively on turn in to combat the inherent understeering nature
When I fitted the Prodrive springs to my 03 STi the recommended geometry was - front camber -1deg 15min 0deg front and rear toe. No quote for the rear camber.
JohnD
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