Geometry settings
04 November 2015, 10:09 PM
#1
Geometry settings
As per the title getting my lowering springs fitted this week on my Blobeye sti and was hoping someone on here will have some geometry settings that I can have my car set up to match? Car will be on tein s lowering springs with KYB ultra shocks and car will be lowered by 35-40mm? Thanks in advance.
05 November 2015, 11:44 AM
#2
MUCH too far, unless you do lots of expensive stuff to the suspension, you will have effectively ruined the ride and, sadly, the roadholding.
Esp with that sort of lowering, there are no hard and fast values. I suggest taking it somewhere who KNOW what they are doing, Powerstation, or Carnetix, and discussing it with them.
Esp with that sort of lowering, there are no hard and fast values. I suggest taking it somewhere who KNOW what they are doing, Powerstation, or Carnetix, and discussing it with them.
05 November 2015, 12:20 PM
#3
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Your car will be on the bumpstops, roll centre will be messed up, and you won't have the adjustability to move camber back to where it should be.
Try sourcing some pca springs. They come with shorter replacement bumpstop, and revised geo settings. Lowering won't be as much as Tein springs but at least it will drive nice.
Try sourcing some pca springs. They come with shorter replacement bumpstop, and revised geo settings. Lowering won't be as much as Tein springs but at least it will drive nice.
Last edited by InTurbo; 05 November 2015 at 12:24 PM.
05 November 2015, 03:38 PM
#4
I'm not sure what to do now 
not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!
not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!
05 November 2015, 05:39 PM
#6
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I'm with the majority
I've had my car at all sorts of heights and lowering as much as 40mm just destroys the ride, unless you change all sorts of other components.
Bottoming out and skipping round corners isn't much fun.
Anyone that claims a decked Subaru with just lowering springs handles well is either lying to themselves or just plain can't drive
I realise that sounds blunt but it's true
I've had my car at all sorts of heights and lowering as much as 40mm just destroys the ride, unless you change all sorts of other components.
Bottoming out and skipping round corners isn't much fun.
Anyone that claims a decked Subaru with just lowering springs handles well is either lying to themselves or just plain can't drive
I realise that sounds blunt but it's true
05 November 2015, 05:44 PM
#7
I've used Tein S Tech springs with the same drop on my standard WRX shocks for the last 7 years with no issues whatsoever. Car handling is great, ride is great. Not on the bump stops at all. FAR better than coilovers and handling far improved over the standard springs.
Quitre honestly couldn't recommend my setup more. Have just ordered whiteline ARB, CDF drop links and uprated ARB bushes today too.
Quitre honestly couldn't recommend my setup more. Have just ordered whiteline ARB, CDF drop links and uprated ARB bushes today too.
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05 November 2015, 07:27 PM
#11
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I'm not sure what to do now not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!
not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!Believe me If you like fast road driving your car is a lot faster down a bumpy uk road when the suspension deals with the bumps and undulations making the car stable and giving you confidence to push on.
Totally the opposite of a car on a firm crap setup giving you no confidence.
The pca springs are more expensive but there designed for the car hence the shortened progressive bump stops and the correct geo setting included.
Anyone who says there slammed Impreza handles well obviously has never driven a well sorted Impreza.
People seem to think that just because the suspension is hard and there's no body roll they must have good handling!
Far from it, you need a element of controlled body roll / weight transfer to help put weight on to the tyres during a cornering, acceleration and braking to gain grip.
A stiff set up will brake away earlier especially in wet conditions.
This is made even worse if you add high camber angles as most overly lowered cars have. The whole reason of camber is so that the car rolls on to the tyre during hard cornering creating more grip, this won't happen with a overly stiff lowered setup.
Your also going to be running your control arms parallel to the floor or even pointing upwards! This will ruin your roll centre making lateral forces appear greater.
It's a funny thing roll centre, If the spring rate remains the same the roll would increase as the height of the car is lowered.
Another bad point of not having your control arms at a downward angle is your camber curve is reduced. Meaning when your suspension Compresses during a corner you will loose camber angle and have less grip.
Ideally they should be facing downward so as the suspension compresses the camber angle become greater helping you to gain more grip the harder you turn.
This Is all due to having McPherson strut suspension, it doesn't like being overly lowered.
Search ,Roll centre and camber curve.
Last edited by InTurbo; 05 November 2015 at 07:44 PM.
05 November 2015, 07:41 PM
#12
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As per the title getting my lowering springs fitted this week on my Blobeye sti and was hoping someone on here will have some geometry settings that I can have my car set up to match? Car will be on tein s lowering springs with KYB ultra shocks and car will be lowered by 35-40mm? Thanks in advance.
A nice neutral set up would be
Front camber -1.30
Front toe 0.03 total 0.06
Rear camber -1.00 or as close as you can get
Rear toe 0.03 total 0.06
If you want your car more biased towards understeer increase rear camber to match the front.
05 November 2015, 10:16 PM
#14
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I'm not sure what to do now not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!
not to keen on how high she sits but don't want to ruin the handling even though I only do fast road driving. I have spoke to some people who have lowered their Scooby's by 30-40mm and they say it's ok, doesn't sit on the bump stops snd hasn't ruined the handling or ride etc but equally some have said it will ruin the car and I don't fancy paying £250-£300 for the pca springs!!http://www.grinspeed.co.uk/services/geometry-setups/
06 November 2015, 12:32 PM
#18
The stock Sti front struts are slightly sat on the front bumpstops as standard. You can't see them as there inside the strut! Technically it's classed as Spring assister, adding lowering springs will crush the bump stop/assister and provent the damper from absorbing bumps.
Believe me If you like fast road driving your car is a lot faster down a bumpy uk road when the suspension deals with the bumps and undulations making the car stable and giving you confidence to push on.
Totally the opposite of a car on a firm crap setup giving you no confidence.
The pca springs are more expensive but there designed for the car hence the shortened progressive bump stops and the correct geo setting included.
Anyone who says there slammed Impreza handles well obviously has never driven a well sorted Impreza.
People seem to think that just because the suspension is hard and there's no body roll they must have good handling!
Far from it, you need a element of controlled body roll / weight transfer to help put weight on to the tyres during a cornering, acceleration and braking to gain grip.
A stiff set up will brake away earlier especially in wet conditions.
This is made even worse if you add high camber angles as most overly lowered cars have. The whole reason of camber is so that the car rolls on to the tyre during hard cornering creating more grip, this won't happen with a overly stiff lowered setup.
Your also going to be running your control arms parallel to the floor or even pointing upwards! This will ruin your roll centre making lateral forces appear greater.
It's a funny thing roll centre, If the spring rate remains the same the roll would increase as the height of the car is lowered.
Another bad point of not having your control arms at a downward angle is your camber curve is reduced. Meaning when your suspension Compresses during a corner you will loose camber angle and have less grip.
Ideally they should be facing downward so as the suspension compresses the camber angle become greater helping you to gain more grip the harder you turn.
This Is all due to having McPherson strut suspension, it doesn't like being overly lowered.
Search ,Roll centre and camber curve.
Believe me If you like fast road driving your car is a lot faster down a bumpy uk road when the suspension deals with the bumps and undulations making the car stable and giving you confidence to push on.
Totally the opposite of a car on a firm crap setup giving you no confidence.
The pca springs are more expensive but there designed for the car hence the shortened progressive bump stops and the correct geo setting included.
Anyone who says there slammed Impreza handles well obviously has never driven a well sorted Impreza.
People seem to think that just because the suspension is hard and there's no body roll they must have good handling!
Far from it, you need a element of controlled body roll / weight transfer to help put weight on to the tyres during a cornering, acceleration and braking to gain grip.
A stiff set up will brake away earlier especially in wet conditions.
This is made even worse if you add high camber angles as most overly lowered cars have. The whole reason of camber is so that the car rolls on to the tyre during hard cornering creating more grip, this won't happen with a overly stiff lowered setup.
Your also going to be running your control arms parallel to the floor or even pointing upwards! This will ruin your roll centre making lateral forces appear greater.
It's a funny thing roll centre, If the spring rate remains the same the roll would increase as the height of the car is lowered.
Another bad point of not having your control arms at a downward angle is your camber curve is reduced. Meaning when your suspension Compresses during a corner you will loose camber angle and have less grip.
Ideally they should be facing downward so as the suspension compresses the camber angle become greater helping you to gain more grip the harder you turn.
This Is all due to having McPherson strut suspension, it doesn't like being overly lowered.
Search ,Roll centre and camber curve.