Tommy

Does anybody know if the P1 suspension settings are the same as Prodrive settings? My local tyre place can do 4 wheel alignment, and has P1 as one of the standard setups on the machine.

Darren Thompson

he P1 and Prodrive settings are different as my dealer found out when setting mine up. They ended up contacting Mike Wood at Prodrive for the settings and all I can say is a big thanks to Mike and Monks Heath as the car is the best it has ever been.

Darren.

Tommy

Thanks, I'll give them the measurements

Tom

HAPPY

Settings should be 1mm toe in on each wheel at the front and 2mm at
the rear.
Front camber should be 1.25 degrees negative.

Ga22ar

Are those settings the same with the bumpsteer mod added ??

Lars

No prodrive setting is not used together with bumbsteering.
Prodrive setting compensate for the standard Subaru bumbsteering (too out when the front springs are compressed)
When you remove bumpsteering, you no longer need to compensate with too inn, you can use a too inn of zero.

Lars

Ga22ar

so what are the geometry settings with the bumpsteer mod ??

Lars

what are the geometry settings with the bumpsteer mod ?? Depend how you want your car to drive. When you do the Bumbsteering adjustment you have changed the standard set up and you need to find out how you want you car to drive.
Lars

Andy Tang

iTrader: (3)

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by Ga22ar:
<B>so what are the geometry settings with the bumpsteer mod ??

[/quote]

Ga22ar,

Assuming you had the bumpsteer modifcation done at Powerstation, why not give them a call and find out?

Andy

WREXY

Forgive me for my ignorance, but are those measurements quoted by Happy useful for a MY00 with standard suspension and standard 16 inch wheels? I take it they're the P1 settings. If the answer is no, then what are the prodrive settings I could get done?

Kind Regards
WREXY.

Ga22ar

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by Andy Tang:
<B> Ga22ar,

Assuming you had the bumpsteer modifcation done at Powerstation, why not give them a call and find out?

Andy[/quote]

I bought the car with the mod on already, would it be cheeky to phone up with reg no and see if they had the settings on record ?

Cheers

WREXY

Would anyone be kind enough to answer my question please? It's posted above.

WREXY.

WREXY

No one know then?

HAPPY

should be somebody on here that knows!!

from memory i had my uk99 with 16's and so2pp's at

0.75 deg neg camber on front, rear not adjustable
1mm toe in all round

not full prodrive setting as per RB5 but a very good compromise for reasonable tyre life

pete

WREXY

Thanks very much for that Pete.

Regards,
WREXY.

Bob Rawle

Prodrive settings as per Micheldever Tyres are

Max negative camber front and rear but must be equal on both sides (so if one side is -0.8 and one side -1.5 then its got to be -0.8 per side)

Total toe in fron 1.0mm
Total toe in rear 1.0 mm

(about 0.09 deg per side gives that)

My personal choice (if possible on an individual car) would be -1.5 deg negative each corner, 0.05 deg toe in per wheel on front and 0.03 deg toe in per wheel on rear.

However I run that with uprated roll bars, solid rear links and anti-lift fitted so the car feels like a go cart and turn is amazing for STi with standard suspension.

Uk cars should definately benefit from the above settings and anti-lift without the roll bar changes.

BTW the Type R two door STi is actaully very tail happy as standard, the above settings will make it even more so.

Tyre pressure differential front to rear is also critical for best balance so its worth experimenting in that area once geometry is sorted.

I do up to 30,000 miles per year and don't suffer from advers tyre wear although only about 30% of those miles are motorway ones.

speedster

Just had MY98 in for traking change to prodrive setting. But the garage said the front camber could only be adjusted to -0.3° on the left and -0.9° on the drivers side. Instead on -1.25° , so they adjusted it to -0.3° both sides.

Why can't -1.25° be reached? Is something worn? All the suspension bushed checked out ok.

rovo

I have got a similar setup for MY99 as HAPPY/pete. 16" with S02 PP (previously Goodyear Eagle F1) and anti lift kit, front: -0,75 deg camber and 1 mm toe in, rear: -1,2 deg camber and 1 mm toe in. I also found that the car was very sensitive to tire pressures. I use 2,5 bar (36-37 psi)front and 2,0 bar (29 psi) rear. This setup gives me good handling (almost no understeer) and an even tire wear. If you let the tire pressure of the front tires drop to 2,3 bar then I already noticed an increase in understeer with both the Eagles F1 and S02 PP. As a go-carter for over 10 years I quite like my current setup and it also saves your tires because of the lesser understeer.

rovo

Something I forgot:

by accident the setup was first 1 mm of toe out front and rear. With this you end up with a car that feels very nervous in long fast turns.

ric

Bob,

I have a MY98.

Unfortunately the bumpsteer mod isn't available here in Switzerland.

I have lowered Apex springs that lower the car by 40mm. Together with these springs I fitted Koni adjustable dampers.

After fitting 17" rims the car is very good to drive but understeer is still there, I don't like this.

Geometry settings are as follows:

- 1° neg front
- 1,25° neg rear

0.09° in each corner.

Do you think my car could profit from stiffer roll bars? Can they eliminate the understeer. Should they be fitted with new roll bar links? What about the anti lift kit?

greetings
ric

psyg

Settings AFTER the bumpsteer-mod, by Powerstation, on my scooby (my99 with Anti-Lift-Kit):

Rear:
toe left:: +0°03'
toe right: +0°04'
total rear-toe: +0°07'

Front:
toe left:: +0°04'
toe right: +0°04'
total front-toe: +0°08'

camber:
left:: -1°38'
right: -1°40'

Also a question:
Who knows the conversion from degrees to mm's?
I understand from Bob Rawls reply that 0°09' is about 0.5 mm,
so 0.04 deg is about 0.2 - 0.25mm??

Geert

rovo

Hi Geert,

if you want to have a toe in of 1 mm you will have a toe in per wheel of 0.5 mm. For the standard 16 inch wheels you have a diameter of 16 times 25.4 mm = 406.4 mm. To calculate the angle of the wheel you have to take the arc tangens of 0.5 divided by 406.4 this is 0.0705 degrees and in minutes 4.2 ( 0°04'). The difference for 17 inch wheels (depending if the 1 mm of toe in was defined for 16 or 17 inch wheels!) is negligible.