GC8 Photo Requests

[Stoffa]

Can I please have some pics of a GC8/GF8 running 215 45 R17\'s? Please list guard to wheel centre heights or how it is lowered.

Im thinking I might swap my 215 40 R17\'s to the higher profile and raise the car a little to make the ride a bit smoother and get my speedo reading closer to what it should be.

My old man is setting in and I\'ve even got a stock rear swaybar to put on for daily driving haha

[albaru]

My trusty calculator says that combo (215/45x17) will ride 14mm higher than std (205/50x16).

So... if you\'ve lowered it in any way, you\'re losing heaps of suspension travel, and then losing 14mm more.

If I was an old man, which I am, I may find that too harsh and bumpy

The same trusty (but could be wrong) calculator says that the car will be going 2.6% faster than the speedo says

[lachlan]

will measure it in a minute . its on tein ha . i like it . handles like it son rails but still has suspension travel that actually soakes up bumps . gets minor guard rub with people in the back if thrashing around the hills

[lachlan]

330 mm all round

[stira]

Mines at 330 all round and have 215x45 x 17, I think the guards at the back have been rolled slightly. I dont get any rubbing, but have not done a trip with any weight in the car just a sunday drive with the kids etc. 45s run much better than the 35s that the old 18s were. Im not sure on the km per hour accuracy, seems ok to me. Reads the same on the Apexi RSM as the speedo if that makes a difference.

[Stoffa]

Sweet, thanks, I think thats what I need

[stira]

Its on cusco zero 2 coil overs as well. my assometer also says the the 45s run better than the 40s my old cars had on them, less road noise and hard jolting on the bumps. When you buy the tyres, just ask about road noise as thats the biggest factor with performance tyres. Sometimes a cheaper quality tyre gives a better overall result imo

[Stoffa]

Im trying to talk a mate into swapping my GSD3\'s for some RE001\'s, they\'re symetrical so quiet, and still great performance.

[stira]

The shoulders wore out on my last set of gsd3s even with the proper amount air/alignment etc

[Stoffa]

mine are all good, but a factory alignment will cause shoulders to wear, I run toe set at "0" font and rear and only get camber wear from running -2* on the front

[lachlan]

0 castor will chew front shoulders . Stagea was real bad for it . White line offset bushes ftw

[Stoffa]

 lachlan said:

0 castor will chew front shoulders . Stagea was real bad for it . White line offset bushes ftw

im sure it probably will, but I was talking about zero toe, my setup runs over 5 degrees castor

[newsuba]

 Stoffa said:

Im thinking I might swap my 215 40 R17\'s to the higher profile and raise the car a little to make the ride a bit smoother and get my speedo reading closer to what it should be.

If your car originally came on 205/50-16, then a 215/40-17 is closer in rolling diameter than a 215/45-17.

205/50-16 = 611.4mm 0% error

215/40-17 = 603.8mm 1.24% error

215/45-17 = 625.3mm 2.27% error

http://marksink.com/tire_wheel_offset/tires.html

who suggested 0 castor ?

car would be undrivable !

castor keeps the car tracking straight and adds stability.

too much though and the car becomes unresponsive to directional changes.

perhaps the poster meant 0 toe ?

[Stoffa]

215 45 17\'s and 330mm front and rear, already feels nicer to drive

[newsuba]

You softy on 45\'s

;D

[Stoffa]

Yep and I love it, and even better my speedo is only 2km out when it was 10km out at 100km also it sits at 3200 at 100km when it was 3500 rpm

[newsuba]

That\'s surprising as it should have been more accurate with the 40-series.

Fair trade re: comfort.

I found that 40\'s improved the steering to the point where combined with an H- front brace, my standard STI steering rack felt almost as sharp as a quick ratio rack.

But yes, more Noise, Vibration, Harshness.

[stira]

Welcome to the "comfort" club

[Stoffa]

It is pretty smooth, I think I may try to find some dampner adjustable coilovers for the front, or maybe just get mine re-valved a bit softer and re-gassed

[stira]

Yip i have mine set on soft and it really is pretty good.