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wide track suspension for a GC8

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Old 28 September 2017, 02:12 AM   #1
sparks_c/s
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Default wide track suspension for a GC8

What coilovers or otherwise are people using for the widetrack set up in a gc8?
I'm not too fussed on coilovers if there's an alternative as its just a road car with track day fun in mind.
I've been told by the parts supplier that I have all the gear I need apart from struts, but there's one thing that I can get my head around.
Surely if I have the whole widetrack set up from an 05+ including d/shafts & hubs, I'm going to need the wider front & rear lower arms also to match?


Can someone help a little with my education?
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Old 28 September 2017, 10:40 AM   #2
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Originally Posted by sparks_c/s View Post
What coilovers or otherwise are people using for the widetrack set up in a gc8?
I'm not too fussed on coilovers if there's an alternative as its just a road car with track day fun in mind.
I've been told by the parts supplier that I have all the gear I need apart from struts, but there's one thing that I can get my head around.
Surely if I have the whole widetrack set up from an 05+ including d/shafts & hubs, I'm going to need the wider front & rear lower arms also to match?


Can someone help a little with my education?
That's correct, the front lower arms and rear lateral link arms are shorter on a non widetrack car.
The front and rear subframes are also slightly different
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Old 29 September 2017, 03:45 PM   #3
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I am biased toward struts on a road car, but.....

If you're keeping the gc front subframe? You'll need to press the shorter gc front bushes into the gd sti arms. You could use a gc urethane bushing instead, but, imo, pivot points are better in rubber, on a road car.
If you swap to a gd front subframe, you can use gd arms/bushes.
Source a front bar that fits the subframe and allows for the wider track.

Then you'll need to do all/some of:
Roll the arches, run excessive (for road) camber, increase the wheel et, find a tyre that actually measures its stated width and stiff springing/ride height adjustment (coilovers) - just to stop the tyre hitting the arch. "Any suspension will work, if you don't let it" (Colin Chapman).

I don't know why you'd want to increase the rear track, on a gc road car? If you did, you've got even more arch contact problems, than you'll have at the front.

I'm assuming you want a compliant, road-going, suspension?
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Old 09 October 2017, 12:02 AM   #4
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Originally Posted by gazney101 View Post
That's correct, the front lower arms and rear lateral link arms are shorter on a non widetrack car.
The front and rear subframes are also slightly different
If you change the bush in the front alloy arm to a pre widetrack bush then the front subframe does not need to be changed that's the only difference apart from the Hawk subframes being a bit stiffer. Same with rear they are just a bit stronger fitment of the suspension components is the same.
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Old 09 October 2017, 12:03 AM   #5
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Oops just read the reply above
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