peter's canadian imola ZHP project

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04-20-2016, 05:44 AM
Vas

245 is a good amount of tire for the front. I think the most I would run would be a 235.

Car looks good though
04-20-2016, 05:47 AM
NoVAphotog

Quote:

Originally Posted by slater

new ARC-8s. 18x8.5" ET38 with 245/35/18 michelin PSS.

i love the look... but i am not happy with the feel. i think going to 245's up front was a mistake, the steering is so much more vague compared to either 225/45/17 or 225/40/18. and the straight-line stability sucks. i also think the shop that mounted them didn't do a great job balancing them. i'm running 39psi cold in all 4 tires.

going to add a 10mm spacer to the rear to test out the stability issue. that's way too huge for me, but it's what i have here. a 3mm spacer in the rear should bring the offsets back to OEM spec, and hopefully not rub (no rubbing right now). however, the 245 issue up front, not sure about yet...

with the Style 68s and 225/45/17 + 245/40/17 setup i had on before this, the car was just about perfect. now... awful.

(yes, i am a bit melodramatic ;) )

Hmm...does it matter whether the total size of the wheel/tires are different for the feel despite the width being the same? I love the way the 245/40/17s feel.
04-20-2016, 06:05 AM
slater

Quote:

Originally Posted by NoVAphotog

Hmm...does it matter whether the total size of the wheel/tires are different for the feel despite the width being the same? I love the way the 245/40/17s feel.

hmm. what pressures are you running? any straight line stability issues? what are your alignment settings?

(sorry for 20 questions...)
04-20-2016, 06:36 AM
09mageec

The flat face looks very nice!
04-20-2016, 06:44 AM
az3579

Quote:

Originally Posted by slater

hmm. what pressures are you running? any straight line stability issues? what are your alignment settings?

(sorry for 20 questions...)

What exactly do you mean by straight line stability issues? I currently run 245/35-18 all around and my car darts around like a fly every time I run over our shitty roads. Good surfaces are fine, with zero stability issues, but there's a stretch of highway I run on every day that has huge speedbumps all over the place (sounds like I'm hitting a wall head on when I go over them) and has horrible grooves and depressions/impressions that cause the car to wallow all over the place. I figured it was a Bridgestone thing as I have had only Bridgestone tires for the past couple of years...
04-20-2016, 07:07 AM
slater

Quote:

Originally Posted by az3579

What exactly do you mean by straight line stability issues? I currently run 245/35-18 all around and my car darts around like a fly every time I run over our shitty roads. Good surfaces are fine, with zero stability issues, but there's a stretch of highway I run on every day that has huge speedbumps all over the place (sounds like I'm hitting a wall head on when I go over them) and has horrible grooves and depressions/impressions that cause the car to wallow all over the place. I figured it was a Bridgestone thing as I have had only Bridgestone tires for the past couple of years...

what i mean is, the car is super darty, even on smooth stuff. if there's any kind of grooves or crown in the road, the rear end feels like i've got bad shocks or RTABs. with my staggered wheels - both michelin pilot A/S3's and michelin PSS - it does not do this.

going to increase the rear track width after lunch and go for a drive.
04-20-2016, 07:09 AM
az3579

Quote:

Originally Posted by slater

what i mean is, the car is super darty, even on smooth stuff. if there's any kind of grooves or crown in the road, the rear end feels like i've got bad shocks or RTABs. with my staggered wheels - both michelin pilot A/S3's and michelin PSS - it does not do this.

going to increase the rear track width after lunch and go for a drive.

I definitely don't have the issues you describe. The rear end feels perfectly planted for me, but the front is darty only under the conditions I described to you in my last post. On smooth roads, the front feels stable and controllable.
04-20-2016, 07:12 AM
NoVAphotog

Quote:

Originally Posted by slater

hmm. what pressures are you running? any straight line stability issues? what are your alignment settings?

(sorry for 20 questions...)

I'll post pics of the road force balance and alignment sheets from rrt in my build thread and will need to double check pressures.

But yeah...watch the video I posted from the track. I surely didn't have any straight line issues at 120+mph!!
04-20-2016, 09:41 AM
Sockethead

My tramlining/stability issues were due to my tire choice... took me about a year to figure that out. After replacing parts aligning and swapping Kristen's Dunlops, I switched from the Dunlop Star spec to Kristen's Hankooks after she went with Michelins and all my problems went away. It's interesting to note that she didn't have any issues at all with the Dunlops.

BP, You need to get rid of those Bilsteins :)
04-20-2016, 02:35 PM
az3579

Quote:

Originally Posted by Sockethead

BP, You need to get rid of those Bilsteins :)

Yeah well it looks like I'm only going to be replacing them with another set of Bilsteins... :(
My PSS' do not fit, they rub like crazy, so I'm in "emergency coilover order" mode. Ugh.

It'll have to be the PSS10's since FCP is close, so I'll get them very quickly, and they will lifetime warranty them.

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