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[L99CAMA2011]

Originally Posted by AG1LE

I used the OEM Z/28 wheels with Trofeo R 305s on the track for the first time last week at Hallett.

Installed them at the track after running a few sessions with the OEM 1LE wheels and GY F1 tires (285 front, 305 rear). Incredible additional traction and corner speeds with the Z/28 wheels, easily cutting 3-4 seconds from one session to the next.

Here are a few pictures that show how they fit. As expected, large fender gap and they stick out quite a bit. I don't think it looks bad, but these won't be my street tires, only for track. My ride height is set at 660 mm on all 4 corners (from lower lip of 20" 1LE wheel, through center of wheel, to top of fender well).

I have the Z/28 center caps, but they're still packed up somewhere in a box in my garage (we recently moved).

Just so you know. You won't feel the full effect of the 19" wheels until after about a 100 miles or so. When initially switching from 20s to 19s my car goes like whooa what happened here then later oh ok. Then the true advantage really shows it face. Car becomes much quicker then.

[X25]

Judging from the pics, looks like you need more camber? Did you ever get around to it? I'd imagine at least -2.5 fronts, and perhaps <-2 rear camber could work out great! They would also tuck in the tires a bit more. I ended up getting the Z/28 fender flares, since wide sticky tires (Trofeo Rs) would eventually sandblast the paint.

[X25]

I'm confused, don't you have camber plates already? Are you too high by any chance? Perhaps you could get a lot more if you lower it a bit. Or perhaps you have too much caster, limiting your camber? If something is wrong (i.e. it must have allowed more), check if it allows a lot more on one side, and less on the other. If so, at least on Miatas, loosening and re-centering subframe helps. Let us know!

You have a very nice, select list of parts by the way; very cool

[X25]

Originally Posted by AG1LE

I have the camber plates (Moreno) maxed out. I don't know enough about caster/camber trade-off to know whether my caster (JPSS lock plates) is limiting my camber. May play with that next time. I'm getting the same limited camber on both sides.

Yeah, you should take a look. I don't even have plates, and I think I have more camber. Did you measure your ride height or suspension height? You could also try loosening everything and pulling them outwards

[X25]

I don't measure it the same way, so I don't know what it means; what was the height when stock? Something is wrong. You should not trash you $2300 tires with this setup like that.

What's puzzling me is that I just have simple $30 aftermarket camber bolts, and I can do -2.4 or so if I recall correctly. With the plate, you should get amazing numbers. Does the camber plate extend the length of the suspension? I'm trying to understand if you're at 1" lower than stock (which I think is the sweet spot). Is the original camber bolt location also maxed out besides the plate?

I wouldn't go to track again before getting this fixed. R compound tires' softest part is usually the outer section, and I doubt if it could take this abuse much longer.

[X25]

Originally Posted by AG1LE

I have ride height set to 660 mm on all four corners (with the OEM 1LE wheels), measured from the lower lip of the wheel to the top of the fender well

I measure from center of the hub to fender lip, which is independent of wheel/tire, and only measures the suspension. This is the way I've seen in other forums, too, but not this one : )

[X25]

Originally Posted by AG1LE

Like I said, figuring this out is the next priority. No, it doesn't make sense, otherwise I would have fixed it by now.

Alright I'll shut up; keep us posted!

[JusticePete]

What is your negative camber value now?

[JusticePete]

Originally Posted by AG1LE

-1.7

Are you maxed out negative at the knuckle with the adjustment in the strut clevis slot?

[JusticePete]

Let's look at the camber plate. Is it maxed out for - camber of split between caster and camber?

[JusticePete]

You should be able to get close to 2 degrees out of the knuckle and 1 out of the plate for a total of 3. You already know this.

I am thinking the clevis on the Penske coilover may be a a bit shorter than stock. I may be able to get measurements for both.

To answer your question about JPSS SAI plates, they deliver 3 degrees or two more than you currently have. I have them in stock and ready to ship.

[Sales @ CAI Inc]

Wow Nice build!

[Superman09]

What wheels and tires do you have back there? And is there three back there and one in the trunk?

Sent from my campfire using smoke signals

[Aequitas & Veritas]

Yeah at least you can get enough room behind your seat to shove them back there! No such luck in the GTR :(

How do you like using Harry's? I tried using Track Addict but my Ipod kept dying/my external GPS wasn't staying connected for some reason...