New Rubber Rcommends

[rkreigh]

Originally Posted by Jagdpanzer

Dom,
I meant the upper forward trailing arm pivot bolt head on both sides:



This photo shows where the inner wheel well liners are trimmed:



Michelin 345/30-19 Pilot SS tires measure a full 13.5" from sidewall to sidewall when mouted on 12" rims:



And fill out the available wheel well space very nicely:

those fikse are just the bomb. and phil keeps them cleaner than most.

they look fantastic.

[XfireZ51]

These things are MASSIVE!

[XfireZ51]

Had discussion w Pete on possibly massaging the cylinder heads some more, but our concensus was that motor feels pretty strong right now. Bang for the buck not as strong as maybe looking in other areas. With updating my Invos to
Mich SS, I started looking into the whole rotational mass thing. Seems that this is an area that would yield better results in terms of ROI. The Michelins will add a total of 10lbs over current tires. Also, the Z06 brakes are large w front rotors weighing in at 28lbs. ea./rears 20lbs. ea.
Been researching the alternative rotors and have found two that look up to the task. The preferred rotors by the Z06 crowd is the Coleman 2pc. rotors built by Performance AFX. These rotors weigh 17F/15R. They basically reduce rotating mass by 30lbs overall w 20lbs coming off the front end. Rule of thumb is 1lb ~1hp. On the dyno that should mean about an 8-10hp pickup since the front wheels aren't going anywhere.
However, the mitigating factor is that the new rear tires will be ADDING a total of 6lbs. The rear weight loss will net out at 4lbs. The net weight loss on the front after new tires will be 16lbs for an overall net weight reduction of 20lbs.
Pickup of 20hp to the wheels would be huge. Other benefits are quicker steering and shorter braking distances.

Front Rotors(pic) and the rears are made to accomodate the Z06 eBrake.

[XfireZ51]

OK Phil. You were right. Just mounted the 345s and the top trailing arm bolt does, in fact, interfere with the tire sidewall.
So I'll need to pull them back off and trim the bolt head as illustrated in your pic. I'm hoping that will be enough. Do you have an idea of the celarance you have once the bolt head is shaved. What would be great is to find a Torx head bolt w a rounded head similar in shape to the cam cover bolts.
I don't see any other areas of interference. We'll see once I am able to get underway if there are issues w the inner wheel well. Probably because I can see where the 325s grooved the wheel well a bit.




Any idea how much lip you left on the bolt head? BTW, the tires REALLY fill out the wheel well. Side wall however is quite flush with fender line but not past it.

[XfireZ51]

Phil,

Rounded the bolt head. Looks like I can fit the tip end of a screwdriver between sidewall and bolt head between 4-7mm.

[Jagdpanzer]

Dom,
Sounds like you got it. Make sure the rubber snubers are in good condition. take a Sharpy marker to the bolt heads you shaved then give it a good road test to make sure everything clears. You damn sure don't want to scar up the inner side wall of such fine tires.

[XfireZ51]

Originally Posted by Jagdpanzer

Dom,
Sounds like you got it. Make sure the rubber snubers are in good condition. take a Sharpy marker to the bolt heads you shaved then give it a good road test to make sure everything clears. You damn sure don't want to scar up the inner side wall of such fine tires.

My bolt head doesn't look as wonderfully machined as yours. And yes the last thing I want is a sidewall coming apart at any speed. Damn those tires are HUGE, HUGE! Somebody have a driveway they need paved?

[XfireZ51]

Got the wheels back on after having modded the bolt head for clearance.



They are W I D E. 345s are about the limit.


They fill the wheel well