Yes within a .25" of stock. Many may switch to light weight wheels such as CCW, but they have to be within a .25" of factory diameter, width and offset. You can stuff as wide as tires on them as you can fit!

13.4 WHEELS
Any type wheel may be used provided it complies with the following: it
is the same width and diameter as standard, and as installed (including
wheel spacers if applicable) it does not have an offset more than
+/- 0.25 inch from a standard wheel for the car. The resultant change in track dimensions is allowed

Lowering can only be done on factory bolts, but will help.

Past the Cat exhaust is free (can be changed)... Going with a Z06 TI muffler system will save on weight.

13.10 ENGINE AND DRIVE TRAIN
E. Any part of the exhaust system beyond (downstream from) the header/manifold or catalytic converter, if so equipped, may be substituted or removed provided the system meets the requirements of 3.5 and 3.3.3.B.15. Stainless steel heat exchangers are permitted only if the physical dimensions and confi guration remain unchanged.
Modifi cations of any type, including additions to or removal of, the
catalytic converters, thermal reactors, or any other pollution control
devices in the exhaust system are not allowed and the system must be operable. Replacement catalytic converters must be OE if the
vehicle has not exceeded the warranty period as mandated by the
EPA. Converters must be of the same type and size and used in the
same location as the original equipment converter(s). This does not
allow for a high performance unit. If the vehicle has exceeded the
warranty period, replacement catalytic converters must be OE-type
as per Section 13.0.

 

Only the offset can deviate from "standard" (factory dimension) by 0.25". Custom wheels built with a width 1/4" wider than factory dimension isn't allowed.

 

I guess the thing is, that right now sam's team has the best chance to winning nats, he has a consistent driver and is winning the majority of events....on 295's. I'm not saying 285's are a bad tire. I just dont think that there is enough people comparing them.

I think the only way this will be solved is next year, like you siad. when people start switching to the 295's and we get a comparrison, or even better if anyone has a local guy running the 295's ask to trade tires for the day and see what you think.

 

 

Nice trailer. Where did you get it and how much do they roughly run?

 

I have been running the A6 295 Hoosiers in the rear for the last 3+ years in my 2000 FRC. I had a local competitor start out running the 285's in the rear of his 2003 C5 . During a test and tune I let him run my 295's in place of his. Next event he showed up with the 295's on. HTH

Also, for the FRC, the 1999 had a smaller rear bar than the 2000 so keep that in mind when looking at cars. The rear sway bar links for 99 and 00 were plastic and the 2001 and up were changed to metal. I went to order some more end links when mine broke and was told they were superseded by the newer metal links. So be sure to get the updated sheet if you order them.

 

It's a Sloan Quick-Load trailer and they're around $3-3.5k now.

 

Actually, I won the Toledo Pro on 295's... My car is the one everyone is talking about with the Stranoparts setup on it. By the way, welcome to A stock! We can sure use some more folks here! I am running exactly what Sam told you, including the Z06 front bar. The car is very neutral, and is an absolute blast to drive! He should have everything you need available at stranoparts.com
As far as wheels go, I picked up a few sets of factory Magnesium wheels that needed paint work right here on the forums at a great price. They are super light (within a pound of CCW's at less than 1/4 the price) or you could get a set of thin spokes (+ about another pound per wheel as I understand it).
If you have any other questions, feel free to pm me. I'll try to keep an eye on the thread to see how you make out!

Tony Savini

 

I was hoping to get to co-drive Tony's car in the Finale this year and switch the rears to the 285s when I ran. That way we could have gotten some comparative data and he could have used them too on Sunday if he wanted to, in the very unlikely event I was faster on day one.

 

I also did test on 285's at a local Hershey event. Mounted on the exact same wheels, the width is almost identical while the 285 is clearly shorter. I'm thinking the best answer might be to have both mounted up and run whatever you need depending on the course. Bearing in mind that the car will be a little less forgiving on the 285's (less sidewall, shorter gear). At least that was my experience. At another recent local Warminster event, where a local SS competitor in a C5 who regularly trophys at national events was just getting to the rev limiter in his car, I never touched it and put over a second on SS. Gearing? I'm sure it didn't hurt. This was a fast course, but I'm thinking with all that room in Lincoln, those will be fast courses as well.
What kind of 60' times were you getting on the 285's? I cut some low 2.0's in Toledo on 295's. Just curious. Lincoln should be similar grip.

 

Consistently in the 1.9's but I have a softer rear spring than you do. In the Z I'm always around 2.1 on concrete.

Also our second gear is taller so not hitting the limiter when the Z06s do is no surprise. In the Z with A6s I hit it at about 68-69mph. The coupe gets to 70-72 before it pops. With your taller tires you probably get 1-2 mph more.

Did you want me to bring the mounted 285s in case you want to use them at Nationals? I have no use for them, they have about 30 runs on them.

 

How are you on the limiter at 68? We can do around 72. Confirmed with GPS

 

You really want to keep an eye on the early thin spoke wheels. The car I was driving early in the season had one crack - it is now on the version 2 thin spokes.

 

Anyone want to chime in on brake setups and tire pressure? also do the z06 metal endlinks work for the stock bar in the rear?

 

You can't change endlinks in the rear, so whatever you have is what you get.

 

thanks. are people running any different types of pads front to rear to make a basic bias? or pretty much hps+ all around?

 

I am, as of recently, at the suggestion of Pat Salerno. Stock front, HP+ rear.

The HP+ dust like mad though...it's terrible.

 

Yeah, what can ya do, atleast no dust in the front? lol thanks for your help!

 

Braided or stock lines?

 

Haven't read the rulebook in a while...steel lines legal in stock class?