Any track / SCCA folks out there with a C55 have any recommendations on a track rim? Im looking for a set of 18" rims that will support staggered 225/40/zr18 & 245/35/r18 hoosier A6 track tires.

Currently I have Lorinser LM5 19" and want to have a second set of rims for this years autocross. Not looking for spacers and incorrect offset ; maybe stock wheels? Anyone know the weight on them?

 

I'm pretty sure that I read in a thread that one of the only members who regularly tracks his C55 uses the stock wheels when he does.

 

18 inch Renntech monolites! very light wheel.... 18lbs??

I cant help but notice the crazy C55 you have! tell us about it.

 

I've only used the stock AMG Style IV rims when I have tracked my C55, so I can't tell you how other rims would feel. Never taken the C55 on an autocross, but I do enjoy lapping days on a track/circuit.

The stock rims are heavy. I don't have the exact weights, but they are definitely not on the light side.

It is very likely that light weight rims like the Renntech Monolites would improve acceleration and handling given the decrease in unsprung weight.

Also, have you considered a "square" tire setup with the same size tires/rims front and rear? This allows for rotation of tires front to rear to even out tire wear, as my own experience has shown me that the outer shoulders of the front tires will wear much quicker than your the rears. That's what I plan to do with my 135i this season......get really light weight 17" rims with a square setup to minimize unsprung weight and to allow for tire rotation.

With a supercharged kleeman C55, my guess is that you will have more fun on a road circuit/track than a slow speed autocross. A stock C55 is already not a lightweight, and the Kleeman blower probably worsens the weight distrubtion......which means very slow tight corners will not be the car's forte.....rather, I find high speed tracks with fast sweeping corners is where the C55 REALLY shines. Having said this, I've only tracked with street tires, so having R compounds may really make a difference in those slow tight corners or in an autocross situation.

 

i believe OZ makes a pretty light 18" wheel

 

Yes, OZ Racing makes the Ultraleggera (in silver or black), which comes in 18" size with the 5 x 112 bolt pattern necessary for the C55. The offset is 35mm, which according to the OZ website, should fit the C55. The rim is under 20lbs in weight. Don't know the details about whether a centering ring, different length bolts or spacers are required or not.

 

Ultraleggera 18x8 ET35. fits the C55 or any other W203 perfectly. they're 18lbs. no spacers needed.

or you can run BBS RE like mine 18x8 18x9...20lbs each.

 

Thanks for the detailed response PC Valk. The type-R compound will do wonders for the handling, but will all come down to who is running SMII. With the modifications I am obviously out of Stock Classes in Solo II, which is not so bad anyway.

Last year SCCA moved the C32 AMG and C55 AMG into A-Stock from F-Stock...which is quite frankly insane... A stock has cars like M-Roasters, S2000's and C5 Vettes. While on a straight, we are more than capable in a stock capacity around descending turns, 180's and sharp 90 degree (tight) areas, even with race quality tires, there is no competition against a S2000.

SMII is street modified, which allows for Springs, Sways, Brakes, Forced Induction ...pretty much performance enhancing on top of stock setups.

I could be setup against a 600hp supra with full coilover, to a V8 Monster Miata... Big down force wings and extreme weight reduction puts you into other classes such as E-Mod

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Responding to hooleyboy, I recently purchased the car with most all of the listed enhancements already put on the car. As soon as it warms up here I am going to take some pictures and offer a better glimpse at what the car has to offer. Provided it does not snow tomorrow I was planning to take it up to Chicago @ the meet there and get some fresh dyno numbers on it.

The car has 50,000 miles on it now, most of the work was completed @ 18,000 miles.

The dyno sheets that were provided to me show 537 RWHP - 554 RWTQ, these were completed @ 20k miles. I will see what 30k miles have done to the numbers... obviously i will be posting the results as soon as i get them

The previous owner said he only had it at the track one time and it posted a 12.097 @ 118MPH with a 2.05 60' - Michelin Pilot SP2; 1/4 in AZ

Again, I plan hitting Gateway International Speedway in March and see what I can accomplish, on the Hoosiers though

 

Wow, those are some beastly numbers, although those track results definitely do not do it justice.

I would love to see what that car can do in capable hands at the strip and on a road course.

 

C55 is F Stock, not A stock... I actually just got some feedback from Doug Gill @ SCCA on this earlier today:

 

Is this that Kleemann car that went on ebay for 22k???

 

Nice ride!
Shameless plug....
I have a set of 18's that will fit for sale. They weigh 25lbs but light on the wallet.

 

Yes, actually it was