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  1. #1
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    ACR CCB 18 wheel options revisited

    Picked up an ACR-E this weekend and like others seeking 18" wheel solutions. Read several post on Finspeed and Forgeline 18" clearing the front calipers.

    Below are images of the BC-Forged RZ39 and caliper clearance. The wheels are 18x11 42 offset. Checked the etching on the OE wheel listed @ 42.5 offset.
    There isn't a lot room left on the bottom portion of the caliper, tire weights must be located inboard or outboard side of the caliper. Will need to stick a feeler gauge to quantify the clearance.
    Front_IMG_2276.jpg

    Front_IMG_1657_a.jpg

    Anyone with ACR CCB on 18" using on track encounter other issues, excluding the scoring on the inside barrel? Is there a norm for minimum clearance in this area, accounting for material expansion and so on?

  2. #2
    Enthusiast stradman's Avatar
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    Quote Originally Posted by sharmut View Post
    Picked up an ACR-E this weekend and like others seeking 18" wheel solutions. Read several post on Finspeed and Forgeline 18" clearing the front calipers.

    Below are images of the BC-Forged RZ39 and caliper clearance. The wheels are 18x11 42 offset. Checked the etching on the OE wheel listed @ 42.5 offset.
    There isn't a lot room left on the bottom portion of the caliper, tire weights must be located inboard or outboard side of the caliper. Will need to stick a feeler gauge to quantify the clearance.
    Front_IMG_2276.jpg

    Front_IMG_1657_a.jpg

    Anyone with ACR CCB on 18" using on track encounter other issues, excluding the scoring on the inside barrel? Is there a norm for minimum clearance in this area, accounting for material expansion and so on?
    Search and ye shall find my friend!!
    https://driveviper.com/forums/thread...R-E-with-CCB-s
    https://driveviper.com/forums/thread...earance-on-ACR

  3. #3
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    Thank you, did read those threads before. Wanted to see if additional data other than scoring have surfaced since 2017. I did reach out to BC-Forged to determine how much flexibility is available in their custom order process. Inquired whether they could increase the clearance and add more material on the tire side. Something VENOM V mentioned Finspeed did for a race team, who likely committed to minimum quantity order to make it happen.

  4. #4
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    Forgeline's all the way. I had Finnspeeds and Forgelines, the Forgelines were 2 lbs lighter per wheel.
    2013 track car, 2016 ACR, 1996 GTS, 2001 RT/10, 2003 SRT/10

  5. #5
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    Lack of choices in tires for the 19 inch wheels and the fact that CCB pad and rotor replacement costs on a tracked car are just silly, I went with an ACR-E with steel brakes. You could convert your car to steel brakes with smaller rotors and then have many options.
    2017 ACR/TA in 2014 TA Header Orange, #4 of 10.
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  6. #6
    Enthusiast BlueAdder's Avatar
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    Quote Originally Posted by ViperGeorge View Post
    Lack of choices in tires for the 19 inch wheels and the fact that CCB pad and rotor replacement costs on a tracked car are just silly, I went with an ACR-E with steel brakes. You could convert your car to steel brakes with smaller rotors and then have many options.
    Smaller rotors means smaller calipers.
    Todd (VENOM V) has the 18" Forgeline on his ACR and looking at it, he's got some scoring but so do I with my stock 19", it's unavoidable.
    Actually the smaller clearance is probably a good thing, since you get more small rocks scoring your barrels but you have less chances of getting a larger rock getting stuck and making a big ass grove.

    I'm going to get a set of Forgeline pretty soon and I'll go for the 18".
    2018 Challenger T/A 392. 2016 Viper ACR-E Competition Blue
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  7. #7
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    Peter wants a set of 18's and I'd probably pull the trigger on a set if the timing/price was great. Groupbuy?

  8. #8
    Enthusiast Dr.Ron's Avatar
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    I use 18" Forgestars from Nineball. No issues. Slight scoring likely from a rock caught on the fronts.
    Current:2014 GTS w/ TA 1.0 Aero,18 speaker HK, CF interior accents,SW's,Bone stock 11.44@127.86, Past:2011 Carbon Edition C6Z06, 2009 C6Z06-Bone stock on drag radials-10.75@128.19, 2006 C6Z06-Bone stock-11.242@122.38, 10.87@127 on DR's,2003 C5Z06-Bolt ons 11.214@122.30

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    I've been running my 18X12 front and 18X13 rears for about 2 years heavy track usage. The fronts are scored, but not deep. We sent pics to Forgeline and they said it was cosmetic only and wasn't compromising the wheel integrity.
    2013 track car, 2016 ACR, 1996 GTS, 2001 RT/10, 2003 SRT/10

  10. #10
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    Thanks everyone, will give the RZ39 try in September.

  11. #11
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    Quote Originally Posted by sharmut View Post
    Thanks everyone, will give the RZ39 try in September.
    Plan on switching to iron rotors too? A lot of the ACR-E guys who track often ended up switching.

  12. #12
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    Quote Originally Posted by catwood View Post
    Peter wants a set of 18's and I'd probably pull the trigger on a set if the timing/price was great. Groupbuy?
    skip this as some of those needing them have bought.

  13. #13
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    Quote Originally Posted by serpent View Post
    Plan on switching to iron rotors too? A lot of the ACR-E guys who track often ended up switching.
    Not yet. The car came with Racingbrake sintered pads that I want to try first. A set of GiroDisc and ST43 pads is sitting on the shelf.

    Received additional feedback from BC-forged, who indicated they have plenty of experience with C6 ZR1 and C7 Z06 with CCB running their 18" wheels with ~2-2.5mm clearance without issue, other than the barrel scoring.

    May have a lead on a single set of RS43 18x11(50 offset) & 18x13(60 offset) for the Viper, PM if interested.
    Last edited by sharmut; 08-28-2018 at 11:08 PM.

  14. #14
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    Quote Originally Posted by catwood View Post
    Peter wants a set of 18's and I'd probably pull the trigger on a set if the timing/price was great. Groupbuy?
    I may consider that. Let me know what models, sizes, etc.

  15. #15
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    I would be interested in facilitating a group buy on Forgeline wheels for my Viper family. Ideally, I'd need to see at least 4 sets sold, to make it work.

    Also, I'd be extremely careful about running just any brand or style of wheel on the ACR-E. You will want to be sure that brand does the proper engineering for the design. Forgeline wheels are very strong, but you might be surprised to know that they only recommend ONE style of theirs, for the ACR-E. That would be the GTD1-Viper design. Cars with aero have much higher side-loading than cars without, and some of the other wheels on the market do not have that design strength.

    https://forgeline.com/wheel/gtd1-viper/

    Tony

    Viper-GTD1-acr1.gifschen2.jpgGTD1-Viper7.jpg30470374391_e4b5cf6924_b.jpgroy1.jpg
    Last edited by Nine Ball; 08-29-2018 at 08:03 AM.
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  16. #16
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    what would a group buy price be?
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  17. #17
    Enthusiast stradman's Avatar
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    Just bought 2 sets of Forgelines myself!

  18. #18
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    Quote Originally Posted by Nine Ball View Post
    I would be interested in facilitating a group buy on Forgeline wheels for my Viper family. Ideally, I'd need to see at least 4 sets sold, to make it work.

    Also, I'd be extremely careful about running just any brand or style of wheel on the ACR-E. You will want to be sure that brand does the proper engineering for the design. Forgeline wheels are very strong, but you might be surprised to know that they only recommend ONE style of theirs, for the ACR-E. That would be the GTD1-Viper design. Cars with aero have much higher side-loading than cars without, and some of the other wheels on the market do not have that design strength.

    Tony
    I'd be interested in the details when known.

  19. #19
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    Private Messages sent to those who inquired. Thanks!
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    2014 Viper TA white #10/33 | 2013 Viper - 10.97 @ 127 mph - First 10 second Gen 5 (sold)
    2006 Viper - 9.48 @ 154 mph - 209 mph 1 mile - 187 mph 1/2-mile
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  20. #20
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    Are yall going with a 18front/19 rear? or 19/19? Tony, i'd be interested as well.

  21. #21
    Enthusiast BlueAdder's Avatar
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    I might be in the market for a set of 18/19 as well. Just not sure about the timeline, gotta take care of other stuff as well.
    2018 Challenger T/A 392. 2016 Viper ACR-E Competition Blue
    2005 Lotus Elise (Track Car). 2004 RAM 1500 Rumble Bee

  22. #22
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    I'm interested as well

  23. #23
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    I'm interested as well please.

  24. #24
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    Always love the GTD1-Viper design. @Nine Ball, had a long discussion with BC-Forged regarding my wheel choice, they claim 2600lbs official load ratings, however have unofficially seem 3000lbs results on the RZ39. Of course it's the usual high threadwear values used during test, I assumed 1/2 the value with slicks or alike.

  25. #25
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    Quote Originally Posted by sharmut View Post
    Always love the GTD1-Viper design. @Nine Ball, had a long discussion with BC-Forged regarding my wheel choice, they claim 2600lbs official load ratings, however have unofficially seem 3000lbs results on the RZ39. Of course it's the usual high threadwear values used during test, I assumed 1/2 the value with slicks or alike.
    What do the wheels weigh? What sizes?
    2013 track car, 2016 ACR, 1996 GTS, 2001 RT/10, 2003 SRT/10


 
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