What if I told you...

tt335ci03cobra

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More like 20#. The CC rotors on the the Ford GT and ZR1 each weigh 13.5#.

Even better. I didn’t want to go too crazy. Someone said 70lbs (35 each)... I said no ****ing way that’s right in my head but didn’t bother to call them out.
 

GTSpartan

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The viper acr would be dramatically faster with just lighter wheels and tires. Put a 335 mpsc2 out back with a carbon wheel... only issue I can deduce is the 2000lbs of downforce in combination with the ~1500lbs of rear end may be too much load for an mpsc2. Otherwise I don’t understand the play call to run the kumho unless they were considering replacement cost. Obviously they wear so goddamned fast that even if it’s half price of the Michelin, it’s still a net loss. The Michelin’s seem to last pretty well.

This will probably start a $hit storm, but serious track cars don’t run carbon wheels. They could have put those on the ACR, but made a deliberate decision not to.

Look no further than Ford’s own $1 million ++ no hold barred, balls-to the wall, non-street legal Ford GT MKII track car. They could have put any combination of wheel/tire/brake combo, and chose to dump the street GT’s carbon wheels for a heavier set of aluminum.
 

Voltwings

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I go through a set of Hoosiers/weekend on my ACR for $1800 a set.

My car weighs 3300lbs lol

Doesn't the ACR make give or take 1500 lbs of downforce? Obviously not getting as much lateral loading since that's "Straight down" weight, but I think the argument is still there.

So why did the Las Vegas media day cars have no issue? Lapped all day by novices just hammering brakes.

Small track too. 140-30mph range for literally 8 hours.

I could see the heavier wheel handling pack cars eating up tire though.

Unsprung weight and under utilized contact patch eat up tire. Flat smooth contact patches without crazy camber as well as light easily rotated wheels dramatically reduce tire wear.

The viper acr would be dramatically faster with just lighter wheels and tires. Put a 335 mpsc2 out back with a carbon wheel... only issue I can deduce is the 2000lbs of downforce in combination with the ~1500lbs of rear end may be too much load for an mpsc2. Otherwise I don’t understand the play call to run the kumho unless they were considering replacement cost. Obviously they wear so goddamned fast that even if it’s half price of the Michelin, it’s still a net loss. The Michelin’s seem to last pretty well.

I've been doing track days for years and am not going to put facts and experience against you wanting to sound smart. Very few cars will kill tires in a day, but hot lap a miata and a mustang and let me know who runs out of tire first. My comment was not a stab at the GT500, it's a stab at weight in general, which the GT500 happens to have.
 

PIPO

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They're not even through half the build lol


Good point. I was just comparing it to the demon. Although different ordering process. Dodge forced the dealers to sell or buy their own allocation within 90 days of the bank order opening date.
 

13COBRA

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Doesn't the ACR make give or take 1500 lbs of downforce? Obviously not getting as much lateral loading since that's "Straight down" weight, but I think the argument is still there.



I've been doing track days for years and am not going to put facts and experience against you wanting to sound smart. Very few cars will kill tires in a day, but hot lap a miata and a mustang and let me know who runs out of tire first. My comment was not a stab at the GT500, it's a stab at weight in general, which the GT500 happens to have.

My car does 1100lbs at 150mph. I hit 135-143mph on my home track for about 2.5 seconds a lap. Other than that, it's 45-95mph...so less than 500 lbs.

But yes I get where you're coming from.
 

tones_RS3

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Who really needs the trunk spare kit, owner manual, and radiator? The car has 11 other coolers. The radiator is obviously a day late and a buck short at this point.
I don't think these cars come with a spare in the trunk. My previous RS3 and current did not. I maybe be wrong, but maybe someone that knows 100% can chime in.

By the way,...........what's an "owner's manual"?? lol
 

tt335ci03cobra

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Doesn't the ACR make give or take 1500 lbs of downforce? Obviously not getting as much lateral loading since that's "Straight down" weight, but I think the argument is still there.



I've been doing track days for years and am not going to put facts and experience against you wanting to sound smart. Very few cars will kill tires in a day, but hot lap a miata and a mustang and let me know who runs out of tire first. My comment was not a stab at the GT500, it's a stab at weight in general, which the GT500 happens to have.

It’s my wanting to be a cool kid and dunk on you old man, da na-da na! But you know if you drop the pretentious line that gt350r’s wear their tires less quickly than the average car on mpsc2’s if you track day a lot with those cars. Lighter wheel is not going to wear a tire as fast. A fact that your track days verifies.


They do not, they come with the inflation kit.

So just take out the radiator. Who needs it.
 

tt335ci03cobra

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This will probably start a $hit storm, but serious track cars don’t run carbon wheels. They could have put those on the ACR, but made a deliberate decision not to.

Look no further than Ford’s own $1 million ++ no hold barred, balls-to the wall, non-street legal Ford GT MKII track car. They could have put any combination of wheel/tire/brake combo, and chose to dump the street GT’s carbon wheels for a heavier set of aluminum.

Why? Real track cars crack wheels. The carbon wheel in theory should stand up better by leaps and bounds than aluminum.

I think they chose the aluminum wheel because it’s probably a lot faster/easier to produce. Race teams are buying those cars. They can’t run a wheel that is 180-365 days back ordered.
 

GTSpartan

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Why? Real track cars crack wheels. The carbon wheel in theory should stand up better by leaps and bounds than aluminum.

I think they chose the aluminum wheel because it’s probably a lot faster/easier to produce. Race teams are buying those cars. They can’t run a wheel that is 180-365 days back ordered.

The car runs >$1M.......faster and easier is certainly not a priority for this type of car, so I am not sure I agree with your logic. It’s 100% bespoke. Everything else is CF on the car, so including Cf wheels would only follow that theme. That is unless there is a valid reason for it..........

Ford’s only making 45 examples of the MKII and exactly zero will ever see any official racing. Race teams aren’t buying these car. They are toys for the ultra wealthy.

Carbon wheels just don’t stand up to the abuses of serious tracking.
 

Voltwings

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It’s my wanting to be a cool kid and dunk on you old man, da na-da na! But you know if you drop the pretentious line that gt350r’s wear their tires less quickly than the average car on mpsc2’s if you track day a lot with those cars. Lighter wheel is not going to wear a tire as fast. A fact that your track days verifies.

So just take out the radiator. Who needs it.

I'm 29.

Why? Real track cars crack wheels. The carbon wheel in theory should stand up better by leaps and bounds than aluminum.

I think they chose the aluminum wheel because it’s probably a lot faster/easier to produce. Race teams are buying those cars. They can’t run a wheel that is 180-365 days back ordered.

Because on serious track cars, the wheels are a wear item. The Carbon fiber wheels are a gimmick to sell the street cars. A cool gimmick, and a great engineering exercise, but a gimmick all the same.
 

blk02edge

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I've even worn a set on our ultra smooth track in the miata.. Need a new set for 2020. I am curious how much longer if at all the CF wheels hold up for seeeerious track guys.
 

AustinSN

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I've even worn a set on our ultra smooth track in the miata.. Need a new set for 2020. I am curious how much longer if at all the CF wheels hold up for seeeerious track guys.
I'd be curious as well.

The R guys seem to be divided on when they run their carbon wheels. Some only run them on track, others don't for fear of damage.

I imagine it would be the heat cycles that would eventually cause problems.
 

DBK

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This will probably start a $hit storm, but serious track cars don’t run carbon wheels. They could have put those on the ACR, but made a deliberate decision not to.

Look no further than Ford’s own $1 million ++ no hold barred, balls-to the wall, non-street legal Ford GT MKII track car. They could have put any combination of wheel/tire/brake combo, and chose to dump the street GT’s carbon wheels for a heavier set of aluminum.

I'm not gonna disagree with this in spirit, but that's not why MkII has non-CF wheels. Carbon Rev can't even make the wheels they are already on the hook for (did they ever even deliver any Pistas with CF wheels?), let alone take the time to make a boutique set of unique sized wheels for 45 cars. Even the fact Forgeline is making them has more to do with the flexibility they have vs. BBS than anything else.
 

tt335ci03cobra

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I'm not gonna disagree with this in spirit, but that's not why MkII has non-CF wheels. Carbon Rev can't even make the wheels they are already on the hook for (did they ever even deliver any Pistas with CF wheels?), let alone take the time to make a boutique set of unique sized wheels for 45 cars. Even the fact Forgeline is making them has more to do with the flexibility they have vs. BBS than anything else.

I figured the wheels were too back logged to produce.

Does the carbon fiber wheel legitimately last longer than a traditional high performance forged aluminum wheel? I’ve seen the YouTube videos claiming ad nausium that they do, but I’d rather take the feedback from someone who knows about it first hand like yourself
 

blk02edge

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I figured the wheels were too back logged to produce.

Does the carbon fiber wheel legitimately last longer than a traditional high performance forged aluminum wheel? I’ve seen the YouTube videos claiming ad nausium that they do, but I’d rather take the feedback from someone who knows about it first hand like yourself
I can tell ya the aluminum and carbon fiber wheels last forever on Forza :D
 

Cman01

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There's a lot of stories from 350R guys damaging their CF wheels driving around on the street and hitting pot holes. They may work better on a track but 1 wrong maneuver going over a speed curbing hard and you could have wrecked CF wheels.

Even Tob's favorite youtuber (punchable face kid) had a video where he got damage on his CF wheels, and this TC guy with his.



CF wheels, they're cool and love the lighter weight over alum. wheels but for day to day usage or tracking not a good idea IMO. Now if you are loaded with cash and don't give a shit hell stock up on a couple sets and you're good to go otherwise I would run my cars on a kickass set of forged wheels (Forgeline gets my vote...………...had them on my GT500 and will street drive my ZR1 with a set also).

Ford did good using a set of Forgeline wheels on that GT MARKII.

Tony
 

Tob

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Carbon Rev can't even make the wheels they are already on the hook for (did they ever even deliver any Pistas with CF wheels?), let alone take the time to make a boutique set of unique sized wheels for 45 cars.

I thought they were caught up and producing more than ever before, no?

The wheels are produced at Carbon Revolution’s state-of-the-art purpose-built factory located in the Advanced Manufacturing Precinct at the Deakin University campus in Geelong. Automation and industrialisation specialists have helped Carbon Revolution developed cutting-edge manufacturing equipment to enable it to deliver major improvements in production. By June 2019 the team had grown to 300 staff, up from 130 a year earlier. Output has almost tripled since the beginning of 2019 and Carbon Revolution is targeting production of more than half a million wheels a year.
Carbon Revolution expands innovative wheel technology operations - Clean Energy Finance Corporation (CEFC)
 

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