'21 Generation 7 Car news

LewTheShoe said:
I agree about the undertray/diffuser on these Nascars. That 'Car & Driver' article that SOI linked said the diffusers will be track-specific, which I had not heard previously.

But the next gen Nascars have so many other levers that can be pulled to create the desired style of racing. I think we have to wait a while to know what the racing will be like. I have not heard anyone in authority say they want to move away from the flat-foot WFO style of racing on intermediate tracks. And from the Atlanta Motor Speedway plans, I think it's clear that Marcus Smith remains 'all in' on the WFO style with emphasis on pack racing. I hope I'm wrong, but that's how I read the tea leaves at this early date.
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Somebody else read the article. :cool:
 
LewTheShoe said:
I agree about the undertray/diffuser on these Nascars. That 'Car & Driver' article that SOI linked said the diffusers will be track-specific, which I had not heard previously.

But the next gen Nascars have so many other levers that can be pulled to create the desired style of racing. I think we have to wait a while to know what the racing will be like. I have not heard anyone in authority say they want to move away from the flat-foot WFO style of racing on intermediate tracks. And from the Atlanta Motor Speedway plans, I think it's clear that Marcus Smith remains 'all in' on the WFO style with emphasis on pack racing. I hope I'm wrong, but that's how I read the tea leaves at this early date.
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What brings you to this conclusion? They’re upping the banking by 4° and narrowing the surface, this isn’t some insanely major change. Won’t even be much of a difference outside of the middle of the corner
 
Mispeedway15 said:
What brings you to this conclusion? They’re upping the banking by 4° and narrowing the surface, this isn’t some insanely major change. Won’t even be much of a difference outside of the middle of the corner
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Yeah the width is the same as Daytona and Charlotte, I haven't seen anybody complaining about the widths there.
 
StandOnIt said:
Yeah the width is the same as Daytona and Charlotte, I haven't seen anybody complaining about the widths there.
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Exactly. I know we’re trying to figure this out but it’s just so damn hard with a splitter glued to the ground to create Bristol/Darlington racing across the board. You’re either underpowering the cars which stinks a bit, or you’re removing too much drag off them and making passing nearly impossible with super high corner entry speeds that narrows the racing line
 
Mispeedway15 said:
What brings you to this conclusion?
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You mean the conclusion that Smith wants pack racing at Atlanta? SMI explicitly stated that was one of the goals of the overhaul.

"The stated goal from SMI director of operations Steve Swift and track president Brandon Hutchison is to break the mold of so-called cookie cutter mile and a half tracks by creating something that more closely resembles the racing product at Daytona and Talladega each year."

Or were you referring to a different conclusion?
 
Dr_B_UNC said:
This right here. If the diffuser even eliminates 50% of the aero push effect of not being able to follow a car, it will be a huge success.
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Has there been any conversation about what happens if the diffusers are damaged from rear contact?

Also, let’s not leave Goodyear off the hook here. Aero designs be damned if the tires are hockey pucks.
 
ChexOrWrex said:
Has there been any conversation about what happens if the diffusers are damaged from rear contact?

Also, let’s not leave Goodyear off the hook here. Aero designs be damned if the tires are hockey pucks.
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Haven't seen anything yet. Probably the same kind of thing that happens when a splitter is damaged ... performance is negatively affected.

The 18" tires are probably the most significant change of all. Old notes and data NFG.
 
Charlie Spencer said:
What will be the effect of the resulting air flow on the trailing car? It seems to me the air coming off the damaged 'fuser would be very 'dirty'.
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My aero guess would be that the smooth underside is going to smooth up the air coming thru the underside to a certain extent. The ride heights are also higher than the old car so more air volume is going thru to the rear reducing the "bubble". I think the diffuser will clean the air up even more because at the rear there is a vacuum that creates turbulence that has to be dealt with similar to when a semi moves thru the air.
 
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KTMLew01 said:
Man that's a bunch of front & rear clips. Are they allowed to modify them in any way? I'm assuming no.
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I doubt it too but wonder what kind of teething problems they may have with the new car. It sure will add another layer of interest to next season.
 
Charlie Spencer said:
You mean the conclusion that Smith wants pack racing at Atlanta? SMI explicitly stated that was one of the goals of the overhaul.

"The stated goal from SMI director of operations Steve Swift and track president Brandon Hutchison is to break the mold of so-called cookie cutter mile and a half tracks by creating something that more closely resembles the racing product at Daytona and Talladega each year."

Or were you referring to a different conclusion?
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But that won’t really happen lol. 4° and smoother pavement is not going to re-create that racing on a 1.5 track. Not a chance
 
Mispeedway15 said:
But that won’t really happen lol. 4° and smoother pavement is not going to re-create that racing on a 1.5 track. Not a chance
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I would have no problem with that at all.

The point wasn't whether this configuration will produce pack racing, it's was what their goal was with this layout. If this falls short, they'll try something else the next time an SMI 1.5-miler gets overhauled.
 
Charlie Spencer said:
Will they be running together, or will these be single-car runs??
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Why would they be running seperately when the burning question would be to all who designed the car is how well will they work in traffic on a Super speedway which also applies to all of the high speed tracks?
 
KTMLew01 said:
Can't see why they wouldn't run a few mini-races to see how the cars draft and handle when side-drafted. Why would they bring 8 cars to run all by themselves? Makes no sense.
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StandOnIt said:
Why would they be running seperately when the burning question would be to all who designed the car is how well will they work in traffic on a Super speedway which also applies to all of the high speed tracks?
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I'm not psychoanalyzing why they might do one or the other, only asking which one they plan on. It's a tire test; I assume Goodyear is calling the shots. Maybe they just want as much feedback as possible. I don't know; that's why I'm asking.

I notice no one has replied definitively confirming either way yet, just answered my question with more questions.
 
Charlie Spencer said:
I'm not psychoanalyzing why they might do one or the other, only asking which one they plan on. It's a tire test; I assume Goodyear is calling the shots. Maybe they just want as much feedback as possible. I don't know; that's why I'm asking.

I notice no one has replied definitively confirming either way yet, just answered my question with more questions.
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I knew the question was a mousetrap when it was asked, but it is a slow day. Using deductive reasoning and plain ol' logic lets look at it from the Goodyear side. They have had plenty of single car tests on various tracks at speeds with much higher loads on the tires than Daytona will ever have. What data they don't have is how the tire will work in a pack under racing conditions. One car going around Daytona Goodyear isn't going to learn much. all of the above is MY opinion. :cool:
 
Charlie Spencer said:
I didn't realize running in a pack vs. running single would make a difference in tire performance.
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It could with sidewall flexing would be my first guess. Nobody knows how much buffeting these new cars have in traffic with the air would be one guess I have. (not Dr. Philling it)
 
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