Replies to This Discussion

Permalink Reply by FlyHiFlyLo on February 14, 2011 at 12:01pm

With the way these cars are set to run in pairs (if NASCARs fix don't work) you will get your ass handed to you if you try to ride around in the back until 20 to go. You are going to have to find a butt buddy from start to finish. If you screw your partner half way through the race you will not win.

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Permalink Reply by Matt Gruber on February 14, 2011 at 2:40pm

There's sure to be an ugly ducking around the front that doesn't otherwise have any friends that RG could work with.

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Permalink Reply by gorobbygo7 on February 14, 2011 at 4:38pm

NASCAR listens to Fly

From Jayskis:
•NASCAR Tweaks rules to limit drafting: NASCAR officials announced two technical changes Sunday evening aimed at preventing the sustained two-car drafts that dominated Saturday night's Budweiser Shootout at Daytona. Robin Pemberton, NASCAR's vice president of competition, said the body issued a bulletin to race teams with the following specifications:
" The maximum size for the air inlet for the cooling system will be 2½ inches tall by 20 inches wide.
" The pressure release valve on the water system will be set at 33 pounds per square inch.
The intent is to set up the cars so they can't push each other in two-car tandems for extended runs without overheating. Teams try to line up drafting partners at Daytona and Talladega so they can overcome the limitations of the restrictor plates used to keep speeds down at those two tracks. "That will bring down the temperatures so the teams can't run at 290 or 300 degrees [without overheating] on the extended push of 30 or 40 laps," Pemberton said. "This will put [the water temperature in the engines] back in the 250-degree range." Several drivers, crew chiefs and team executives expected NASCAR to control the pressure relief valve. Jamie McMurray, who finished second to Kurt Busch in the Shootout, said many cars had valves that allowed the temperature up to 300 degrees before boiling over. That allowed the second car in the two-car draft to push longer without overheating -- some for more than a dozen laps -- under Saturday's cooler outdoor temperatures. The weather is expected to be warmer for Thursday's qualifying races and the Daytona 500.(see full story at ESPN.com)(2-13-2011)

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Permalink Reply by Chupakabras on February 14, 2011 at 4:54pm

so, wtf changed that no more than 2 cars could push each other to the front like on last year when 3, 4 or more where drafting without a problem,. so, wth happend?

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Permalink Reply by FlyHiFlyLo on February 14, 2011 at 5:12pm

They bumped the coolant pop off up past 30psi... every lb of pressure over 14psi @ sealevel is approx 5 degrees F. Water boils @ 212f @ sea level. This is why they could stay pinned together for so long.

And... this is a result of an aero package that takes the air from the front car and puts it on the roof of the second car. A third car will catch that air from the rear of the second car in the hood slowing it and also creating a vacuum between the third car's front bumper and the second car's rear bumper causing major drag..

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Permalink Reply by robbyfansinceimsa on February 14, 2011 at 5:37pm

I thought it was more like 3 deg/psi but anyway according to a chart it should blowoff around 275 or so. Does NASCAR have to run plain water without additives? I would imagine this is true but I do not know. Some organizations we race with require plain water others allow anything including antifreeze.

matt

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Permalink Reply by FlyHiFlyLo on February 14, 2011 at 5:51pm

It's not a linear formula... it's between 3 and 5 degrees per psi. that is why I said "Approx 5"

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Permalink Reply by Michael Martinez on February 14, 2011 at 5:54pm

What it amounts to is guys knowing they can draft in 2s' for X amount of laps. Those X amount of laps are coming at the end of the race. I see a big mess. As stated .........................

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Permalink Reply by FlyHiFlyLo on February 14, 2011 at 6:15pm

Yeah both the spotters (and drivers) need to be on top of the fact that they need room for a car twice as long.

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Permalink Reply by MartyP on February 14, 2011 at 6:48pm

So if a competitor wants to slow down a two car draft so his teammate can catch up,he needs to make it a three or four or five car draft?So now you can essentially slow down a faster pair by making it a trio or greater!

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Permalink Reply by FlyHiFlyLo on February 15, 2011 at 6:20pm

That's what happened in the shootout. But who wants to slow down? Maybe a third guy on a team with his teammates in a two car pack for the lead?

Nobody wants to slow down.

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Permalink Reply by Greg Jones on February 16, 2011 at 6:50am

my theory is that these cars need to be practically touching to draft and don't stay together very well (not much suck up) so the guy in front has to use a lot of brake or be down on HP a little (I'm afraid that's what made KB so good) I'll bet if you could get 3 cars to stay together they would be just as fast or faster. As much as I don't like restrictor plates I think a smaller rp or a taller gear would be a better solution than forcing the cars to overheat.

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