Landracing Forum

Loring Timing Association (Maine) => Loring (AFB) land speed venue => Topic started by: tortoise on June 12, 2012, 12:39:13 PM

Title: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 12:39:13 PM
Only "special tires designed by the manufacturer, i. e. Bonnevile tires or land speed tires" are allowed per the rulebook for such speeds. No existing lsr tires look very suitable for 1.5 mile hard acceleration on pavement.

As it is, if its tires were legal, a top fueler or funny could idle for 1.25 miles, then punch it and set an easy record.
 
What's next?

Title: Re: 250 mph+ car tires
Post by: sabat on June 12, 2012, 12:53:08 PM
Do you think a NHRA fuel car could "punch it" with LSR tires?
Title: Re: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 01:06:52 PM
Do you think a NHRA fuel car could "punch it" with LSR tires?

No. I meant with drag slicks. This would be illegal not recommended per LTA rules. I'm wondering whether there's any legal, safe way to build a 251 mph car to run LTA.

To be really significant, a mile or 1.5 mile record should be faster than a 1/4 mile record for an equivalent class, seems to me.
Title: Re: 250 mph+ car tires
Post by: SaltRat on June 12, 2012, 05:41:53 PM
Its easier to ask forgiveness than permission.
Title: Re: 250 mph+ car tires
Post by: dw230 on June 12, 2012, 07:07:15 PM
If I followed your math a Top Fuel car should run 20 times faster at Bonneville than at the 1/4(1000').

DW
Title: Re: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 07:24:54 PM
If I followed your math a Top Fuel car should run 20 times faster at Bonneville than at the 1/4(1000').

DW
Apparently you didn't follow it. We're talking about pavement here, anyhow. (You're teasing me, I guess.) But it should go at least as fast at Loring or Mojave as it does at Pomona.

What I'm getting at is "the future of land speed" as Loring bills itself, has just about maxed out for cars, unless some new tires show up.
Title: Re: 250 mph+ car tires
Post by: sabat on June 12, 2012, 08:28:52 PM
Of course NHRA fuel cars depend heavily on a well prepared surface. The Loring surface would be like ice by comparison.

Title: Re: 250 mph+ car tires
Post by: Peter Jack on June 12, 2012, 08:39:04 PM
I doubt that the tires they use would last for the mile an a half.  :-o :-o :-o

Pete
Title: Re: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 09:18:53 PM
I doubt that the tires they use would last for the mile an a half.  :-o :-o :-o

Pete

Yeah, but they could idle to maybe 1600 feet from the finish, make an easy pass, and run in the high 280 range or so, which would give them the course record, but why bother?

For smaller displacement cars under 250 mph, drag radials are good per the rulebook. Lakesters and streamliners might run some very good numbers there. You'd want a different build than for the salt, though.
Title: Re: 250 mph+ car tires
Post by: Dr Goggles on June 12, 2012, 09:35:56 PM
I doubt that the tires they use would last for the mile an a half.  :-o :-o :-o

Pete

Yeah, but they could idle to maybe 1600 feet from the finish, make an easy pass, and run in the high 280 range or so, which would give them the course record, but why bother?

For smaller displacement cars under 250 mph, drag radials are good per the rulebook. Lakesters and streamliners might run some very good numbers there. You'd want a different build than for the salt, though.
Pretty expensive bragging rights, it's a card accepted at very few outlets.......

Their 1/4 buddies  will say "so what" , their new friends will give them due credit for their 132ft time and move on.

Can't see many people with those big, thirsty, parts hungry motors seeing it as an attractive  milestone....

Now, the 911, that's something different.
__________
$.02
__________

Title: Re: 250 mph+ car tires
Post by: 4-barrel Mike on June 12, 2012, 09:39:21 PM

Now, the 911, that's something different.
__________
$.02
__________



Ooooh! I'd donate to a fund to help pay to get the 911 to Maine.   :cheers:

Mike
Title: Re: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 09:55:03 PM
Pretty expensive bragging rights, it's a card accepted at very few outlets.......

One thing you could do (I think) at Loring or Mojave, if they set up the lights for it, and paid the bureaucrat, is run for FIA or FIM standing start kilo records. Accepted worldwide.
Title: Re: 250 mph+ car tires
Post by: Dr Goggles on June 12, 2012, 09:58:44 PM
Pretty expensive bragging rights, it's a card accepted at very few outlets.......

One thing you could do (I think) at Loring or Mojave, if they set up the lights for it, and paid the bureaucrat, is run for FIA or FIM standing start kilo records. Accepted worldwide.

Now, that makes sense.
Title: Re: 250 mph+ car tires
Post by: Glen on June 12, 2012, 10:27:03 PM
Don't they have to be two way.
Title: Re: 250 mph+ car tires
Post by: tortoise on June 12, 2012, 10:33:52 PM
Don't they have to be two way.
I think so. that's why I said kilo instead of mile.
Title: Re: 250 mph+ car tires
Post by: tortoise on June 13, 2012, 12:02:10 PM
The biggest problem with getting people excited about standing start world records is that they're recorded as average speeds. The NHRA ET record for 1000' feet of 3.735 translates to an average speed of 182.55 mph. Doesn't sound all that fast. 293.79 kph is no better, Most Americans have no idea what a kilometer is.
Title: Re: 250 mph+ car tires
Post by: Cajun Kid on June 13, 2012, 09:50:39 PM
Why should we care about a Kilo ?

Why do we have 1 lt and 2 lt  soft drinks rather than 1 qt and 2qt ?

At least Milk is still sold by the Gallon, 1/2 Gallon and Quart  etc...

Beer is still in 12oz cans..

Title: Re: 250 mph+ car tires
Post by: Dr Goggles on June 13, 2012, 11:15:13 PM
Yeah, I mean whoever thought up the stupid idea of a decimal system where a cubic centimetre of water is a millilitre and weighs a gram was just being a pain in the ark.... lbs, feet and fluid ounces( so, um that's a mass measurement used to calculate fluids of varying density in a volume???????).....oh, hang on will that be an imperial or a US gallon?

How far is a mile?

The fact that  "Most Americans have no idea what a kilometer is" isn't really relevant because they don't have much of a better idea what a mile is, or a mile per hour, or a pound, or a pint....or a furlong, a chain, a fathom.

I'm just waiting for metric time. :wink: :wink: :wink:


Title: Re: 250 mph+ car tires
Post by: McRat on June 13, 2012, 11:24:41 PM
Killometers are that bar on your XBox 360 screen that indicate how many bad guys you shot.  You're welcome!

In 1973? there was a national program to switch to the metric system.  Obviously nobody took it seriously.

But some American cars in that era had both metric and inch bolts on them.  Chassis mostly metric, engine mostly inch.
Title: Re: 250 mph+ car tires
Post by: Dr Goggles on June 13, 2012, 11:36:07 PM
Killometers are that bar on your XBox 360 screen that indicate how many bad guys you shot.  You're welcome!

In 1973? there was a national program to switch to the metric system.  Obviously nobody took it seriously.

But some American cars in that era had both metric and inch bolts on them.  Chassis mostly metric, engine mostly inch.

Yeah we've got heaps of cars here like that.... Here we did switch and stayed that way, I get funny looks when I'm talking to people who don't know much about LSR and I talk in miles, they think its "quaint"..........

Its really easy doing a "how fast/how many revs calc in metric...in fact I do them in metric and then convert to miles.....

Ps I left out stones, bushells, cwt and rood.
Title: Re: 250 mph+ car tires
Post by: jl222 on June 13, 2012, 11:48:13 PM
Only "special tires designed by the manufacturer, i. e. Bonnevile tires or land speed tires" are allowed per the rulebook for such speeds. No existing lsr tires look very suitable for 1.5 mile hard acceleration on pavement.

As it is, if its tires were legal, a top fueler or funny could idle for 1.25 miles, then punch it and set an easy record.
 
What's next?



  We have always run Goodyear 300 mph rated 10 in wide tires on the 222 Camaro. I replaced one set after 12+ yrs because I thought they were to old and had small cracks running with the grain [ the goodyear rep said they should have been fine] when I saw him at Bville. The tires still had traces of the nubs and wear holes looked as if no wear [ wish I had measured them from the start] We had a time of 288 mph with a 279 exit speed in 1994, 280 mph at the 21/4 and 294 avg. with a data logged 318 mph top speed in 1st mile in 2010.
 
 After spinning on a wet and loose track last year we're replacing them with Goodyear LSR #2270 28x10-15  10.3 thread width

  and the best part $229. I asked why so much less than other LSR tires I was told they use them in [ can't remember which,
but roadracing or Nascar].

  Should last for a mere 11/2 miles. :-D

  If the rules allow, and traction is a problem, I would look at a wider roadrace tire.

               JL222