Yannih
Have you heard of Lake Gairdner South Australia it's 168Km x 48Km (160Km²)
Pretty big, thats where I hope to go :-)

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Thank you comrade knovikov, now pls explane to Piker and Maddy how a bike can stop in 0.25 sec

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With regard to teh stopping time from 186 mph...I hope there is not a wall at that 1/4 mile mark !!!

All joking aside, at that speed 1/4 mile would be pretty tight and I personally would hate to have to get on teh brakes that hard...I have a couple of dozen passes at Colorado Mile at 186 mph to 192 mph and and I was pretty comfortable using about 3/8 mile of shutdown but that is hitting the end of teh speed trap and immediately starting to apply brakes.. No room for snoozing ;) Maddy with as much room as you will have, I would certainly ease off teh throttle and then carefully apply brakes . Another friend who races LSR told me that braking is teh most dangerous part of teh run as far as he is concerned and he has years of experience..of course we are not making 2 miles at full throttle either......Just remember ...smooth...

* Last updated by: chrly on 2/7/2019 @ 7:25 PM *

So Charly

Is it roll off the gas and easy on the rear 1st then the front?

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That is the way I was taught, prenents throwing too much weight on front suspension. But you are not using the rear to stop at that point, just to make sure bike is “settled”

On a related note, I once cut throttle abruptly at about 160-170 mph during a tuning run. No brakes just 100% to 0% instantly. The front suspension bounced abruptly and it was very unnerving. I'll have to find a suitable tuning technique because chopping the throttle at that speed isn't safe. Hard on the brakes is probably about the same.

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Rook, pulling in the clutch as you chip the throttle will prevent overloading the front end but I would practice at slower speeds first :)

* Last updated by: chrly on 2/8/2019 @ 7:30 AM *

Gotcha curly. That's what I was thinking of doing for tuning runs. rolling off slow messes up the fuel trims.

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What? Hagrid wins again?

Ah. Very well.

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Gotcha curly. That's what I was thinking of doing for tuning runs. rolling off slow messes up the fuel trims.

Also will soon have an Autotune switch I can flip off at the end of the run

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Would a data logger not be better.? I have not used any of teh "new" to me electronics that are availble ..

Hi Maddy.
Which event would you be going to at Bonneville, SCTA or Bonneville Speed Trials?
You had some concern about your bike not been stock because the limiter would be disabled.
Look at it like this. If everyone ran with the limiter on theoretically everyone would come in with the same speed!
If you are serious about running on the salt here are a few things to consider.
Weight is your friend, you need weight over the rear wheel for traction.
Big fat tires are your enemy, they create more drag than you would believe. the smaller the tire you can safely fit to your wheel rims, the better.
An "O" ring chain will rob more horse power than an old school roller chain.
Bonneville Salt Flats is 4000ft above sea level and with a corrected altitude for temperature it is about 6000ft.
Whilst the ECU takes care of things the fact remains that the air is still thinner than at sea level.
Aerodynamics is one of the most important things if not the most important, and is one of the things that I see mostly ignored.
I believe that the SCTA (and I'm sure someone will be correct me if I'm wrong) also runs cars and bikes at the same event. Bonneville Speed Trials is bikes only.
SCTA rules are a little more stringent than BST rules.

* Last updated by: redboot on 2/10/2019 @ 1:24 PM *

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At Bonneville Speed Trials when the salt allowed, the track would be eleven miles long, with the TIMED MILE between mile 5 and mile 6 ( you are only timed over 1 mile not 2 miles)
If you run under 175mph then you have to start from mile 3 which gives you a two mile run up to the timed mile.
At 175 mph you will want at least 1 mile to slow down on the salt and get off the track.
If you run faster than 175mph on the short track then you will qualify to run on the long track from mile zero which will give you a 5 mile run up to the timed mile. This is optional, you can still run from mile 3 if you wish to.

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Would a data logger not be better.? I have not used any of teh "new" to me electronics that are availble ..

That would be another solution. I have that capability with the PC5 and Log File Manager. It would require a lot more time to look through the data, find the perfect trims and manually input them. Accept All Trims is a lot quicker but you need to be off the throttle instantly at the end of the run to avoid going back down through some of the cells at partial throttle.

I've only looked at data logs so far and they seem like they might be exactly what's needed for FINE-fine tuning the fueling. There are some very short durations of a couple tenths of a second where my map ran very lean. ...that's something for me to consider working out in the future if I see it repeating run after run.

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I did 189.3 in a standing start 1/2 mile land speed on my 2012 stock R with a flash tune to get rid of the nannies and slip ons to get rid of the 36 pounds of stock cans! I did put a 41 tooth on the rear instead of the stock 42 so, I was way up fifth gear at the stripe. I am very aerodynamic, though....

I needed to hit the brakes hard after the lights, as there asn't much shutdown area at the airstrip we were on. Blue discs anyone?

* Last updated by: ualSpeeding on 2/23/2019 @ 5:52 PM *

ualSpeeding
I did 189.3 in a standing start 1/2 mile land speed on my 2012 stock R with a flash tune to get rid of the nannies and slip ons to get rid of the 36 pounds of stock cans! I did put a 41 tooth on the rear instead of the stock 42 so, I was way up fifth gear at the stripe. I am very aerodynamic, though....

That is getting everything out of that R I think !! What do you mean by "very aerodynamic" ( I am heading for teh Texas Mile in a month :) )

* Last updated by: chrly on 2/23/2019 @ 7:04 PM *

Hey Guys, something I just thought of,

Should you run Nitrogen in the tyres for these high speeds or doesn't it matter?

Thanks Maddy

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Good question Maddy..I am curious as to the benefits or lack there of myself.

ualSpeeding
I did 189.3 in a standing start 1/2 mile land speed on my 2012 stock R with a flash tune to get rid of the nannies and slip ons to get rid of the 36 pounds of stock cans! I did put a 41 tooth on the rear instead of the stock 42 so, I was way up fifth gear at the stripe. I am very aerodynamic, though....

That is getting everything out of that R I think !! What do you mean by "very aerodynamic" ( I am heading for teh Texas Mile in a month :) )

I weigh ~160 suited and booted and I am very thin, so I could really get under the paint. It's amazing how much difference a slight error can make in a run like this, miss a shift by a few rpm, have a knee sticking out in the wind a little far and you can lose a lot of mph. I did 3 runs over 180 that day and this was the best one. I was the fastest naturally aspirated thing there. My buddy's turbobus, gen one, went 205 and melted the motor when the meth quit. A tuned and piped H2 went 193. There were twin turbo lambos, ZR1s, etc. etc. but nothing closed on the Canadian freak show we brought.

There's not a lot to gain by putting nitrogen in your tires. Air is just fine, keep the tire pressure on the high side as opposed to the low side.

* Last updated by: redboot on 2/24/2019 @ 6:38 PM *

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