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Thread: DLRA Speedweek 2019

  1. #1
    CoffeeSnobs Owner Andy's Avatar
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    DLRA Speedweek 2019

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Zed and I are heading off to DLRA Speedweek 2019 later today.

    His bike is already packed in the trailer and mine is about to go into the Snob Van along with a week's food, water, fly spray and sunscreen and a big pile of tools.

    Lake Gairdner is the salt lake where we are Land Speed Racing next week, it's a long way from anywhere in including Internet access so we won't be able to do updates but will post pictures and a story when we return.

    It's great to have Penrite on board this year, their products always stand-up in the hostile Aussie outback and you really need that over 300kmh for 8km at a time.

    Thanks to Sticker Monsters (also a Coffee Snob) for looking after our race numbers and signage, they look great.

    Thanks heaps to Paula for manning the Snobbery while the boys go play, green beans and ready to freight now roasted coffee will freight Mon-Thu while I'm racing and other roasted orders will get roasted on the 11th.

    As you know CoffeeSnobs don't really Facebook but there is some more detail on there for those that do
    https://www.facebook.com/CoffeeSnobsRacing/

    h2.jpg
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  2. #2
    Life-long Learner DesigningByCoffee's Avatar
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    All the best Andy – stay shiny side up!
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  3. #3
    Super Moderator Javaphile's Avatar
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    WooHoo! Time for the boys to go play in the salt again, and this time Zed takes his own bike for some runs! WooHoo! indeed!!!

    Safe travels and fast traps to you both!


    Java "*ZOOM*ZOOM*ZOOM*" phile
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  4. #4
    Senior Member flynnaus's Avatar
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    Godspeed in your quest. Do you have a speed target this year?

  5. #5
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    Flynn Im not sure that term would be what I might of used ...All here know what you mean tho...

    'Ernie' after all may have run the Fastest Milk Cart in the West !
    But he's got nothing on Andy the Fastest Award Winning Coffee Roaster down South.

    Hope you can tame the wheel spin at 300kmh + and Nail a new Aust Record in MPS-BG1000 ....
    355kmh !! or even no limt....nail the 360kmh
    GL with it Andy
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  6. #6
    CoffeeSnobs Owner Andy's Avatar
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    Running "moonshine" this year (E85) so am in 1000 MPS BF (F for fuel).

    350kmh would be nice for starters, as fast as I can go without tossing it away is the target!

    Heading out now, will update Sunday 10th when I get back into mobile range.
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  7. #7
    Senior Member flynnaus's Avatar
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    Quote Originally Posted by EspressoAdventurer View Post
    Flynn Im not sure that term would be what I might of used ...All here know what you mean tho...
    Yeah I admit it didn't sound right but Godspeed is a wish of good luck on a journey so I stayed with it As you said, you knew what I meant.

  8. #8
    Senior Member Jackster's Avatar
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    A event well worth attending, even if only for first 3 days or so.
    The post dawn wail of big hp engines straining against the force of ever thickening air.
    The cool crisp air with the echoes off the surrounding hills, and someone disappearing over the horizon - rapidly...

    A great little shed that serves a hearty home style meal overlooking the lake. Breakfast, lunch and tea, with drinks!

    Certainly a experience. Don't forget to take shade..
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  9. #9
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    "The cool crisp air" which quickly turns into 40c.

    But it's still worth it for the spectacle.

    Also, there is ready access to the pits where you find an openness of participants to talk about their passion.

    A unique sector of motorsport in Australia.
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  10. #10
    Super Moderator Javaphile's Avatar
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    Good to see you've survived another year in the wilds of the salt, now you just have to make it through the long trip back through the dangers of civilization!


    Java "Patiently awaiting the news" phile
    Toys! I must have new toys!!!

  11. #11
    CoffeeSnobs Owner Andy's Avatar
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    Speedweek 2019 is done and dusted, literally (we collected lots of red dust!)

    We drove to Port Augusta, headed to Iron Knob and this signpost is the last bit of bitumen and phone signal.

    1.jpg

    After 120km of red dirt and cattle-grid crossings and wildlife on the road (Roos, goats, sheep, lizards, emus) we get to the Mt Ive Submarine, time to take a photo of the snob van.

    1.1.jpg

    Drive another hour or so after the sub and setup camp near the lake, this is home for the week. We took the aeropress, kettle and small gas stove but this year also needed a generator to charge the battery in my bike so tossed in the Brazen too. It was pretty awesome to knock-out a pot of filter in the middle of nowhere. Oh yeah, before someone asks it was Yemen in the Brazen and Ardi in the Aeropress.

    2.jpg3.jpg

    The drive onto the lake as the sun cracks over the hills is always special.
    3.1.jpg
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  12. #12
    CoffeeSnobs Owner Andy's Avatar
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    The pits are on the salt lake and about 5km up and it's always a drive full of anticipation.

    3.2.jpg

    Get the two bikes ready and jump into the staging lake to queue for a run. Zed is having breakfast on the bike.

    4.jpg5.jpg5.2.jpg

    Here's a picture of 3 green ones in a row (total coincidence we were staged in that order). Sam from QLD turbo ZX1200 on the left, my supercharged 1000 in the middle and Jeff from WA ZX1400 "naked" class without body work. 3 Kawasaki bikes in a row and all 3 riders members of the 200MPH club.

    5.1.jpg
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  13. #13
    CoffeeSnobs Owner Andy's Avatar
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    Following Zed to the startline in the Snob van while he's practising his tuck and getting the leather to stretch in the right directions. He twisted the throttle and left the van shortly after this pic

    6.jpg

    We had lots of down time this year, lightning strikes on the lake smoked the very expensive Tag Heuer timing gear and it took half a day for the timing guys to move it all to new channels. We also copped a lot of wind (cross winds) which stopped racing as it's really spooky at speed and even some rain which all added to the lag.

    Waiting for another run in full gear during a "wait for the wind to lessen, Zed clocked off in a chair.

    7.jpg


    After each day it was back to the pits for changes, sprocket changes just done before sunset (and no light!)

    8.jpg

    Then drive back to camp for dinner, sleep and a pre-dawn wake-up for another day of racing.

    9.jpg

    Near all competitors were well off their best time this year, the environmental conditions just didn't allow for big powered things to get it down on the track or cross winds meant that no one could run straight.

    Zed's best pass for the week was a 123.170mph average over the mile, the record for his production class is 123.174mph. I don't even know what 0.004mph is but it's small. To make it even more impressive, his bike is a 400cc in a 500cc class so he did that speed against bikes 25% bigger than his. The rest of the week strong headwinds and slippery track conditions had him running slower but I'm sure next year he'll come back faster. He peaked over 200kmh during the runs which we think makes this the fastest Kawasaki Ninja 400 in the world... that's awesome!

    My best pass for the week was 198.74mph (320kmh) and after downloading the data from the ECU we could see that was at 48% throttle!!!! Track surface was my problem, I had tons of power (well over 300hp at the wheel) with near zero traction. During that run the front wheel of the bike was doing 320kmh and the rear 400kmh (worst slip) and the best was a 30kmh differential. The upside was that with my new ECU I get really great data after a run and can make fuelling adjustments and we have the bike tuned far better than you can on a dyno alone.

    We'll be back next year and look forward to spending the "off-season" making the bikes better. There is a lot of dust and salt in the van and trailer which are still full in the driveway so I know what the rest of my day today looks like!

    9.1.jpg

    Camping roadside at daybreak on the way home, felt "normal".
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  14. #14
    Mal Dimal's Avatar
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    Way to go Zed....
    Awesome performance mate.

    Well done again Team Freeman. Wonderful stuff...

    Mal.
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  15. #15
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    Just out of interest, How old is Zed now? Looks about 16.

  16. #16
    CoffeeSnobs Owner Andy's Avatar
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    17.5 but wouldn't get asked for ID in a pub at 6'1"
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    Quote Originally Posted by Andy View Post
    I don't even know what 0.004mph is but it's small.
    It's just a tiny bit less than one thousandth of a second. Or two inches if that helps.
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  18. #18
    Mal Dimal's Avatar
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    Quote Originally Posted by Andy View Post
    17.5 but wouldn't get asked for ID in a pub at 6'1"
    Ah, good one mate...
    Had the same with our two young blokes; eldest ended up at 6'2" and youngest 6'1" in their teens too.
    The 'Old Man'? Well, I topped out at 5'9" so not sure where the tall genes came from...

    Mal.

  19. #19
    Super Moderator Javaphile's Avatar
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    Quote Originally Posted by Andy View Post
    Zed's best pass for the week was a 123.170mph average over the mile, the record for his production class is 123.174mph. I don't even know what 0.004mph is but it's small.
    To refine theonetruepath's numbers a bit more, if the two bikes were racing side-by-side and Zed was *exactly* 0.004mph slower when the other bike hits the finish line Zed would be 2.05757708607336 inches/0.0009491579847482414 seconds behind him. Small indeed!


    Java "Go Zed Go!" phile
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  20. #20
    CoffeeSnobs Owner Andy's Avatar
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    Same same here Mal, must be what we feed 'em.

    Good one fellas, I'll let Zed know about the 2" (50mm to him). The best I calculated in my head while driving back was that he needed to be 6.5 meters an hour faster to get the record by 0.001 (which is all you need to beat it by).
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  21. #21
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    Or 52.26245798626334 mm, which makes it sound a bit bigger.
    But seriously, congratulations on another successful meet, albeit beaten by the weather this time. Even so, the results must give you great confidence for next year.
    I can't stop thinking that the attention to detail demanded by a career in roasting, mixed with a little of that black art that seems to be required, has so much to do with your success on the salt.
    And that Brazen has to be the most impressive coffee maker that I've seen in a campsite! Makes an Aeropress look insignificant.
    Once again, congratulations.
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  22. #22
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    Each generation seems to be just a little bit taller. My brothers and I were a little bit taller than our old man. My brother's kids are taller again. Better build those those doorways just a bit higher!
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  23. #23
    CoffeeSnobs Owner Andy's Avatar
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    Quote Originally Posted by Otago View Post
    congratulations on another successful meet, albeit beaten by the weather this time. Even so, the results must give you great confidence for next year.
    It was a pity we didn't get more runs in better conditions, as luck (or bad lack) has it, some of the downtime for lightning smoked timing gear was during the coolest, nicest morning and would have been faster than any other day for Zed. His 123mph run was at 3pm after a 7 hour wait in the staging lane and would have been way quicker at 8am.

    track2.jpg

    I'm now understanding just how much "the planets need to be aligned" for a great run even with all the right preparation.

    We did learn a lot from the runs we had and tuning between runs on my bike has resulted in a far better setup, we made lots of gearing changes to Zed's bike during the week and have a better understanding of the "zone" we need to be in. All good positives and we know the bikes will return next year better again.

    And that Brazen has to be the most impressive coffee maker that I've seen in a campsite! Makes an Aeropress look insignificant.
    Once again, congratulations.
    It was surreal to hear a Brazen finished beep that deep into the red dirt. Life's luxuries are a little extra special the more remote you are. The Aeropress does a fine job too and got used on the salt while waiting for a run, made in the back of a ute with a gas burner and a stainless pot.

    track1.jpg

    Emptying the trailer at home we found it had a small air leak that we missed, Zed's rim was black when we packed the bike in, now red dirt coloured and the other end of the bike has some obvious skunk-stripe salt build-up.

    red.jpgwhite.jpg
    Lots of washing already on both bikes, low pressure soaking over and over and a overdose of chain oil before the pull-down and manual clean. I think the snob van will need pressure washing inside and out, so much red/white in every crack and crevice and every surface feels sticky with humidity making the in-ground salt tacky.

    Ahh the fun of post-race.
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  24. #24
    Senior Member Jackster's Avatar
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    Andy, you have to point the exhaust into the wake behind the bike. The faster you go, the more important it is.
    There was some guru engineer doing testing on fast bikes. It's like a 5% reduction in drag at 200kph. I can't find the paper right now. Maybe it's gone to dark web repository.
    They were testing with speeds at the end of one racetrack straight, the modified tailpipe bikes were faster, and then slower without the pipe.
    Even if you don't believe me, make a pipe and take it next year to try. Gotta be worth trying it..
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  25. #25
    CoffeeSnobs Owner Andy's Avatar
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    Interesting idea, I had heard of pointing it into the rear rim for a similar effect. Our class rules say the exhaust needs to finish in front of the rear of the rear tyre, point away from the rider and the salt surface. I think where it is now is inside the wake, unlike the previous bike that was outside.

    My bike also throws a 5 foot flame when backing off (spectacular in the dyno room)
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  26. #26
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    Quote Originally Posted by Andy View Post
    My bike also throws a 5 foot flame when backing off (spectacular in the dyno room)
    post up a photo if you have one, be awesome to see!
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  27. #27
    Senior Member Lyrebird's Avatar
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    Quote Originally Posted by Jackster View Post
    Andy, you have to point the exhaust into the wake behind the bike. The faster you go, the more important it is.
    Yep, a major cause of drag is the large trailing area of negative pressure sucking you backwards, anything that fills the vacuum will help.
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  28. #28
    CoffeeSnobs Owner Andy's Avatar
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    Quote Originally Posted by Mb21 View Post
    post up a photo if you have one, be awesome to see!
    Too busy driving the dyno, the bike and the laptop while on the dyno to also get a picture but it's pretty awesome to see.
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  29. #29
    Senior Member Jackster's Avatar
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    How much exhaust volume? So glad you asked...

    Stolen from a engineering forum:

    Originally Posted by SBBlue (Automotive) - 4 Oct 04 23:46
    Okay, class. Excellent question, Jaded. Pay attention now, because this will be covered on the test.

    Several assumptions: 1) This is a gas engine we are talking about, 2) it is a four-cycle gas engine, 3) Combustion will be stochiometric and complete, 4) the compression ratio is about 10:1, 5) the engine is throttled (no variable valve timing), 6) normal aspirated engine (no turbocharger), and 7) volumetric efficiency (the amount of air that makes it into the cylinder during the induction stroke) is 1.00 (actually it depends upon the RPM and intake manifold pressure, but work with me here.)

    First, it should be intuitively obvious to the most casual observer that the amount of air that passes through the engine in will be equal to the engine displacement times the RPM divided by 2. For an engine of 3 liter displacement going at 3000 RPM, the amount of air pumped for minute will be 4500 liters.

    That will approximately be the intake volume flow for an engine with the throttle wide open. If we assume that the throttle is only open 33%, the intake volume flow will still be 4500 liters, but the pressure will be one-third of an atmosphere. The equivalent mass of air will be the same as 1500 liters at one atm of pressure.

    Neglecting the addition of the fuel mass, the mass of the exhaust gas will be the same as the mass of the intake gas. From the ideal gas law we know that the increase in volume of the exhaust gas will be proportional to the increase in absolute temperature. If we assume an intake temperature of 80 deg F, and an exhaust temperature of 1800 deg F (reasonable assumption, depends upon compression ratio), the absolute temperature will be 540 and 2260 deg Rankine, respectively. The volume increase will therefore be 2260/540, or 4.185.

    For the hypothetical 3 liter engine running at 3000 RPM and full throttle, the exhaust gas volume will be about 4500*4.185, or 18,833 liters/min. At one third throttle the corresponding flow is 6277 liters/min. Since one cubic foot is equal to 28.3 liters, the respective CFM flows will be 665.4 and 221.8, respectively.

    How about the contribution from combustion products? Assuming stoichometric combustion, there will be one pound of fuel burned for each 14.55 lbs of air. Air is 21% oxygen, so there is 3.05 lbs of oxygen available to burn each pound of gas.

    A reasonable chemical approximation for gasoline is octane, which has a chemical of C8H18. The molecular weight is (12*8+18*1)= 114.

    The combustion formula is C8H18 + 12.5 O2 ==> 8 CO2 + 9 H20. For each 114 grams of C8H18, there will be 12.5 moles of oxygen consumed, producing 8 moles of CO2 and 9 moles of H2O. For gas volume purposes, since equal moles of gas produce equal volume, the volume of exhaust gas replacing oxygen will be equal to 17/12.5 = 1.36.

    The volume percentage of oxygen in air is about 21% (not exact, but work with me here). This volume will be removed, and replaced by exhaust gas with a "volume" of (21*1.36) = 28.56%. The resulting post combustion volume is (79% + 28.56% = 107.56%) of the pre- combustion volume -- assuming no temperature increase.

    So what do we have? Combining the increase in volume from combustion reactions and thermal expansion, an engine with a 3 liter displacement running at 3000 rpm with the throttle wide open will have an exhaust volume (at 1800 deg F) of 665.4*1.0756 ~~ 715 cubic feet per minute. For the throttle one-third open, the exhaust flow will be 238.6 cfm.
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  30. #30
    Senior Member Jackster's Avatar
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    But, you have a supercharged 1 litre, Google says 35psi (wow!). So let's say that's equivalent to a 3 litre aspirated engine.
    But the kicker is you not at 3000rpm, so triple the figure to 2150cfm.
    That's 61000 litres per minute!

    Obviously that is not much compared to the hole you are pushing in the air at 320kph..

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    Brilliant, well done team Coffee Snob Green.
    Zed's effort would appear awesome in light of conditions etc.

    Thanks for the read and pics
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  32. #32
    CoffeeSnobs Owner Andy's Avatar
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    Good article Jackster.
    Your guestimates are pretty close too


    Several assumptions:
    1) This is a gas engine we are talking about,
    E85 running about 50% more fuel than it's petrol cousin. Extra fuel used to cool the intake charge (as petroleum based fuels just boiled the engine in under a minute)


    2) it is a four-cycle gas engine
    Yep.


    3) Combustion will be stochiometric and complete
    Running 0.82 Lambda up the top-end, stoichiometric would turn it into an oxy-torch at about half track.


    4) the compression ratio is about 10:1,
    Closer to 8.2:1


    5) the engine is throttled (no variable valve timing),
    Correct


    6) normal aspirated engine (no turbocharger),
    Supercharged and near twice the volume of the stock supercharger and more efficient at high RPM. It's also driven faster and in round numbers is 10 times the engine RPM so at 12,500rpm it's spinning at 125,000 rpm, at redline of 14,400 it's spinning at 148,000 rpm.
    Super secret before and after pic:
    blow.jpg

    7) volumetric efficiency (the amount of air that makes it into the cylinder during the induction stroke) is 1.00
    My VE is lower than 1 looking at my graphical fuel maps.




    Quote Originally Posted by Jackster View Post
    But, you have a supercharged 1 litre, Google says 35psi (wow!). So let's say that's equivalent to a 3 litre aspirated engine.
    But the kicker is you not at 3000rpm, so triple the figure to 2150cfm.
    That's 61000 litres per minute!

    Obviously that is not much compared to the hole you are pushing in the air at 320kph..
    Not sure where you googled the blower output but the figure is pretty close. Stock H2 is 17psi boost, H2R is 22psi and this one we saw 37psi on the dyno. On the salt last week I wasn't logging boost (and too busy to look at the gauge) but we do log MAP (Manifold Abs Pressure) and it was 36psi odd at 10,500 rpm so would nearing 40psi and tears at redline just before I spit the crank out of the case and ran over it with the back wheel.

    Redline of 14,400 is unlikely to be seen (in one piece for long), we did the runs short shifting at about 6000rpm into top gear and roll-on the torque to 11,000rpm in top. The bike would do this up a wall, traction is my killer at the moment not HP or torque.

    A few of the fast guys (who were also wheel spinning the full length of the course) have 100kg of ballast in the swingarm, some even more. I suspect some of my off-season will be looking at pinning that tyre harder on the surface.
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  33. #33
    Senior Member Jackster's Avatar
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    That was the biggest eye opener that I had for salt lake racing. Vehicles are heavy!
    No aero, as it costs too much in drag. So they load up as much as they need in actual weight.
    The first year I went was a guy in a big block Jag (can't recall his name, but I think he was doing the lake entry inspections). I thought it looked impressive and asked if it was fast on the mile. He said not likely, it has a " plate for the floor pan, and " in the boot.
    20140305_084021_zps5bb4af9a.jpg
    Weight is inconsequential, as there is 3 miles to get it chuffing. It's the frontal area and the aero shape behind the centre of gravity that seem to be most important.
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    It's called Shaguar. See the DLRA Forum Build Diaries for a detailed description of its build process. Very interesting.

  35. #35
    CoffeeSnobs Owner Andy's Avatar
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    That's Gary Satara, he's a member of the 200mph club in that Jag.
    https://www.dlra.org.au/profiles/418.htm

    He is a really good bloke and is still doing lake entry (at least the last 3 years I've raced). The guys on lake entry get dust, dust, dust and none of the fun on the lake. They do an amazing job.

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    Quote Originally Posted by Andy View Post
    Interesting idea, I had heard of pointing it into the rear rim for a similar effect. Our class rules say the exhaust needs to finish in front of the rear of the rear tyre, point away from the rider and the salt surface. I think where it is now is inside the wake, unlike the previous bike that was outside.

    My bike also throws a 5 foot flame when backing off (spectacular in the dyno room)
    Yebbut... have you roasted beans with it...
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  37. #37
    CoffeeSnobs Owner Andy's Avatar
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    Quote Originally Posted by theonetruepath View Post
    Yebbut... have you roasted beans with it...
    Oh yeah, this is a coffee forum eh. Nice work getting it back on a topic of coffee.



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