froggy
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| posted on 26/7/07 at 08:29 PM |
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drag racing advise needed
my little van is going to santa pod in a fortnight and im not sure if im a little under geared as it is at 10 mph per 1000 rpm in top but being a v
twin it revs to10k .it has a dyno ed 125 at the wheel and weighs 450kg . im hoping for around 13-14 second quarter  i ve had a brief search but
havent found any 1/4 mile times for bec,s
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Ratters
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| posted on 26/7/07 at 08:36 PM |
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Can't help you with times, but I reckon you will be pretty much flat out over the line. Most cars running those times probably cross the line
best part of 100mph but they weigh in about twice as much as yours I expect 
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JoelP
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| posted on 26/7/07 at 08:38 PM |
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do you plan on doing the gearchanges clutchless? Your estimate is good from what i can guess, a lot also depends on tyres and weather but i guess 13.5
on a hot day to 14.5 on a cold day.
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iank
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| posted on 26/7/07 at 09:01 PM |
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1/4 mile times for BECs and CECs at York in this thread (and a few from Santa Pod further down)
http://www.locostbuilders.co.uk/viewthread.php?tid=58456
Hellfire's post about halfway down.
Have fun
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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desyboy
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| posted on 26/7/07 at 09:02 PM |
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I ran a 13.5 sec @ 97 mph in an R1 mk indy, so it doesnt sound like your far away.
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Hellfire
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| posted on 26/7/07 at 09:04 PM |
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York Dragway couple of weeks ago - as iank says 13.2 damp 105mph, got a 12.49 on a dry warm day.
Have a look on our website - a few video's to whet your appetite...
Steve
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Hellfire
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| posted on 26/7/07 at 09:04 PM |
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These are the quarter mile times of last years York Raceway drag day, to give you some idea. Mixture of both BEC's and CEC's.
11.727 NOS Blackbird BEC
12.123 Nissan 200SX CEC
12.138 Honda S2000 CEC
12.523 ZX12R BEC
12.900 GSXR1000 K2 BEC
13.128 ZX9R BEC
13.274 Fazer 1000 BEC
13.280 954 Blade BEC
13.522 893 Blade BEC
13.555 893 Blade BEC
13.557 R1 BEC
14.131 ZX9R BEC
14.140 Tuned Pinto CEC
14.494 893 Blade BEC
14.675 Tuned Pinto CEC
14.740 2.0 Zetec CEC
14.803 1.6 Toyota CEC
15.260 Pinto CEC
Phil
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ChrisGamlin
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| posted on 26/7/07 at 09:08 PM |
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Ive done a couple of 1/4 mile days and managed 13.5 @ 105 with the blade and 13.0 @ 110 with the R1, in a car that weighs about 520kgs with me on
board. On the same day a couple of mates in ZX12 and Busa BECs respectively got into the 12's, the ZX12 STM Locost managed 12.5 @ 115mph which
is pretty good, especially as it was on Toyo Proxes!
I think that most BECs should be capable of getting into the 13's at least and getting over 100mph terminal, but Ive also seen a friend's
blade BEC that in the real world was every quick as mine with the same engine not break into the 14s and not break through 100mph so I guess a lot is
down to tyres / technique / track condition etc.
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ReMan
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| posted on 26/7/07 at 10:04 PM |
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This is remarkably intuitive.
http://www.locostbuilders.co.uk/viewthread.php?tid=70663
So yours shoul be about 12.5-13.0
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RazMan
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| posted on 26/7/07 at 10:15 PM |
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Rats - beat me to it 
Power at Flywheel (BHP) : 150
Weight without Driver (KG) : 450
Power to Weight Ratio (BHP Per Ton) : 338.68
0 - 60 (Secs) : 3.80
0 - 100 (Secs) : 10.27
60 - 100 (Secs) : 6.47
Quarter Mile (Secs) : 12.25
Terminal Speed (MPH) : 109.23
Drag Strip Quarter Mile (Secs) : 12.15
Drag Strip Terminal Speed (MPH) : 110.56
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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ChrisGamlin
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| posted on 27/7/07 at 11:01 AM |
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Im amazed that website gets as close as it does to be honest because it must make a LOT of assumptions (torque, max rpm, gearing, frontal area, drag
coefficient, tyre coefficient of friction etc etc) so there has to be an element of luck in there that its giving out relatively accurate figures, but
that means it may not be the case for all cars.
You only need to look at the amount of parameters in Cartest to realise how many different factors there are that affect how quickly a car
accelerates.
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