veld
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 posted on 5/2/12 at 10:08 AM |
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delete first speed busa
Hello everybody,
i would like to delete the first speed on the gear box of hayabusa, what it is the best solution ?
I undestand it's can be strange but it's very important...
Thanks in advance.
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NigeEss
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| posted on 5/2/12 at 10:42 AM |
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Can't imagine why you would want to but I would look at welding up the
groove in the selector drum to stop 1st being engaged.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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veld
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| posted on 5/2/12 at 10:46 AM |
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Thanks ,
it's necessary to open de gear box ?
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NigeEss
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| posted on 5/2/12 at 10:57 AM |
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To modify the drum, yes.
Why do you want to remove first anyway ? If the gearing is wrong would it not be better to
change the differential ?
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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40inches
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| posted on 5/2/12 at 11:01 AM |
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Just don't use first?
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veld
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| posted on 5/2/12 at 11:08 AM |
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It's necessary to be impossible to pass the first but to keep the neutral, i understand it's can seem crazy but there is a link with my
other link to " reduce the noise of the air box"....
Thanks for your help.
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MakeEverything
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| posted on 5/2/12 at 12:03 PM |
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Sounds like a terrible idea to me. If you weld first out of the gear selection, you might not be able to select neutral?
I don't understand why you want to eliminate first gear to reduce air box noise??"??
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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veld
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| posted on 5/2/12 at 12:12 PM |
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If i delete the first , the RPM for the tests will be different......
The modification must be reversible.
Thanks
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scudderfish
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| posted on 5/2/12 at 12:46 PM |
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Take a cog out?
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MakeEverything
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| posted on 5/2/12 at 12:52 PM |
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You're trying to solve the symptom, not the cause. Doing this is likely to cost you more money, time and pain. If you're looking to
fiddle the RPM and noise relationship, get an adjustable rev counter. Switching it to 8cylinder will halve the RPMs. Did that on a track day once,
nd it worked!
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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minitici
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| posted on 5/2/12 at 12:52 PM |
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As per your other topic - I still think that some form of electronic rev limiting in second gear would be the best solution to your drive by noise
problem.
Could be as simple as a solenoid which creates a throttle stop when 2nd gear is sensed.
[Edited on 5/2/12 by minitici]
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veld
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| posted on 5/2/12 at 01:10 PM |
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You're trying to solve the symptom, not the cause. Doing this is likely to cost you more money, time and pain. If you're looking to fiddle
the RPM and noise relationship, get an adjustable rev counter. Switching it to 8cylinder will halve the RPMs. Did that on a track day once, nd it
worked!
During the test, they don't look the rpm but the speed, so to reduce the noise i need to limit the true rpm .
The tests have been passed in second and third speed, so if i delete the first, the test will be passed in 3 and 4.(because the 1 is now the 2).
At 45 MPh the rpm are lower in 3 than in 2 speed, so the noise is lower too, no ?
Can you explain what i can use Minitici to limit the rev in second please ?
Perharps a power commander ?
i am not sure to understand "cog out " scudderfish thanks....
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MakeEverything
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| posted on 5/2/12 at 01:58 PM |
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quote:
Originally posted by veld
You're trying to solve the symptom, not the cause. Doing this is likely to cost you more money, time and pain. If you're looking to fiddle
the RPM and noise relationship, get an adjustable rev counter. Switching it to 8cylinder will halve the RPMs. Did that on a track day once, nd it
worked!
During the test, they don't look the rpm but the speed, so to reduce the noise i need to limit the true rpm .
The tests have been passed in second and third speed, so if i delete the first, the test will be passed in 3 and 4.(because the 1 is now the 2).
At 45 MPh the rpm are lower in 3 than in 2 speed, so the noise is lower too, no ?
Can you explain what i can use Minitici to limit the rev in second please ?
Perharps a power commander ?
i am not sure to understand "cog out " scudderfish thanks....
What about recalibrating the speedo for the test? I really wouldnt start removing gears from these engines, as replacement costs are £££.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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veld
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| posted on 5/2/12 at 02:50 PM |
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What about recalibrating the speedo for the test?
I have think about this, i have a stack so i maybe it's possiblebut i think if the car cruise at 25 MPH instead of 45 probably the examinator
don't like this idea.....
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bowood14
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| posted on 5/2/12 at 03:07 PM |
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Modify the gear linkage so 1st cant be selected?
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veld
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| posted on 5/2/12 at 03:16 PM |
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It's the best and the cheaper solution but i havn't find how to keep the neutral with this solution....
A Shop purpose me to open the gear box and to modify the cylinder but it's very expensive...
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stevebubs
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| posted on 5/2/12 at 03:30 PM |
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get a gear indicator and fiddle it so that 2nd shows as 1st?
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veld
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| posted on 5/2/12 at 03:44 PM |
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It's true but it's necessary to block the first because when the examinator will pass the neutral , i will probably find the realy first
too....
Modify the gear linkage like say bowhood will be perfect but after a duscussion with cosmick , he think that will modify the Functioning of the other
speeds.
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scudderfish
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| posted on 5/2/12 at 04:05 PM |
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And when the inspector discovers this, can he have your car scrapped?
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NigeEss
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| posted on 5/2/12 at 04:12 PM |
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What ratio differential are you using ?
If the goal is to reduce rpm at a given speed then can you not put a much lower diff in ?
Easy and reversable. Maybe you could even borrow one for the test.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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veld
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| posted on 5/2/12 at 04:16 PM |
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Of course no but it's better to come with something clear....
The tests of VOSA seem to be réalist, the tests we must passed in france are very difficult...
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veld
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| posted on 5/2/12 at 04:32 PM |
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What ratio differential are you using ?
3,21
what is the lower diff i can use with this motor ?
Thanks.
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matt_gsxr
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| posted on 5/2/12 at 06:07 PM |
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Why not electronically disable the engine if it goes into 1st. Call it an engine stop mode (like 'park' for an automatic).
Cheap and easily reversed.
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veld
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| posted on 5/2/12 at 06:18 PM |
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It's a very good idea Matt,
with a power commander it's possible thanks.
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veld
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| posted on 5/2/12 at 10:25 PM |
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Sorry i would like to say , if it's possible with a power commander or if i can use one other system ?
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