The modification must be reversible.
Thanks
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.
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.
Thanks ,
it's necessary to open de gear box ?
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 ?
Just don't use first?
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.
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??"??
If i delete the first , the RPM for the tests will be different......
The modification must be reversible.
Thanks
Take a cog out?
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!
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]
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....
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 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.....
Modify the gear linkage so 1st cant be selected?
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...
get a gear indicator and fiddle it so that 2nd shows as 1st?
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.
And when the inspector discovers this, can he have your car scrapped?
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.
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...
What ratio differential are you using ?
3,21
what is the lower diff i can use with this motor ?
Thanks.
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.
It's a very good idea Matt,
with a power commander it's possible thanks.
Sorry i would like to say , if it's possible with a power commander or if i can use one other system ?
http://ecuhacking.activeboard.com/f392256/suzuki-gsx1300r-hayabusa/
Remap the stock ECU and then reflash it back after the test
Lots of info on that site, I built the interface and have successfully flashed my ECU
[Edited on 5/2/12 by SJL]
Thanks for the link...
It's very interesting, you keep the stock Ecu and change the functions ?
Yes that's it basically no need for power commanders etc.
I would register on there and get their advice they have some very knowledgeable people on there.
why not put a physical stop on the throttle pedal so you cant press the pedal further? simple bolt with a locking nut will do. makes it adjustable and removable. wind it closer to the pedal to stop you putting your foot down - back away gives you more pedal - simplzzzzz
Why not source some of the autograss Busa users, if losing first gear is relevant they will be doing it, and know how for washers.
how about sound insulating your airbox a bit?
quote:
Originally posted by :{THC}:YosamiteSam
why not put a physical stop on the throttle pedal so you cant press the pedal further? simple bolt with a locking nut will do. makes it adjustable and removable. wind it closer to the pedal to stop you putting your foot down - back away gives you more pedal - simplzzzzz
So the test is done without an airbox? or u must use a standard airbox? surely its possible (and easier) to spend time and ennergy on a standard looking enhanced airbox!?
During the test there is an air box, i have finish the transformation of the hayabusa air box with the help of Cosmick....
The controler just defuse the air box before the tests to see if everything is ok ....
I have discuss with the man who succeed the tests with a megabusa.
He limit the rpm at 6000
Big air box
insulate everywhere (bonnet, side, under...)
1 exhaust in the side one other under the car.
The results are 82 db and the limit is 77 db.....
But after 3 essays , he have a "gift" and he pass the tests in the 3 speed instead of the 2.....so he win the 5 db.....
Sorry if i am not clear with my english.....
That is the reason why i think it's necessary to delete the first speed but if somebody can find an other solution i will be very happy and he
has a nice gift for chrismas.....
veld,
I am still looking into blocking 1st gear for you and I will be looking at an engine this weekend. Please be patient and I might have a solution.
cosmick
can you not fit 2x large silencers in line.
quote:
Originally posted by cosmick
veld,
I am still looking into blocking 1st gear for you and I will be looking at an engine this weekend. Please be patient and I might have a solution.
cosmick