57 replies to this topic

[samsfern]

lol, ive been researching and have read all different things, one site was even suggesting the noise is through loss of energy???? but isnt the purpose of straight cut gears to reduce power loss???

[Cooperman]

My 1293 'S' did 30 rallies with a SC gearbox and standard helical drop gears. It then stripped the transfer gear so I fitted straight-cut ones. I find the noise so intrusive and unpleasant I'm going to take the SC drops out and replace them with new standard helical ones again. The SC box is not too bad and I need the close ratios to keep it on the cam, but the SC drops mean I have to wear earplugs on the road (helmet keeps the noise down in competition).

[MRA]

My 1293 'S' did 30 rallies with a SC gearbox and standard helical drop gears. It then stripped the transfer gear so I fitted straight-cut ones. I find the noise so intrusive and unpleasant I'm going to take the SC drops out and replace them with new standard helical ones again. The SC box is not too bad and I need the close ratios to keep it on the cam, but the SC drops mean I have to wear earplugs on the road (helmet keeps the noise down in competition).

I am guessing that this is a fully fledged rally car and as such you don't have a great deal of sound deadening

If on the other habd you have a decent level of sound deadening then normally it is not so load...... well in my case it's not so bad, maybe I should get my ears tested

[cooperdan]

so if i went with a sc box and added plenty of sound deadning would it be driveable everyday, and occasionally on motorway?

I mean how thick is your deadning in yor mini Mra-minis?

[samsfern]

i have none, i even scraped it all of the floors but i like the noise

[HARBER07]

yuri.k hunt

LMAO!

[mini93]

straight cut drops and straight cut dog box FTW...my gearbox is louder than my drops i can just hear the supersonic now

[liirge]

Ive heard that the semi straight cut crown and pinion for the differential makes alot of noise.

[mini93]

it does, my friend has one in his saxo rally car, of course its a different sound as the speed doesnt drop at rev changes only increasing untill over-run

[samsfern]

so the faster you go the more damage you do to your ear drums, lol

[mini93]

dont know why people exagerate the noise really isnt that bad, i did L2B and home to riv run and back in my mini

[cooperdan]

dont know why people exagerate the noise really isnt that bad, i did L2B and home to riv run and back in my mini

I mean do you use yours daily?

[mini93]

i did do for a while, i bought the car for rediculas amounts of money so i was using it back and forth from work 12 miles each way

[mini13]

I use mine as a daily too... although that is with a 3.1 diff which tames it a bit...

the missus will quite happily got to sleep in it on long journeys, (and short ones)

[cooperdan]

I use mine as a daily too... although that is with a 3.1 diff which tames it a bit...

the missus will quite happily got to sleep in it on long journeys, (and short ones)

Wow...thats quite something