Jump to content


Photo
- - - - -

Straight Cut Noise

engine

  • Please log in to reply
50 replies to this topic

#16 MRA

MRA

    Previously known as 'mra-minis.co.uk'.

  • Banned
  • PipPipPipPipPipPipPipPipPipPip
  • 7,607 posts
  • Location: Due to move again....

Posted 10 March 2016 - 10:29 PM

quaife lsd

 

do you know if anywhere does semi helical transfer gears?

 

The transfer gears will not cause anywhere near as much noise a the crown wheel and pinion, however have you considered a helical LSD crown wheel & pinion set ?



#17 mini13

mini13

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 3,805 posts

Posted 11 March 2016 - 09:24 AM

something I did a while back was to divert the oil pressure relief valve out the side of the block and put a 90 deg union on it so any oil dumped back to the sump is sprayed at the drop gears.



#18 MRA

MRA

    Previously known as 'mra-minis.co.uk'.

  • Banned
  • PipPipPipPipPipPipPipPipPipPip
  • 7,607 posts
  • Location: Due to move again....

Posted 11 March 2016 - 10:04 AM

something I did a while back was to divert the oil pressure relief valve out the side of the block and put a 90 deg union on it so any oil dumped back to the sump is sprayed at the drop gears.

 

Did it quiet the SC gears ?



#19 mini13

mini13

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 3,805 posts

Posted 11 March 2016 - 11:37 AM

maybe slightly, they certainly dont clatter as much at idle.

 

the main reason i did it is so there is more oil pressent as it just relys on splash/climbig the drops.



#20 Jon937

Jon937

    Mini Mad

  • Noobies
  • PipPipPipPip
  • 130 posts
  • Location: Devon

Posted 11 March 2016 - 12:57 PM

do you have any pictures of your adapted oil pressure valve mini13?



#21 Cooperman

Cooperman

    Uncle Cooperman, Voted Mr TMF 2011

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 23,079 posts
  • Location: Cambs.
  • Local Club: MCR, HAMOC, Chelmsford M.C.

Posted 11 March 2016 - 01:12 PM

Personally I hate the noise, but if you have got to have them because you have a cam which needs ultra-close-ratio gears to keep it 'on the cam' then it is something you have to put up with. I fitted SC drop gears to my 115 bhp rally 'S', but I shall revert to helicals next time the engine comes out.

I don't run an LSD as in all my years driving Minis in competition I cannot get one to work for me. But that is rallying and for racing, sprints, hill-climbs, etc, an LSD is vital.

For pure road use I would never fit SC gears.



#22 mini13

mini13

    Up Into Fourth

  • Members
  • PipPipPipPipPipPipPipPipPip
  • 3,805 posts

Posted 11 March 2016 - 01:23 PM

Fraid not, but I just tapped & plugged the downward drain with a threaded plug, and drilled in from the side of the block to intersect the relief chamber, then tapped that drilling and screwed in a 90 deg fuel fitting like the one below.

 

http://shop.advancea...-430/10022822-P



#23 Spider

Spider

    Moved Into The Garage

  • Admin
  • PipPipPipPipPipPipPipPipPipPipPip
  • 14,170 posts
  • Location: NSW
  • Local Club: South Australian Moke Club

Posted 11 March 2016 - 06:03 PM

I don't run an LSD as in all my years driving Minis in competition I cannot get one to work for me. But that is rallying and for racing, sprints, hill-climbs, etc, an LSD is vital.

For pure road use I would never fit SC gears.

 

If the cash will stretch, try an ATB. I think you'll be pleasantly surprised.



#24 nicklouse

nicklouse

    Moved Into The Garage

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 18,098 posts
  • Location: Not Yorkshire
  • Local Club: Anonyme Miniholiker

Posted 11 March 2016 - 06:09 PM

im looking at using dog gears so there is no syncro to worry about


Have you driven a dog box?

I have and there is no way I would put it in a road car.

And then if I did the last thing I would be worried about is noise.

One thing I will say is they do work better after a few minutes of use.

But like I said I can not think of a single reason to have one in a road car.

#25 Dusky

Dusky

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 5,322 posts
  • Location: Belgium

Posted 11 March 2016 - 06:23 PM

im looking at using dog gears so there is no syncro to worry about

Have you driven a dog box?

I have and there is no way I would put it in a road car.

And then if I did the last thing I would be worried about is noise.

One thing I will say is they do work better after a few minutes of use.

But like I said I can not think of a single reason to have one in a road car.
pub points you know.. To go with kad 6 pot calipers and the race coilovers.. *sarcasm and all*

#26 MRA

MRA

    Previously known as 'mra-minis.co.uk'.

  • Banned
  • PipPipPipPipPipPipPipPipPipPip
  • 7,607 posts
  • Location: Due to move again....

Posted 11 March 2016 - 06:28 PM

 

 

im looking at using dog gears so there is no syncro to worry about

Have you driven a dog box?

I have and there is no way I would put it in a road car.

And then if I did the last thing I would be worried about is noise.

One thing I will say is they do work better after a few minutes of use.

But like I said I can not think of a single reason to have one in a road car.
pub points you know.. To go with kad 6 pot calipers and the race coilovers.. *sarcasm and all*

 

Sounds more like somebody can't afford the nice parts themselves......  the OP has asked questions, the last thing they want to hear is some special people running them down.


Edited by MRA, 11 March 2016 - 06:38 PM.


#27 MRA

MRA

    Previously known as 'mra-minis.co.uk'.

  • Banned
  • PipPipPipPipPipPipPipPipPipPip
  • 7,607 posts
  • Location: Due to move again....

Posted 11 March 2016 - 06:47 PM

If you fit straight cut gears they will increase the noise, dependant on which and who made them will determine the amount of noise, poorly made will cause more noise, SC drops will be slightly noisier than the gear kit and a final drive will be even noisier...  you don't need a race cam to make them work, they will give you benefits all of their own, for instance the closer ratios means you will be able to drop it down and use the torque better, they will release more torque to the wheels, the amount can be anywhere between 10 & 15% if built correctly.

 

If you don't like the noise then don't fit them, the oil pipe as stated above was fitted to help lubrication, it did not reduce the noise by any appreciable amount.

 

A dog box on the road is fine so long as you get a later type with the tapered dogs and engineered gaps.... the earlier type used the same dogs as you get on a synchro, this type are not for road use, as you will always have issues getting first gear, some where converted to synchro on first only but I don't think these where ever released to the general public and not many were made.

The later type are a completely different beasty totally ok on the road so long as you know how to handle them,...

 

But the real question here is what do you expect to get from this ?  what torque do you think you will have and how much use will it have ?



#28 Dusky

Dusky

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 5,322 posts
  • Location: Belgium

Posted 11 March 2016 - 07:30 PM


 

 

im looking at using dog gears so there is no syncro to worry about

Have you driven a dog box?

I have and there is no way I would put it in a road car.

And then if I did the last thing I would be worried about is noise.

One thing I will say is they do work better after a few minutes of use.

But like I said I can not think of a single reason to have one in a road car.
pub points you know.. To go with kad 6 pot calipers and the race coilovers.. *sarcasm and all*
 
Sounds more like somebody can't afford the nice parts themselves......  the OP has asked questions, the last thing they want to hear is some special people running them down.

Cant afford the Nice parts?
Boy, i put my Nice parts on my race car,where they actually improve something. A race suspension on a road car makes so much sense mr. Mini specialist. Bet you say the same to Peter etc too, funny way of attracting customers.

Edited by Dusky, 11 March 2016 - 07:38 PM.


#29 Ivor Badger

Ivor Badger

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 846 posts

Posted 11 March 2016 - 07:37 PM

The real point is that straight cut gears, LSDs and all these supposedly nice things to impress people with your mini and cash flow are in effect competition parts for competition use. The noise and other disadvantages are not a problem in competition use, you can't hear the box anyway over the other noises. There are obvious performance advantages, but not on the road as the mental degradation in a short period will soon reduce your speed. If you could find a measurable advantage on the road, you probably require your head looked and a bus travel card shortly.

#30 MRA

MRA

    Previously known as 'mra-minis.co.uk'.

  • Banned
  • PipPipPipPipPipPipPipPipPipPip
  • 7,607 posts
  • Location: Due to move again....

Posted 11 March 2016 - 08:12 PM

 

 

 

 

im looking at using dog gears so there is no syncro to worry about

Have you driven a dog box?

I have and there is no way I would put it in a road car.

And then if I did the last thing I would be worried about is noise.

One thing I will say is they do work better after a few minutes of use.

But like I said I can not think of a single reason to have one in a road car.
pub points you know.. To go with kad 6 pot calipers and the race coilovers.. *sarcasm and all*
 
Sounds more like somebody can't afford the nice parts themselves......  the OP has asked questions, the last thing they want to hear is some special people running them down.

Cant afford the Nice parts?
Boy, i put my Nice parts on my race car,where they actually improve something. A race suspension on a road car makes so much sense mr. Mini specialist. Bet you say the same to Peter etc too, funny way of attracting customers.

 

I will say it to anyone who runs another Mini person down and belittles them just because you have your ideas and they are not the same as the OP's.... what you fail to remember is without people like the OP asking or making his ideas work we wouldn't have the Mini today because of all the changes some good, some not so good this life style of modification is what has kept the Mini alive !  The OP has asked the questions they have asked because they wanted answers from people not sarcasm







Also tagged with one or more of these keywords: engine

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users