11 replies to this topic

[Spence1380]

Any geeks out there know the ratio of turns on hi Lo’s to the drop height

[MiddletoM]

http://www.theminifo...-fitting-guide/

In the post by Sprocket at the bottom

[Spider]

http://www.theminifo...-fitting-guide/

In the post by Sprocket at the bottom

 

Sadly, he's followed the same error that Clive Trickey published back in the 60's for the Fronts and everyone has followed since.

 

The Front Ratio (when using Dry Arms) is 4.45:1 and the Rear Ratio is 5:1.

 

Most of the common Hilos these days use an M20 x 2.5 Bolt.

 

So, turning the Bolt 1 Flat;-
      on the Front changes the height by 1.9 mm

      on the Rear changes the height by 2.1 mm

 

1 complete turn (6 flats);-

       on the Front changes the height by 11 mm

       on the Rear changes the height by 12.5 mm

[Cooperman]

I had forgotten that and I have to set the ride height on my 1990 Cooper next week, so thanks for the up-date.

[Spider]

 

Sadly, he's followed the same error that Clive Trickey published back in the 60's for the Fronts and everyone has followed since.

 

While I haven't put any numbers on this, just looking at the Arm, it's fairly evident that the ratio isn't even close to 3:1

 

 

[no66]

 

http://www.theminifo...-fitting-guide/

In the post by Sprocket at the bottom

 

Sadly, he's followed the same error that Clive Trickey published back in the 60's for the Fronts and everyone has followed since.

 

The Front Ratio (when using Dry Arms) is 4.45:1 and the Rear Ratio is 5:1.

 

Most of the common Hilos these days use an M20 x 2.5 Bolt.

 

So, turning the Bolt 1 Flat;-
      on the Front changes the height by 1.9 mm

      on the Rear changes the height by 2.1 mm

 

1 complete turn (6 flats);-

       on the Front changes the height by 11 mm

       on the Rear changes the height by 12.5 mm

 

Thanks for that. Very usefull. My Hilos are fianally at my machine shop friend for modifing

[no66]

by the way, this info should be a sticky

[nicklouse]

 

 

Sadly, he's followed the same error that Clive Trickey published back in the 60's for the Fronts and everyone has followed since.

 

While I haven't put any numbers on this, just looking at the Arm, it's fairly evident that the ratio isn't even close to 3:1

 

 

And doing some very rough measurements on the picture confirms your numbers.

[GraemeC]

Is measuring along the arm enough? That’ll give you the leverage ratio but you’d need a bit of trigonometry to work out the height change I think.

Measurement of the height change would be the only way to say for sure.

[Pops_Guild]

Interesting. This does somewhat explain why i never seemed to get 3:1 when I did my setup. In the end I just adjusted them until it was right...

[MacGyver]

Is measuring along the arm enough? That’ll give you the leverage ratio but you’d need a bit of trigonometry to work out the height change I think.

Measurement of the height change would be the only way to say for sure.

Well the arm is almost horizontal so the trigonometry would only change the figures a tinywiny bit, the wear on the tyres would make more of a difference. ?

[Spider]

Is measuring along the arm enough? That’ll give you the leverage ratio but you’d need a bit of trigonometry to work out the height change I think.

Measurement of the height change would be the only way to say for sure.

 

Yes, for sure Graeme, but the numbers I've quoted are for better then ball park.