RTI Index and the changes in suspension effects

[sclarke]

This might interest those who want to play with the suspension on their LR.

Looking at it, the stock LR is better than the Modified.

http://www.okoffroad.com/okrovers/events-rti-02.htm

Steve

[discowhite]

so how dose one make one of these RTI ramps??

anyone got the dimensions???

my disco went from sagged and soft (alright) to stiff and rough(good onroad) now tall and soft (the best by far)

its all in the spring rates.


phil.

[DaveS3]

RTI doesnt really mean Jack all in the real world

Its only a number that takes into account a static ramp :roll:

It has no 'real' reflection on how well your suspension is set up at all

[sclarke]

Originally posted by DaveS3
RTI doesnt really mean Jack all in the real world

Its only a number that takes into account a static ramp :roll:

It has no 'real' reflection on how well your suspension is set up at all

Rubbish Dave

if you get great articulation on the ramp front and rear then it will be better in the bush.
Remember Articulation is the key to keeping the wheels on the ground.

So futher up you can get with all 4 contacting a surface then better off you are.
If you can prove this wrong then please let me know as i'd be very keen to see how.

Steve

[DaveS3]

RTI isnt everything though.
Its all in how you design your suspension - ie antisquat, antidive roll axis and coil rates etc....
Many people do it with soft coils so that the can have flex and believe that there rig is getting traction and is stable - but this is crap as generally they will become less stable.

The key is to design something with reasonable 'flex', but not to much so that it is unstable.
A stable rig is everything on what we drive, the other thing is that the rig doesnt always have to have all wheels on the ground to be stable.

Firm coils and a well setup link system is the go...

Having all wheels, 3 or 2 wheels on the ground doesnt mean you have traction either -> you need weight on the wheel, soft coils and unretained suspension systems dont generally help this either.

BTW - what RTI did you get?

Dave.

[abaddonxi]

What's a <div class='quotetop'>QUOTE</div><div class='quotemain'> '93 Range Rover County LWB[/b][/quote] From http://www.okoffroad.com/okrovers/events-rti-02.htm?

cheers

Simon

[DaveS3]

County is just the trim level AFAIK.

As to the LWB - LSE????

Somone else would be able to clarify properly.

Dave.

[discowhite]

well my softer springs feel to me alot safer off road now than
the stiffer ones, due to the fact the springs arnt trying to push the body
off the other side.
as far as im concerned its set up better now than it was from standard.

i wanted the ramp specs more for this
<div class='quotetop'>QUOTE</div><div class='quotemain'>one should always ramp one's vehicle (especially after suspension modifications) to verify that there are no interference issues in the suspension or driveline.[/b][/quote]

if i cant build one spose i'll have to use another way........
like works tilt tray style_emoticons/<#EMO_DIR#>/laugh.gif
phil

[DaveS3]

I think they make them either 23*, 24* or 30* for the big trucks.

23* or 24* would be fine.

[harry]

8) so a stock disco goes pretty well eh!
and if i lift it it won't fit in the shed.
wonder what those figures mean in reverse [ie backing up the ramp?]

[RR5L]

<div class='quotetop'>QUOTE</div><div class='quotemain'>
if you get great articulation on the ramp front and rear then it will be better in the bush.
Remember Articulation is the key to keeping the wheels on the ground.
[/b][/quote]

Dont worry about keeping all 4 wheels on the ground, just lock the damn things F & R :evil: style_emoticons/<#EMO_DIR#>/biggrin.gif

[sclarke]

Originally posted by DaveS3


BTW - what RTI did you get?

Dave.

???? No idea. dont know where there is a ramp to test it on....

[abaddonxi]

Originally posted by discowhite


if i cant build one spose i'll have to use another way........
like works tilt tray style_emoticons/<#EMO_DIR#>/laugh.gif
phil

Perfect. style_emoticons/<#EMO_DIR#>/laugh.gif

Cheers
Simon

[DaveS3]

Originally posted by sclarke+--><div class='quotetop'>QUOTE(sclarke)</div><div class='quotemain'><!--QuoteBegin-DaveS3


BTW - what RTI did you get?

Dave.

???? No idea. dont know where there is a ramp to test it on....[/b][/quote]

Don't worry then...

I thought you tested it :oops:

Dave.

[DEFENDERZOOK]

Originally posted by discowhite


if i cant build one spose i'll have to use another way........
like works tilt tray style_emoticons/<#EMO_DIR#>/laugh.gif
phil


<span style="color:blue">not that hard to build......
the formula to calculte RTI index is here.....
and yes the tilt tray will work perfectly....</span>




http://www.okoffroad.com/okrovers/events/r...rti/diagram.jpg (http://www.okoffroad.com/okrovers/events/rti/diagram.jpg)

[Tusker]

Originally posted by DaveS3
RTI isnt everything though.
Its all in how you design your suspension - ie antisquat, antidive roll axis and coil rates etc....
Many people do it with soft coils so that the can have flex and believe that there rig is getting traction and is stable - but this is crap as generally they will become less stable.

The key is to design something with reasonable 'flex', but not to much so that it is unstable.
A stable rig is everything on what we drive, the other thing is that the rig doesnt always have to have all wheels on the ground to be stable.

Firm coils and a well setup link system is the go...

Having all wheels, 3 or 2 wheels on the ground doesnt mean you have traction either -> you need weight on the wheel, soft coils and unretained suspension systems dont generally help this either.

BTW - what RTI did you get?

Dave.

Gotta agree..

Its more important to have a balanced vehicle, front to rear, that will always be more stable in the real world. You can get a sexy RTI getting all the flex from the rear, but it just won't work as well in the bush.

Regards
Max P

[sclarke]

Originally posted by Tusker+--><div class='quotetop'>QUOTE(Tusker)</div><div class='quotemain'><!--QuoteBegin-DaveS3
RTI isnt everything though.
Its all in how you design your suspension - ie antisquat, antidive roll axis and coil rates etc....
Many people do it with soft coils so that the can have flex and believe that there rig is getting traction and is stable - but this is crap as generally they will become less stable.

The key is to design something with reasonable 'flex', but not to much so that it is unstable.
A stable rig is everything on what we drive, the other thing is that the rig doesnt always have to have all wheels on the ground to be stable.

Firm coils and a well setup link system is the go...

Having all wheels, 3 or 2 wheels on the ground doesnt mean you have traction either -> you need weight on the wheel, soft coils and unretained suspension systems dont generally help this either.

BTW - what RTI did you get?

Dave.

Gotta agree..

Its more important to have a balanced vehicle, front to rear, that will always be more stable in the real world. You can get a sexy RTI getting all the flex from the rear, but it just won't work as well in the bush.

Regards
Max P[/b][/quote]

Yes i agree with balance. But i read Daves responce as RTI does not mean anything.
if you have flex, articulation, all wheels on the grond with even weight then you will get traction..... if not install a Maxi...