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30mm raptor spacers

  • GRAYWOLF
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12 Dec 2017 09:03 #187362 by GRAYWOLF
Replied by GRAYWOLF on topic 30mm raptor spacers
Nice one, i like the look of my Jimster with spacers 30mm..tyres are 215/70x15..so a little bigger than standard..i also put a steering damper on, and that plus the wider track, i feel it handles a little more stably, and not as skittish..
Enjoy.

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  • Lambert
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12 Dec 2017 09:29 - 12 Dec 2017 09:33 #187363 by Lambert
Replied by Lambert on topic 30mm raptor spacers
I have a question. What were all you advocates of spacers driving before your Jimny that makes you feel that the Jimny is in need of greater stability? I have come to mine via coiled land rovers and previous to that subarus and honestly a standard Jimny is way more stable than a land rover and on the right road just as chuckable as my scoobies. I just can't see how a Jimny feels unstable unless you are comparing it to a ktm crossbow or a caterfield. I accept that Ermintrude has improved with the new dampers but even before them she was hardly falling over on anything twistier than the M1.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
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Last edit: 12 Dec 2017 09:33 by Lambert.

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12 Dec 2017 18:51 #187384 by Busta
Replied by Busta on topic 30mm raptor spacers
By stability do people mean body roll?

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  • Lambert
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12 Dec 2017 18:59 #187386 by Lambert
Replied by Lambert on topic 30mm raptor spacers
No idea.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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12 Dec 2017 21:05 #187394 by Jezz
Replied by Jezz on topic 30mm raptor spacers
This is the problem with offset wheels.


It's been fettled just a tad.

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  • little boghopper
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12 Dec 2017 22:33 #187396 by little boghopper
Replied by little boghopper on topic 30mm raptor spacers
sorry i,m finding it difficult to understand your question, and grammer, wow and ive had many ales this evening!

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  • Caelite
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13 Dec 2017 02:07 - 13 Dec 2017 02:22 #187398 by Caelite
Replied by Caelite on topic 30mm raptor spacers
11/60:


With that being said, owned Mitsubishi Shogun and L200s. Jimny certainly handles better than them stock, much less push to understeer, similar amounts of roll.

Basic physics implies widening the track will increase stability though, particularly if you are lifting it up, it may lean just as much but actual likely hood of going over would be reduced. Not sure how it works with solid axle geometries, but it should also reduce understeer and oversteer on turn in as it gives the weight of your vehicle more leverage to force the tyre on to the ground.

There are guys in the MX5/BMW community who hum and haw about a 10mm difference in track width, and it's effect on track handling, whilst these are very different cars designed for very different tasks, the extremity of the Jimny 60mm increase in track width must have some noticable effect.
Last edit: 13 Dec 2017 02:22 by Caelite.

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  • Lambert
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13 Dec 2017 05:26 #187400 by Lambert
Replied by Lambert on topic 30mm raptor spacers
The only way it can increase stability is on a side slope where the increased base of support gives greater scope for the centre of gravity to move outward before the car falls over. For road handling the mounting points of the suspension are not being moved further out so the centre of roll remains the same. It may be that there's slightly more downward force applied to the outside tyre but it is a fractional amount. If you are wanting to improve the road manners of a Jimny then more and better results than spacers can be found in good quality dampers and better quality tyres. I use Ermintrude as much as a go cart for the dales as I do for a farm truck and trust me, with decent tyres I am able to regularly confound the expectations of the car club i run with, not on the drags or even A roads but up in the hills Ermintrude shines.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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13 Dec 2017 08:46 #187406 by Busta
Replied by Busta on topic 30mm raptor spacers
That is what I was thinking, it only changes the point at which your wheels leave the road. It would seem lots of people have problems with their Jimnys going up on 2 wheels all the time?
The following user(s) said Thank You: Lambert

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13 Dec 2017 18:01 #187416 by little boghopper
Replied by little boghopper on topic 30mm raptor spacers
i went out shooting today, over fields, tracks rivers and the like, and couldnt see out of the side windows instantly with mud, mud flaps i,m thinking needed, think i,m just going to take the spacers off !! ebay busta!

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13 Dec 2017 19:31 #187422 by Busta
Replied by Busta on topic 30mm raptor spacers
Muddy door handles too. Bet it didn't fall over though :p

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  • Caelite
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13 Dec 2017 21:06 #187426 by Caelite
Replied by Caelite on topic 30mm raptor spacers
Ok, just made a bloody massive post talking about the translation of cornering forces into sprung mass and how, at least based on my knowledge of IFS/IRS suspension more mechanical grip should be offered when the distance between your Sprung/unsprung mass pivots and the centre of your tyre is increased. Clicked post to be told that my session had timed out, much profanity ensued.

Long and short of it being, because cornering forces are felt as a moment of force (a torque), when translating between the sprung mass (body, engine, beer belly etc) to unsprung mass (tyres, wheels, axle) the distance between the point of pivot (shocks/springs) and the centre of your tyre matters. With greater distance it allows for more of the torque to be translated into vertical forces, offering more 'weight' and thus more mechanical grip to tyres. As a general rule of thumb, for on road/track geometry setups a wider track, particularly in the front leads to a greater degree of mechanical grip and stability in corners (with a bucket load of *** relating to camber, scrub radius, tyre rigidity and other factors). This is why track widths are so heavily regulated in motorsport. Whilst I believe a solid axle design will have more limited effects when compared to an IFS/IRS setup, based on empirical evidence of looking at many road bias solid axle setups (american race trucks, older muscle cars etc), greater than stock levels of track width seem to be a recurring theme.

Man... all this effort is going to result in my Jimny getting thrown around Knockhill in place of the Mazda to test various setups :P

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