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 Yokohama Advan Neova AD08R tires, brand new just released in Japan

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jaycee1
post Sep 18 2014, 01:43 PM

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QUOTE(overfloe @ Sep 9 2014, 08:30 AM)
the ad08r should take punishment from coilovers.. looks like you overshoot the corner.. night driving, difficult to anticipate the next bend, unless you remember the course.
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Likely so. Video shows that the car is carrying quite a bit of speed. Now, this is no 850KG Iswara. Weight/Car is the issue here. My 900kg Satria corners like a housefly on cheap tires and stockish suspension.

Cant see how much steering angle you are having to put in from the video.

QUOTE(Quazacolt @ Sep 9 2014, 02:08 PM)
ya my current dampers too soft, unable to utilize the tire at all sad.gif
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Soft dampers actually give you more grip. Harder dampers do not necessary give you more grip, it does give you more control to push it to the limit on a SMOOTH track. Try going up sempah on a hard setup and you'd be making a date with the hillside.


jaycee1
post Sep 20 2014, 02:40 PM

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QUOTE(Quazacolt @ Sep 18 2014, 01:54 PM)
my iswara is the older full spec auto, so it had very close to 1 ton (the original paper sheet kerb weight was over 900kg ady iinm), not to mention subwoofer and sound proofing and lotsa stupid snake worm bars.

regardless, it still isn't a 1280+driver 1360 kg inspira no doubt.
and the more speed it carries, the more momentum additional weight will affect.

well that's what RCS is been telling me for my dampers, overall it's the combination of the tires and dampers. if i want to run these tires, i need harder dampers to push the tires to the ground more to deal with road imperfections.

to give an idea, softer tires (particularly sidewall) can deform to road imperfections (lets use a rock as an example), and stay firm on the ground. harder tires like these ad08r has steel plate reinforcement on the sidewall to make it very damn stiff, road imperfections will cause it to "bounce/hop" off from the road and when that happens, that's good bye to grip/traction already, even if it's only for a split second.

not to mention, if it isn't pushed to the ground hard enough, there will be a point where the weight shift/damper rebound will exceed the softer dampers limitations, while you may not realize it as you're having a false sense of grip due to the much grippier r spec compounds the ad08r offers.
it'll be a dangerous situation where you're still having firm grip and then out of a sudden your car is sliding non stop.

you'll probably never see such situation happen in my videos as i have stability control system to limit the car's power/correct any traction lost via braking modulation. However the screeches despite "not so fast" cornering speed (definitely something the ad08r by right should EASILY handle) should be a dead giveaway.

tldr/summary/lesson learned: soft or hard dampers, coilovers with extremely stiff springs, extreme tires (like the ad08r) or semi slicks, you'll need a good overall combination to make things work and not simply dumping the best/most expensive piece and expect miracles to happen. nod.gif
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I understand your take on this.

Unfortunately, not knowing how your Inspira was set up, kind of hard to guess. I think the issue lies something other than just the damper/spring settings. The key element here is we still do not know what sort of steering angle you had to input when it washed wide.

Im going to throw in another spanner. Most wont realise it but how your front behaves sometime depend on a lot of that the rears do. Maybe you are looking at the wrong end of the car. Food for thought.


jaycee1
post Sep 23 2014, 04:57 PM

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QUOTE(nm7 @ Sep 22 2014, 12:26 PM)

i have sat in a Mivec'ed wira before going for a whack in ulu yam... the car was setup to be only slightly lowered and surprisingly a lot of damper travel and not hard like the entire car is bouncing all over the place or unsettles with the slightest un-evenness (if that is a word, spell check is mind f@king me) on the road... so, the car still pitches and rolls quite a bit and doesn't quite stay flat through the turns... but it just hooks on and the driver can step on it mid-turn to get it out of the turn (helped no less by an LSD la)...it's still no stock damper setup but it's soft by today's usual damper setups

the thing is that quite a lot of cars are setup so hard that they got brainwashed that it is the way to go and it gives you a sort of feel that you are driving a fast car... any hints of the car pitching automatically unsettles the drivers nerves...

that ride in that car totally turned my beliefs inside out...
car wash?
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I personally favour a much softer setup. Same experience. i don't need a hard setup as the car is only 900kg. but it corners like a house fly and hooks up mid corner and doesn't understeer unless i go do something mad like keeping the throttle floored throught the turn. The rear can be rotated on a whim to minimize front slip angle so I get even more grip out of the turns. Too bad I still don't have LSD up front.

Now that said, this isn't a stock car, its still quite stiff because I don't have much weight, but I'm essentially still using stock dampers. But in my own setup, I used to make big changes from the front, but now I normally fine tune it with the rear....not the end people usually think about, normally sometimes as simple as rear toe and moving some weight about is all that is needed.

Most people tend to go way too hard to the detriment of comfort and drivability.

I'd say the same thing about power (more accurately too much of it) as well.

As it is, this stock dampered car can be quicker around Dato Sagor than a host of modified Satria GTIs, Mivec'd or GSR Turbo'd Wiras and likely quicker than stock VW GTIs.

QUOTE(nm7 @ Sep 23 2014, 10:24 AM)
dialing in a car is pretty much the same... in terms of methods...

it just what kind of "feel" the are looking for that inspires confidence in them to push it harder... it's just like pasta, some (mostly asians) likes it more cooked while some likes it al dente... it can be the same pasta, same cooking liquid, same method but slightly different cooking time just to get the different results....
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Dialing a car in depends a lot on the driver, the driving style, the car and the surface its driven on. There is no right or wrong way. its nothing to do which setup is faster either...its more to the feel and driving excitement. You may have a setup that is mindblowingly quick but so nervous that you don't enjoy driving it.

 

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