Nismo R-tune Suspension For R34 Gtt - Setting For Height & Firmness

[driftmeister]

I just installed on my ride and playing with the setting. The R-Tunes has 4 setting (front) and 8 settings (rear) with a height adjustment of +-20mm.

My problem is that i find the rear is quite firm (set at 4) but gets bouncy when on freeway. If i set it less than 4 the bouncy effect will get worse (sometimes u get double or triple bounce) plus the bouncing effect is fast & short which really shake my kidney to bits. The front was set at no.1 but now i like it when it's no.2 setting where the turn in is very sharp and ride compliance has a nice firmness to it.

My question is how can i get the non of the bouncy effect of the front & match it for the rear?

Does the ride height has anything to do with the compliance of the bouncy effect. Since this is a full coilover suspension, should i increase the height of the rear (so the spring will be more firm) then set it slightly softer setting like 2 or 3? I was advice to increase the setting to 5 or 6 which help reduce the bouncy effect but the ride now is quite hard for everyday driving.

Appreciate anyones help who know coilover for the R-Tunes.

[nuffsaid]

Bounciness if probably the high spring rates on the R-tune setup.

[Blitz]

Bounciness if probably the high spring rates on the R-tune setup.

Im pretty sure the R-Tune spring rates are quite stiff.

It may be worth taking the car to a reputable suspension workshop and having the setup 'tuned'

[driftmeister]

Yes the spring rates is 9kg (F) and 8kg ® which is quite hard so the adjusting height/firmness is the only way for me now.

I try using the same ride height and adjust the tire presure higher 36PSI all round and lower the setting to 1 for front and 3 for Rear. Less bounce and the car handling felt better. Btw im using Toyo T1R tires which has soft sidewalls, so pumping up the pressure make the turn in sharper.

One last question, would the ride height of the coilover when i raise it will stiffen it up (coil spring get more compress)?

Appreciate everyone's feedback.

[driftmeister]

Hi Guys

Just checking what should the ride height be for 34 GTT with coilover? I find the rear look slightly lower than the front. Any advice is really appreciated.

[n15m0]

I believe SK's optimum recomendations are 355mm front and 345 rears measured from center of wheel to guard.

I've got tein super streets and have them at 350mm front and 340 rears...

Looks wise, the fronts could still do with a tad more lower, but any lower would mean more camber wear on the tires without bolting on a camber kit front n rear.

[driftmeister]

I believe SK's optimum recomendations are 355mm front and 345 rears measured from center of wheel to guard.

I've got tein super streets and have them at 350mm front and 340 rears...

Looks wise, the fronts could still do with a tad more lower, but any lower would mean more camber wear on the tires without bolting on a camber kit front n rear.

Thanks Nismo for the feedback.

My current chamber for front is 1.6 FL & 1.9 FR and Rear for both is 2.5. Just wondering why is the rear set lower? Would the handling be neutral, understeer or oversteer? Presume my tire pressure is set at 36 PSI all round. The current setting for the shock front is 3 (4 is max) and rear is 6 (Max is 8). Im trying to set the car to neutral. Appreciate your great assistance & advice.

[driftmeister]

Just checked my ride height for the R-Tune Nismo.

Front is 358mm & Rear is 343mm.

Do you thing this would make much difference in just a few mm from SK setting? That's why i could slightly see the rear to be much lower than the front. Need advice. Thx in advance.

[nuffsaid]

I have them on 345mm all around, they used to be on 335-340mm.

Almost no noticeable difference after raising the car up.

[n15m0]

Thanks Nismo for the feedback.

My current chamber for front is 1.6 FL & 1.9 FR and Rear for both is 2.5. Just wondering why is the rear set lower? Would the handling be neutral, understeer or oversteer? Presume my tire pressure is set at 36 PSI all round. The current setting for the shock front is 3 (4 is max) and rear is 6 (Max is 8). Im trying to set the car to neutral. Appreciate your great assistance & advice.

The rear is set lower because the rear guards are lower than the front. We measure from center of wheel to guard yeah? So with those recommended settings the car is pretty much level. I have seen a lot of ppl go the same height all round as well...not much harm I guess. I'm looking at lowering my fronts maybe another 10mm coz it still looks high from the front.

[driftmeister]

The rear is set lower because the rear guards are lower than the front. We measure from center of wheel to guard yeah? So with those recommended settings the car is pretty much level. I have seen a lot of ppl go the same height all round as well...not much harm I guess. I'm looking at lowering my fronts maybe another 10mm coz it still looks high from the front.

I notice that the front is high too (vizually) but the front coilover doesn't have any pillow springs. Do you think the ride will be more harder/softer or there is no effect at all other than for looks? I understand that the chamber will change to be more negative though. So far seeing all the japanese magazine & all Hyperev GTT magazine, they all seem to set the front quite low almost a 1 or 2 finger gap. Anything to do with our FR effect to compare to a GTR (AWD)?

[adznight]

I'm just about to pull a set of these out from my car. I found that they were quite good and not bouncy at at, stiff if anything. Question - do you know what end of the scale is stiffer? The low end of the scale 1, or the high end 8?

[Beer Baron]

Are you sure they are R-Tune? R-Tune have the remote canisters and have seperate bump and rebound adjustment. 20 levels of bump adjustment and 30 of rebound giving a total of 600 settings per shock?

they look like these (see the gold knobs at the top, and black ones at the bottom):

[adznight]

Are you sure they are R-Tune? R-Tune have the remote canisters and have seperate bump and rebound adjustment. 20 levels of bump adjustment and 30 of rebound giving a total of 600 settings per shock?

they look like these (see the gold knobs at the top, and black ones at the bottom):

I think you'll find they are R34 GTR R-tunes, not GT-T

http://www.moh.co.jp/category/detail?itemi...3&cateid=18

[Beer Baron]

actually they are 32 GTR R-Tunes. (mine).

I didn't know the ones for GTT used different dampers. I just assumed they used the different length, and different attachment style. but I guess they use the different dampers too. my bad. so they just have 1 type of adjustment?

[adznight]

Hehe, well close

Yeah it's just height and damp settings. They are built by KYB and based on the AGX range.

http://www.kyb.com/products/detail.php?ID=4

[driftmeister]

I think you'll find they are R34 GTR R-tunes, not GT-T

http://www.moh.co.jp/category/detail?itemi...3&cateid=18

Mine had the helper springs. Iam trying to get the balance feel for the rear which is either too bouncy (soft) or firm. The front feels compose & compliant on most surface when set no.2 setting. I'm curious, let just say front has 4 setting & rear 8 setting, if i set front no.2 does the rear has to be no.4 to balance it up?

[adznight]

Good question, I'm not too sure either. Are your springs black or silver? One of the vic guys also has these and his are black, mine are silver. I think there must be different spring rates? Mine also have the helper springs.

[driftmeister]

Good question, I'm not too sure either. Are your springs black or silver? One of the vic guys also has these and his are black, mine are silver. I think there must be different spring rates? Mine also have the helper springs.

Mine is Silver. Ilike it when the rear is at no.6 when i plan to drive in twisty journeys. But when come to city driving, it's a little too firm & with very short travel suspension. DO you guys reckon if i raise the rear like 10mm more will make any difference on the compliant rate?

[Ronin 09]

actually they are 32 GTR R-Tunes. (mine).

I didn't know the ones for GTT used different dampers. I just assumed they used the different length, and different attachment style. but I guess they use the different dampers too. my bad. so they just have 1 type of adjustment?

beer bottom, have you set yours up and what spring rates etc are you running...

they're the same as these I expect...