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Quick question about the drop

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Old Oct 18, 2009 | 06:56 PM
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Quick question about the drop

Hi all

Bilsteins on a 2006 IX.

I had the car lowered from shop and after clocking up 500 miles to let the springs settle, it measures 26 inches from the top wheel arch to the ground - a drop of 1.8".

Is this too low/safe for my bilsteins?

car is relatively stock, 50/50 track and street
springs are progressive wound but im unsure of the spring rates.

can anyone help?

Thanks
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Old Oct 18, 2009 | 06:58 PM
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From: somewhere testing various tires, brakes, and suspensions.
Bilstein MR + Springs? Bilstein PSS9s?

https://www.evolutionm.net/forums/ev...ead-links.html
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Old Oct 18, 2009 | 08:23 PM
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Originally Posted by SmikeEvo
Bilstein MR + Springs? Bilstein PSS9s?

https://www.evolutionm.net/forums/ev...ead-links.html
stock bilsteins (same as mr bilsteins) and just replacement lowering springs.

im just worried that the height being so low might ruin my shocks
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Old Oct 18, 2009 | 08:34 PM
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It sounds like you have some Tein S-tech springs. Those springs reduce
the factory strut usable stroke quite a bit. Which means it is only a matter
of time till all the struts and or shocks blow out. If you want a near two inch
safe drop then a set of coilovers are in your future.
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Old Oct 18, 2009 | 08:44 PM
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Yeah, at a minimum it would be nice to know what springs were installed.
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Old Oct 19, 2009 | 04:37 AM
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From: somewhere testing various tires, brakes, and suspensions.
MR Bilsteins on some unknown spring that lowers -1.8 is too low.
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Old Oct 19, 2009 | 12:38 PM
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thanks for the reply guys

the springs are a 45mm drop on the front from standard height and the rear are 30mm drop from standard

the springs are these http://www.kingsprings.com.au/

- have just emailed for the spring rates.

measuring from the ground to the sideskirts (front wheel end) measures 170mm of ground clearance.

Looks - a good drop but not so low that my 18" wheels sink into the guards.

the other option is the 35mm front and 20mm rear lowering springs - these are firmer though

thoughts now?
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Old Oct 19, 2009 | 01:35 PM
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From: somewhere testing various tires, brakes, and suspensions.
Still too low.
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Old Oct 19, 2009 | 03:40 PM
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is 170mm ground clearanace from the front side skirt still too low?

is there an ideal?

thanks
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Old Oct 19, 2009 | 03:56 PM
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From: somewhere testing various tires, brakes, and suspensions.
Would not go below -1.4 up front.
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Old Oct 19, 2009 | 05:20 PM
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thanks for that SmikeEvo

Just had the specs sent to me

the springs i have in now are
Front 215lb
rear 230lb

this gave drop of about 1.6" in front

the other option - the springs i had in my other evo which also fit this are
front 235lb
rear 260lb

these springs with kyb evo 8 struts gave 1.3"(ish) in the front.

distance from top of wheel guard to the centre of wheel/hub is 13" - which from a search the results were that this was ideal??

Last edited by R0b; Oct 19, 2009 at 10:59 PM.
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Old Oct 20, 2009 | 04:36 AM
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From: somewhere testing various tires, brakes, and suspensions.
Thats too soft and too low. They will blow your struts.

Second set: the drop is less extreme, but they need more rear rate. The car would push with those rates.
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Old Oct 20, 2009 | 12:41 PM
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thanks SmikeEvo

Just wondering, the ride at the moment is about where i want it in terms of comfort. with increased spring rates, technically wouldnt this mean that my ride will harden back to the old kyb strut feel?
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Old Oct 21, 2009 | 12:36 AM
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heres a pic of the car from the side




heres a picture from the back looking at the control arm


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Old Oct 21, 2009 | 05:52 AM
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From: somewhere testing various tires, brakes, and suspensions.
Originally Posted by R0b
thanks SmikeEvo

Just wondering, the ride at the moment is about where i want it in terms of comfort. with increased spring rates, technically wouldnt this mean that my ride will harden back to the old kyb strut feel?
There is a trade off. To lower, increase rates, will change some of the ride characteristics. The feel will still be better than the KYBs. Swifts are also progressive. They have a lower starting rate for the first inch then ramp up to full stiffness. Sports were very comfortable on the street and still fun on the track.
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