Anyone running TRD springs with stock struts? - Page 2 - Toyota Yaris Forums

tristan · 03-27-2009, 12:25 AM

i didn't cut the bump stops when i installed my trd springs and haven't had any problems

Castaway · 03-27-2009, 08:14 AM

I have TRD springs and stock struts, dealer installed, and my suspension never bottomed out, and i live in Quebec city! I don't understand why stiffer springs (TRD) would be more likely to hit the bump stops compared to stock; even more if stock struts are longer?!
Enlighten me, please

RomGrr · 03-27-2009, 10:37 PM

Consider that the springs control the ride height. Therefore, with a shorter spring, the stock-sized strut will face a larger natural compression, even while parked. Less space between the wheel and the strut tower (which is the objective when lowering the car) means that the stock strut has to compress just to fit where it is supposed to. Shorter (and usually stiffer) struts do not have this problem because they were designed for lowered applications. There is no doubt that lowering springs place a higher burden on the stock struts. The stock struts WILL wear out faster because of this. Cutting the bumpstop is supposed to reduce the load placed on the stock strut by increasing the amount of room the strut has between the wheel and the bottom of the strut tower.

Make sense?

BLAZINBLUEVITZ · 03-29-2009, 03:49 PM

Quote:

Originally Posted by RomGrr

There is no doubt that lowering springs place a higher burden on the stock struts. The stock struts WILL wear out faster because of this. Cutting the bumpstop is supposed to reduce the load placed on the stock strut by increasing the amount of room the strut has between the wheel and the bottom of the strut tower.

Make sense?

IN THEORY yes, but stock toyota is tokico rebadges i think. just like new 2009 rav4 sport has tokico blues on it from factory....

spookz · 03-29-2009, 06:13 PM

Quote:

Originally Posted by BLAZINBLUEVITZ

IN THEORY yes, but stock toyota is tokico rebadges i think. just like new 2009 rav4 sport has tokico blues on it from factory....

Someone had stock struts for sale the other day and said they were by KYB (had it stamped on the strut).

Castaway · 03-29-2009, 11:02 PM

Quote:

Originally Posted by RomGrr

Consider that the springs control the ride height. Therefore, with a shorter spring, the stock-sized strut will face a larger natural compression, even while parked. Less space between the wheel and the strut tower (which is the objective when lowering the car) means that the stock strut has to compress just to fit where it is supposed to. Shorter (and usually stiffer) struts do not have this problem because they were designed for lowered applications. There is no doubt that lowering springs place a higher burden on the stock struts. The stock struts WILL wear out faster because of this. Cutting the bumpstop is supposed to reduce the load placed on the stock strut by increasing the amount of room the strut has between the wheel and the bottom of the strut tower.

Make sense?

Hum, not sure... maybe i misunderstood the inner workings of the shocks...

About strut wear, i'll wait and see ;)

Edward Chew · 04-22-2009, 11:22 AM

Hi guys,

I'm running on Sustec lowering spring on stock strut and recently there are sound coming from the front when going down parking or during the compression of spring. Inspected the spring and found no sign of spring banging itself.

So got a pro mechanic to check and he found out that my car actually sitting on the bump stop! When the car rested on ground, we can't even more the bump stop up or down. Now I know why my car higher than the rear, the car was sitting on the bump stop all these while!

Will get it cut tomorrow and see what's the outcome. And good thread here strenghtening our doubt.

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03-27-2009, 12:25 AM	#19
tristan it's been a while View User's Garage Drives: 2009 liftback Join Date: Oct 2008 Location: Orlando, FL Posts: 110	i didn't cut the bump stops when i installed my trd springs and haven't had any problems

03-27-2009, 08:14 AM	#20
Castaway View User's Garage Drives: 2008 Yaris hb 2d Join Date: Dec 2008 Location: Quebec city Posts: 40	I have TRD springs and stock struts, dealer installed, and my suspension never bottomed out, and i live in Quebec city! I don't understand why stiffer springs (TRD) would be more likely to hit the bump stops compared to stock; even more if stock struts are longer?! Enlighten me, please

03-27-2009, 10:37 PM	#21
RomGrr View User's Garage Drives: 2007 Yaris HB Join Date: Feb 2009 Location: Parts Unknown Posts: 24	Consider that the springs control the ride height. Therefore, with a shorter spring, the stock-sized strut will face a larger natural compression, even while parked. Less space between the wheel and the strut tower (which is the objective when lowering the car) means that the stock strut has to compress just to fit where it is supposed to. Shorter (and usually stiffer) struts do not have this problem because they were designed for lowered applications. There is no doubt that lowering springs place a higher burden on the stock struts. The stock struts WILL wear out faster because of this. Cutting the bumpstop is supposed to reduce the load placed on the stock strut by increasing the amount of room the strut has between the wheel and the bottom of the strut tower. Make sense?

04-22-2009, 11:22 AM	#25
Edward Chew I've made a post! Drives: Vios Join Date: Apr 2009 Location: Malaysia Posts: 1	Hi guys, I'm running on Sustec lowering spring on stock strut and recently there are sound coming from the front when going down parking or during the compression of spring. Inspected the spring and found no sign of spring banging itself. So got a pro mechanic to check and he found out that my car actually sitting on the bump stop! When the car rested on ground, we can't even more the bump stop up or down. Now I know why my car higher than the rear, the car was sitting on the bump stop all these while! Will get it cut tomorrow and see what's the outcome. And good thread here strenghtening our doubt.