Thoughts on this suspension
11 December 2017, 04:45 PM
#32
Looking at replacement suspension for my Jdm Widetrack Sti, what’s people’s thoughts on these?
http://www.scoobyparts.com/suspensio...sports-ezi-fit
http://www.scoobyparts.com/suspensio...sports-ezi-fit
12 December 2017, 11:28 AM
#39
Stock blob/hawk STI 223/195 (217/171 at ride height)
STI pinks 257/217 minus 28mm front (223 at front ride height)
Pedders widetrack STI 210/214 minus ??mm front
Prodrive widetrack STI 234/223 minus 18mm front
WA/A2 245/223 minus 25mm front (front and rear dual-rate springs - linear in their operational range)
Stock WRX saloon 163/119
Pedders WRX 157/128
My concern would be lowering the ride height and not increasing the spring rates. As you have reduced the bump travel - the bump stops will become critical, in thier length and durometer.
STI pinks 257/217 minus 28mm front (223 at front ride height)
Pedders widetrack STI 210/214 minus ??mm front
Prodrive widetrack STI 234/223 minus 18mm front
WA/A2 245/223 minus 25mm front (front and rear dual-rate springs - linear in their operational range)
Stock WRX saloon 163/119
Pedders WRX 157/128
My concern would be lowering the ride height and not increasing the spring rates. As you have reduced the bump travel - the bump stops will become critical, in thier length and durometer.
Last edited by 2pot; 12 December 2017 at 11:31 AM.
12 December 2017, 11:37 AM
#40
Scooby Regular
Stock blob/hawk STI 223/195 (217/171 at ride height)
STI pinks 257/217 minus 28mm front (223 at front ride height)
Pedders widetrack STI 210/214 minus ??mm front
Prodrive widetrack STI 234/223 minus 18mm front
WA/A2 245/223 minus 25mm front (front and rear dual-rate springs - linear in their operational range)
Stock WRX saloon 163/119
Pedders WRX 157/128
My concern would be lowering the ride height and not increasing the spring rates. As you have reduced the bump travel - the bump stops will become critical, in thier length and durometer.
STI pinks 257/217 minus 28mm front (223 at front ride height)
Pedders widetrack STI 210/214 minus ??mm front
Prodrive widetrack STI 234/223 minus 18mm front
WA/A2 245/223 minus 25mm front (front and rear dual-rate springs - linear in their operational range)
Stock WRX saloon 163/119
Pedders WRX 157/128
My concern would be lowering the ride height and not increasing the spring rates. As you have reduced the bump travel - the bump stops will become critical, in thier length and durometer.
12 December 2017, 02:16 PM
#45
Not as simple as it seems then, I have noticed some sitting low at the back, powerwrx had some and they were a bit to close for comfort at the rear.
The more I look at miester coilovers the more I think that’s the way to go, I had bc’s before and they were rubbish for me, granted I didn’t know the spring rates but even chevron couldn’t make them comfortable.
Siv
The more I look at miester coilovers the more I think that’s the way to go, I had bc’s before and they were rubbish for me, granted I didn’t know the spring rates but even chevron couldn’t make them comfortable.
Siv
Inverted version for saloon (really need the internal bump stops changing):
321002 KYB Front Right Shock Absorber fit IMPREZA 321002
321003 KYB Front Left Shock Absorber fit IMPREZA 321003
324004 KYB Rear Right Shock Absorber fit IMPREZA 321004
324005 KYB Rear Left Shock Absorber fit IMPREZA 321005
Non-inverted version for saloon:
324030 KYB Rear Right Shock Absorber IMPREZA 324030
324031 KYB Rear Left Shock Absorber IMPREZA 324031
324032 KYB Front Right Shock Absorber IMPREZA 324032
324033 KYB Front Left Shock Absorber IMPREZA 324033
STI springs fit the inverted struts.
WA/A2, STI-rate, springs and matching bump stops, fit both the inverted and non-inverted struts, due to their longer free-length.
12 December 2017, 08:46 PM
#48
KYB AGX * 734034, 734035, 734036, 734037
KYB Ultra SR
Feal FPS http://fealsuspensionstore.com/produ...-perch-struts/ Contact sales@wisefab.com they're in Estonia. They are (were) the European distributor of Feal USA
Koni Inserts
Tokico D * https://www.oakos.com/TOK-DSP-10.htm
*You'd need spacers on these rear struts, if your using blob/hawk rear top mounts.
www.pedders.co.uk/sites/Pedders/5052%20fitment%20instructions..pdf
Scooby921 Strut Spacers | FastWRX.com The scooby921 version spacer are of a superior material.
Last edited by 2pot; 12 December 2017 at 09:15 PM.
04 January 2018, 09:29 PM
#50
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Well, just to add my 2 pence-worth....
I went for the Ezi-Fit Pedders suspension on my widetrack Hawk STi, which was fitted in November. They replaced the stock Prodrive red springs and dampers. In my case there was no appreciable difference in ride height (good for me since the RB320 airdam on my car is already low enough).
The immediate impression I got is how smooth the car is over imperfections in the road surface compared to the stock setup. It's not night and day different, but definitely noticeable and for me is a big plus point. It's improved my enjoyment of driving on b-roads and makes the car nicer as a daily runner.
What impressed me even more is despite the improved comfort the car is held flat under hard cornering (towards the limit of grip). I recently got to test it on my favourite S bend, taken at 70 mph, where the car is first loaded in one direction, then immediately switching to the other side. The car stayed flat.
In my view the Pedders struts are an excellent choice for fast road use, especially for their price. On UK roads you need a setup that will absorb bumps without upsetting the balance of the car during cornering. To maintain grip you want the tyres to stay planted on the road, so you want some compliance in the suspension. I had KW V3 coilovers on one of my previous scoobies (at considerable cost). I'd pick the Pedders over those without question....for fast road use.
Now, if you want to put the car on track frequently, or you want to lower it, then obviously, that's where coilovers would be the way to go, but don't buy cheap crap.
Note - I too was worried about the reported knocking of the Pedders suspension. I've been listening for it over the last 2 months. I admit, every now and again, I notice it. Must be down to the specific road surface and speed creating a resonance or something. It's not something I encounter often and the car has been driven as a daily driver since the suspension change. I have no concerns.
I went for the Ezi-Fit Pedders suspension on my widetrack Hawk STi, which was fitted in November. They replaced the stock Prodrive red springs and dampers. In my case there was no appreciable difference in ride height (good for me since the RB320 airdam on my car is already low enough).
The immediate impression I got is how smooth the car is over imperfections in the road surface compared to the stock setup. It's not night and day different, but definitely noticeable and for me is a big plus point. It's improved my enjoyment of driving on b-roads and makes the car nicer as a daily runner.
What impressed me even more is despite the improved comfort the car is held flat under hard cornering (towards the limit of grip). I recently got to test it on my favourite S bend, taken at 70 mph, where the car is first loaded in one direction, then immediately switching to the other side. The car stayed flat.
In my view the Pedders struts are an excellent choice for fast road use, especially for their price. On UK roads you need a setup that will absorb bumps without upsetting the balance of the car during cornering. To maintain grip you want the tyres to stay planted on the road, so you want some compliance in the suspension. I had KW V3 coilovers on one of my previous scoobies (at considerable cost). I'd pick the Pedders over those without question....for fast road use.
Now, if you want to put the car on track frequently, or you want to lower it, then obviously, that's where coilovers would be the way to go, but don't buy cheap crap.
Note - I too was worried about the reported knocking of the Pedders suspension. I've been listening for it over the last 2 months. I admit, every now and again, I notice it. Must be down to the specific road surface and speed creating a resonance or something. It's not something I encounter often and the car has been driven as a daily driver since the suspension change. I have no concerns.
04 January 2018, 09:35 PM
#51
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Update from another thread:
<<There was a Prodrive red 05 sti spring set S05/D5/001 - Compared to a stock STI they were 18mm lower at the front and 8mm lower at the rear.>>
So the setup I replaced was already lower than stock. My red springs had the above code on them.
<<There was a Prodrive red 05 sti spring set S05/D5/001 - Compared to a stock STI they were 18mm lower at the front and 8mm lower at the rear.>>
So the setup I replaced was already lower than stock. My red springs had the above code on them.
04 January 2018, 10:25 PM
#52
What are the wheel centre up to metal arch (not the plastic liner) measurements? And how much fuel in the tank, when you take the measurements.
If it's difficult to get at the wheel centre (due to the wheel design), or you want to do it more accurately, use this method:
Hook the tape on the wheel rim nearest the ground. Measure vertically upwards, across the wheel centre, to the metal arch = x
Then, hook a tape on the wheel rim, measure across the wheel centre to the outer edge of the rim, on the opposite side of the wheel - divide this measurement by 2 = y (y is, obviously, the same on all 4 wheels).
x minus y = ride heights
There will probably be a 5mm, side to side, ride height difference - this is normal.
05 January 2018, 06:02 PM
#57
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2 Pot, I have the data, measured using method 2 (more accurate)
Front Nearside = 588-475/2 = 350.5
Front Offside = 586-475/2 = 348.5
Rear = 571-475/2 = 333.5 (same both sides)
I didn't measure each wheel. I'm assuming that the alloys should be 475mm across in all cases.
What does this tell us?
)Front Nearside = 588-475/2 = 350.5
Front Offside = 586-475/2 = 348.5
Rear = 571-475/2 = 333.5 (same both sides)
I didn't measure each wheel. I'm assuming that the alloys should be 475mm across in all cases.
What does this tell us?
07 January 2018, 10:29 PM
#58
Scooby Regular
It tells us your 35mm lower at the front and 15mm at the rear. Should "look" ok and make the car lean into the front corner when cornering on a trailing throttle, rather than lean into the back corner. You should find a bit of "lift off" oversteer but not too much.
08 January 2018, 11:46 AM
#59
I haven't measured the Pedders STI springs and dampers.
My findings, on other struts, have been:
Any lower than 360mm at the front, and you've very little bump travel left. So, the bump stop length and durometer selection become critical.
The RB320 ran inverted struts, with the front ride height being 31mm lower than the stock widetrack STI, but they had clever damping, in combination with short, progressive, bump stops.
IMHO, any lower than 350mm (or above 370mm) at the rear, in combination with a 360mm front, adversely effects handling, on a road car.
I think it's excellent, that Pedders have gone to the effort, to sell non-inverted STI widetrack struts. Their use of off-set front top mounts, in the kit, is a great idea.
Some helpful reading:
Some discussions about rake and inverted damper design #129 on.
https://www.scoobynet.com/177279-dam...s-forum-5.html
https://www.scoobynet.com/suspension...-allround.html
My findings, on other struts, have been:
Any lower than 360mm at the front, and you've very little bump travel left. So, the bump stop length and durometer selection become critical.
The RB320 ran inverted struts, with the front ride height being 31mm lower than the stock widetrack STI, but they had clever damping, in combination with short, progressive, bump stops.
IMHO, any lower than 350mm (or above 370mm) at the rear, in combination with a 360mm front, adversely effects handling, on a road car.
I think it's excellent, that Pedders have gone to the effort, to sell non-inverted STI widetrack struts. Their use of off-set front top mounts, in the kit, is a great idea.
Some helpful reading:
Some discussions about rake and inverted damper design #129 on.
https://www.scoobynet.com/177279-dam...s-forum-5.html
https://www.scoobynet.com/suspension...-allround.html
Last edited by 2pot; 08 January 2018 at 11:59 AM.
08 January 2018, 02:04 PM
#60
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Ah ha, so, from your 2nd link it can be seen that since my measured ride height difference, front to back, is nominally 16mm (lower at the back), my car is in fact, level. From the thread, this looks good to me from a performance perspective. 
Regarding ride height, I would maintain that my car has not been lowered in respect of the Pedders setup cf earlier configuration (Prodrive red springs). Reading the articles, the only issue is that given the spring rates for the Pedders suspension are lower than for the Prodrive springs (which is supported by my observations from driving), am I now at risk of bottoming out? Perhaps the Pedders springs have a progressive spring rate to prevent this?
After 2 months of driving, I can't report any such problems. Not that I've loaded the car up with people and driven it over poor roads to see if it bottoms out. The other point is that Subaru themselves are recommending Pedders as a replacement for the stock Eibach dampers.
Regarding ride height, I would maintain that my car has not been lowered in respect of the Pedders setup cf earlier configuration (Prodrive red springs). Reading the articles, the only issue is that given the spring rates for the Pedders suspension are lower than for the Prodrive springs (which is supported by my observations from driving), am I now at risk of bottoming out? Perhaps the Pedders springs have a progressive spring rate to prevent this?
After 2 months of driving, I can't report any such problems. Not that I've loaded the car up with people and driven it over poor roads to see if it bottoms out. The other point is that Subaru themselves are recommending Pedders as a replacement for the stock Eibach dampers.