2006 Hawkeye wrx rear struts
18 June 2015, 04:55 PM
#31
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I would also personally not cut the rears either as the PCA kit only comes with shorter front stops and when speaking to Peter he has told me the rears must remain long, his actual response when I asked if I needed shorter rear stops:
No the rear bump stop must remain long. It's required to support the rear spring when carrying extra load and maintain the handling balance of the car. A short rear bump stop would make it understeer more as you build the lateral acceleration in a corner.
No the rear bump stop must remain long. It's required to support the rear spring when carrying extra load and maintain the handling balance of the car. A short rear bump stop would make it understeer more as you build the lateral acceleration in a corner.
18 June 2015, 05:24 PM
#32
The front 50mm (40mm +10mm soft nose) bump stop, that comes with the pca spring set, is for inverted dampers - 12mm rod.
Modrich is already using the 90mm, rear, twin-tube stop. Which, as he knows, doesn't need to be shortened, with the pca wrx springs, for the reasons Peter gave you.
If the rear springs lowered by 15-20mm the I would remove the smallest section. Making the stop 75mm long. Or, as I have done on the classic spring sets, find an alternative rear stop.
Last edited by 2pot; 18 June 2015 at 05:34 PM.
18 June 2015, 06:05 PM
#33
2pot, this has been bugging me, I have the PCA dynamics springs fitted with Excel-Gs on my blob wagon, standard dust covers front and rear with standard rear bump stops.
I also have new 60mm front bump stops fitted to Peters spec, do I need to cut these down? If so, what length do I need to remove? Do I also need to trim the front dust covers?
I also have new 60mm front bump stops fitted to Peters spec, do I need to cut these down? If so, what length do I need to remove? Do I also need to trim the front dust covers?
Having seen Plenty's image of his 60mm stops, they've obviously been working hard and split. It would be interesting to know how old they are.
You could cut the smallest segment off the 60mm stop, giving a 42mm stop.
Slide a tube of protective metal (snip up a drink can) around the 22mm rod and into the bump stop - then get slicing with the bread knife. Rotate the stop, to stay in the best cutting position.
Or better, change to the optimal/febi stop: As, by cutting the oem stop, your diminishing the solid height.
On balance, If you've got 20mm clearance and the stop's nose hasn't split, I'd leave as is.
You don't need to shorten the dust boots.
HTH
19 June 2015, 06:44 PM
#36
At the time I didn't realise that the Febi/Optimal items existed otherwise would have ordered these instead.
I am finding the Prodrive/AGX/WRX bump stop setup too stiff for my requirements, so have ordered a set of Febi bump stops to be fitted to the front in the hope that this will introduce more compliance.
Last edited by plenty; 19 June 2015 at 06:45 PM.
20 September 2015, 09:58 PM
#37
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I thought I would update this thread a bit, so after running the rear KYB none inverted struts for a while I decided to change the fronts too, to have a matching set of brand new non inverted KYB shocks with Prodrive spec springs.
I can confirm those Optimal bump stops work great! So thank you very much 2pot for the info.
The dust boots from the inverted struts seem to work with these too.
I can confirm those Optimal bump stops work great! So thank you very much 2pot for the info.
The dust boots from the inverted struts seem to work with these too.
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