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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Topic Review (Newest First)
04-17-2011 01:32 PM
vayrix
Quote:
Originally Posted by byastremski View Post
you can also just run a helper spring externally to help up your base boost... just go to advanced and get a spring pack... try a couple different ones... make a little metal bracket and attach to where the wastegate bolts up to the housing and run the spring to the swing arm of the turbo... much easier way to do it...
Yes, I've done that already when I thought that only my actuator is a problem. I have "custom" made spring by me
So there is no difference between putting it outside, or putting it inside?
04-16-2011 01:27 PM
byastremski you can also just run a helper spring externally to help up your base boost... just go to advanced and get a spring pack... try a couple different ones... make a little metal bracket and attach to where the wastegate bolts up to the housing and run the spring to the swing arm of the turbo... much easier way to do it...
04-16-2011 01:06 PM
Adrenaline406 From what I understand, the Forge springs are for the bypass/blow-off valve. I'm not sure that the springs for the wastegate actuator and the bypass valve are the same. From the pictures in the platonoff site, the wastegate actuator springs look longer (by almost twice) than the bypass springs that I have laying around. Can anyone confirm that these springs are the same or not?
04-16-2011 06:35 AM
secret ingredient I'm not sure on that, but I think they should be the same if the color is the same. I just tossed my old actuator and put on a newer one from a lower mileage car.
04-16-2011 02:25 AM
vayrix
WGA spring upgrade
Hi,

I saw the actuator spring upgrade on 03.10.2005: Saab NG900 Wastegate Actuator Spring - photo.platonoff.com
And, since I have a spare one with weak spring, I plan to rebuild it.
I cannot find this Nordic spring which is used on platonoff site, but I found forge ones. There are green, yellow, red and blue, rated 5-10, 9-15, 17.5-20, 14-18PSI. Can these be put inside stock T25 WGA?
If so, which one is safe for stage 1, 2 & 3? Stock spring inside actuator is green, as seen on platonoff site, but is this color marking the same as from forge ones?

Cheers!

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