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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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Thread: Do the rear Koni springs sit this bad? Reply to Thread
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Topic Review (Newest First)
10-27-2009 10:36 AM
christian900se Ok, I was just checking. I didn't mean that the rates would drastically be uprated, but rather uprate it a bit more at least as an option.
10-27-2009 06:37 AM
GenuineSaab
Quote:
Originally Posted by christian900se View Post
On topic:

What are the disadvantages about increasing the spring rate? (Obviously within reason.)
basic answer: Overloading the tires in compression over bumps, too harsh ride. At the most extreme there is no compression to absorb the irregularities of the road and you end up bouncing over them.
10-26-2009 06:26 PM
viggenkid
Quote:
Originally Posted by christian900se View Post
On topic:

What are the disadvantages about increasing the spring rate? (Obviously within reason.)
stiffer ride, lower center of gravity, less body roll.

there needs to be a balance of all the components to prevent premature wear or negative effects to the handling characteristics. (excessive understeer/oversteer)

stiffer spring rate can also reduce bottoming out.
10-26-2009 06:23 PM
viggenkid lol i think i had the cruise set at like 70-75 the whole time.

that ain't that fast man.
10-26-2009 06:22 PM
christian900se On topic:

What are the disadvantages about increasing the spring rate? (Obviously within reason.)
10-26-2009 06:21 PM
christian900se Hahaha, I think he secretly likes the car being that well put together. On the way to Carlisle, there were a few times where I realized I had fallen behind the group (thanks to you being a speed demon) and had to lay into it to catch up. It was a good excuse to get up to 100, maybe a bit more and he didn't complain. Thats about the fastest I think I will ever go with my dad in the car lol.
10-26-2009 01:08 PM
viggenkid IIRC i was on your team

your dad should work out more. saabs are not good for offroading.
10-26-2009 01:07 PM
christian900se But- me and my dad did beat you at flip cup IIRC.
10-26-2009 01:06 PM
christian900se
Quote:
Originally Posted by viggenkid View Post
you dad needs to grow some balls.
He is scared of the ominous torque steer. I remember when he first drove it after stage 5 and said "This car is way too fast Christian." and I asked him why is that? "I tried accelerating and it nearly pulled me off the road, very dangerous."
10-26-2009 01:04 PM
viggenkid you dad needs to grow some balls.
10-26-2009 01:02 PM
christian900se
Quote:
Originally Posted by viggenkid View Post
yeah he claimed that he couldn't drive anywhere without bottoming out. i've never had a issue though.

maybe he still had those pesky midcar mudflaps on that tend to scrap over everything?
Nope, I removed those years ago. It wasn't my fault they were removed, the lowering springs were installed but the fronts weren't installed properly thanks to a horrible shop but the rears were fine; I installed those. Basically, my dad brought it down to the local Saab dealership while I was away at school and asked them to replace the strut mounts and put in new OEM springs since the car was "too low".
10-26-2009 12:22 PM
viggenkid yeah he claimed that he couldn't drive anywhere without bottoming out. i've never had a issue though.

maybe he still had those pesky midcar mudflaps on that tend to scrap over everything?
10-26-2009 11:53 AM
mvadenais
Quote:
Originally Posted by christian900se View Post
Hope to get some form of resolution regarding the spring rate issue. My car before it went back on new OEM springs (retained the Koni shocks).

just curious, you went back to stock springs after running lowering springs?
10-26-2009 10:23 AM
Ice Man ^ Cool. Good to know.
10-26-2009 09:45 AM
Champ Thank you sir! Figured it was an easy explanation.
10-26-2009 09:31 AM
liketheword
Quote:
Originally Posted by GenuineSaab View Post
The rear springs in the koni kit are just fine. Look just like the H&R and most others.. (BG excluded, they are a little too low rate.) Their engineers know a little more than some forum specialist.. Anyway.

You need a certain length spring to get it to not fall out when at full droop. This is controlled by the dampers on the NG. But to get a car to ride height it takes a certain spring rate. But what if you cannot get to this height at a rate that will fit in the hole unloaded? You make the spring dual rate or add some "dead" coils, that is the only "work" to keep the thing in the hole unloaded. The rest of the time the other coils handle the main "work" Understand? The 9-3 SS uses this from the factory.
Makes sense. Thanks! A little less sarcasm please

How about info on spring rates?
10-26-2009 09:24 AM
GenuineSaab The rear springs in the koni kit are just fine. Look just like the H&R and most others.. (BG excluded, they are a little too low rate.) Their engineers know a little more than some forum specialist.. Anyway.

You need a certain length spring to get it to not fall out when at full droop. This is controlled by the dampers on the NG. But to get a car to ride height it takes a certain spring rate. But what if you cannot get to this height at a rate that will fit in the hole unloaded? You make the spring dual rate or add some "dead" coils, that is the only "work" to keep the thing in the hole unloaded. The rest of the time the other coils handle the main "work" Understand? The 9-3 SS uses this from the factory.
10-26-2009 08:07 AM
christian900se Hope to get some form of resolution regarding the spring rate issue. My car before it went back on new OEM springs (retained the Koni shocks).

10-26-2009 08:05 AM
stevbd x. 2. The car sits more level, so the front air dam lifts up slightly. With Eibachs on a Viggen, the front sits just about the same as stock.
10-26-2009 07:24 AM
Champ
Quote:
Originally Posted by Ice Man View Post
I wonder how the car would sit with just the rears lowered with those eibach springs shown above. I'm happy with the front oem wheel gap. I'm also afraid if I go any lower in the front I will be scraping the front bumper a LOT more.

^ Thanks for the input Robert. All my friends and family are telling me to keep it too.

P.S. I got the 'Saab wave' from an older guy in 9-5 this morning. That was nice.
I hardly scrape at all, when you lower the back end it actually picks up the front bumper a tad.

The front doesn't drop nearly as much as the back.
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