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YOUR RESEARCH40th A.E. Suspension Options
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Install koni yellow
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Performed · outcome unconfirmed
I installed Koni Yellow with the H&R springs from Tire Rack.
Leading evidence: 'Install koni yellow' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Adjust koni yellow shocks' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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I changed my 40th AE setup from the standard US spec M030 to the ROW spec and replaced all the suspension bushing.
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Performed · outcome unconfirmed
I changed my 40th AE setup from the standard US spec M030 to the ROW spec and replaced all the suspension bushing.
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Suggestion
Where on the shock do you adjust the Koni Yellow shocks?
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I've read that the 2004 40th Anniversary Edition suspension is different than stock C2 (i.e., sport suspension - m030 with slightly longer rear springs for the x51 package per The Essential Companion book).
I'm about to hit 75000 miles and I am considering new shocks if not a new suspension package. The rough roads in California are bone jarring. Not sure if new shocks will help or if it's just the roads.
So what are the best options for a more comfortable ride? I don't track the car and 99 percent is highway miles at speeds of 70 plus.
Also is the sport suspension different from ROW and X74? If so how?
Certain parts of I15 from just before Corona to lake Elsinore are pretty poor. Same experience on certain portions of hwy 57 to Orange County.
My girlfriend also complains and doesn't like to be a passenger. She tends to get motion sickness even in other cars.
I'm getting older too and have lower back and neck pain that does not help either.
Not sure if new shocks will make any difference or not.
Don't think the p.o.did any mods, think it is the stock set up.
The car is fine on good road surfaces. But some of the poor surfaces or those with grooves can be bad.
Just bought a 40th AE and the suspension is more..ehhmm .. unforgiving on bumps.
I think they call it ...stiffer.
But better if you wanna go fast round a bend.
In southern central Orange County
http://www.visionmotorsports.com/
is good. Obviously there are others as well.
Do you have standard tire fitment? That can also make a large difference. Tire pressures too.
Otherwise yes, softer springs and shocks.
Best, Paul
Actually Vision is somewhat focused on race prep, you may be able to by stock "take offs" from another customers car? Call Dwayne if Laguna Hills location is handy for you.
I have the standard 18 inch set up and 225s up front, 285s rear.
Example of the bad commute is North I-15 from the Arco a few miles prior to the Lake offramp, through Indian Truck Trail offramp, and then again at Magnolia where the 15 meets the 91.
Any of you who may have come up for the Festival of Speed from San Diego probably experienced what I'm talking about.
If the springs on the 40th AE rear are longer for the X51 setup, does that limit options or will any aftermarket shock or even Euro ROW work for this car?
Thanks for all the other recommendations -- I'll check out the Koni FSD too.
I changed my 40th AE setup from the standard US spec M030 to the ROW spec and replaced all the suspension bushing.
I have to be honest in terms of ride quality I didn�t notice a big difference, it isn�t worse due to being lower but it doesn�t ride any better. The roads here in MN are really bad, I think any setup would struggle.
The only caveat is that my car had 44k on and I think in reality the suspension was fine, maybe if yours has more miles/wear you would notice more of a difference.
Where I live the roads are absolutely atrocious and the M030 in my opinion was just too much to handle. I couldn't wait to get rid of it. I decided to go with H&R Street Coilovers and couldn't be happier. I found a used set on E-bay for $1100 shipped. I know another 993 owner who did the same thing and is very happy he did the swap to H&R Street Coilovers. At the end, the geometry on these cars will never make them ride like cadillacs and anything you put in will be on the stiffer side, the Streets took that harsh edge off of the feeling i head riding on M030 suspension. The benefit of course is also capability of height adjustment. (No dampening settings on Streets, that's fixed)
Thanks. I'll look into those as well. Right now I'm leaning toward Koni Yellow Sport or Koni FSD -- depending on install prices. TireRack and others have pretty good pricing and it looks like other 40 AE owners here on Rennlist have installed.
My one concern was the comment that our rear springs are slightly longer than stock to take into account he X51 package - so wasn't sure if the aftermarket options would work with the X51 package.
Koni Sport Dampers and H&R Springs for about $1150.
http://www.tirerack.com/suspension/s...oModClar=Coupe
Install prices should be exactly the same between the two. If you are going to track it, even few times a year, I would recommend the Koni Yellows. The Yellows paired with OEM springs were actually softer than stock when set at full soft. Yet felt like a totally different suspension when turned to full stiff at the tracks. However if you're mainly into comfort street cruising as your priority, I still maintain FSD's are your best option.
Thanks. I think I'm going to go with the Yellow Sport set up when the funds are available. I like the FSD technology, but would like to keep the options open.
I installed Koni Yellow with the H&R springs from Tire Rack. They are awesome, mine are set to medium and my chassis has come alive. I went to the track this last weekend and really enjoyed the feel. Next time I will adjust them to 3/4 firm for the track. Now that the track weekend is over I will adjust them to almost full soft.
On all four, you adjust the konis on the top. This top adjustable piece is accessible fairly easy for both the front and the back. There is an adjustment part that will stick out through the hole in the shock mount and the chassis. On the front, you have to remove the two plastic covers (on the left and right hand side of the battery cover), which is easily removed with one screw each side.
On the back, the mechanic showed me how easy it is to remove the carpet and adjust them. There is a small rectangle "shelf" that is behind the rear seats, you just grab the carpet in the middle and pull up, and then grab the ends and the carpet comes out very easily (you are not breaking any kind of glue or seal, so don't worry). Once the carpet is out, then you have access to the adjustment part for the rear dampers. The set comes with 4 white adjustment handles, and you just turn left or right depending on which adjustment you want to make. It probably takes under 5 min to get access to all 4 and start making your adjustments. Very pleased with how Porsche obviously thought about giving owners access to the shock mounts from the top, and then Koni designed a system to take advantage of that design. Fairly good process for a car that was built in 1999. Now days you just push a button, but for those who don't have a 991 this is a great approach, and also gives you more flexibility on the exact setting you want to select (which may be a good thing or bad thing depending on who is making the adjustment).
If you have a Bose sub, you have to remove the bose faceplates (they pop off) and then unthread this painfully long torx (t27 I think?) bolt, slide the sub forward a bit, unplug it electrically, then slide it the rest of the way out.
This got to be such a pain that I now just leave the faceplates, bolts, and carpet squares all uninstalled. The sub won't go anywhere so long as the rear seats are up; the brackets hold it down and the seats keep it from sliding forward.
