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YOUR RESEARCHBump stops
Leading reported evidence
Install lowering springs they were slightly squashed
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Performed · outcome unconfirmed
On the VW's I've had in the past they had almost identical bumpstops and when I fitted lowering springs they were slightly squashed with the car just sat there, and they were soon destroyed by driving.
Leading evidence: 'Install lowering springs they were slightly squashed' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install lowering springs they were slightly squashed' (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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Performed · outcome unconfirmed
I'm running quite aggressive negative camber at the rear with quite excessive toe in.
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Performed · outcome unconfirmed
However, at the front I am running virtually no camber at all, and no toe in. This has worked really well, with the Konis and H&R, far less fidgety at the front, feels very planted, nice steering feel, and the back is super grippy.
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Use standard bump stops and top mounts
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Suggestion
by William Francis, definately not ideal with Koni Special actives but very good and CG recommended the fitment.
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Install lowering springs they were slightly squashed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
On the VW's I've had in the past they had almost identical bumpstops and when I fitted lowering springs they were slightly squashed with the car just sat there, and they were soon destroyed by driving.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
However, at the front I am running virtually no camber at all, and no toe in. This has worked really well, with the Konis and H&R, far less fidgety at the front, feels very planted, nice steering feel, and the back is super grippy.
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm fitting koni active dampers and eibach springs -30mm.
Question is do i need to cut my new bumpstops down or leave them.
There is about 3" between bottom of bumpstop and damper.
Cheers
Carl
I fitted the same Konis recently with standard springs and didn't have to alter the bump stops in any way, sorry i don't know if lower springs would be different.
There's some photos on my instagram page db996gb if fancy a look.
On the VW's I've had in the past they had almost identical bumpstops and when I fitted lowering springs they were slightly squashed with the car just sat there, and they were soon destroyed by driving. I used to cut one of the sections off.
Don't know if the same applies to the 996 but I'm sure there will be someone on here who can tell you,after all I'm sure you're not the first person ever to fit some lowering springs to a 996!
I wonder if Center Gravity would tell you?
Mac
At -30 you'll be riding on the bumpstops pretty much all the time. You'll have to trim them a bit and see how you get on.
Trimming bump stops makes them firmer as springs. Porsche, in fact, call them additional springs. This in itself will have an effect.
I posted this in the other thread about Koni and H&R the other day.
Well worth reading that thread for more tips if going with Konis and shorter springs.
I just did my front bump stops last fall as the old ones were totally shot. I have M030 suspension, so I opted for the shorter bump stops Porsche offers. I ended up with going with aftermarket ones, I think from Schaffler and they have been flawless so far.
I did my front bump stops and top mounts last week! It's a C4S.
I used the standard bump stops and top mounts. These are listed for the C4S despite having the factory lowered suspension.
The shorter ones are for the IX74 option.
Yeah, shorter ones are more for IX74 and for those using H&R or Eibach etc.
Can't see there being an issue using them with M030 though, if the dampers are good you shouldn't hit them anyway, and if you do your dampers are already gone I would guess?
Mine is X74 with H&R lowering springs and Koni special actives, I also drive on horrifically bumpy B roads in Suffolk. I have the standard length bump stops and don't feel amy restrictions unless doing stupid speed over said bumps, I'm not sure if reducing the size of the bump stops would not simply reduce the efficiency of what they are there for.
There is no doubt that a properly set up set of decent coilovers would be far better and a set of Bilstein B8s would be more in tune with the reduced height but good coilovers are much more expensive and every report I have seen has stated the B8s as being way too harsh for British B roads.
I'm the same as you, Konis and H&R, I have been in loads of different set ups on these and for me, this just works so well as a road car.
Not sure the coil overs are better, everytime I get in a car with Ohlins, KW or Bilstein it feels far too firm, a bit fidgety at the back as soon as the road is not super smooth, which, being in Norfolk is 90% of the time.
Hold on....
Not sure what you mean yours is X74? Surely the X74 is the X74 dampers, Springs and bump stops, which you have now swapped? Or do you mean you have the standard X74 bump stops.
Got ya.
I'm running quite aggressive negative camber at the rear with quite excessive toe in.
However, at the front I am running virtually no camber at all, and no toe in.
This has worked really well, with the Konis and H&R, far less fidgety at the front, feels very planted, nice steering feel, and the back is super grippy.
You could mark all three top mount bolts, slide the dampers as far out as they go and then see what you think. You can go back if you don't like it if all are marked.
I had standard bump stops fitted when I had the Koni SA and H&R springs out on. It was nearly 5 years ago, I would think the advice now is to go with the M030 bump stops if you’re fitting lowering springs whatever dampers you’re using.
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