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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHM030 Suspension Upgrade on a 1999 C2 Cab?
Leading reported evidence
Install mo30 kit
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Read evidence and context
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Performed · outcome unconfirmed
I've got the factory fitted MO30 kit on my 99 C2 cab weekend wonder.
Leading evidence: 'Install mo30 kit' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'good idea not' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Fill arches nicely' (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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Suspected cause · Original poster
Never mind new springs and new shocks was probably a good idea not to mention the M030 antiroll bars which definitely weren't on there previously!
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Suggestion
Lowers the body by 30mm and gives it a really purposeful stance and the wheels fill the arches nicely.
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9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I've read enough to believe that pre-2002 Cabs should NOT be fitted with PSS-9s or X74 suspension due to body flex issues.
That leaves me asking if the M030 kit is a worthwhile upgrade? Has anyone had this upgrade done on a similar car?
Would be grateful for any wisdom you can hand down on this!
I've got the factory fitted MO30 kit on my 99 C2 cab weekend wonder. Lowers the body by 30mm and gives it a really purposeful stance and the wheels fill the arches nicely.
Can't comment on the flex though, surely all cabs would suffer from flex anyhow (70% less rigid than the coupé is the figure i've heard) so the various suspension upgrades would have a similar effect?
Hi Tim. My understanding is that with a firmer setup, there is more grip hence higher forces acting on the chasis. M030 is less punishing than X74.
Do you feel the M030 difference mainly on the track or is there some benefit on the road too?
It's about 700 +VAT for parts and same again for labour (inc. geometry.) Sounds like a good improvement for the cost...
70% :shock: Maybe I should sell up and get a coup :lol:
can't say i've been on track...
it is a firm ride but no more than i'd expect from a sports car, i have no real comparitor since this is my first 911 though...
M030 and a measuring tape?
Before the car went to JZM I measured the distance from the bottom of the GT3 kit side skirts to the ground = 13cm. Also the shortest distance (vertical line) from the bottom of the wing arch to the alloy rim = 9cm front and back.
I suspect this was pretty low to start with?
The car came back with the new set up looking the same except at the back wheels arch was around 1 cm FURTHER from the rim = 10cm.
I had gone with the M030 upgrade and the H+R lowering springs (hence have spare springs if anyone is interested).
I know it's a Sunday and all but if anyone can be ar$ed mking those measurements on their car I'd be very interested and grateful
Thanks dervish. Doh - I think I already had lowering springs on there...probably with the original dampers which could be why the ride was so harsh.
Never mind new springs and new shocks was probably a good idea not to mention the M030 antiroll bars which definitely weren't on there previously!
Has anyone managed lower than this?
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