davyboy

Hi,

What are the differences in the Koni M030 front struts for the 968 and 951.

I am getting hold of some 951 M030 front struts, and want to get them rebuilt by my local Koni specialist to 968 CS spec. I already have the 968 rear coilovers.

Are they valved differently, or is just a different weight spring?

Dave

Damian in NJ

CS didn't come with mo30, it was a separate option-the only difference between CS and Row 968 front suspension was the shorter springs.

davyboy

I know it was an option.

Just trying to undersdtand the differences between the 951 and 968 M030 front struts and springs.

Dave

thingo

I have been wondering about this too.
Looking in the pet the 968 has different springs and the damper part number is different, I have been told it is the 'same' koni, with changed valving, but if you find out the valving I would like to know.
I am considering (if possible) changing the valving when I get the second adjustment upgrade.

Skip

They are valved differently, but only to account for the 968 added weight. Have your Koni rebuilder contact Gordon at Koni-NA (gordon@koni-na.com) for more details on that and how to convert them to Double-Adjustable 8741-1172S (this is a good conversion for the units you have, but may be overkill unless you plan on running 300+ spring rates).

Good Luck!

Scott M.

Skip;

Speaking of contacting Koni...

Is there a secret to reaching these turds?? I've used the ph# you gave me, left three voice mails with Tech, called at least 5 times but never got a live person.

Any tips??

Scott

Skip

Scott, sorry to hear you are having trouble raising them - I just emailed you.

davyboy

Anyone know the different spring rates?

Thanks - Dave

Thom

M030 OEM spring rates are the same throughout the 944/968 range : 28 N/mm progressive rate.
That's the same rate as non-M030 968 Lux/CS suspension and non-M030 951 MY90/91 suspension.

davyboy

Cool - so I just need to get them revalved a bit stiffer.

Skip

Thom's right - also, the difference was in free height to account for the added weight in the 968

thingo

So when porsche added the coilover to the torsion bar at the rear for the 968,they didn't stiffen the front to even up the front/rear balance?

davyboy

I find it interesting Porsche made the 968 M030 firmer than the 944 M030 with stiffer valveing at the front, and with a spring at the rear...?

Strange. But it clearly worked.

Thom

No, they didn't.
I would guess they found that a stiffer valving at the front proved enough to match the set up with rear coil over springs.
Switching from 26.8 mm to 30 mm for the front sway bar certainly has something to do with it - a sway bar somehow acts as a torsion bar, too.