Jim C

Why did Porsche not offer the larger M030 sway bars on the 968 Cabs? Was it because of torsional rigidity issues and/or something else? I know putting the larger M030 sways on regular coupes is generally OK, but why not cabs?

Yogii

M030 was more than just thicker sway bars. Bigger brakes, wheels, Koni dampers.
If you go racing in a convertible you need a roll cage. If you do track days in a coupe you do not.
Why do you think most P-Car coupes retain their value better that cabs do?

-Yogii
AKA 968 Novice

Jay Wellwood

While not for sale to the public, Porsche did create one M030 Cab IIRC.

Yogii

Jay,

I did not even know that the M030 was mainly a coupe only option, I'm a novice after all. I just wanted to point out that the M030 option really appeals to the racer guys and gays.
Everything that I have heard or read about it said that is was to uncomfortable for a normal street car.

-Yogii

Isaacsracing

Not a good typo. I hope you meant gals.

Yogii

OOPS

spark1

Don't forget front spindles and hubs!

While most "race" events require roll bars in cabs, they also require role bars in coupes. De events are different.

I have a cab that has Koni adjustable shocks and M030 sway bars front and rear thanks to a PO. Its handling is very similar to M030 cars.

If you were around in the late 70's or 80's you will remember that most production cabs disappeared due to DOT requirements for rollover protection. This protection came in the form of reinforced windshield frames. Our 968 cabs passed the tests with strengthened windshield frames.

Yogii

Thanks for the lesson. My car has m030 sway bars, is lowered 2 inches, has non-m030 springs and shocks. I can not image anything rougher for the street. It is just at that limit...
17 inch wheels.
Perfect for the street, no rougher please.
Yes talking about DE days. No desire to super or turbo charge, hence make into a race car.
Canyon carver, high speed tourer is what I want.

more later.

-Yogii

spark1

I forgot to mention that besides roll bars for cabs, "race" cars are required to have a hard top.

How is your car lowered? Usually achieved with readily available and adjustable konis .

Yogii

Good question! I don't know. The 2 indy shops I have taken it to say standard springs, standard front struts, standard rear shocks, then they mumble something about the asymmetric washers in the rear....
Top of the hood measures 48 inches though. I'M confused.

-Yogii

thomasmryan

the work shop manual gives the height measurements for the various iterations. ride height is measured from the hood/bonnet to bumper seam and the tag light area in the rear.


cab springs are longer for the added weight of the chassis. the springs have paint markings for their classification group and deviation.


making the car sit level is a great starting point. for North American cars, taking 20mm off the rear will get RoW numbers per the spec book. (do adjust the headlights afterwards)

the suspension on cabs can be tweaked not to push within the variance of the alignment specs.

RajDatta

Coupes being worth more than cabs is a very recent phenomenon. For the longest time, cabs commanded a premium over coupes. So all the newbies that are offering advice, this is a very recent thing.
As far as the topic of swaybars, coupes and cabs are very different. Cabs cannot be setup too stiff and need a certain amount of give or the ride quality really suffers. I would never go m030 suspension on a cab. I run m030 swaybars on mine with 18inch wheels and still find the ride to be compliant. If I were to switch to a stiffer/m030 suspension, all of a sudden the car will become unbearable to me.

Jim C

Thanks for the responses folks... Well aware of the M030 package on coupes - have one such coupe in my garage, and had an M030 coupe prior to that. Also no intentions of ever racing or putting any 968 on a track. Not my gig.

Just really wanted to know if anyone has done M030 sways on their cab and/or why would one not want to do that.

Raj - did you ever have M030 sways and 17's on your cab? If so, did you notice a marked difference in ride moving from the 17 to 18 inch wheels? I have a set of 18's that I was planning to put on my cab, but I think I may go to 17's and look into getting the M030 sways. Really don't want to deal with a harsher ride and potential damage to a set of 3-piece 18 inch wheels around the pothole-laden PA road system!!!!

RajDatta

Hi, I live in NJ, have similar roads and have had no issues running 18's. I find the ride quality to be livable (subjective)

Jim C

Thanks for the feedback Raj.