Tuscany964

Can anybody tell me all the parts the M030 option for the 964 included?

I suppose it's all of the RSA's standard equipment but what was it exactly and are the parts still available (excluding weight saving differences).

Suspension-wise was it the same as the 965? Any idea how it compares to something like Bilstein HD's/Koni Sports/H&R's/Eibachs?

It seems to me there is more difference between front & rear spring rates with the M030 than with H&R's (for example H&R's have stiffer front springs but almost the same as M030 rates at the rear). Does this cause M030 equipped cars to understeer less and track better at the front on less than perfect roads?

Thanks

Geoffrey

I have the M030 option on my car and it contains stiffer springs and dampers. They are not as stiff as the H&R Red with Bilstein HDs. In fact, when I switched to the H&R Red, I kept the M030 shocks and they were Ok, but the Bilstein HDs are much better matched. The front sway bar is 22mm with M030 and 20mm standard. I cannot remember what the rear bar differences are since they changed depending on year and options.

cobalt

I believe the M030 only upgraded the front bar and rear bar was standard to the C2 for the year beginning as an option in 1991 so 20mm rear. I don't believe the M030 was offered on the C4.

Bill Verburg

front sways
C2/4 base 20mm
C2/4 M030 22mm also RSA
964t & t/l 21mm
RS 24mm

rear sways
>'90C4 18mm
'91> C2/4 20mm
'90manual 21mm
'90tip 19mm
964t & t/l 22mm
964t/l tip 21mm
RS 18mm

cobalt

The info I have says the T/L tip used a 21mm rear. Which is correct?

Also I was wrong the did offer M030 for the C4 although it used different front strut for extra weight. rear sways stayed the same on all models.

Bill Verburg

21

MisterRisky

I'm glad you guys got into this. I'm getting new bushings and wanted to make sure I order correctly. If I read Bill's chart right, my 1991 C2 non-M030 with manual trans has 20mm front and rear? Just making sure I read all that right. Thanks for posting the values.

Tuscany964

Very helpful, many thanks to you all

Bill Verburg

correct US '91 C2 manual is 20/20

MisterRisky

Thanks Bill. I appreciate your expertise!

TR6

What size are the rear sways for M030 & RSA? Maybe I missed it in the list above.

cobalt

Only front bar sizes changed for M030 cars rears remained the same.