The Porsche 924 Owners Club

Dedicated to the Porsche 924
Forty Years of the Porsche 924 Turbo
It is currently Thu Jun 27, 2019 11:15 am

All times are UTC [ DST ]




Post new topic Reply to topic  [ 17 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Fri May 10, 2019 5:17 pm 
Offline

Joined: Sun Jul 22, 2018 12:45 pm
Posts: 38
Model: 924s
Just found this! 1987 published options for 1988 model year 924S. Clearly gives the two 'Sports' options as M030 which is described as 'sports chassis' and has stabiliser bars and sports shocks and M474 which is sport shocks!

Note there is no mention of 'adjustable' shocks. This suggests M030 for a 924S in 1988 was larger bars and harder shocks, certain springs, lowered and was not adjustable.

Also attached is the relevant page of the 924S PET by Porsche showing the two shock towers listed as M474 and M030 - clearly not the adjustable shocks I showed in there very fist picture!


Attachments:
7de24594e4d2218d230fa690f40c05a4.jpg
7de24594e4d2218d230fa690f40c05a4.jpg [ 57.41 KiB | Viewed 519 times ]
Pet.PNG
Pet.PNG [ 121.25 KiB | Viewed 516 times ]

_________________
1988 924S
1968 912
Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Fri May 10, 2019 5:21 pm 
Offline
Club Member
User avatar

Joined: Mon May 18, 2015 7:53 pm
Posts: 1371
Location: Bournville - Land of Chocolate
Model: 924S
Interesting thread

I suspect that 'Lowered/Adjustable Suspension' is a general term for either 'lowered' or 'Adjustable' options

The 924S had standard front ARB of 20mm, with 21.5mm solid and 23.5mm tubular being options.
The standard 924S rear had no ARB but 14mm was an option (it pairs well with the two front options)

I have a five-way adjustable 19mm rear (on its stiffest setting) paired with a 25.5mm tubular front. It's deliberately set up that way by me to be easy to provoke oversteer; but no manufacturer would put a road going car out to the public like that

MO30/M637 option included height adjustable struts on the 944. As far as know the only 924S that came with height adjustable struts was the CS model in the US (intended for Autocross) - those struts are very hard to find

_________________
Nige
1985 924S Historic Road Rally / Targa Rally Car


Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Fri May 10, 2019 6:36 pm 
Offline
Club Member
User avatar

Joined: Sat Jan 30, 2010 11:13 pm
Posts: 14956
Location: Somerset
Model: TheOnly Way Is Turbo
Nige wrote:
I have a five-way adjustable 19mm rear (on its stiffest setting) paired with a 25.5mm tubular front. It's deliberately set up that way by me to be easy to provoke oversteer; but no manufacturer would put a road going car out to the public like that


Note Porsche did briefly up the rear anti roll bar sizes and then dropped them back down. Like you Nige, I increased the rear bar size from 14mm to 18mm.

_________________
Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it


Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Fri May 10, 2019 8:44 pm 
Offline

Joined: Sun Jul 22, 2018 12:45 pm
Posts: 38
Model: 924s
Just realised looking at the PET diagram for 1986 to 1988 924S, you can clearly see that the M030 strut is shorter than the other one. The distance from the bottom of the strut to the spring base is different. What I think is amazing is that this is clearly not the later threaded cylinder with the ally spring perches version of M030, as both the M030 and the M474 on this diagram have fixed spring perches.

More research last night and this is what I found. It looks like that for a 1988 model year 924S the M474 was the first option of the sports suspension, it had a sports shock by Koni which actually was adjustable but only off the car on initial set up (rebound adjustable) and could be set to slightly different settings this was a stiffer setting, and had a slightly shorter and stiffer front spring and was effectively halfway between standard shocks and the M030 option.

M030 had the sports shock which were rebound and height adjustable (at the top), rear shocks that were rebound adjustable - these were valved differently and stiffer, they had a red marked spring on the front rather than a blue one, the thicker roll bars front and back and it looks like also stiffer bushes.

Happy to be corrected but from everything I have read this looks like what was in each option.

_________________
1988 924S
1968 912


Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Sat May 11, 2019 4:35 pm 
Offline
Club Member
User avatar

Joined: Thu Dec 13, 2012 1:29 pm
Posts: 6053
Location: Athens , Greece
Model: 1988 924S
When I am back home next week i will post a pic of the M030 option for the 88 924S from tge Porsche 1988 accessoeies brochure :beer:


Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Sat May 11, 2019 5:47 pm 
Offline

Joined: Sun Jul 22, 2018 12:45 pm
Posts: 38
Model: 924s
That would be just great - I bet it's exactly the opposite of what I just described!

_________________
1988 924S
1968 912


Top
 Profile  
Reply with quote  
 Post subject: Re: Porsche 924S sports suspension? Re-post
PostPosted: Sat May 11, 2019 7:50 pm 
Offline
Club Member
User avatar

Joined: Mon May 18, 2015 7:53 pm
Posts: 1371
Location: Bournville - Land of Chocolate
Model: 924S
Martin skeet wrote:
Just realised looking at the PET diagram for 1986 to 1988 924S, you can clearly see that the M030 strut is shorter than the other one. The distance from the bottom of the strut to the spring base is different. What I think is amazing is that this is clearly not the later threaded cylinder with the ally spring perches version of M030, as both the M030 and the M474 on this diagram have fixed spring perches.

More research last night and this is what I found. It looks like that for a 1988 model year 924S the M474 was the first option of the sports suspension, it had a sports shock by Koni which actually was adjustable but only off the car on initial set up (rebound adjustable) and could be set to slightly different settings this was a stiffer setting, and had a slightly shorter and stiffer front spring and was effectively halfway between standard shocks and the M030 option.

M030 had the sports shock which were rebound and height adjustable (at the top), rear shocks that were rebound adjustable - these were valved differently and stiffer, they had a red marked spring on the front rather than a blue one, the thicker roll bars front and back and it looks like also stiffer bushes.

Happy to be corrected but from everything I have read this looks like what was in each option.

That fits to a degree with my 'Porsche 924S 944 Models Dimensions Tolerances' book

924S MO30 option up until end of 86 had red dot springs of free length 359mm and rate 24.1 N/mm giving a lower ride height (as opposed to the standard chassis blue dot springs of 381mm free length and rate 21.8 N/mm)

_________________
Nige
1985 924S Historic Road Rally / Targa Rally Car


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page Previous  1, 2

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 12 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
© 2009-2014 The Porsche 924 Owners Club - Powered by phpBB