964 to 993 suspension conversion question

[indra gunawan]

I am doing installation of Koni shocks from P964, which is 15 mm longer shaft than the P993 Row Boge shocks.

And the new P964 Eibach springs are also taller than the P993 Row springs.

Can i just cut the new Eibach springs to make it shorter to fit the Koni shocks that also have 15mm longer shaft. (i won't do anything about the shocks) to install to my P993 Carrera.

I just want the Row height for my P993.

Is this the correct actiont to take (cut the springs) ?

Thank you

[Don Plumley]

Cutting springs changes their characteristics. While some do it, I would not.

[indra gunawan]

i definitely agree with what you said, but i don't have another option beside install this Koni & Eibach.

Or perhaps will be better Koni with Row ?

How about the taller Koni shaft, it shouldn't be any problem ? (i think there shouldn;t be any problem, because the shaft can travel to the lowest limit).

PS : The Row springs is stiffer than the Eibach when i pushed by hand.

[roadsleeper]

Looks like you got used Konis off of a 964, why not just flog them off and buy a new set of 993 specific shocks? Or even better yet, a matched set of shocks and springs.

I agree with Don Plumley, I'm against cutting springs as this will alter their compression and rebound characteristics. More importantly the springs' abilities to handle compression and rebound.

Also, those who know better please correct me on this if I'm wrong, I don't think pushing the springs by hand will give you a good indication of their actual rigidity. As I understand it, a spring will only show how rigid it is under a minimal amount of load (i.e., when it's installed in the car).

[indra gunawan]

Originally Posted by roadsleeper

Looks like you got used Konis off of a 964, why not just flog them off and buy a new set of 993 specific shocks? Or even better yet, a matched set of shocks and springs.

I agree with Don Plumley, I'm against cutting springs as this will alter their compression and rebound characteristics. More importantly the springs' abilities to handle compression and rebound.

Also, those who know better please correct me on this if I'm wrong, I don't think pushing the springs by hand will give you a good indication of their actual rigidity. As I understand it, a spring will only show how rigid it is under a minimal amount of load (i.e., when it's installed in the car).

You were right, i have to think it over of buying a new specific suspension.

About the springs rigidity that only show rigidity under a minimal amount of load , you were absolutely correct (in my opinion).

[Don Plumley]

I seem to remember that some have put the Koni insert into the 993 strut tube by cutting down the strut tube. I don't think the struts themselves are interchangeable.

The issue of pressing the spring to test force is progressive vs linear. The koni looks to be a progressive spring, meaning the initial compression is easy and then builds.

[roadsleeper]

Indra Gunawan - If I might ask, did you get the suspension off of another Porsche in Indonesia?

Don Plumley - I was trying to remember those terms!

[indra gunawan]

Yes, i got from someone here. Why ?

I think i just plan to buy a new specific set for the whole car later and use that strut for a while (the strut went already to machine shop to make it shaft shortened).

[roadsleeper]

Just wondering. It wouldn't happen to be off of a Turbo would it?

I'm in the process of searching for new suspension for my 964 as well (you can run a search on my username and you'll find it). I think most of the information would be relevant, certainly for the front if not partially for the rear.

I currently run a RUF/Bilstein set up which I think should be similar in feel to a Bilstein HD shock and H&R Sport or Race spring combo, shouldn't cost you more than US$1,000... I'm going for a higher level of adjustability (coilovers), so hence the search.

[indra gunawan]

Originally Posted by roadsleeper

Just wondering. It wouldn't happen to be off of a Turbo would it?

I'm in the process of searching for new suspension for my 964 as well (you can run a search on my username and you'll find it). I think most of the information would be relevant, certainly for the front if not partially for the rear.

I currently run a RUF/Bilstein set up which I think should be similar in feel to a Bilstein HD shock and H&R Sport or Race spring combo, shouldn't cost you more than US$1,000... I'm going for a higher level of adjustability (coilovers), so hence the search.

As long as i know the Koni's are not from a Turbo.

For the time being, i am going to use that koni for a while.
And for the future, i still have to make up my mind to choose which and what kind of suspension kit i want.

[roadsleeper]

RUF punya ada di halaman ke-4:

http://www.rufautocentre.com/parts/pdf/993.pdf

Bedanya set mereka untuk 993 memang komplet, jadi sudah termasuk sway bar dan semi-adjustable shoknya (= mahal). Kalau nggak salah, Koni juga semi-adjustable, jadi kalau bisa di modify supaya muat, mustinya lebih enak daripada stock suspensionnya.

Boleh tanya pakai workshop yang mana?

[indra gunawan]

Sorry for my bad English that make roadsleeper wrote my with my languange here.
Roadsleeper - i sent you pm.