GT4 ORIGINAL REAR KONI PART NUMBER

I know original rears are NLA, but what is the original Koni number?

 

I also read through search that the rear was longer than a GTB shock?

 

82-1831 That should be the Koni number for 104441.

 

thx brian , that's the koni number for rear 75 308GT4?

 

Its the only one I see for any GT4.

 

okee doke. ill look into it. doesn't seem like the typical koni number, odd

 

Looks like most of the others in my cross reference book. Pretty much all of them up through TR /328 are 82- something.

 

yes I agree on the 82- but usually there is some SP number involved. But I started this thread after speaking with True Choice today and I told him the numbers on my rears and he said that the Original Ferrari or specific Mfg numbers usually have a letter after the number. Interesting

 

Would the number be stamped on the shock shoewhere? I can look at mine, if it's visible.

 

yup lower part of shock. do you think yours are original dave?

 

pretty much in line with the brake rotor

 

Yes, I believe so. I'll take a look and get back (here) in a bit.

 

great thx

 

It's a good thing the engine is out. Otherwise, I'd have never been able to take these:

Looks like:

82-1831 SP1 104441

to me.

Adjustable! Hmm...., I didn't know that.

So now you have it from, Rifledriver & DavidDriver.... ...adjustable. hm.....


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Cool looks like that’s it. Like I said I wanted to know the SP number. But also curious about a 82p number I was told about by Truechoice. And yes they are adjustable but the shock and spring need to be removed from the car. Yay

 

Also I wonder if the length is longer than a 308 shock? And what is sp1 or sp6??

 

Guys thanks for all the info now my next question.

What are Koni Special D shocks? I read on a few sites such as JEGS SUMMIT etc that they are high pressure gas. Koni website mentions nothing about gas pressurization

 

special D koni arent gas dampers. at least the ones from the 70s-80's werent. it just has stiff valving for a more sporting set up. im not sure if the rod is beefer as well? interestingly enough my old set were made in France instead of Holland

 

80-82 series twin tube hydraulic....
https://www.yumpu.com/en/document/read/27639516/index

 

yes thx I spoke with Koni, I didn't think they were gas but some sites were claiming they were

 

I took my GT4's original shocks apart about 15 years ago, it was pretty easy to do. These "old" Konis are not anything like a modern shock, their "adjustablity" is actually a "wear compensator". I had pretty much the same shock on my 1966 Alfa Duetto back in the early 1970's. When I took them apart I found that the top seal rubber had started to turn into crumbs that clogged most of the small passageways in the damper system. Surprisingly the components of the "seal" looked familiar as they were just rubber disks identical to those used in old toilets and other plumbing devices. Later versions of the same shock used a normal oil seal instead of compressing a stack of rubber disks. For those familiar with boats the old seal is similar to the packing disks used on inboard engine prop shafts. I modified my top seal holders to use a normal oil seal and refilled my shocks with motorcycle fork oil. I don't recall the weight that I used, fork oil is available in a gazillion different weights.

Most if not all of the internal parts were of Imperial dimensions which caused me to do some research into Koni. What I found on the net was that Koni hired a US engineering company to do the original design (1950-60's?) which would explain the Imperial dimensions.

As a bit of a side story, in the mid 1990's I worked with a guy that left our company for an engineering job at Koni USA. The Hebron KY location is local, just across the Ohio River from Cincinnati. He gave me a tour of the place and watched the techs rebuilding customer shocks. They just chucked them in a lathe, cut the shock body at the weld, cleaned/replaced the internals and then welded the body back together.

 

thanks mike , cool story, IIrc you had a thread on your rebuild?

 

You are correct. I just looked it up and all the photos were lost in one of the site crashes back in the day.
https://www.ferrarichat.com/forum/threads/inside-of-a-308-koni.19907/#post-67308840