What price for my 3.0 P&C's ?

cstreit · cstreit's Garage

Gang,

I'm going to sell my '82 SC pistons, cylinders, wrist pins, clips, etc.. and would like to know what a fair price for these is...

The rings have 2000 miles on them, the cylinders still show their honing very clear and are not worn.

Any idea on what I should ask for?

Superman · 11-15-2002, 03:04 PM

Doug Zielke has his for sale on the classifieds page here. I'd guess they may move slow, but they do have value so someone should want them. Every time someone fixes head studs on an early SC, the 8.6:1 pistons should stay on the bench, and yours should be installed.

Wayne 962 · Wayne 962's Garage

NIkasil ($500-$600) or Alusil? ($10).

-Wayne

Bill Verburg · Bill Verburg's Garage

Quote:

NIkasil ($500-$600) or Alusil? ($10).

That's the price I've seen.

cstreit · cstreit's Garage

Seriously? C'mon?

For that price they'd be worth more as the pile of race car takeoffs I'm saving for big piece of lawn art..

So far we have

1) Lots of brake disc's
2) Some Fuchs wheels
3) a hand full of bent valves
4) Toasted master cyl.
5) Old head studs, rod bolts, and bearings
6) One slighty used set of KS p&c's?

Doug Zielke · 11-17-2002, 06:17 AM

The $10 comment is rubbish.
I've had a few offers around $300, which is more like reality considering the minimal wear of my set. As I say in my FS ad, they would make an excellent choice for a "budget rebuild". Not everybody has the jack to slap in a brand new set of P & C's just for the hell of it. For those people, a slightly used KS set makes sense.

Superman · 11-18-2002, 12:53 PM

Yeah, Wayne.

I put the Alusils back into my car because in nearly 200K miles, the greatest wear on any and all cylinders was .0015". That's straighter than many NEW engine cylinders. I know that forged pistons cannot be used with Alusil cylinders, but I sure expect to get my ten dollars' worth!

ChrisBennet · ChrisBennet's Garage

Quote:

Originally posted by Superman
Yeah, Wayne. I put the Alusils back into my car because in nearly 200K miles, the greatest wear on any and all cylinders was .0015". That's straighter than many NEW engine cylinders. I know that forged pistons cannot be used with Alusil cylinders, but I sure expect to get my ten dollars' worth!

Superman,
What was the wear like on the pistons?
I measured some SC cylinders and they were worn slightly oval but the diameter was greater across instead of up and down. Very weird. Do you remember which direction your's were worn?
thanks,
Chris

Superman · 11-18-2002, 02:14 PM

I was only commenting on the cylinders themselves. I did not get very persnickity about the pistons, just the cylinders. The greatest wear (again, folks ONE AND ONE HALF THOUSANTHS total wear) was at the lower end of the piston travel (of course) and was in the direction that the connecting rod throws the piston skirt (of course). As far as I know, this is how all cylinders wear. Less at the top, more at the bottom. Always perpendicular to the crankshaft, as opposed to wear that would be parallel to the crank.

I was amazed. Most of my friends said they would have no qualms about reusing cylinders with 10 thousanths of wear. Even 20 (but that's a stretch). They characterized my findings as "entirely insignificant wear."

Like I say I was not as interested in piston wear. I was interested in the ring lands, which were as tight as a....well, you get the picture. I put brand new Goetze rings in it, and they seated just fine.

island911 · 11-18-2002, 02:23 PM

Check out

these guys . ..I guess nobody told them these are only worth $10.

Bobboloo · Bobboloo's Garage

Another thing to remember is that even a worn Alusils can be bored out to 98mm and Nikasil plated for a nice 3.2L setup.

I picked up a used set of 90mm Alusil CIS P+C's for $80 that had no significant wear (in spec) but I'm boring them out to 92mm and plating in Nikasil for a 2.8L motor. I'm putting in JE 92mm MFI pistons.

Bobby

Superman · 11-18-2002, 02:29 PM

Like I said before, these units would be great for someone looking to upgrade a non-late-SC engine. For example, an early SC, the ones with the fatter intake ports and intake runners and other fuel parts like the different fuel distributor, would be a GREAT place for this set of P&Cs. I dare say a car like that might be able to keep up with mine.

So, for anyone fixing broken studs on an early SC, and wanting to bump performance up a bit at little or no cost.....Doug's P&Cs would be just the ticket.

No, they're not extremely valuable P&Cs (For all we tease Wayne, his points are well taken at least by me), but someone else might think them to be a terrific bargain at just a few hundred dollars for an excellent condition set.

ChrisBennet · ChrisBennet's Garage

Quote:

Originally posted by Bobboloo
Another thing to remember is that even a worn Alusils can be bored out to 98mm and Nikasil plated for a nice 3.2L setup.

I picked up a used set of 90mm Alusil CIS P+C's for $80 that had no significant wear (in spec) but I'm boring them out to 92mm and plating in Nikasil for a 2.8L motor. I'm putting in JE 92mm MFI pistons.

Bobby

There was some discussion about doing just this. The SC's cylinders seal groove makes boring them out impractical.
-Chris

Wayne 962 · Wayne 962's Garage

Okay, let's clean this thread of some mis-information. The source of my information comes from respected rebuilders - not heresay on the BBS.

Alusil cylinders are one-time use. They cannot be re-ringed, as there are no replacement rings for them. You can use the Nikasil rings in the Alusil cylinders, but they will wear out the cylinder a lot faster. Alusil was a cheaper alternative to Nikasil, and the process involves coating both the piston and the cylinder. Unless you pull them off of your engine with the rings/pistons/cylinders intact, then you cannot reliably reuse them. In addition, there are several measurements on the cylinders (not just what this fellow listed in his auction), such as ovality. These are very important as well.

Before you start to disagree with me, please just read the engine rebuild book - it's all in there, along with all the specs that you need your cylinders to meet...

-Wayne

island911 · 11-18-2002, 03:44 PM

Quote:

Originally posted by Wayne at Pelican Parts
. . .
Before you start to disagree with me, please just read the engine rebuild book - it's all in there, along with all the specs that you need your cylinders to meet...

-Wayne

LOL; great circular. To paraphrase "before you disagree with me, get a second opinion from this book I wrote"

heh heh Just raz'n you Wayne.

On the "coating" process of the Alusil; I thought it was quite the opposite. More of an etching process; taking away the Al, leaving the Silicon.

Doug Zielke · 11-18-2002, 03:55 PM

Quote:

Originally posted by Wayne at Pelican Parts

Alusil cylinders are one-time use. They cannot be re-ringed, as there are no replacement rings for them.

Wrong!

Porsche part #'s as per the Parts and Technical Reference Catalog (1974-1989) as follows:

930 198 967 00 ('78-'79 95mm KS Piston Ring Set)
930 198 985 00 ('80-'83 95mm KS Piston Ring Set)