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Registered
Join Date: Jun 2004
Location: Ottawa Ont Canada
Posts: 180
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for the engine expert what's what
ok here is a fun question, as per the picture you can see 2 pistons, they are both 80mm ( yes for a 2.0) one is brand new and the other had to had the cylinder cut to remove, as you can see they have a different shape ( the dome), the valve pocket is different, they seem to have the same height , I know they will fit but why are they different
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9140431696 painted, with wheels and brake , with all elctrical working , engine in assembly soon to be driven 011850275 911S soft window targa next in the garage 2000 S4 stage 2 660R stroked |
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01-23-2007, 05:09 AM
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Join Date: Dec 2001
Posts: 9,569
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With the long skirt like that, and yet with the oil ring at the top, they are definitely T or E pistons. The different valve reliefs mean you probably have one of each.
My other guess is that you have one Mahle, one Kolbenschmidt. Weigh them, I bet they are different. What marks are on them, exactly?
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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01-23-2007, 05:14 AM
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Registered
Join Date: Jun 2004
Location: Ottawa Ont Canada
Posts: 180
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piston
those are from 2 different set, on the right, one i just got ,,supposed to be mahls they have a small m punched on top and a metal reinforcement near the pin inside and on the left the old out of my 914-6 engine ( supposed to be a T)
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9140431696 painted, with wheels and brake , with all elctrical working , engine in assembly soon to be driven 011850275 911S soft window targa next in the garage 2000 S4 stage 2 660R stroked |
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01-23-2007, 05:23 AM
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Registered
Join Date: Jun 2004
Location: Ottawa Ont Canada
Posts: 180
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9140431696 painted, with wheels and brake , with all elctrical working , engine in assembly soon to be driven 011850275 911S soft window targa next in the garage 2000 S4 stage 2 660R stroked |
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01-23-2007, 05:25 AM
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Registered
Join Date: Jul 2001
Location: Thunder Bay, ON
Posts: 4,551
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I've got 69E, 68S and 906 single pistons on the shelf and the valve relief on yours are too small to be either a 911L or 911E.
It looks like you have 2 different T pistons - The one you removed from your engine look like a 69T piston (same as 914/6) The other? maybe a 68T? If you are doing a rebuild, any interest in some 68S Pistons w/ or w/o cylinders? Regards, Andrew M
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1970 911E - track / weekend car 1970 911S - under restoration 1986 930 Slant Nose - fun car |
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01-23-2007, 07:25 PM
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up-fixing der car(ma)
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Agree with Andrew. The new piston looks like a '69T/914-6 piston. The other, I'm not sure, don't think I've seen it before. Not large enough valve reliefs (and no oil scraping ring at the bottom of the skirt) so it's not a '65-68 "normal"/911L piston. Definitely not 911E ('69), either.
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Scott Kinder kindersport @ gmail.com |
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01-23-2007, 10:33 PM
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Location: Ottawa Ont Canada
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i would have bben very interested in the set of 68s but I now 2 nos set the one shown here and a 2.2 é2.4 set so unless they are really cheap or you wanna trade i would have to put it on hold for now, at leat i now know that they will work just fine, just need rings now
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9140431696 painted, with wheels and brake , with all elctrical working , engine in assembly soon to be driven 011850275 911S soft window targa next in the garage 2000 S4 stage 2 660R stroked |
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01-24-2007, 03:48 PM
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