Konstantin

for sure not!
Do not post if you are not sure what you are talking about. block, head etcv are not the same even if tehy aRE look the same.
we discussed this many times

+
Konstantin

ehall

Hey Konstantin,
Since you own one of the few exampl;es on the road, would you mind posting what the actual engine specs and differences were, or perhaps post a link to a sight with the accurate info.
Thanks.
E

skene

Somewhat OT here, but I had a dream last night where I was pricing out parts to build a 2.8 or 3.0 engine for my turbo....I wonder if that's a sign that I need to stop working on my car late at night or work on it more.

jturbo

Konstantin,

Mark-87-951

Agreed! I've never seen anything like those copper crush rings.

jturbo

Konstantin,

I am quoting an article from the February 2004, issue of Excellence Magazine, entitled, "The Real Ones: Porsche's Best Turbo for 1993?", page 128. Some information contained in this article was sourced from a Konstantin Kotitsas. (any relation?) The following is a quote from this article.

"To build the 968's last hurrah, Porsche started with the 3.0-liter 968 block. 'According to Porsche Motorsport at Weissach, new pistons were required because Nikasil was used for coating instead of the usual Alusil,' notes Kotitsas. 'They gave a compression ration of 8:0:1 - not 7:5:1 as many people think.' The new pistons were cooled by oil-squirters inherited from the 968 block. The stock 968 used a 16-valve, DOHC head, but Porsche didn't want to go to the effort of developing a new version of this head for a limited turbocharged application. Instead, the factory wanted to use as many of its existing 951 components as possible. This created a problem because it couldn't use the tried-and-tested eight valve, SOHC 951 cylinder head. The reason? Its water-cooling passages were not compatible with the 968 block. The solution was in Porsche's parts bin, namely the cylinder head from the one-year-only 2.7-liter 944 engine of 1989. This engine combined an eight-valve, SOHC head with a 3.0-liter 944 S2 block and the crankshaft form the 2.5-liter 944 engine. Mating up to the 968 block, the 2.7 head worked with the 951's intake manifold and exhaust headers. Says Kotitsas: 'Porsche modified this head for use in the 'S' which included smaller diameter exhaust ports with cast-in ceramic liners, a different valvetrain, and lighter valve stems."

Andial951

interesting info.............did the value of my 89 944 with 2.7L block just go up???

Konstantin

hello
yes thats me in this article but somehow there is a small mistake there.
I said the head was similar to the 2.7 L head but it is NOT a modified one. yyyyyyou can not modified after. It has to build in this specs
The smaller diameter exhaust ports with cast-in ceramic liners, a different valvetrain, and lighter valve stems. are right.
there are 24 pages full of parts (about 200 parts) that are different in the 968 Turbo car.
for examble even the trottle body which looks similar it is not the same with the 951 or the 968. many parts are siilar with the one from the 968 or S2 or 951 but many parts are custom parts. this is the only way to have 500 NM at 3000 rpm and teh car pulls like a NA car in every gear except the 6th which is very tall.

here some pics of my cars (the 951 is not on the pic)

https://rennlist.com/forums/968-forum/282028-968-cs-strosek.html

Konstantin

Thom

The 968 TS head has features from both the 951 head (intake ports) and the 2.7 head (water passage, combustion chambers bored out to 104 mm).

The "different" valvetrain is probably "different" in that it has specific part numbers but I suppose no one really knows in what it is physically "different".

Konstantin

different valves, other valve stems, other springs etc etc. yes there are some who knows exactly what is used in this head

Konstantin

testarossa_td

Love your cars!

Konstantin

@ testarossa_td
This is really nice work. I am impressed!
Can you make the pict bigger. Wait till I make a pic with all three cars. I will sent it to you and see what you can do :-)

Thnaks

Konstantin