high compression 2.7RS engines?

[sithot]

Now - If I was to do it all over again today??? … I'd probably take the 2.4S engine out and put it on a pallet complete... and start the 2.7 h/c project on an old aluminum or turbo case.... But who had the money? ….
......…. If wishes were fishes....

An aluminum case would be my choice as well.
PS: Early Turbo/Carrera 3.0 cases that can use the 2.7 crank aren't falling out of the sky. The sort of good news is that the 2.0 case can take a lot
of "abuse" bore wise. But 2.0 aluminum cases have become gold too.

[SIMI BOB]

I believe there is a Mercedes gear for the cams that is the slightest bit larger in diameter to help with loose chains. Aaron Burnham used them in my 2.2S.
Bob B

[swisscheese]

"aluminum case", as in "the famous magnesium 7R case"? And why take another case? To keep your matching number cases uncut?

[sithot]

"aluminum case", as in "the famous magnesium 7R case"? And why take another case? To keep your matching number cases uncut?

"Pickle" (store) the original engine.

Use an early aluminum case with a lot of preparation work or '76-'77 Carrera 3.0/3.0 Turbo case. The 7R was the last generation magnesium case.

[Will 1967]

I'm doing 2.7 or 2.8 high comp in near future for "911r/hotrod build", high-comp (custom) Mahles are significantly more difficult to find than JE's even from Europe. But I believe custom Mahles are considered to be higher quality. I will use either new 90mm Mahle cylinders or old ones bored to 92mm and re-coated.
Doing this for spare early alu-case I have, I don't think it will need that much machining work; oil by-pass mod (needs anyway), piston squirters and boring spigots. Of course early turbo-case would need none of these. I have 7R case as well, but mag-cases don't last forever and then comes case saver etc work. (Plus to get it road legal here (as car is 66') on paper I need to use 2.0 case, Turbo or 7r case would need shaving engine number off as engine capasity/power is considered what case you use and too high for 66' )

[edmayo]

Wow !! You have some real bureacratic hoops to jump thru over there !

[sithot]

Wow !! You have some real bureacratic hoops to jump thru over there !

I was thinking the same thing.

[dirk07]

used a 3,0 carrera case or better says so: bought the viperngreen Ölklappe cause the spanish Rallye Team allready buildt in a 76 930/02 case.
They used 67s IDS, enlarged manifolds http://www.early911sregistry.org/for...ferrerid=29735 locking differential and a short gear setting. Better shift to 4th at 80km/h. very long 5th.damn cool acceleration but lousy highspeed.
May check bills for crankshaft, pistons,....if you decide to go 930 case

[dirk07]

66s may use a 76 930 case on street. It is within the 10year periode, but Porsche will give you the Motorfreigabe, which is mandatory to get a swb with a later engine registered, only with the 76 CIS and exhaust system installed.

thats why I had to switch back to CIS

[Will 1967]

66s may use a 76 930 case on street.

Unfortunately it depends of country even inside EU. Previously you could get swb with 3.6 registered, now even 2.7 will need massive paperwork if possible at all. So easiest with early alu-case. No-one then looks if its 2.8 pumping 250hp
And yes, totally idiot system (like our car taxation)

I believe there is one place in Germany which are pretty good with custom Mahles (I can’t remember name of that place now), I’ll ask them and post here if I get answer.