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A special find in a 73"S"
When this engine was removed from it's chassis, a 1973 911 S (with Bromos race history) we were told it was a 2.7 RS. Imagine our surprise when we discovered that the engine was actually a 3.0 RS. A single plug 3.0 MFI engine built on a sand cast RSR 3.0 engine case. In 30 years this is the only one I've ever seen.
http://forums.pelicanparts.com/uploa...1432737678.jpg http://forums.pelicanparts.com/uploa...1432737712.jpg http://forums.pelicanparts.com/uploa...1432737743.jpg http://forums.pelicanparts.com/uploa...1432737772.jpg http://forums.pelicanparts.com/uploa...1432737836.jpg http://forums.pelicanparts.com/uploa...1432737878.jpg http://forums.pelicanparts.com/uploa...1432737902.jpg http://forums.pelicanparts.com/uploa...1432737970.jpghttp://forums.pelicanparts.com/uploa...1432738251.jpg http://forums.pelicanparts.com/uploa...1432738336.jpg |
Over the next few weeks I'll share the build we did on this very rare engine.
Before http://forums.pelicanparts.com/uploa...1432738859.jpg After http://forums.pelicanparts.com/uploa...1432739159.jpg http://forums.pelicanparts.com/uploa...1432739184.jpg |
Wow! That would be one time 'non-matching numbers' actually added value!
Look forward to the story. |
Henry ... I saw pics of the headers in another post. where where they source or were they a in house custom job?
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Fwooor
That should come with a NSFW warning :eek: |
So cool.
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Very Cool.
Are the case dimensions the same as the early sand cast case? I realize head stud and spigot are likely larger to accommodate the (presumably) 95mm P/C set. |
wow, Nice find Henry.
regards, al |
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The unique characteristics that are different than the early 2.0 sand cast case is stud spacing half way between between 2.0-2.7 and 3.0-3.3. Very rare. Special heads as well. The other difference is the 5 studs for mounting chain boxes vs 3 studs and 2 pins. The intermediate shaft has thrust bearings similar to what was common on later cases. There are also a considerable number of reinforcements in this casting including a larger base for the cylinder mounting. |
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signing-up.
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3.0 engine.......
Very interesting and a real "looker"! Are those Mahle pistons? If so, do you know the compression ratio? Also, what level of horsepower do you expect this engine to make? The pistons look very similar to the Mahle pistons that I used in my 3.3SS build. My set were 10.1:1 compression.
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http://forums.pelicanparts.com/uploa...1433176105.jpg
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very neat!
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I cant believe I almost missed this.
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Very rare engine. What a surprise.
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Some Supertec, some Burnham Performance and some MFI Werks magic all came together to produce a very special pump. http://forums.pelicanparts.com/uploa...1433270999.jpg http://forums.pelicanparts.com/uploa...1433270872.jpg Burnham Performance 1071 Avenida Acaso ste.D Camarillo, Ca. 93012 805-240-6931 rennwerks@hotmail.com MFI Werks 10227 N.W. Swallow St. Seal Rock, OR. 97376 Mark Jung 541-563-3702 info@mfiwerks.com |
Very Cool Motor !
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Brumos called-they want their engine back.
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It's too bad that has to go in a car and get dirty. Noyce.:D
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I don't want to steal Henry's thunder but I believe the strut is more of an insurance policy to lessen vibration and keep those aluminum mounting ears intact at the base. Aluminum does fatigue and a lot of these parts have plenty of cycles on them by now.
____ Cool find Henry - thanks for sharing. Not sure why folks are voting this down as you won't likely see another any time soon. Quote:
About the CAD/CAD II/Zinc plating process - I was curious about your input on when and where to use it. I understand fastener coating technology has improved since these engines were built but from an appearance standpoint there is a desire for close to original as possible so the newer greenish coatings are out. The average DIY can get their hands on kits to do some CAD/Zinc coating in the garage which really adds a nice bling factor to a solid build. But like Lund accessories on a Chevy pickup, there must be a point when you've gone too far... when you've "Lunded out" as they used to say. I agree once you start on the visible hardware, it makes sense to have it all match. I noticed the threads weren't plated on the through bolts and the neck of one pictured doesn't appear to be coated either. Is there a reason to not coat the threads or has the coating worn through from pre-assembly activities such as checking bearing clearance? Quote:
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http://forums.pelicanparts.com/uploa...1433435173.jpg |
Henry,
Am I correct in thinking you will have a closed oil system for the pump that is not connected to engine oiling system. I recall seeing that first on one of your builds. Really top shelf work by the way. Thanks for sharing. |
Thanks!
And BTW, great shot through the stacks!! |
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We discovered 20+ years ago that the engine oil would super-heat the pump. With the exception of a possible improvement on hot restart the heat had no other benefit. By isolating the pump we could insure the quality of the pump oil and isolate the engine from any possible fuel contamination of the oil. The engine runs a Supertec cold start device making the thermostat obsolete. Our cold start device is controlled by the driver via a small level next the the hand brake. http://forums.pelicanparts.com/uploa...1433444332.jpg If you choose to seal your pump it is important to remember that as the engine heats up, pressure will build inside the pump forcing the oil passed the seals and gaskets. To relieve this pressure we designed a neat little breather that double as a filler for pump oil. The breather is also a little filter. This breather will retrofit to any Bosch MFI pump. http://forums.pelicanparts.com/uploa...1433444522.jpg http://forums.pelicanparts.com/uploa...1433444551.jpg |
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What a unique build. Thanks for sharing
Henry |
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Absolutely beautiful engine build.
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The best toy in the best Toy Store... Thanks for making us all crazy, Henry. You are an artist..
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very nice as usual henry...)) btw, who's headers & do you have a pic of the muffler you will be using...? I live for pics like this from henry...)))) just por-fect...
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http://forums.pelicanparts.com/uploa...1434482499.jpg |
Beautiful work!
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I'm certainly no expert, but just wondering if this could have possibly been an IROC motor? I think they were 3.0 RS-based cars. The uniqueness of it would sort of make sense. From what I have researched, Roger Penske bought most of the IROC cars when Porsche ceased support of the series after the inaugural season. He then resold them to various race teams. Maybe Brumos bought one? Anyway, just a thought.
And BTW, beautiful build. |
Fantastic stuff! I love the look of the finned lower valve covers.
Those Mahle pistons look to be really light. I see they were plunge-cut/milled under the crown all around the pin bosses Curious what size piston spray jets are used? Reason I ask is because I noticed the 964 oil pump. |
work of art
Henry
thanks for posting these photos, truly a modern masterpiece. |
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SC squirter for under 260hp Turbo squirter up to about 350 964 for 300 to 400 hp There is an over-sided 964 squirter that is appropriate for higher heat engines. |
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