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Thread: 906/Carrera 6/911R motors - characteristics

  1. #51

  2. #52
    Langheck

    Means "long tail" in German. There were two 906s: the short tail and long tail.
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389

  3. #53
    Thanks.

    What type of heads did the 906/Carrera 6 engines have?

  4. #54
    They had the 2 liter deep dome head profile and 38mm ports. I [i]think[/] they had 45I/39E valves like the '69S heads, but they might have been smaller. If so the only difference between the 906 and '69S heads would be the ports and twin plugs. Some had MFI ports, some did not.
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389

  5. #55
    With the exception of a 906 Mag Crankcase and the 906 Mag Upper Valve Covers...

    I have the rest of the 906 factory parts so I can build a correct factory motor, several parts are in fact NOS; 906 Center-Lube Camshafts, 906 Center-lube Chain-Boxes and Covers, 906 Mag Intakes, 906 Early Marelli Twin-Plug Distributor, 906 Ti Rod Thrust Bearings, 906 Flywheel, 906 Clutch Disc and Pressure Plate and a set of 906 Cylinders to name a few. This is the results of many years of collecting all the right parts.

    Can anyone help me source a pair of OEM 906 Mag Upper Valve Covers? I gave up on finding the crankcase.

    I can be reached directly via email at AJSERRANO at MSN dot COM. Thank you for your help.

    PS: Recently I was fortunate to sourced a pair of 906 Mag Lower Valve Covers, the 906 Motor Mount and Twin Marelli Coils with Ballast Resistors. Below is a nice pix of a 906 motor recently taken at the Collier Museum.

    2018-03-30_23-06-49.jpg

    2018-03-30_23-07-49.jpg


    906 Mag Valve Covers recently sourced.

    2018-03-27_15-40-49.jpg


    906 Mag Motor Mount recently sourced.

    2018-03-27_15-38-15.jpg

    906 Marelli Twin-Coils

    20180310_105845.jpg

    I also have the 906 exhaust, very cool pieces indeed--and they fit my 914-6 GT for that real authentic 906 sound!

    2018-03-30_23-35-47.jpg

    Here is a sample pix of the 906 Mag Upper Valve Covers I'm missing. Anyone?

    2018-03-30_22-56-01.jpg

    Thx!

  6. #56
    Quote Originally Posted by beginner View Post
    Thanks.

    What type of heads did the 906/Carrera 6 engines have?
    Some detailed photos of the 906 (1966) Twin Plug Racing Heads...

    Bruce Anderson book.

    906 Twin Plug Heads Casting Date 9 69 - Photo 00.jpg

    906 Twin Plug Racing Head - NOS

    906 Twin Plug Heads Casting Date 9 69 - Photo 00a.jpg

    906 Twin Plug Heads Casting Date 9 69 - Photo 00b.jpg

    906 Twin Plug Racing Head - Casting Number

    906 Twin Plug Heads Casting Date 9 69 - Photo 00c.jpg

    906 Twin Plug Racing Head - Casting Date

    906 Twin Plug Heads Casting Date 9 69 - Photo 00d.jpg

    906 Twin Plug Racing Head, ATE Intake / Exhaust Valves, NOS (for lash-caps)

    906 Twin Plug Heads Casting Date 9 69 - Photo 00e.jpg

    906 Twin Plug Racing Head, ATE Intake / Exhaust Valves, NOS (for lash-caps)

    906 Twin Plug Heads Casting Date 9 69 - Photo 00f.jpg

    906 Twin Plug Heads Casting Date 9 69 - Photo 00g.jpg

    Free bump!

  7. #57
    These are 914-6 GT Twin-Plug Racing Heads. Same as '906', same casting numbers, but with a later casting date code of 09 69.

    The 906 heads were removed from a factory 914-6 GT race motor many years ago.

    906 Twin Plug Heads Casting Date 9 69 - Photo 01a.jpg

    They became available and I made the purchase.

    906 Twin Plug Heads Casting Date 9 69 - Photo 01b.jpg

    Same 906 / GT heads at Ollie's for restoration.

    906 Twin Plug Heads Casting Date 9 69 - Photo 01.jpg

    906 Twin Plug Heads Casting Date 9 69 - Photo 02.jpg

    906 Twin Plug Heads Casting Date 9 69 - Photo 03.jpg

    906 Twin Plug Heads Casting Date 9 69 - Photo 04.jpg

    Note the casting number and production date. For a 914-6 GT.
    The 906 plastic cars were long gone at this point, but their racing parts production legacy continued in other models.

    906 Twin Plug Heads Casting Date 9 69 - Photo 05.jpg

  8. #58


    Do you have any detailed dimensions for these valves as we are planning to manufacture the 'solid' rockers later this year and I think that these valves differ from stock valves in their length above the keeper grooves.

    It would be good to know as it may be worth trying to source the correct valves.

  9. #59
    Member #226 R Gruppe Life Member #147
    Join Date
    Feb 2009
    Location
    Portland, Oregon
    Posts
    1,313
    Valves are approx 2mm shorter, when at my notes I'll confirm. Early and late castings differ, in provisions for air injection and MFI casting boss as models for street and racing advanced. Having rebuilt 3 R drive trains in the last 10 years I accumulated a base of knowledge. Gordon

  10. #60
    A few of my measurements with a dial-caliper from a collection of 906 ATE Valves I have.

    Keep in mind that these are used valves and the stem may have been ground.
    Besides all that, my measurements at the time were done rather quickly, taken only for a point of reference.

    Intake ATE 3056 - 45mm / 111mm

    906 Twin Plug Heads ATE Int Exh Valves - Photo 01.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 02.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 03.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 04.jpg

    Intake ATE 3057 - 39mm / 111mm

    906 Twin Plug Heads ATE Int Exh Valves - Photo 05.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 06.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 07.jpg

    906 Twin Plug Heads ATE Int Exh Valves - Photo 08.jpg

    ...more to follow.

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