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  1. #1
    Adrian Guest

    Rover V8 Cylinder Heads

    Guys
    Does anyone know how to identify what type of heads they have and whether there off a Vitesse or not?

    I've been led to be believe that the later Vitesse heads were ok for Unleaded.


    Cheers

    Adrian{-} {-}

  2. #2
    russell_ram Guest

    RE: Rover V8 Cylinder Heads

    All Rover cylinder heads are OK for unleaded.

    There is no difference between a Vitesse cylinder head and a standard SD1 head . All heads between 76 and 95 are the sameas far as we are concerned. Before 76 valves were smaller (inlet 38 vs 40mm, ex 34 vs 33mm dia). Post 95 (10 bolt heads) are different - port bigger inside, fire face moved upwards for composite gasket and, of course, only 10 vs 14 cyl head bolts (these are the best std heads).

    Russ

  3. #3
    Join Date
    Feb 2007
    Location
    Stoke on Trent.
    Posts
    387

    RE: Rover V8 Cylinder Heads

    Vitesse heads are identical to standard heads. The inlet valve though, has a waisted stem to improve gas flow, but as Russ says they will take unleaded.

    How is the build progressing near the SVA yet?
    Kev

  4. #4
    Join Date
    May 2002
    Location
    Leicestershire, UK.
    Posts
    1,492

    RE: Rover V8 Cylinder Heads

    >All Rover cylinder heads are OK for unleaded.

    Hmm. If this is the case then I was ripped off by a certain Rover V8 'specialist' a little time back. Kinda pissed me off now.*# I won't mention names on line but will if emailed directly

    Cheers

    Richard
    (It'll only be a five minute job)
    Richard (-the one with 2 mad Wheaten Terriers)
    Ex-GD 325bhp RV8 builder/owner

  5. #5
    Adrian Guest

    RE: Rover V8 Cylinder Heads

    Hi Kev,
    Mostly done now, just got to order the seats and trim. Been waiting for a clutch conversion kit for three months but hopefully that will be here soon.

    If your passing come and have a look.


    Adrian

  6. #6
    Adrian Guest

    RE: Rover V8 Cylinder Heads

    Russ,
    Having checked I have 10 bolt heads with 40mm inlet valves and 33mm exhaust.

    So are you saying that the valve seats etc are ok for unleaded? and that the 10 bolt versions are best?


    Adrian

  7. #7
    russell_ram Guest

    RE: Rover V8 Cylinder Heads

    Adrian,

    yes, sorry, my last post was gramitically ambiguous! Late 10 bolt heads are superior (ports & valve stem seals mainly), they were introduced with the last New Range Rover in 95 (but also carried over to all other RV8s at the same time. Easiest way to identify is that they do not have the 4 'outer' cyl head bolt holes drilled. These must be used with composite gaskets otherwise you'll end up with a comp ratio around 8.5:1 with 'high comp' pistons! They are entirely suitable for use with unleaded, afterall the are design for use with 91RON US and third world fuel.

    You should be able to find a casting date mark on the outside face by the spark plug holes.

    Russ

  8. #8
    Adrian Guest

    RE: Rover V8 Cylinder Heads

    Russ,
    Thanks for that.

    Bad news for em though as both my engines have 14 bolts in the heads. (I couldn't count before)

    So I might have a look round for some newer ones.


    Cheers
    Adrian

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