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Thread: Rover 3.9

  1. #1
    Join Date
    Jun 2014
    Location
    West Midlands
    Posts
    63

    Rover 3.9

    I have removed the V6 Ford in my new project and intend to go RV8 and wondered if it
    was a straightforward swap just adding a weber 38DGAS on a 3.9 as on my previous 3.5
    or are there complications (other than jetting and manifold) ?

  2. #2
    Join Date
    Jan 2015
    Location
    Paignton Devon
    Posts
    316
    I don't know about the Weber but ive just done this same swap over the winter and the engine swap although straightforward is more involved than you may realise, I did get a bit side tracked with lining the engine bay with stainless steel and rewiring the whole car but as a minimum you'll need new engine mounts, headers, rewire to sensors etc ( gauges may not be compatible with old sensors), new radiator with hoses and tube to suit, relocating/ renewing header tank/ coil, possibly steering shaft , and brake servo, plus propshaft etc, it's well worth doing I'm very pleased with the result but it was more work than I first envisaged
    As a rough guide I bought an engine, fully stripped and rebuilt it, sourced a gearbox and used mainly refurbed parts apart from the prop and all new engine parts did all the work myself apart from the exhaust and headers and some of the rewire and I reckon it cost me about £2500,
    As i say very pleased with the car now

    Roger

  3. #3
    Join Date
    Jun 2014
    Location
    West Midlands
    Posts
    63
    Quote Originally Posted by rpm015 View Post
    I don't know about the Weber but ive just done this same swap over the winter and the engine swap although straightforward is more involved than you may realise, I did get a bit side tracked with lining the engine bay with stainless steel and rewiring the whole car but as a minimum you'll need new engine mounts, headers, rewire to sensors etc ( gauges may not be compatible with old sensors), new radiator with hoses and tube to suit, relocating/ renewing header tank/ coil, possibly steering shaft , and brake servo, plus propshaft etc, it's well worth doing I'm very pleased with the result but it was more work than I first envisaged
    As a rough guide I bought an engine, fully stripped and rebuilt it, sourced a gearbox and used mainly refurbed parts apart from the prop and all new engine parts did all the work myself apart from the exhaust and headers and some of the rewire and I reckon it cost me about £2500,
    As i say very pleased with the car now

    Roger
    OK but can I run a 3.9 with carb(s) ?

  4. #4
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    8,457
    I'm running a 7 litre engine with a carb....so yes.

    But maybe you need a copy of this:

    https://stellabooks.com/books/david-...ngines/2125894
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

  5. #5
    Join Date
    Jan 2015
    Location
    Paignton Devon
    Posts
    316
    Yes I'm running with a Holley 390 on an offenhauser inlet, it goes well

  6. #6
    Join Date
    Jun 2014
    Location
    West Midlands
    Posts
    63
    Quote Originally Posted by rpm015 View Post
    Yes I'm running with a Holley 390 on an offenhauser inlet, it goes well
    Yes, perhaps I'm not making myself clear -not interested in 7 litre , I need to know can I run a 3.9 litre Rover V8 on a carb -as opposed to injection ??

  7. #7
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    8,457
    I quoted my big block car because you asked about moving up from 3.5 to 3.9 litres.
    Why do you think moving from 3.5 to 3.9 is problematic fr a carb? Or are you asking for a ready-made solution?
    Anyway, a quick google search reveals :
    https://www.lrukforums.com/threads/c...to-carb.75078/

    Your bigger problems is in dealing with the limited power/torque that the Granada MkII rear axles can handle.
    If you are thinking of adding Jag IRS then you will have problems at registration and test in avoiding a Q-plate as you may not have sufficient donor parts for an age-related plate.
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

  8. #8
    Join Date
    Jan 2015
    Location
    Paignton Devon
    Posts
    316
    You seem to be confused, to clarify, my engine is a rover 3.9 v8, it is running with a Holley 390 carburettor and works perfectly well

  9. #9
    Join Date
    Jun 2014
    Location
    West Midlands
    Posts
    63

    Rover V8 3.9

    Quote Originally Posted by rpm015 View Post
    You seem to be confused, to clarify, my engine is a rover 3.9 v8, it is running with a Holley 390 carburettor and works perfectly well
    Not confused - just making sure there are no hidden gremlins in the change - we got there finally.
    Rear is fine, I didn't ask about the diff -I have put V8's im MK1 Escorts, Mazda RX7's, 1930's Austins etc etc etc but have always been 3.5 normally aspirated -some with SU's and others with Weber 38DGAS .
    Thanks to all.

  10. #10
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    8,457
    Louie, if that is your name - people have tried to help, and offered advice in the best way they can.
    But your tone appears abrupt, patronising and dismissive, which is unhelpful.

    As you are a newbie here, I would suggest you need to adopt a more polite tone of request and response, and moreover, be clearer in what you are asking if you want people on this forum to help.
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

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