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Thread: Carb upgrades for Rover V8's

  1. 5th August 2010, 05:54 PM #1
    sclarke's Avatar
    sclarke
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    Carb upgrades for Rover V8's

    Guys,
    This will cause some argument, but i want everyones opinion please... with justification....

    Ive got a county with an auto and a Wover V8, its a 3.5ish

    was a 3.5, now mildly lumpy and goes well with the CD175 stombergs and LPG mixer rings.... BUT..... like all.... i want more....

    I have in my junk collection a 2 barrel rover manifold that suits a holley carb... i have some 1.75" SU's from a Rover, i have some 2" SU's from a Jag 4 litre and some more Stromberg carbs laying around...

    Happy to buy a 4 barrel and manifold to suit.....

    But should i machine out my manifold and fit the 2" SU's??? go the Holley, keep the CD175's? fit a edelbrock???

    The county is not a road car, its a toy, winching and steep inclines is a normal life for it.... so i need never to have a run out of fuel problem....

    Ohh i only use LPG to get to and from my destinations..... i like HP....

    Clarkie
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  2. 5th August 2010, 06:34 PM #2
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    Holleys don't like steep slopes. Gas doesn't care. I would look at a 2 or 4 barrell Holley for road use, topped with a New Gen mixer. The New Gen opens up in petrol mode so you get A1 highway performance. In the really rough stuff run gas for good low down torque and stability in the steep bits.
    Just my opinion
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  3. 5th August 2010, 06:41 PM #3
    Bigbjorn
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    Edelbrock dual plane and a Rochester Quadrajet. There is simply no other choice that works so well and is such an easy changeover.
    URSUSMAJOR
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  4. 5th August 2010, 06:49 PM #4
    PhilipA
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    Just a historical footnote.
    When they first were testing the RRC they tested them with 2 inch SUs and achived better power but apparently lost torque at lower revs so reverted to the 175CDs.
    That is one recollection. The other is that SU couldn't supply the quantity of carbys needed anyway and that is why they initially went Strombergs.

    Later the SUs would not pass emissions.

    No experience with Rochester, but sounds good. My experience with Holley has not been positive.
    Regard sPhilip A
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  5. 5th August 2010, 07:06 PM #5
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    HIF-6 SU, ex P6B V8 etc are the bees knees. Easily tuneable, excellent torque down low, and will flow easily enough.

    JC
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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  6. 5th August 2010, 09:00 PM #6
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    thats what i have..

    and the difference between mine and a vehicle with standard carbies is duly noticeable...
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  7. 6th August 2010, 04:45 PM #7
    CSK
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    Has anyone ever had any experience with the 'Boxer' manifold featuring 4 SUs?
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  8. 8th August 2010, 06:19 PM #8
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    I have seen a cross over manifold with 4 x DCOE Webbers positioned over the rocker cover feeding the opposite bank of cylinders. Chewed fuel but went like a greased stack of **** and sounded great. On a RRC and needed to cut the dip in the bonnet out and invert and reverse it and used as an intake.
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  9. 8th August 2010, 08:07 PM #9
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    Quote Originally Posted by incisor View Post
    thats what i have..

    and the difference between mine and a vehicle with standard carbies is duly noticeable...
    I know where they are going when the suzi goes in then

    CC
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  10. 9th August 2010, 05:35 PM #10
    lokka Guest
    I modded a 2 bbl holly so it would run at all angles all that needs to be done is block the original bowl vent with a 1/4 set screw and re drill the vent in the middle of the fuel bowl and fit a breather hose that runs back to the ventri via a small coiled hose it worked a treat for me and was easy to tuen and would give great economy if drove right on pulp or the 95 ron stuff .

    As for LPG id use a 300A mixer on the snorkel attachment to fit the holly or is you went the quadrajet way like brian mentioned use the same 300A set up .
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