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304 355 Stroker Kit Help

Discussion in 'V8 Development and Modification' started by 304RR, Aug 11, 2019.

  1. 304RR

    304RR New Member

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    I am about to start the process of building a 355 stroker from a VR V8. The engine is for a Range Rover so it requires more low down torque than high horsepower at high revs. I have an open plenum manifold with an Impco 425 LPG carb, roller rockers and Commodore SS headers, the cylinder heads are standard.
    There are so many different stroker kits available with different journal sizes, crank manufacturers, rod length/type and piston types I am not sure which of these would be suitable. The price of these kits also varies quite considerably. Which kits have people used, and which ones should I stay away from? Which kits would be recommended?
    I am looking at a camshaft somewhere around a Crane H268 or H276 as I would like torque from as low as possible, and as its LPG, a compression ratio of 10.0:1. Ideally power in the 1000-4500rpm range would be good.
     
  2. EYY

    EYY Well-Known Member

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    Single 425 will limit you - I wouldn’t bother with a stroker unless you were to run two of them really. But if you must, run with the 276. It’ll run out of air mid to upper rpm.

    Go for a chev journal scat kit. Cheaper to rebuild down the track and you start with new rods too.
     
  3. Deuce

    Deuce Super Stock

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    Would you not be better off using the stock banana manifold? Makes great torque all through the low rpm.
     
  4. EYY

    EYY Well-Known Member

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    OP wants to do away with fuel injection by going the 4 barrel impco gas carby it seems. If going mixer gas then the 4 barrel manifold is the way to go for ease of conversion and simplicity. Gas likes single plane manifolds too.
     
  5. 304RR

    304RR New Member

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    I do have a banana manifold which I could use. My main concern is which of the 355 stroker kits I should consider using, and those that are not so good.
     
  6. Deuce

    Deuce Super Stock

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    In regards to strokers:
    - h-beams are for strength at a level above what you are aiming. Stick to I-beam for ease of clearnacing (VR block may be cast with sufficient clearance)
    - scat crank with chev journals seem to be the go. Then you can use chev 383 stroker rod/piston combo with it and they are one of the cheaper options to come across.

    Stock heads with 5cc dish piston give great compression ratio. Go a bigger dish if you want to tame it down a little.

    Then cam it to suit the above choices.
     

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