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Thread: Can a VB 1800 accept an MA crank for a small stroker?

  1. #1
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    Can a VB 1800 accept an MA crank for a small stroker?

    Short story, a friend is freshening a 1974 VB-powered Courier. Pistons are domed but sit 2mm in the hole. 8.3:1 seems too low. He's got a set of .75 over stock-type domed pistons and a long-tube header, Weber and adapter. Daily driver in SoCal.
    I'll do a mild port job, match manifold, good seat work. He's looking for a cam choice. I may make a manifold to head spacer to add some runner length.

    Adding 4mm stroke seems perfect way to get the pistons up to the deck?
    Bearings look to be the same? F/MA? Wiki is vague and I haven't an MA crank to compare to the stocker.
    Will zero-deck work without domes hitting head or valves? It'll be checked for clearance and minor notching is ok for us.
    I'm assuming that 2mm of block cut is excessive and P'sO the tensioner?

  2. #2
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    8.3:1 with 4.778cc/mm of stroke and 61.529cc at TDC, 449.165 swept
    Reducing TDC via pistons at +2mm (without stroke change) leaves 51.973 brings 9.64:1 CR
    Adding 4mm stroke for 468.278 swept and 51.973 TDC gives 10.01 which seems OK for an aluminum-head hemi chamber?

  3. #3
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    I'm going to finish pulling my F/MA out of my 1980 626 this afternoon and hopefully final disassembly after that. Do you need any particular measurements from the from the crank while it's out?

  4. #4
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    Quote Originally Posted by MrVito
    I'm going to finish pulling my F/MA out of my 1980 626 this afternoon and hopefully final disassembly after that. Do you need any particular measurements from the from the crank while it's out?
    Please! Pics and journal locations would be great!

  5. #5
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    Re: Can a VB 1800 accept an MA crank for a small stroker?


  6. #6
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    Please? lol

  7. #7
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    Got the engine out, but then ended up having to drive a friend 2 states away to pick up a car. Probably won't be able to work on her more until next friday. I'll make sure to post up lots of pics and measurements when I get to it though. Sorry about the delay man!

  8. #8
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    Haa. No worries. Thanks.

  9. #9
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    Re: Can a VB 1800 accept an MA crank for a small stroker?

    Try here fordcouriercollector.com

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