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  1. #1
    Do you ever leave? HPE PETE's Avatar
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    Default 372 -3 street engine

    building a 372ci holden stroker that will see street use with the occasional club circuit race

    engine details are

    factory VL Group A 4 bolt .904 lifter bore block
    CSR nitrided iron 3.650 stroke 2.00" journal crankshaft
    Scat ultra Q-lite 5.850 small journal H beam rods
    CP bullet pistons
    custom HYD roller camshaft
    285cfm YT -3 heads 2.02 1.6 ferrea 6000 series valves
    modified oil pump and oil system mods
    ASR circuit race sump with external pickup
    TP high rise single plane

    owner requirements are 500+hp that drives nice on the street and can go for the occasional club race and drive long distances reliably, besides the crankshaft and camshaft no exotic custom made components, engine will be backed by a TKO600 gearbox and 9" diff

    cylinder heads are near completion but heres a quick refresh of the heads.








  2. #2
    Do you ever leave? cava454's Avatar
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    Stupid qn. But when u say .904 lifter bore what's that mean Pete?

  3. #3
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    Quote Originally Posted by cava454 View Post
    Stupid qn. But when u say .904 lifter bore what's that mean Pete?

    Correct me if im wrong pete but lifter bores where sized different in the group A blocks correct??

  4. #4
    Senior Member sik66's Avatar
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    VL got Chrysler size and VN got ford size lifter bores....

  5. #5
    Senior Member sik66's Avatar
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    Ohhhh yeah VL GPa...ie the walky block...the maroon ones only got some steel main caps....and that's about it....4 bolt caps had all 4 bolts each cap,all same length,VN ones were stepped....

  6. #6
    Do you ever leave? HPE PETE's Avatar
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    1st we had the block line honed and bearing measurements taken so the crank could be ground to size for desired clearances

    next its time to clearance grind the block



    clearance on the inboard side of the cylinder is very good and requires very little grinding, but the outboard side with the longer head of the ARP2000 series rod bolts needs a lot grinding to clear, i grind the block so we have .040 clearance and then we turn a small chamfer on the bolt head to give us .060 clearance





    the block also needed clearance grinding for the counter weights in the corner radius of the main bearing saddle and a couple of places at the bottom of the bore, it didnt touch but was under .040 clearance, if the thrust clearance increased over time the crank would make contact with the block




    not much clearance here either so we had to grind this area in a few places as well




    i should also mention this is a virgin bore block so rather bore it 1st then clearance grind it and scratch new pistons and bores i just use a stock 4.00 holden piston and cut away the skirt to clear the counter wieghts


    Last edited by HPE PETE; 02-04-2014 at 11:14 PM.

  7. #7
    Do you ever leave? HPE PETE's Avatar
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    Quote Originally Posted by sik66 View Post
    VL got Chrysler size and VN got ford size lifter bores....
    that is correct, lucky crane do a .904 HYD roller lifter to suit these blocks

  8. #8
    Senior Member sik66's Avatar
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    From memory I think Isky do a set,with a link bar that fits as well.....might have been solid rollers but....il haveta have look out in shed tomorrow.....

  9. #9
    Do you ever leave? HPE PETE's Avatar
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    that would be good to know, crane only do hyd rollers for the .904 blocks

  10. #10
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    Looks good Pete are you also grouting it ?

  11. #11
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    Nice,I bought one in a vt clubby couple months ago,but -9 vn grp a manifold solid cam 6spd
    Goes good 420rwhp only spinning to 7k not sure of bottom end still making power but,take out for
    Freshen up soon,real nice to drive wakes up at 4k
    Ps 1st post hi,been sniffen around a while it's a top site
    Cheers

  12. #12
    casual poster vr304's Avatar
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    I know it's not going to happen but would there be any benefit to using a -9 (vn) style head on a setup like this?? Or are the -3's more beneficial for down low punch??

  13. #13
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    How u like the look of the Csr casty Pete?

  14. #14
    Part of the furniture phtwgn's Avatar
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    Another awesome thread pete!

  15. #15
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    I went -3 for the period look of the car it's going in, more than anything. Plus wanted to see what can be achieved with this type of combo. VN headed motors are all too common in earlier Holdens these days but old school comes at a cost though..
    Last edited by 76XSS; 03-04-2014 at 07:30 PM.

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