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  1. #1
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    Default What will it make 393 clevo

    Mate just had his XE ute dynoed and its raised more questions than answers so thought I'd put the specs up and see what everyone thinks it should have made

    393 Cleveland, 10.8.1 compression, 3v chi heads, 6" manifold, 750 HP holley dp, 1" 3/4 pacemakers. Ice 7amp ignition. 3/8 fuel line. Cam Duration in 282, ex 290. Lift in/ex .611". Operating rpm 2600-6600. Harland sharp 1.73 ratio rockers and lunati lifters. Top loader and 3.55 ratio 9"

  2. #2
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    What size 3V heads ?
    Have the Pacemakers been matched to the exhaust port ?
    The Carb seems a bit small for one of these things.

    Knowing which head in the 3V range would be a big help.

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    Sorry mate 225cc heads and not port matched to extractors

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    We talking chassis dyno? . Solid cam? I'd say 360ish- 370 RWHP

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    Carb is a bit small, maybe 830-850 cfm.

    Fuel line is limited too.

    Cam is on the low side.

    Probably just under 400rwhp.

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    How much torque is what more interested in. Hydraulic cam and yep chassis dyno
    Last edited by 2jwb; 15-02-2018 at 09:51 PM. Reason: Info

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    480lb/ft.

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    Yeah thats what my maths led me to around that mark. The dyno operator did the pull in second gear and tried to tell my mate it made 831ft/lbs of torque lol he's not happy at all he originally discussed with the engine builder he wanted 600hp at the wheels he didn't mind spending the money needed and its only his toy when he's back home its only done 1000kms last 18 months

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    600 RWHP on an aspirated 393 ain't gong to happen on that combo

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    Yeah which is why he's annoyed at the engine builder. He set the goal and he fell way short so now he wants to see what he should do to get it to that 600 mark he wanted originally

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    Should be getting his money back for starters.

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    Quote Originally Posted by Gregaust View Post
    600 RWHP on an aspirated 393 ain't gong to happen on that combo

    600FWHP would be a mission

    600RWHP would be well over 700+ at the flywheel so i think he would need probably 2 full points of compression extra, a cam with .100" more lift and a better fuel supply. Was the manifold ported to support the heads?
    Last edited by EH179; 17-02-2018 at 05:54 PM.

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    Yeah well we know getting his money back won't happen

  14. #14
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    All depends really what his end goal is for what he wants to do. It's all just a number . But in reality even 600 FWHP is a tough streeter and capable of 10's if set up right.

    What did it make on chassis dyno?

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    Quote Originally Posted by gregaust View Post
    what did it make on chassis dyno?
    x 2

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