496 stroker
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496 stroker

  1. #1
    MPR FAB southwind011's Avatar
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    Default 496 stroker

    i going to be saving my pennys to build a 496 stroker, from what i have read im looking at 500-550 hp. that means i have to put money in to the pump. my pump is bone stock right now (it is a jc) what should be done to the pump to, besides a stainless impeller

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    Senior Member Futs's Avatar
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    my brothers 496 made 710 at 6200 rpm on pump gas and that was a conservitive build.

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    MPR FAB southwind011's Avatar
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    do you have any specs on the build

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    Senior Member Futs's Avatar
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    YEP.......2 bolt block, eagle crank, rods, AFR 305 heads tunnel ram with 2 650's a straub cam and srp 10.2:1 pistons.

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    MPR FAB southwind011's Avatar
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    Quote Originally Posted by Futs View Post
    YEP.......2 bolt block, eagle crank, rods, AFR 305 heads tunnel ram with 2 650's a straub cam and srp 10.2:1 pistons.
    i have a two bolt and just got a pair of 781 so i can throw my peanut heads in the trash, im going to run a prof rpm with a single holly dp. looking for 9.5-10:1 on the cr

  8. #6
    About 500' AGL MudPumper's Avatar
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    Quote Originally Posted by southwind011 View Post
    my pump is bone stock right now (it is a jc) what should be done to the pump to, besides a stainless impeller
    JMO...convert to a split bowl, detail bowl and impeller and add a loader if you don't have one already and a shoe and rideplate. If you are only gonna be running between 500 and 550 HP I wouldn't waste money on a Stainless impeller unless you plan on upgrading later and want to get it out of the way. As long as you aren't constantly unloading the pump an Aluminum impeller will work fine with 500 - 550 HP. Your money would be better spent on the other stuff listed above and detailing the Aluminum impeller.

    My old boat was the same as yours and made 485 HP. By having MPD do a Stage 1.5 blueprint and adding a loader I picked up 9MPH. This was with no other mods and no shoe or rideplate.

  9. #7
    Senior Member Futs's Avatar
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    Quote Originally Posted by southwind011 View Post
    i have a two bolt and just got a pair of 781 so i can throw my peanut heads in the trash, im going to run a prof rpm with a single holly dp. looking for 9.5-10:1 on the cr
    look at that build Barry just did..thing made great power.....(obnoxious 001) very basic build with the right combo
    606 hp and 500plus on the torque

    http://www.performanceboats.com//showthread.php?t=59303
    Last edited by Futs; 04-08-2010 at 05:47 PM.

  10. #8
    I'm No Expert Shaun's Avatar
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    My 498 stroker made 670HP at 5800 rpm, GM 990's, two 750's, chris straub solid roller cam, 10ish:1 comp.

    At the very least i beleive your going to need a loader. From what i've been told (and saw on a boat that was brought to MPD) when you start running faster than 70+ MPH you end up having problems feeding the top of the pump. This causes a jack hammer type affect in the pump and leads to blowing off the handhole cover. On my first motor (550HP) i went from running 79MPH to 84MPH by adding just a loader (no shoe, rideplate, or setback).

  11. #9
    MPR FAB southwind011's Avatar
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    what pump did you have

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    MPR FAB southwind011's Avatar
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    Out of 496 CID you can make 500 to 550 real easy. A set of 781's with a bowl blend and and nice valve job, single plane intake, and keep the compression to around 9.5 to 1 and you'll reach your goal. I would suggest going hyd roller for longterm reliability.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

  14. #12
    I'm No Expert Shaun's Avatar
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    Quote Originally Posted by southwind011 View Post
    what pump did you have
    It was a berk JC but i had my bowl converted to a split boat (JG) so i could run attachments (droop, PD).

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