454 Build info
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454 Build info

  1. #1
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    Default 454 Build info

    Hello have a 1975 Hustler jet boat with a brand new Dominator jet pump with a aa aluminum impeller. I have a 454 cast no# 361959 and the heads are cast no#353049. Its been bored to .30 over but I'm going to go to .60 with it just curious if anyone knows any decent 468 biulds out there that'll give me at least 500hp on a low budget. I work at a jet pump manufacturer place but don't have a lot of knowledge in building motors so need some advice ty.

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  3. #2
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    1975 hustler 18"
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  4. #3
    Some guy obnoxious001's Avatar
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    As a guy that has built a lot of engines, I can tell you with the 049 heads you should easily hit your goal, cam selection is going to be the key, matching your induction, exhaust and of course your 049 heads. I would tend to keep compression down in the mid 9's for pump gas, since you have iron heads. I don't know what octane your local pump gas is, but I like to stay slightly conservative in case you get a bad load of fuel sometime.

    I built one that was a 9.6-1 468 that made 617 hp on pump gas with a single 850 cfm carb, and was built for a jet boat. It did use rectangular port heads and a solid roller cam that probably don't fall into your description of "budget"

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  6. #4
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    Tyvm iv been told those cast heads are decent ty for the advice

  7. #5
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    I have an 86' 21ft Dana Cruiser w/ Berkley JE w/stainless A2 impeller. Currently assembling Chevrolet Mark IV .100 over (475 CID). I'm brand new to the site, definitely not a "know it all" & want to introduce myself & share what little I may know. My last build was the same engine at .070" (468). My engine ran 5100 rpm w/rebuilt pump & consistently @ 71-72mph on GPS all last summer & it started & ran like a top all season. (I live in Alaska & we have about 3-4 good months of lake boating). The Berkley impeller chart indicates that it takes 550 hp to make that rpm. I was running 6055-19 Edelbrock Rectangular port Aluminum heads, good springs, valves, retainers, locks & girdles. Edelbrock 118cc open chamber, 2.19" int, 1.88" exh, SRP 21237 (-23cc) forged 4032 10.25:1, 3/8 push tubes, Lightning jacketed headers below the swim platform (waterline), 17046 Felpro Marine head gaskets 4.370 bore, .039" compressed thickness, Holley Marine 4150 P/N 0-80537 750CFM w/50CC squirts & Edelbrock 7562 Performer RPM Air Gap. MSD Marine Billet HEI distributor w/bronze gear, valve train was Isky RR652 396652,.650/654, 274/[email protected], 110 LSA. (3800-7500) rpm cam & Milodon HP/HV oil pump & 10 qt Milodon pan. The engine ran very well but expect it will run markedly better w/the new cam & hope the valve train will be more durable with the the severe duty lifters & stainless rockers.
    I'll share what I've learned. The trunion bearing from 1 of my Crane aluminum gold rockers & the Comp cams roller lifter on the same cyl failedat the very end of last season ...ran perfectly at 5K for 30 mins then 'popped' and ran with a noticeable miss. Although the boat ran very well almost daily for 3-4 mos I've come to learn (think i've learned) that I had too much cam for the RPM my mill could achieve without going to a milder impeller (less coarse) and that valve-train stress was far higher than necessary. I like the A2 because it keeps the rpm low, the new cam should be much better suited as it makes torque at 2500 & peak HP @ 6K. I have much to learn...as the parts come i'll put a study on ring gap & cam to crank timing. Ring gap is very important as is a few thousandths additional clearance bore to piston for high continuous duty cycles and raw water being fed into the engine. For the time being the best info I have is .006" piston to cyl clearance & .021 top ring gap, .0025 second ring gap. I don't have much spare cash & learning is expensive. I've went to Crower stud mount stainless rockers @ 1.7:1, Crower severe duty solid roller lifters w/HPOP, & Crower solid roller cam 01475 mechanical roller, 242/250 deg dur @ 050 lift, 1.7: 1 ratio .581/.573 gross lift 112 deg LSA.
    Running stock length H Beam Rods, Cast steel crank, 1986 high performance 2 bolt main block & all ARP fasteners.
    Last edited by Dana 21; 06-15-2016 at 01:25 AM.

  8. #6
    Senior Member orange bahner's Avatar
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    Here is my budget build. I am very happy with it.

    454 4 bolt Hi Perf block bored .060 over (4.31)
    Hi Perf 990 rectangular port heads pocket ported and polished chambers 118 volume
    stock rods and crank with ARP bolts (balanced and blue printed)
    Keith Black Hyper pistons part#257 25.5cc domes (10.5 cr)
    Comp Cams Xtreme Marine xm296hr grind hydraulic roller cam (566 lift 296/302 duration) 112 lobe seperation
    Comp Cam roller lifters
    Comp Cam one piece push rods
    Comp Cams Ultra Pro roller rockers
    Comp Cams Springs and retainers
    Cloyes Double roller timing chain
    Cloyes Timing cover with cam button
    Melling high volume high pressure oil pump
    14 quart Dooley oil pan
    Edelbrock Victor jr 454r manifold
    850 Double pumper holley
    Break Out AnotherThousand


    A good friend will comes bail you out of jail, BUT a True friend will be sitting next to you saying "Damn we f#*ked up"

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