SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Sicaz66 on March 28, 2014, 10:35:45 PM
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Bostick built!
Pump gas friendly 489 for a 21' family cruiser. The requirements were: It had to run on pump gas (even the crap they have at the dock), had to work with wet exhaust system, needed to make all it's beans by 6k rpm, and needed to be driver friendly to pull skiers and tubes behind a very heavy 21' open bow. No problem...here's what we put together... Gm production 4 bolt block completely machined and worked by BRE, 10:1 SRP +.030 pistons, Edelbrock small Victor 300 heads reworked by BRE with a "little" port detailing, machined down to 115cc's, guides honed for marine application, and a nice 3 angle valve job, 6.385 H beam rods w/ ARP2000 bolts, Scat 4.250 steel crankshaft, Schneider custom hydraulic roller (low 230's intake, low 240's exhaust and .615 lift), Isky hydraulic roller lifters, Comp 1.7 stainless rockers. Built for a family cruiser that should get up and move when needed. Made a best of 648hp@6000 and 632tq@4700... with a power band flat as a pancake... hitting just over 600hp@5000 rpm. Will idle at 800-850ish, which is very nice for I/O applications... but still making decent power for a jet boat friendly application.
Totally awesome guy to deal with! Best experience when my hard earned cash was on the line. Defiantly would recommend and will be going back for my pump work!
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Wow that's a kick ass motor for sure
Sent from my SCH-I545 using SoCal Jet Boats mobile app
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Sounds like a stout mill for the family cruiser... :thumbup:
What impeller are you going with?
Dan'l
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Hmmm well i didnt win a Bostick racing coozie, i guessed it would make alittle over 700hp. He also bulit my 496 and my pump,great guy and will not hesitate to recommend him to others.
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When do we get to see it?
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Here she is going together.
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Should be ready for a lake test next week.just got plumbing and exhaust to do.(waiting on parts).
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Few more items to button up.hoping lake test tomorrow .. 8)
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Freaking sweet if you don't mind me asking how much for the engine complete?
Sent from my SCH-I545 using SoCal Jet Boats mobile app
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As of right now I'm in over $10... Not including the cmi headers,msd ign, roller lifters, roller rockers,billet timing cover,valve covers,starter,holley hp pump,and spark arrester.(these all came from another motor I had). I'd guess it to be around $15... All said and done. :P
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Got it .she sure looks sweet I hope it pulls as good as it looks
Sent from my SCH-I545 using SoCal Jet Boats mobile app
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Yeah...me too! ;D