Originally posted by Scott Danforth
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without pulling it apart, its a guess
could be valve train, could be broken piston, could be bearings.
either way, your motor is coming out.Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
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Originally posted by Scott Danforth View Postwithout pulling it apart, its a guess
could be valve train, could be broken piston, could be bearings.
either way, your motor is coming out.
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You can build a brand new stroker motor for $4200. However its your money
Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
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Originally posted by Scott Danforth View PostYou can build a brand new stroker motor for $4200. However its your moneyLast edited by cowlotter; October 9th, 2019, 02:25 PM.
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starting from scratch and buying new parts, a 5.7 and 6.2 are the exact same cost. the dimensions of the engines are the exact same.
your dealing with a small block chevy with OMC stuff bolted to it. your replacement motor will be a SBC with your existing OMC stuff bolted to it.
not sure by what you mean brand..... because the brand is General Motors, and you are dealing with the corporate marine motor which is a SBC.
the 315 hp is the flywheel hp for a 260hp motor/drive package
going to a vortec motor is vortec heads and a roller crank.
reliability is purely a function of maintenance.Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
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Originally posted by Scott Danforth View Poststarting from scratch and buying new parts, a 5.7 and 6.2 are the exact same cost. the dimensions of the engines are the exact same.
your dealing with a small block chevy with OMC stuff bolted to it. your replacement motor will be a SBC with your existing OMC stuff bolted to it.
not sure by what you mean brand..... because the brand is General Motors, and you are dealing with the corporate marine motor which is a SBC.
the 315 hp is the flywheel hp for a 260hp motor/drive package
going to a vortec motor is vortec heads and a roller crank.
reliability is purely a function of maintenance.
1 - https://www.ebay.com/itm/Reman-6-2L-...OIAAOSwqVBZZNY D
2 - https://www.ebay.com/itm/383CI-Strok...kAAOSwrXVde5pY
3 - https://www.ebay.com/itm/ATK-Chevy-3...wAAOSwKt5ZlxGq
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No, I would buy a brand new virgin block and build a 377. a 383 is a 0.030" overbore in addition to the 3.75" stroke crank
read this (in its entirety) https://forums.iboats.com/forum/engi...-a-383-stroker
there are GMPP links, etc.
a new 377 is $4200, a reman stroker from someone not price-gouging would be about $3k talk to your local machine shop
I built my 468 for less than $3kCheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
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Originally posted by Scott Danforth View PostNo, I would buy a brand new virgin block and build a 377. a 383 is a 0.030" overbore in addition to the 3.75" stroke crank
read this (in its entirety) https://forums.iboats.com/forum/engi...-a-383-stroker
there are GMPP links, etc.
a new 377 is $4200, a reman stroker from someone not price-gouging would be about $3k talk to your local machine shop
I built my 468 for less than $3k
http://vi.vipr.ebaydesc.com/ws/eBayI...rsion=d04531b9Last edited by cowlotter; October 9th, 2019, 03:52 PM.
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yes, vortec heads have different bolt pattern for the intake
vortec blocks (unless you go GMPP block) do not have a mechanical fuel pump pad that is machined
your exhaust manifolds will bolt to any SBC (from 1954 to today)
600 CFM is a bit small for a strokerCheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
Comment
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Originally posted by Scott Danforth View Postyes, vortec heads have different bolt pattern for the intake
vortec blocks (unless you go GMPP block) do not have a mechanical fuel pump pad that is machined
your exhaust manifolds will bolt to any SBC (from 1954 to today)
600 CFM is a bit small for a stroker
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keep it a 5.7 and your 600 CFM would be fineCheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W
1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420
Past Boats
1970 Wooster Hellion - Merc 9.8
2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
1984 Avanti 170DLI -3.0 stringer- "Ship Happens"
What’s behind you doesn’t matter. – Enzo Ferrari
Comment
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Originally posted by Scott Danforth View Postkeep it a 5.7 and your 600 CFM would be fineLast edited by cowlotter; October 9th, 2019, 04:59 PM.
Comment
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Originally posted by Scott Danforth View Postwithout pulling it apart, its a guess
could be valve train, could be broken piston, could be bearings.
either way, your motor is coming out.
Comment
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