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454 rebuild with blower... Pistons and clearances.

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Old 01-24-2015 | 05:10 PM
  #151  
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Originally Posted by mike tkach
joe,since you offered to help i am going to hold you to it,we may even have a few beers when we are done.
You phuckers make me jealous .
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Old 01-24-2015 | 05:24 PM
  #152  
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Originally Posted by the deep
You phuckers make me jealous .
x2!!
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Old 01-24-2015 | 05:25 PM
  #153  
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Holy sh!t... 16 pages of responses from the thread that I started! I need to catch up on my reading!
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Old 01-24-2015 | 07:02 PM
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tom,you may want to skip some of it.lol.
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Old 01-24-2015 | 10:19 PM
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Originally Posted by mike tkach
tom,you may want to skip some of it.lol.
I've noticed. Glad everything seems to worked out amongst everyone!
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Old 01-24-2015 | 10:24 PM
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From: dfw texas
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Ill try the summary , flog me as you see fit . On toms motor the 8-71 or 420 will make more power with less inlet temp , and resulting detonation potential .
If the day comes he decides to throw down for raised port brodix or afrs a $1.3k cam and lifters set ,4k in exhaust maybe some premium h beams and carillo crank the blower wont hold himback .
Dyno readings are not consistant from one to another
even with perfect planet alignment and and a optomistic dyno and gold plated dry headers 690 out of a 250 charged 454 headed for a boat is respectable
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Old 01-24-2015 | 10:29 PM
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From: dfw texas
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But maybe tom doesnt have the room for a full size huffer either height or front wise , doesnt want to fiddle with double keyway cuts and or balancer deletes , may have a real bond with his existing outdrive also and doesnt want to launch the upper gears right through his swim platform while onlookers gasp.
but hes got this shiny 250 and knows he can make his 242 faster than it is now ..
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Old 01-24-2015 | 10:33 PM
  #158  
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Originally Posted by airjunky
Tom , where you at with your short block ? I have to make sure i beat you to what may be one of the last spined 3.00 pulleys . Going to squeeze it all under the hatch of a 22 so low profile it is , after pulling 1" out of the bottom of the eng hatch.
I don't think I'll be spinning a 3.00 pulley, though who knows, right?

I'm trying to get my piston issue worked out. Actually, I'm juggling a lot of things right now, biggest being that my 5 year old daughter has had the flu something terrible! A week and a half later and she's just starting to really turn the corner toward recovery. Thankful that I've kept the other kids semi-isolated. So far so good, but I digress. My short block was in much better shape than I thought. Polish of the crank, honing of the bores, and a good cleaning was all that was needed. I had one piston that was hurt, and another three that I made the call on of being marginal (and they're out). I don't want to screw with the balance, and since everything else was good, just replacing the bad pistons..I'm sourcing a lot of stuff right now... rings, bearings, valves, springs and retainers, etc. It's all kind of grown out of control compared to the plan previous to me buying the B&M, not to mention all the stuff that the boat needs post transom and stringer rebuild. A couple of times I've thought of putting my 10-sec small block S10 up for sale to get the boat in the water (not happening). Just going to take it all slow, build it right, dyno tune the setup, and get the boat back together. If she's back in the water this summer, then good. If not, I'll be on the Cigarette for the summer (OSO member Hollowpoint.... his Bullet) not to mention that I've been boat-less since late summer of 2012 because of rot issues... waiting isn't that bad!

Crazy that this thread blew up like it did!

Last edited by TomZ; 01-24-2015 at 10:37 PM. Reason: Clarity
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Old 01-24-2015 | 10:46 PM
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From: dfw texas
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Im not going to lie , there was a moment where i was thinking of what i could sell to get a 8-71 for the 540 thats prob going to end up in one of my jet boats . At least for a few weekends or more .the rotating assy good for 800hp and a overdriven 8-71 wont have me worried about the front of the crank breaking off or ganking the keyway.
but then theirs these 2 teenagers im feeding prop tax bills nsx is gonna need a 2000$ clutch blah blah
so i am tuned to the flat top 7.4 with a 250 channel once again for this seasons personal forced induction fix
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Old 01-24-2015 | 10:47 PM
  #160  
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Originally Posted by airjunky
But maybe tom doesnt have the room for a full size huffer either height or front wise , doesnt want to fiddle with double keyway cuts and or balancer deletes , may have a real bond with his existing outdrive also and doesnt want to launch the upper gears right through his swim platform while onlookers gasp.
but hes got this shiny 250 and knows he can make his 242 faster than it is now ..
The 250 is about what I have room-wise before having to cut a hole in the hatch (the girlfriend has already said this is a no-no... my boat but I enjoy having my girlfriend and her friends sprawled out on the sunpad so.... I've thought about trading up for a 420, but like I said, the 250 is about tops space-wise.

I'm already using huge by freaking huge heads (not getting into that debate at this time but they are done up well), and the bottom end will be sound for what we're doing. All good things. If my 242 hits high 70's/80 I'll be more than pleased. It takes around 525 HP to get there... I'll be at least a hundred HP over that, and I think I can do it pretty reliably. And if The relaibility goes out the window, I'll build another one.

Last edited by TomZ; 01-24-2015 at 10:50 PM.
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