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  • Deaf Bob
    replied
    It'll fit... No doubt! Lol. I hope. ...

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  • 68scott385
    replied
    I was able to run the 455 for 20 - 30 minutes without it overheating today. New water pump, 160* thermostat, 4-core radiator, and I used a house fan once it got to 210*. The house fan dropped the temp 10* for a few minutes before it climbed back to 210*. The system pressure never got over 7psi until I shut the motor off, then it only went to 10/11psi. I put 3.5 gallons of water in the thing before starting it and another half gallon when the thermostat opened. All this on water, no antifreeze whatsoever. I'm thinking that with 50% coolant the temp should be maybe 10* cooler and overall, with a mechanical fan & shroud instead of the 16" electric on the stand, and limited stop-light driving, I might be able to make this live in the wagon, if it'll fit.

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  • 68scott385
    replied
    Thanks.

    I still need to get the new radiator hooked up and try again to keep it cool on the stand. If I am successful in that I think I'm going to drop it in the car as it is, plus an oil change.

    It's got a new water pump and lower temp thermostat already installed but somehow other priorities keep popping up.
    Last edited by 68scott385; August 18, 2013, 09:55 AM.

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  • Beagle
    replied
    good noise!
    Last edited by Beagle; August 18, 2013, 07:32 AM.

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  • 68scott385
    replied

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  • 68scott385
    replied
    THIS THREAD MIGHT PROLLY SHOULD OUGHTA BE MOVED TO THE PROJECT SECTION?

    I ran the motor again. Took a hot compression test, numbers [email protected], [email protected] Then I did a leak-down test, 12%-20% leak-down, so it's got some age on it, she still runs better than the motor in the car, RIP. [email protected]%, [email protected]%, [email protected]%, [email protected]% no two are adjacent. This time (running) I put a coolant system pressure tester on the radiator to check the running pressure of the engines cooling system, it never got over 10psi but I couldn't keep the temperature controlled either. That was using a 3-core stock radiator, the water pump that came with the motor, a 180* thermostat, and 12v electric fan with better airflow than the one that keeps my 385 cool.

    I have since removed the thermostat and check its operation and while it works fine I am going to replace it with a high flow 160* unit. I got a new, heavy load water pump, and a 4-core radiator. I plan to back flush the block as best I can before running the motor again. Other things keep taking priority.

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  • 68scott385
    replied
    What is a good leak-down percentage? I'm searching/researching that answer on my own but wouldn't mind (would actually like) comments from this group.
    Last edited by 68scott385; August 3, 2013, 06:49 PM.

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  • 68scott385
    replied
    Attached Files
    Last edited by 68scott385; May 29, 2014, 10:06 PM.

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  • 68scott385
    replied
    Attached Files
    Last edited by 68scott385; May 29, 2014, 09:58 PM.

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  • Beagle
    replied
    Originally posted by 68scott385 View Post
    ... well, doesn't everyone have three of those sitting around with nothing to do?
    yeah, and I'm a Ford guy...

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  • 68scott385
    replied
    FWIW and to plug the transmission builder...

    http://www.bilbreyracing.com/

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  • 68scott385
    replied
    Well Spidey, you asked for it so here it goes.

    I needed a family hauler, not some cookie-cutter mini-van, micro-bus, cross-over crap that everyone runs around in. I found an '88 Caprice wagon in real good shape, at least the body is. For some reason, probably more to do with supply depletion than anything else, GM chose to use the 307 Olds motor in these cars. The 307 Olds was put in most other large B-body platforms of the day except the Caprice coupes & sedans.

    Not really wanting a hot rod look or feel from the car I thought it would be subtle to put a 455 in place of the 307 since most on-lookers don't know the difference anyway and if it winds up be a sleepy looking wagon with a surprise, so be it.

    When I started this thread I was looking for a motor to replace the 307. At the time I was willing to take almost anything that would be usable and better than a 307 Olds. After three or four months of patiently watching eBay and lurking the local wrecking yards I found what I was looking for, "a rebuildable, and relatively unmolested, Oldsmobile motor."

    I had hoped that the engine and transmission would both last for a year or two so I could have time to get decent replacements for them. I found a warmed up Grand National transmission that the builder wasn't fully compensated for his efforts and the customer needed to unload. The builder is going to warranty the transmission and says it is built to hold 600hp. That's equivalent to a "level 3" from BowTie Overdrives with a price I couldn't pass up.

    There has been unforeseen pitfalls along the way and in the quest to have a dependable driver have put off building an engine as long as possible. Yes it would be cheaper to throw a small block Chevy at it because, well, doesn't everyone have three of those sitting around with nothing to do? I just thought it would be something different that than expected.

    So here I am a year later and the 307 has given up the ghost and the 455 will get a lot of attention in the coming week or two.

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  • 68scott385
    replied
    This is from a Marlan Davis article in the March 1986 Hot Rod page 54.



    Most of the article in readable form...

    http://highperformanceolds.com/phpbb....php?f=23&t=19
    Attached Files
    Last edited by 68scott385; May 29, 2014, 09:54 PM.

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  • 68scott385
    replied
    Originally posted by Deaf Bob View Post
    Simply, Olds small/big blocks do not exist..it is all one physical size..
    Not true. The Olds big block is 1" taller and 1.5" wider than a small block. I'll cite my source tomorrow but I think Marlan Davis tech article, maybe even post a pic. Bill Travato said in his book that the heads are interchangeable inasmuch that if you have a sbo and want better breathing heads just bolt on some bbo heads and there you go. After tonight's fiasco(s), and winning the lottery, I might try that someday.

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  • Deaf Bob
    replied
    Simply, Olds small/big blocks do not exist..it is all one physical size.. Internally...different..
    Badge it as a 350.. Only those who know to look under the head at the driver side front cylinder on the block will see it's true size..

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