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Technical 4 cylinder mercruiser-engined cars

Discussion in 'The Hokey Ass Message Board' started by dennis g, Oct 9, 2015.

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  1. David Chandler
    Joined: Jan 27, 2007
    Posts: 1,101

    David Chandler
    Member

    A 151 S10 engine might be an option. I considered it, as I owned one for quite some time. Cross flow head, roller cam. The TBI intake I think could be easily adapted to a carburetor; as there is a lot of room under the injector, where the EGR get's dumped into a troth around the riser. It's also a water heated intake. I was told an early Monza distributor would swap to eliminate the computer controls. At one time a recall seeing adapters to mount to a turbo 350 trans. I assume they used a BOP bellhousing pattern, but I could be wrong. A Fiero high volume oil pump fits too. They had a rear sump pan as well. I considered swapping the crank for a longer stroke too. I was told it could be done, and I was told it couldn't be done. Take your pick! I don't recall the valve sizes, but it's probably possible to install bigger valves too. The only thing I noticed was the head casting looked as if the material didn't flow properly, on a similar one I had in a Buick. But it was not in a load bearing area, and it worked without a problem. I would think pistons, other than the stock dished ones could be found too. They had a 4 inch bore, if I remember right. The truck had an automatic with OD, although I don't know which one they used, but with 373 gears it was no slouch.
    Food for thought, if you can get one for next to nothing.
     
  2. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    Here are 3 cam profiles that Erson worked out for me several years ago. # 1 is the mildest and # 3 is the one I got. Probably #1 is the best street cam. Note that these are based on a 1.70 rocker ratio instead of the stock 1.75. I'm using big block roller rockers because I had some. I don't know how much difference the 0.05 would make.
    100_1910.jpg 100_1909.jpg 100_1908.jpg
     
    Last edited: Oct 20, 2019
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  3. sdluck
    Joined: Sep 19, 2006
    Posts: 2,524

    sdluck
    Member

    2.85x1.75=490 lift
     
  4. 34Phil
    Joined: Sep 12, 2016
    Posts: 226

    34Phil

  5. Marty Strode
    Joined: Apr 28, 2011
    Posts: 5,143

    Marty Strode
    Member

    Clifford intake. IMG_1761.JPG IMG_1762.JPG IMG_1763.JPG
     
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  6. 1932tub
    Joined: May 31, 2005
    Posts: 396

    1932tub
    Member

    Thanks all for the camshaft info, really enjoying this thread.
     
  7. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    Last edited: Oct 20, 2019
  8. gearheadbill
    Joined: Oct 11, 2002
    Posts: 1,305

    gearheadbill
    Member

    This question may have been asked/answered before, but my 153/181head OMC engine does not have a vibration damper on the crank. Is this common on boats? and what should one do for a street car, if anything? 20160919_105927_resized_1.jpg 20160919_105940_resized_1.jpg 20160919_110003_resized_1.jpg 20160919_110018_resized_1.jpg 20160919_110522_resized_1.jpg
     
  9. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    The 153 had no dampener on the crank when a Chevy II, not sure about boat engines. The 181 has a dampener like a small block or six.
     
  10. willymakeit
    Joined: Apr 13, 2009
    Posts: 1,326

    willymakeit
    Member

    I just got one of these given to me. Said number 2 cylinder was low on compression but otherwise good.
    Price was right for something I’m piddling with
     
  11. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    Been "piddling" with mine for years now. I'll get it together some day.
     
  12. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    I've started on my build again. Two friends are helping he get my '26 Chevy roadster together. I'm hauling it down to one of their shops and we will work on it there. I'm going back through these threads to get my head back around the engine stuff.
    I saw the earlier post about cast and forged cranks. It is probable that early 153s had forged cranks with fewer or smaller counter weights. I know this was the case on early 292 sixes. The early one had forged cranks with fewer weights. The later one were cast but had a full set of weights. Most prefer the weighted later cranks. I don't know if this carries ove to the 153.
     
  13. jalopy45
    Joined: Nov 5, 2005
    Posts: 527

    jalopy45
    Member

  14. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    Interesting for sure. Could something like that be streetable?
     
  15. justabeater37
    Joined: Jan 1, 2009
    Posts: 1,281

    justabeater37
    Member

    Every thing is streetable. Tractable may be another story. EFI conversion fodder maybe?
     
  16. ray-jay
    Joined: Feb 23, 2008
    Posts: 200

    ray-jay
    Member
    from Buford GA

    I have a measurement request. I need to know the diameter of the machined portion of the distributor body. The section that slides down into the block. I'm thinking of using an early 151 [ non crossflow ]/153/181 distributor in another motor and before buying one I need to see if the GM dist is close enough to turn down to fit the new motor. Thanks !!
     
  17. red roadster
    Joined: Aug 16, 2010
    Posts: 21

    red roadster
    Member

    Hi Charlie, I have heard the 181 cam has larger journals than the CHEVY 2. Is this true?
     
  18. I will have to pass on that question. I don't remember hearing that but it has been too many years. How about calling someone like ISKY and asking if the same cam fits both engines?

    Charlie Stephens
     
    Last edited: Nov 18, 2019
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  19. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    No, Cams are the same size. Even the 151 will fit but the valves are in a different order. The 153 rod pins are 2.0 and the 181 are 2.1. Same bearings as the small blocks and L6s. Except for the 292 the sixes and 153 use the same rods. The 181 is the same but for the 2.1 big end. I believe they are the same forging as the small blocks but the V8 rods are machined one one side so they can share a crank pin. If you could get them before that cut was made I think all small block rods would work here.
     
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  20. Fast411
    Joined: Sep 2, 2010
    Posts: 19

    Fast411
    Member
    from Montana

    The South Americans seem to have a ton of aftermarket parts for the 153 GM engine. Saw a video on youtube recently with an 800hp 153 running on menthanol efi and turbocharged.
     

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  21. bcool2u
    Joined: Sep 12, 2009
    Posts: 4

    bcool2u
    Member
    from NJ

    IMG_2494.JPG IMG_2430.JPG I stumbled on this thread and thought I would post this 28 Ford Roadster I have. The project started in the early 70s in Portland Oregon and has never been completed. The chassis was built by Russ Meeks (RM Engineering) Unique for that era were midget style front and rear disks and rack; modified 4-bar front and rear; Spax coil overs and Borrani knock off wheels. It has a 120HP Mercruiser motor.
     
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  22. Six Ball
    Joined: Oct 8, 2007
    Posts: 3,509

    Six Ball
    Member
    from Nevada

    I'd like to see more and I like to see it finished. :)
     
  23. 1-SHOT
    Joined: Sep 23, 2014
    Posts: 1,909

    1-SHOT
    ALLIANCE MEMBER

    This is what a real Bird Nest looks like C18E4C26-3E0B-4D39-9266-734E423F4058.jpeg 4E36F693-E831-47C2-8268-22DEBE56C814.jpeg
     

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