Chevy Crate Motor
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 14 of 27

Thread:
Chevy Crate Motor

  1. #1
    Member
    Join Date
    Feb 2008
    Location
    Clovis
    Posts
    78

    Default Chevy Crate Motor

    Was wondering if someone with real know-how could explain to me why a chevy big block crate motor will not work in a marine application. The 572 720hp motor looks killer but engine builders in my area say it wont work and will blow up. Same with evey other crate motor, 502, 454, ect. Any info would help.

    Thansks

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

  4. #3
    Lurker
    Join Date
    Dec 2007
    Location
    NC
    Posts
    1,417

    Default

    They are nice pieces for a reasonable price.
    May be a tad tight clearance wise for marine use as shipped but many are using them with good success.

    Is that your's Outlaw??
    If so you should be a good source of info!

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Distinguished Member David 519's Avatar
    Join Date
    Jan 2008
    Location
    NorCal
    Posts
    5,754

    Default

    Everyone I know that's used one of the GM crate motors has been happy with it. I haven't done one in years, but the last couple I did, I took apart and checked everything out. Most issues were minor...
    With a lot of engine builders, whatever you have is junk and should be throw away. Whatever anyone else built is NFG and you will be lucky if it even runs. Anything your last engine builder told is wrong (this is can be true even if it's the same guy and some time has passed).
    All engines are compromises in some way... Ask lot's of questions, use a bit of common sense and make your mind up what's best for you...Good luck

  7. #5
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

    Default

    Quote Originally Posted by Warp Speed View Post
    They are nice pieces for a reasonable price.
    May be a tad tight clearance wise for marine use as shipped but many are using them with good success.

    Is that your's Outlaw??
    If so you should be a good source of info!
    no not mine Its off hi tech's web site

  8. #6
    steelcomp was here
    Join Date
    Dec 2007
    Location
    n/e TN
    Posts
    26,280

    Default

    Quote Originally Posted by David 519 View Post
    Everyone I know that's used one of the GM crate motors has been happy with it. I haven't done one in years, but the last couple I did, I took apart and checked everything out. Most issues were minor...
    With a lot of engine builders, whatever you have is junk and should be throw away. Whatever anyone else built is NFG and you will be lucky if it even runs. Anything your last engine builder told is wrong (this is can be true even if it's the same guy and some time has passed).
    All engines are compromises in some way... Ask lot's of questions, use a bit of common sense and make your mind up what's best for you...Good luck
    I frequent a few other website forums where there's a little higher level of racing participation, and I've heard plenty of horror stories about these and other crate engines. Mostly due to poor clearances/oil pressure issues, and power that's no where near advertized. My advice is, when ever you buy a crate engine, at least tear it apart and inspect it closely. All it will cost you is gaskets, and some time, but it may save you lots more in the long run. My guess on the marine issues is they're not built for marine use, so they're going to have all kinds of disclaimers.
    Just my .02 FWIW
    Last edited by scott foxwell; 03-29-2008 at 08:22 AM.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  9. #7
    Member JAY4SPEED's Avatar
    Join Date
    Dec 2007
    Posts
    41

    Default

    GM crate engines are not warrantied for marine use unless the specific model crate engine is designated for marine use by GM. So, you could drop 12K in a 572 and your on your own as far as warranty goes.

    Jay
    "You just can't fix stupid!"

  10. #8
    Senior Member VDRIVERACING's Avatar
    Join Date
    Jan 2008
    Location
    Atlantic Beach, FL
    Posts
    1,640

    Default

    Plenty of out of the box motors have gone in ski boats over the years. It would be a matter of application, IMHO. If you're going to run around, ski, a few blasts, probably fine. If you think you're gonna wring it out and beat the crap out of it, have your builder tear it apart and clean it up for a couple grand.

    No free lunches...

  11. #9
    Senior Member cyclone's Avatar
    Join Date
    Dec 2007
    Posts
    3,620

    Default

    ever single gm crate engine i've worked on and dyno'd was underrated by gm by about 20-30hp....

  12. #10
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    10,072

    Default

    The 502 dyno sheet that I posted on the other thread started life as a GM short block. I had ESI pull it a part and blue print it. As Warp stated the clearances are a bit tight for marine use. I know people have just droped them in a boat, but my friend wanted an engine that would last for year's with out any issue's. The blue-printing was money well spent.

    As Scott said ,I would have one torn down and checked out. I do have a friend that blew up their crate engine (502) 3 times last year. Chevy replaced it the first time, it blew again then Chevy tried to fix it for them twice blew each time. I told them after the first time to take it to an engine shop and blue print the damn thing. Some people have more money than brain's.

    Sleeper CP

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

  13. #11
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
    Join Date
    Dec 2007
    Location
    Newton Ks.
    Posts
    6,834

    Default

    Quote Originally Posted by Outlaw View Post
    Duane says that is one great jet boat motor, out of the box.

    Just has lousy results out of the Demon carbs on them. I think he has a whole closet full of them available CHEEP.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

  14. #12
    ... Some Kind Of Monster's Avatar
    Join Date
    Dec 2007
    Location
    East Side
    Posts
    2,056

    Default

    Quote Originally Posted by sangercat View Post
    Was wondering if someone with real know-how could explain to me why a chevy big block crate motor will not work in a marine application. The 572 720hp motor looks killer but engine builders in my area say it wont work and will blow up. Same with evey other crate motor, 502, 454, ect. Any info would help.

    Thansks
    The cause for concern is with the clearances because you are using cold lake water to cool the motor. I don't know the exact specs of this crate motor but a few other things to look at are the cam specs, brass freeze plugs and fittings, and a larger oil pan.

  15. #13
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

    Default

    Quote Originally Posted by SmokinLowriderSS View Post
    Duane says that is one great jet boat motor, out of the box.

    Just has lousy results out of the Demon carbs on them. I think he has a whole closet full of them available CHEEP.

    just what part # do they put on the 572? How cheap??? I need one for my
    68 El Camino

  16. #14
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
    Join Date
    Dec 2007
    Location
    Newton Ks.
    Posts
    6,834

    Default

    Quote Originally Posted by Outlaw View Post
    just what part # do they put on the 572? How cheap??? I need one for my
    68 El Camino
    Ask Duane http://hi-techperformance.com/1-417-856-8616
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95