Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Results 1 to 9 of 9
  1. #1
    Registered
    My Boats:
    1990 Baja 250 ES
    Join Date
    Jan 2011
    Location
    Irmo, SC
    Posts
    15

    415HP 454 Build Question

    Im new to the performance boating world and my first project is a 1990 Baja 250 ES. The previous owner claimed he did a mild build to it and says it has 415HP. I was wondering what I should look for that would indicate this. The block casting # is 1401544. The heads are 3933148(Open 2V/427 265 122.1cc) It also has roller setup. Like I said, im a newbie and right now i just really want to know what I have so I can go from here. Oh yeah, and its running Thunderbolt IV ignition.

  2. #2
    Registered
    My Boats:
    1994 Baja 236 500HP
    Join Date
    Oct 2005
    Location
    Millstadt, IL and LOTO 3mm
    Posts
    1,766
    Quote Originally Posted by Leprican28 View Post
    Im new to the performance boating world and my first project is a 1990 Baja 250 ES. The previous owner claimed he did a mild build to it and says it has 415HP. I was wondering what I should look for that would indicate this. The block casting # is 1401544. The heads are 3933148(Open 2V/427 265 122.1cc) It also has roller setup. Like I said, im a newbie and right now i just really want to know what I have so I can go from here. Oh yeah, and its running Thunderbolt IV ignition.
    Here are the head specs from Mortec 3933148....69-84...oval...OPEN...'69 396/265hp, 366T, 427T, 112cc chamber
    Those should be the large ovals, but there is more to it than that. You must be missing a number on your block 14015445...454.......78-90...2 or 4 bolt
    What cam, exhaust, carb, pistons do you have? With a roller cam you can easily get 450hp with good exhaust.

  3. #3
    Registered
    My Boats:
    1990 Baja 250 ES
    Join Date
    Jan 2011
    Location
    Irmo, SC
    Posts
    15
    Factory wet exhaust. Throttle body injection with thunderbolt ignition. I'm in the process now of tearing it down some more. 14015445 block

  4. #4
    Registered
    My Boats:
    1994 Baja 236 500HP
    Join Date
    Oct 2005
    Location
    Millstadt, IL and LOTO 3mm
    Posts
    1,766
    Quote Originally Posted by Leprican28 View Post
    Factory wet exhaust. Throttle body injection with thunderbolt ignition. I'm in the process now of tearing it down some more. 14015445 block
    Fuel injection ? Aftermarket ? Good luck on your tear down.

  5. #5
    Registered
    My Boats:
    1987 Formula 242, 1989 Formula 292 SR1
    Join Date
    May 2009
    Location
    Evanston, IL
    Posts
    2,041
    If your boat is using the stock fuel injection don't attempt to modify anything. You will open a can of worms that you will later regret opening. The computer is set-up to run with very specific components. Change one thing and everything is off.

  6. #6
    Registered
    Join Date
    Jun 2011
    Posts
    197

    Endevor your right

    I have to side with Endevor on this. Especailly the cam. There is certain time frame on your the pulse width on the firing of your injectors. The Cam has to be calibrated for the proper opening and closing of the intake and exhaust to the proper timming of the injectors.
    You slap a cam in this that is not matched to the fuel system and your going to have one doggy ass motor or a motor that won't run at all.

    If you want to freshin it up tear it down and check all the part numbers for your cam pistons etc and call some marine engine guys and check all the componets that you have. If it runs good with the set up then stick with it just freshin it up with the same componets that you have. Just go new.

    Also make sure if there old castings on the heads that you have harden seats on the valves if you have the original seats on the heads they were built for leaded fuel. The no lead fuel will littlerly pound out the seats and turn the valves into somthing that looks like a mushroom. If your not sure have a reputable maching shop install new stainless valves and harden valve seats. And while your ad it have new valve guides installed.

  7. #7
    Registered
    My Boats:
    1990 Baja 250 ES
    Join Date
    Jan 2011
    Location
    Irmo, SC
    Posts
    15
    Thanks for the help guys! The wifey has me doing home projects this weekend but i plan on pulling the motor all the way out next week sometime. I did look into it a little further last night and actually is does NOT have a roller cam and it has been bored .030 over with flat top pistons. Hopefully next weekend i will be able to post some more specifics on the cam, pistons, crank, etc.

  8. #8
    Registered
    Join Date
    Jun 2011
    Posts
    197
    Sweet sounds like sombody dropped some cha ching in the motor. Good for you!

  9. #9
    Registered
    My Boats:
    1990 Baja 250 ES
    Join Date
    Jan 2011
    Location
    Irmo, SC
    Posts
    15
    Started new thread

    454 Project Questions


Posting Permissions

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


OSO Directory
All times are GMT -5. The time now is 02:01 AM.
Powered by vBulletin® Version 4.2.0
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.