SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: younggun on August 22, 2017, 08:19:11 AM
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Hey all, as you can tell from my username I am new to the game. Picked up a freshly rebuilt 454 and am in the process of getting it ready to drop into my Spectra 19. It was built for a camaro but I am in the process of converting it for my boat. So far I know that I need the following:
- logs & snails
- motor mounts
- 4 point bell housing
- low mount alternator bracket
- water pump block off plates
- water hoses
Also its not a must yet but eventually a MSD distributor and ignition system.
In the research I've done I believe it is a Gen IV 454 that came out of a truck? The Block number is 14015445 and the heads are 353049.
I know I have a lot of work ahead of me but if anyone has advice, tips, suggestions, or even parts I can buy anything would help.
Thanks!
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A word of caution, if that BBC engine was originally built for automotive use I personally wouldn’t install it in your jet boat. For a marine application certain internal engine clearances need to be slightly larger. Depending on the material of the pistons, cylinder wall clearance needs to be larger, I like to see an additional .001” for main and rod oil clearance, along with an additional .002-.004” for the thrust. Valve stem to guide clearance is another very important clearance that needs to be set correctly. All in all, for a marine application with an open cooling system you need to allow for certain internal components to grow due to thermal expansion while the external foundation meaning block & heads will not grow due to low temperatures. In addition, do you even know what is in that engine, and how it's set up?, example, compression ratio, cam spec's ect, ect. Plus that oil pan won’t fly, you need a marine pan like something from Dooley and a windage tray is a big plus. This may seem like a lot to digest, but looking at the big picture, if you decide to install it as is and score the cylinder walls or stick a valve in it’s guide and the piston hit’s it, these issues could be the demise of your engine really quick, do it once and do it right, you will be better off in the long run saving time and money.
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Get a good mechanical fuel pump and good fuel filters. Look into a starter from an LA Vette. I believe 99-2001 fits. Google it. Much lighter than stock. Match carb to your cam. Use a good carb shop. These are things I had to learn the hardway. I ran an HEI on a very mild BBC and it ran good. DO NOT BUY PRO COMP PARTS! Be safe. Take your time learning how your boat runs and feels..... AND USE ONLY SCJB.COM
Sent from my SM-G930T using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)
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A word of caution, if that BBC engine was originally built for automotive use I personally wouldn’t install it in your jet boat. For a marine application certain internal engine clearances need to be slightly larger. Depending on the material of the pistons, cylinder wall clearance needs to be larger, I like to see an additional .001” for main and rod oil clearance, along with an additional .002-.004” for the thrust. Valve stem to guide clearance is another very important clearance that needs to be set correctly. All in all, for a marine application with an open cooling system you need to allow for certain internal components to grow due to thermal expansion while the external foundation meaning block & heads will not grow due to low temperatures. In addition, do you even know what is in that engine, and how it's set up?, example, compression ratio, cam spec's ect, ect. Plus that oil pan won’t fly, you need a marine pan like something from Dooley and a windage tray is a big plus. This may seem like a lot to digest, but looking at the big picture, if you decide to install it as is and score the cylinder walls or stick a valve in it’s guide and the piston hit’s it, these issues could be the demise of your engine really quick, do it once and do it right, you will be better off in the long run saving time and money.
So, If I put in a New ZZ5/6, It won't work?
I'm looking at Mark Christopher Chevrolet.
Dan'l