The wiring is more complex and you need to use an ECM and the needed sensors. While Throttle body injection will start easier than a carb engine and run smoother cold, it will not necessarily produce more power than a well set up carb. There are electric conversions for the Q-Jet carb but you can also upgrade to the Edelbrock (if it will clear the Cobra shift linkage on the starboard side, I know it does not on the V6 models) or a Holley 4bbl, both come with electric chokes. You will need a Vortec intake manifold, and if you have a 4bbl Quadrajet, you will need to convert it to an electric choke because the Vortec style manifold does not use an exhaust crossover that was used to heat the thermostatic spring for the choke to open it as the engine warms up. IF I were to install vortec heads on my current engine, do i need a different intake manifold, or is it better to get different style of heads for this engine and use my current intake manifold.Īnd I fully take into consideration the advice that this endeavor could be a waste of time and money, but without more knowledge about the conversion process, I wont know if I feel its its a waste of MY time and MY money. I have all the skills and tools necessary, but I have had no experience with the vortec engine, so its information of the engine itself that I need. So with it not having the correct pistons, and because I have the skills and the time ,i wanted to buy an engine and do the rebuild in shop at my leisurely pace, as my current engine runs fine so there is no hurry and I do plan on having the boat for a long time. the engine is a custom rebuild, installed in 2011, but it does NOT have the preferred pistons in it. Im not sure of the hours on my current motor, but due to a glitch of my own doing, i had to replace one piston, and while i had it apart I replaced the rings on all pistons. I’m sure the cam has changed and everything would be marine specific because of the way the engine operates, constantly under load not having any “downhill” time. Now, with the true fi, it would be my preferred configuration. I’m not familiar with the newer versions, but the 01’s were roller cam and the only fuel injection then was throttle body injection so I considered it a why bother. Btw, the new ABYC standard for negative wire is yellow. Use tinned wire and marine shrink/glue connectors. It wasn’t plug and play, we built a new harness going from the pigtail to the dash, it was a matter of finding the right color, gauge wire and connectors. I did the installation myself and even though I was converting from a four cylinder to a v6, it wasn’t difficult. We sold the boat in 2017 after putting 1000 hours on them. My cruise speed increased and fuel burn decreased. I repowered our 1980 2950 Encounter Sunbridge in 2001 after one of the original 470’s cracked a block with new 205hp 4.3’s and counter rotating Alphas. If your plan is to keep the boat for a long time, you feel it’s a bit underpowered and you use the heck out of it, then it can make sense to do a total package. I would avoid buying any model which is unreasonably difficult to work on as a DIYer.Try thinking of it on a return on investment basis. Whenever I am considering purchasing a vehicle, I always look to see how difficult it is to do things such as replace the timing belt (if equipped), replace the accessory belt(s) and coolant hoses, drain and refill the coolant, change the transmission fluid and filter, replace the water pump, replace the radiator, change the spark plugs, etc. I wouldn’t even consider any model which has an internal water pump driven by a timing chain. I also require the engine to be non-interference if it uses a rubber timing belt, and the water pump must be mounted externally, and driven by the timing belt, or accessory belt. I am specifically looking for models that have a cable-operated throttle body and a radiator cap on the radiator itself, among other things. Why? I am currently looking to replace one of my vehicles, due to needing repairs that I don’t have time to do, and am not willing to pay shop prices to have done. and to be even more clear, I would choose a truck that had an electronic throttle body and a returnless fuel system.
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