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Your all gonna love this! I own a O540

Waterthunder

Waterthunder

Well-known member
I just picked up an O540 I'm gonna build it for my wife's boat. I'm bored and want something different to work on. It's been 8 or so years since I have owned or built an aircraft motor. I'm gonna put electronic fuel injection on it and get rid of the mags! It's a very light O540 version narrow deck parallel valve motor it's also a small journal! I'm sure I'm gonna be bugging all you A/C guy's for parts!
 
Have you seen chippers boat he has a straight valve 0540 with an automotive super charger. Runs pretty good too.
 
I have owned them in the past and to be honest my wife was a little too comfortable in her step boat. It's one thing to drive it but it's another to be a passenger in one and she loved to stretch it's leg's with me sitting on the bow! It was either a DD LS2 with fuel injection or this O540 and the deciding factor was I have a customer wanting me to build him a direct drive 440 cubic inch LS fuel injected! I love the potential of my fuel injection sytem and my neighbor has been wanting me to put one on a O540 for years so now I have a ginny pig!
 
Now I see who is that man of the house Thunder :D JK JK. What kind of prop will that dd ls motor be swinging?
 
Trust me I better get something running quick. She is not happy that I sold her step boat that boat was a very nice ridding boat! She get's angry with me when we are airboatless! I'm going to see about a Hammant or a Alumitech hull Wednesday!
 
Dave,

You're kiddin' us aint you!
Sure you aint' been drinkin' some of this...
11_18_2006_17.jpg

Man, that cuts deep! LOL!

Basketcase
 
AvGas = Aphrodesiac.....It's a known fact.

Hope you decide to make the EFI / 0540 system available....Please put me at the top of your list.
 
Thunder you've given a lot of useful information out on Car Motors. Hopefully this will continue with us Aircraft guys. :wink: Good luck on this project.
 
Sounds like a great project ! With electronic ignition, you could use one of the spark plug holes in each cylinder for the injectors. Talk about a clean, minimal lookin' engine ..... 8) .
 
The wife want's a car motor but I promised her I will make good power with this O-540! Well I already started mapping out my ignition/fuel managment! I wanted too verify that the Lycoming opposed cylinder motors fire evenly which after looking at the wire location on the mag they do! Four strokes fire in two rotations so thats 6 sparks over 720 deg of rotation or 3 sparks per 360deg of rotation! Or one spark every 120 degrees of crankshaft rotation! This means I must have one trigger every 120 degrees of crank rotation! If I use the same 60 tooth reluctor pattern as I do with our LS motors that comes to one spark every 20 teeth! Just think no more moving parts, points or rotors and a fully programmable fuel system and ignition! I think I will leave the motor together for testing before I tear it all apart and build it for the wife! I'm probably gonna send the Jug's to Jr. Junagan after I drill them for electronic injectors! Is there any other recommendations for O-540 jug work!
 
I did that along time ago with a stroker Continental I built for my old Gore hull! I just machined the pedestal's flat and found a set of drop in automotive rockers! I kicked the ratio way up too! I don't want to run into the same problem I did with my last A/C motor the jug's couldn't dissipate the heat it generated! This time it's all about snap and throttle response with out adding compression or cylinder pressure. I want this thing to run on 93 octane!
 
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