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It's unfortunate as 2 strokes do have their merits, but the emissions were just a tough obstacle. The ficht/etec was trying to use direct injection to get around the emissions issues along with a different oiling system. Was actually a decent idea. The big problem with direct injected 2 strokes is the fuel has to be spray on the upstroke vs a 4 stroke can be sprayed as the piston is going down, which gives it more time to atomize. The only issue with direct injection on a 4 stroke is deposits on the intake valves, but automotive OEM's are finally starting to figure out that a hybrid system of direct injection and port injection is the best route to go as to help keep the deposits down with the fuel going by the valve.
I would be curious to know if anyone ever evaluated a valved 2 stroke with a variable geometry turbo, and a wet crankcase and a hybrid direct/port injection fuel setup? I could be way out in left field, but seems like that could have been a cool package with today's electronics/ecu capabilities....... I guess my dad always told me, there are 3 types of people...... Those who think inside of the box, those who think outside of the box, and those who ask what box? |
Originally Posted by Coolerman
(Post 4741671)
It's unfortunate as 2 strokes do have their merits, but the emissions were just a tough obstacle. The ficht/etec was trying to use direct injection to get around the emissions issues along with a different oiling system. Was actually a decent idea. The big problem with direct injected 2 strokes is the fuel has to be spray on the upstroke vs a 4 stroke can be sprayed as the piston is going down, which gives it more time to atomize. The only issue with direct injection on a 4 stroke is deposits on the intake valves, but automotive OEM's are finally starting to figure out that a hybrid system of direct injection and port injection is the best route to go as to help keep the deposits down with the fuel going by the valve.
I would be curious to know if anyone ever evaluated a valved 2 stroke with a variable geometry turbo, and a wet crankcase and a hybrid direct/port injection fuel setup? I could be way out in left field, but seems like that could have been a cool package with today's electronics/ecu capabilities....... I guess my dad always told me, there are 3 types of people...... Those who think inside of the box, those who think outside of the box, and those who ask what box? Why deposits on the intake valve? And GM has released a DI SC marine motor now. Expensive but when merc is selling $58K 450HP OB's I guess what the heck. https://marineenginedepot.com/new-62...-airpac-620-hp |
Originally Posted by Wildman_grafix
(Post 4741678)
I forget who is was but I believe it was in the motorcycle world where they tried the wet crankcase, valved 2 stroke. But That may have been late 80's early nineties when 2 strokes were going away from the motorcycle sport bikes. BIMOTA maybe?
Why deposits on the intake valve? And GM has released a DI SC marine motor now. Expensive but when merc is selling $58K 450HP OB's I guess what the heck. https://marineenginedepot.com/new-62...-airpac-620-hp |
Originally Posted by hogie roll
(Post 4741690)
Now that’s news! But double the cost of a non marinized version, ouch.
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The weird thing they are working on new engine technologies “such as the next generation of engine technology with Project Ghost”.
You would assume that includes outboards so why get rid of the brand now. They have not a bad 4 stroke engine in under their umbrella with the Sea Doo engines. Surprised they haven’t engineered one of those for an outboard application. |
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