Twin dio possible?
Posted: Wed Feb 15, 2012 1:36 pm
I don't know if it would be possible but I would have separate reeds and a custom intake that came together at a junction just before the carb.
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Majourlittle wrote:Alright, the idea of doing this would require the use of two engines. We will call the left cylinder motor "complete" and the right side "block"
The complete motor would be exactly that. A standard modified dio engine. The block would be a simmilar engine, but with the gearbox cut off so that it was an engine block, in the traditional sense of the word.
Basic idea would be to make a mating plate set that would be welded and reinforced on the mag sided of the complete engine and the variator side of the block engine. This would allow for the two engines to be bolted together so that the shafts lined up. This would allow for both cranks to be supported by two bearings each and would only serve as a way to access the crankshaft coupler. Usually the center pieces are a new custom machining. I see no need to screw around with the outside of each engine half (the variator side and the flywheel side).
Current plan would be to make an intake manifold that would attach one OKO carb to a y-tube that would feed both reid ports. Custom reid holders would have to be made. Just use the lower part of a CT intake for each half. The individual intakes tubes need to be equal in length from the "Y".
Either make the tdc 180* from each other and attach a mag to each crankshaft, or put them 0* from each other and feed only mag. Currently, 180* seems more to my liking, but has its own set of problems. It would allow for a smaller carb selection vs running them 0*. Why not just add a second pulse generator and CDI box for the 180┬░ cylinder. You could use the original stator for both boxes.
I am sure that there is quite a lot of logic missing in my initial assessment. I will investigate further in the next few days.
Bear45-70 wrote:Majourlittle wrote:Alright, the idea of doing this would require the use of two engines. We will call the left cylinder motor "complete" and the right side "block"
The complete motor would be exactly that. A standard modified dio engine. The block would be a simmilar engine, but with the gearbox cut off so that it was an engine block, in the traditional sense of the word.
Basic idea would be to make a mating plate set that would be welded and reinforced on the mag sided of the complete engine and the variator side of the block engine. This would allow for the two engines to be bolted together so that the shafts lined up. This would allow for both cranks to be supported by two bearings each and would only serve as a way to access the crankshaft coupler. Usually the center pieces are a new custom machining. I see no need to * around with the outside of each engine half (the variator side and the flywheel side). I would be attempting the machined halfs, but instead of making a whole new pieces set, I will canabalize the existing case-halves and build some attachment bracketry. It would be incredibly simmilar to the example in the OP's post but a mix of machined parts tig welded together.
Current plan would be to make an intake manifold that would attach one OKO carb to a y-tube that would feed both reid ports. Custom reid holders would have to be made. Just use the lower part of a CT intake for each half. The individual intakes tubes need to be equal in length from the "Y".I want to take the slant out of the ct intakes so that it would fit a little better between the cyls. I know that the slant is there for smoother flow into the chamber, but its my first idea run. I think that a twin carb setup will be used for simplicity sake.
I assume that tuning can be done on each individual cylinder by unplugging the coil and pulling the Spark plug. Tune each cyl seperatly and then it should be good in unison. ???
Either make the tdc 180* from each other and attach a mag to each crankshaft, or put them 0* from each other and feed only mag. Currently, 180* seems more to my liking, but has its own set of problems. It would allow for a smaller carb selection vs running them 0*. Why not just add a second pulse generator and CDI box for the 180┬░ cylinder. You could use the original stator for both boxes.I like this. Should be an easy splice.
I am sure that there is quite a lot of logic missing in my initial assessment. I will investigate further in the next few days.
Majourlittle wrote:Bear45-70 wrote:Majourlittle wrote:Alright, the idea of doing this would require the use of two engines. We will call the left cylinder motor "complete" and the right side "block"
The complete motor would be exactly that. A standard modified dio engine. The block would be a simmilar engine, but with the gearbox cut off so that it was an engine block, in the traditional sense of the word.
Basic idea would be to make a mating plate set that would be welded and reinforced on the mag sided of the complete engine and the variator side of the block engine. This would allow for the two engines to be bolted together so that the shafts lined up. This would allow for both cranks to be supported by two bearings each and would only serve as a way to access the crankshaft coupler. Usually the center pieces are a new custom machining. I see no need to * around with the outside of each engine half (the variator side and the flywheel side). I would be attempting the machined halfs, but instead of making a whole new pieces set, I will canabalize the existing case-halves and build some attachment bracketry. It would be incredibly simmilar to the example in the OP's post but a mix of machined parts tig welded together.
Current plan would be to make an intake manifold that would attach one OKO carb to a y-tube that would feed both reid ports. Custom reid holders would have to be made. Just use the lower part of a CT intake for each half. The individual intakes tubes need to be equal in length from the "Y".I want to take the slant out of the ct intakes so that it would fit a little better between the cyls. I know that the slant is there for smoother flow into the chamber, but its my first idea run. I think that a twin carb setup will be used for simplicity sake.
I assume that tuning can be done on each individual cylinder by unplugging the coil and pulling the Spark plug. Tune each cyl seperatly and then it should be good in unison. ??? The extreme angle on the carbs makes for * poor fuel control. If you do not run the second cylinder the tuning you do will be a waste of time. Both cylinders must be running or the air flow changes by half.
Either make the tdc 180* from each other and attach a mag to each crankshaft, or put them 0* from each other and feed only mag. Currently, 180* seems more to my liking, but has its own set of problems. It would allow for a smaller carb selection vs running them 0*. Why not just add a second pulse generator and CDI box for the 180┬░ cylinder. You could use the original stator for both boxes.I like this. Should be an easy splice.
I am sure that there is quite a lot of logic missing in my initial assessment. I will investigate further in the next few days.
Doing it with af05 blocks blocks would be a cheap test if you are only looking at a proof of concept. Screwing up af16's will be expensive.Majourlittle wrote:After typing it out, I realized that it was a stupid assumption.
I think that i will throw a few ideas around on paper and then come up with a mild prototype. Basically a set of stock engines to prove concept, then take it a little farther.
I think that a 180* phase is the way to go. Twin carbs and a single pipe will do. I also have a spare e frame that will serve as the mount for it all. Should be summer by the time i clear off my workbench to start up the grinder.