In terms of power do you get a straight up 75% of the 4 cylinder output (say 90hp??) or are there other losses?
In terms of power do you get a straight up 75% of the 4 cylinder output (say 90hp??) or are there other losses?
I thought elections were decided by angry posts on social media. - F5 Dave
Using an inductor is rare. But the 1 person I know of who did this routed the wires to the front of the radiator and bolted the inductor on there so it was sitting in the air stream.
Spark plugs stay in most cases. Still gets spark just there's nothing to light up. The spark plug hole is so restrictive it's a complete waste of time to remove it and take care of the air and oil pumping in and out. It was away from anything that could catch fire and the air was enough cooling.
So, as you know, a 600 has 4 sets of injectors. With the 5th set you unplug the injectors on 1 cylinder and plug in the 5th set, which aren't attached to fuel at all. They're simply there to make the ECU think there's still 4 working cylinders. Usually people cool them with a C shaped piece of tubing that attaches to both ends of the 5th injectors and fill them with water.
You have to do both injectors on a cylinder, otherwise it's not a triple.
It's less than 75%, depending on how you disable a cylinder. The best 450 triples have the piston + conrod removed (no pumping or friction losses) and they get somewhere around 72%. They do vibrate a little, but nothing serious. Still way more reliable and cheaper than a suped up twin though.
Zen wisdom: No matter what happens, somebody will find a way to take it too seriously. - obviously had KB in mind when he came up with that gem
Artificial intelligence is no match for natural stupidity
would removing the camshaft lope and crank on missing cyclinder help with balancing ?
No. If you go the full crank plus a bolted on bobweight you can achieve quite good balance.
If you take an end cylinder off including removing that crank throw, you're left with a 3 cylinder crank which is out of balance due to:
1/ the phasing - 2 up, 1 down at 180 degrees. Big rocking couple as the 2 up are adjacent.
2/ all the bobweights are all the same weight. To work, the one odd one must be the same weight as the total of the other two.
Laverda made this work on the 180deg triples - the center cylinder is the odd one and it's bobweights match the total of those on the outer two.
It's in balance...
I was told of a 450 triple built by reputable people iin ChCh. The valves had been removed but the piston was still in place. Inlet and exhaust ports blanked off. The guides had not been blocked however so oil went into the cylinder and it had a habit of hydraulicing till someone realised....
Here's a stupid question: which cylinder do you disable? Like take a sawzall to one of the end ones* or something else?
*I know that is unrealistic. No one has that much RTV and spare bits of MDF to block up the holes.
I thought elections were decided by angry posts on social media. - F5 Dave
Did that one end up with holes being drilled in the piston and tungsten being inserted into the wrist pin to balance it?
Most people have disabled #2 or #3. I had the opportunity to dyno my bike before the engine was rebuilt and we tested disabled different cylinders to see which would be the best. #1 was terrible (by comparison to the others) and it ran like shit, #4 was better but not as good as disabling #2 or #3. Probably different for other engines though.
Zen wisdom: No matter what happens, somebody will find a way to take it too seriously. - obviously had KB in mind when he came up with that gem
Artificial intelligence is no match for natural stupidity
BTW It seems like the original information on 450cc triples is no longer available at www.450triples.com but the Wayback Machine still has older copies.
Here is the method I plan on using.
Zen wisdom: No matter what happens, somebody will find a way to take it too seriously. - obviously had KB in mind when he came up with that gem
Artificial intelligence is no match for natural stupidity
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