Blaster 700?
- Thread starter Blasterhart43
- Start date
..... just wow.
While it might seem rather inticing to think about, let's discuss a few of the technical difficulties here.
First, a wave runner (or jetski, whatever you call it) has NO transmission at all. They are direct drive through a rubber coupler that turns the impeller the entire time. "Neutral" is achieved by balancing the amount of water being pumped out the back versus "thrust reversed" out the front.
Second, wave runner engines are high volume no pressure total loss cooled. They aren't designed to run as a closed loops system in part, because, of their co-location with a unlimited supply of cooling capacity. I'm not sure if it would be detrimental or not to run a jetski engine under pressurized coolant operation (my thoughts are not) but that would require basically a complete redesign in itself.
Third, we cannot cheat the laws of thermodynamics here.... 1 single 200cc 2 stroke puts out "X" amount of heat. 700cc twin puts out "X times 7/2" amount of heat. You would need a MONSTER radiator to have enough cooling capacity to run it (that's if you get the system to run under pressure!).
Fourth, jetski engines are designed with a single "wet" head pipe usually. While this is good for a jetski (less space and noise without sacrificing power too much) it wouldn't work well for a quad. The system would consume huge amounts of water to work like it's designed and without water in it, the pipe wouldn't work as well.
Fifth, the power to weight to size advantage of the blaster is in that it's small and nimble with a decent amount of power. Put a HUGE engine like what comes in a jetski in and while it may have a lot more power, it will suffer in the other ways. Maybe good for a hillshooter/dragger?
Now, if we want to delve into the ridiculous.... let's discuss the possiblity of putting a ~650cc snomobile engine in a blaster frame. They're designed to run in a manner SIMILAR to the blaster (pressurized coolant system with a shaft drive output and transmission). It would still take a monster cooling system (or very short operation times), custom pipes, and would be heavy and overpowered but it would be a lot less fab/redesign work....
While it might seem rather inticing to think about, let's discuss a few of the technical difficulties here.
First, a wave runner (or jetski, whatever you call it) has NO transmission at all. They are direct drive through a rubber coupler that turns the impeller the entire time. "Neutral" is achieved by balancing the amount of water being pumped out the back versus "thrust reversed" out the front.
Second, wave runner engines are high volume no pressure total loss cooled. They aren't designed to run as a closed loops system in part, because, of their co-location with a unlimited supply of cooling capacity. I'm not sure if it would be detrimental or not to run a jetski engine under pressurized coolant operation (my thoughts are not) but that would require basically a complete redesign in itself.
Third, we cannot cheat the laws of thermodynamics here.... 1 single 200cc 2 stroke puts out "X" amount of heat. 700cc twin puts out "X times 7/2" amount of heat. You would need a MONSTER radiator to have enough cooling capacity to run it (that's if you get the system to run under pressure!).
Fourth, jetski engines are designed with a single "wet" head pipe usually. While this is good for a jetski (less space and noise without sacrificing power too much) it wouldn't work well for a quad. The system would consume huge amounts of water to work like it's designed and without water in it, the pipe wouldn't work as well.
Fifth, the power to weight to size advantage of the blaster is in that it's small and nimble with a decent amount of power. Put a HUGE engine like what comes in a jetski in and while it may have a lot more power, it will suffer in the other ways. Maybe good for a hillshooter/dragger?
Now, if we want to delve into the ridiculous.... let's discuss the possiblity of putting a ~650cc snomobile engine in a blaster frame. They're designed to run in a manner SIMILAR to the blaster (pressurized coolant system with a shaft drive output and transmission). It would still take a monster cooling system (or very short operation times), custom pipes, and would be heavy and overpowered but it would be a lot less fab/redesign work....
.
while searching blaster parts on ebay, i have seen those engines and had the same thought in mind. i never really thought that much about the cooling issue but did think about the tranny. i figured one could fab some sort of primary drive and a harley tranny. crazy, i know. which is why you wouldn't attempt this type of swap. not to mention the cost of all of these parts.
With enough time and an endless supply of money one could do anything one set their mind to however impractical it might be.
I'm not saying that no one could or has never done it before (hell for all I know someone has done it before and is riding it around right now!). I just felt the need to point out the issues I have run across while dreaming about such ventures myself
That'd be way too much work and way to many problems. More could be achieved by say, putting a GSXR motor in a Banshee. High revving, powerful engine in a lightweight body.
I have seen jet ski motors repourposed for hot saw races (think formula 1 of chainsaws). That's pretty cool to see, there's probably better options for a blaster though.
I have seen jet ski motors repourposed for hot saw races (think formula 1 of chainsaws). That's pretty cool to see, there's probably better options for a blaster though.
as far as that cooling system being "no pressure", i'd say there is at least some pressure. some jetskis discharge the water at the back, up into the air. i've seen the water shoot at what looks to be maybe 6 feet or more into the air. so there is at least some pressure. besides, your average closed loop system is what, 12 to 15 pounds max. i'm just guessing there wouldn't be a problem making it a closed loop.
I don't think there would be any internal engine problem with pumping to 13-15 lbs. My thought was that most of those engines lack an internal driven water pump..... They use an impeller built into the pumpbox for coolant pumping. The jetski actually provides the engine with its fresh water supply.
You would have to "rig" something up to be mechanically linked to the crankshaft to pump coolant around the system and that pump would have to be able to handle the 13-15 psi.
dirtblaster03, since you mentioned it, look at the thread i just started.
http://www.blasterforum.com/yamaha-157/banshee-600-a-52016/#post654348
sicivicdude, i see. i did not realize that jet ski engines do not have a internal pump. you learn something new every day.
http://www.blasterforum.com/yamaha-157/banshee-600-a-52016/#post654348
sicivicdude, i see. i did not realize that jet ski engines do not have a internal pump. you learn something new every day.
I looked at the parts diagram for the 700 wave blaster and don't see an internal water pump but I have never torn one down for myself to see.
I KNOW for a fact that the yamaha GP1200 (1200 cc 3 cylinder) engines do not have an internal water pump, they have a water line off the stator plate (behind the impeller) that pushes water up to the engine for cooling. Then some portion of that is routed into the tuned pipe to begin the cooling process and the rest spills out the water box (muffler) with the rest of the exhaust.
