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Question
Hey guys, quick question. I have a Rotax 720 in my sea doo
sportster. I badly need more power. What is the best way to get more power out of that engine? I am thinking of boring it out .5 and cutting the head. But I dont know if that would mess up the carb( same amount of fuel,but bigger firing chamber). Any idea's? Thanks! Justin Van Dyken |
Question
On Jul 4, 8:20 am, wrote:
Hey guys, quick question. I have a Rotax 720 in my sea doo sportster. I badly need more power. What is the best way to get more power out of that engine? I am thinking of boring it out .5 and cutting the head. But I dont know if that would mess up the carb( same amount of fuel,but bigger firing chamber). Any idea's? Thanks! Justin Van Dyken A different exhaust (expansion chamber) would help a lot. rememebring that from my old two strike motorcycle days. Here's a quick search. that 720 is pretty beefy, and mod's are relitivly cheap ,and easy: http://www.rossiereng.com/tech_pwc4.html |
Question
On Jul 4, 8:59 am, Tim wrote:
On Jul 4, 8:20 am, wrote: Hey guys, quick question. I have a Rotax 720 in my sea doo sportster. I badly need more power. What is the best way to get more power out of that engine? I am thinking of boring it out .5 and cutting the head. But I dont know if that would mess up the carb( same amount of fuel,but bigger firing chamber). Any idea's? Thanks! Justin Van Dyken A different exhaust (expansion chamber) would help a lot. rememebring that from my old two strike motorcycle days. Here's a quick search. that 720 is pretty beefy, and mod's are relitivly cheap ,and easy: http://www.rossiereng.com/tech_pwc4.html Justin Van Dyken wrote: Tim, Very helpful website!! I had been thinking about cutting the head as well but I was not sure what was a safey level to raise the compression too. This site lays it all out! Thank you Justin Van Dyken |
Question
On Jul 4, 4:22 pm, Justin Van Dyken wrote:
On Jul 4, 8:59 am, Tim wrote: On Jul 4, 8:20 am, wrote: Hey guys, quick question. I have a Rotax 720 in my sea doo sportster. I badly need more power. What is the best way to get more power out of that engine? I am thinking of boring it out .5 and cutting the head. But I dont know if that would mess up the carb( same amount of fuel,but bigger firing chamber). Any idea's? Thanks! Justin Van Dyken A different exhaust (expansion chamber) would help a lot. rememebring that from my old two strike motorcycle days. Here's a quick search. that 720 is pretty beefy, and mod's are relitivly cheap ,and easy: http://www.rossiereng.com/tech_pwc4.html Justin Van Dyken wrote: Tim, Very helpful website!! I had been thinking about cutting the head as well but I was not sure what was a safey level to raise the compression too. This site lays it all out! Thank you Justin Van Dyken- Hide quoted text - - Show quoted text - No problem, man. Actually raising the compression is good, but then again, it's some "by guess and by golly" too Bad thing about modifying the head etc, is that you would have to change a lot of other stuff too. and getting the head right is another thing. That's for the pro's, that is if you have the coin to go with it. Yes, there's a lot of easier bot-on stuff that will do the job without having to do surgery.... good luck! |
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