Premium Member howworkclutch Posted June 26, 2015 Premium Member Share Posted June 26, 2015 has there been a shootout yet? -HowWorkClutch Link to comment Share on other sites More sharing options...
ryan4130 Posted June 26, 2015 Share Posted June 26, 2015 I tried asking the same thing in the "performance exhaust rant thread" and no clear answer. Dobeck could probably compare their graphs from tuning and see which gives the most gains. I expect that all exhausts are very very close to each other '15 FZ-09 Cadmium Yellow '15 White Fz-07 - Sold Link to comment Share on other sites More sharing options...
Cruizin Posted June 26, 2015 Share Posted June 26, 2015 Dobeck performance sells almost every exhaust for the FZ-07 and Mr Dobeck invented the Dynojet Dyno. Go to their supporting vendor board on here and they have accurate dyno charts for most of the exhausts. The info on their board in different exhaust threads. Yamaha MT-10 ForumYamaha Tracer 900 Forum Yamaha Ténéré 700 Forum Link to comment Share on other sites More sharing options...
Premium Member howworkclutch Posted June 26, 2015 Author Premium Member Share Posted June 26, 2015 except for one, they're all pretty much the same. -HowWorkClutch Link to comment Share on other sites More sharing options...
Premium Member hobbs Posted June 26, 2015 Premium Member Share Posted June 26, 2015 Pretty sure sure Arrow put out the biggest top end gain. Everything went braap. Link to comment Share on other sites More sharing options...
2wheeldynoworks Posted June 26, 2015 Share Posted June 26, 2015 The best results we've seen to date is full Yoshimura exhaust. According to the EJK website, Akrapovic had the highest numbers on their graphs. Link to comment Share on other sites More sharing options...
dpc46 Posted June 26, 2015 Share Posted June 26, 2015 Awesome. I just bought the Akra system. Nels I'll be calling you to set something up after it comes in Link to comment Share on other sites More sharing options...
Premium Member howworkclutch Posted June 27, 2015 Author Premium Member Share Posted June 27, 2015 i'm coming up with approx lengths for short-pipe exhausts of 41" and long-pipe exhausts of 55". if anyone has a measuring tape and either an arrow full, akr ti full, or a yosh full, could you please measure the length of the exhaust from engine manifold to opening? i'm using some image manipulation to determine lengths, but i need a set of control numbers to calculate error rate. -HowWorkClutch Link to comment Share on other sites More sharing options...
JA50N Posted June 29, 2015 Share Posted June 29, 2015 Measuring with a dog leash and a tape measure I get approx. 46" from the block to the end of the can on my gosh full system. It is probably a little less than that as you are measuring on the outside bend radius on some of the bends. Link to comment Share on other sites More sharing options...
Premium Member grahamfz07 Posted June 29, 2015 Premium Member Share Posted June 29, 2015 i'm coming up with approx lengths for short-pipe exhausts of 41" and long-pipe exhausts of 55". if anyone has a measuring tape and either an arrow full, akr ti full, or a yosh full, could you please measure the length of the exhaust from engine manifold to opening? i'm using some image manipulation to determine lengths, but i need a set of control numbers to calculate error rate. I measure approx 54" on my arrow full, but it is smokin hot at the moment. When it cools down i can get you something more accurate if you like Link to comment Share on other sites More sharing options...
Premium Member howworkclutch Posted June 30, 2015 Author Premium Member Share Posted June 30, 2015 i'm coming up with approx lengths for short-pipe exhausts of 41" and long-pipe exhausts of 55". if anyone has a measuring tape and either an arrow full, akr ti full, or a yosh full, could you please measure the length of the exhaust from engine manifold to opening? i'm using some image manipulation to determine lengths, but i need a set of control numbers to calculate error rate. I measure approx 54" on my arrow full, but it is smokin hot at the moment. When it cools down i can get you something more accurate if you likeyes please. no hurry as i'm going out of town tomorrow and can't do anything with the data. there is one inch difference between the number i came up with and what you measured. that means the % of error is fairly small. jasons 46" measurement is curious. either my short-pipe measurements are off, or the gosh full system is tuned for something outside the norms, or the arrow system is a bit off. i wish i had time/tools to degree the exhaust cam and lay this all to rest. -HowWorkClutch Link to comment Share on other sites More sharing options...
Premium Member grahamfz07 Posted June 30, 2015 Premium Member Share Posted June 30, 2015 I measure approx 54" on my arrow full, but it is smokin hot at the moment. When it cools down i can get you something more accurate if you likeyes please. no hurry as i'm going out of town tomorrow and can't do anything with the data. there is one inch difference between the number i came up with and what you measured. that means the % of error is fairly small. jasons 46" measurement is curious. either my short-pipe measurements are off, or the gosh full system is tuned for something outside the norms, or the arrow system is a bit off. i wish i had time/tools to degree the exhaust cam and lay this all to rest. Sure thing. Will get exact measurement after dinner for ya Link to comment Share on other sites More sharing options...
Premium Member grahamfz07 Posted June 30, 2015 Premium Member Share Posted June 30, 2015 Well its actually 61" when i follow the pipes from the header flange back to muffler outlet with a piece of wire following the curves. Hope that helps Link to comment Share on other sites More sharing options...
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