monker
TY 4 Stroke Guru
I'll answer what questions I can...
It will be a little while until price info is available. HP and weight numbers will come first (hopefully soon) in case any changes need to be made. The sound is awsome, but I don't think any clips will be posted. I've seen a video on 2 different computers and it sounded totally different because of the speakers.
It will be a little while until price info is available. HP and weight numbers will come first (hopefully soon) in case any changes need to be made. The sound is awsome, but I don't think any clips will be posted. I've seen a video on 2 different computers and it sounded totally different because of the speakers.
BV1
Expert
If you do a before and after for the sound, vs a stock Phazer, the speakers will cancel themselves out.
As in no matter how the mic sounds we can get a comparision vs a stock Phazer. I am sure that whatever vid/sound clip we hear, will be better then another user making one up for the forums.
-Steve
As in no matter how the mic sounds we can get a comparision vs a stock Phazer. I am sure that whatever vid/sound clip we hear, will be better then another user making one up for the forums.
-Steve
FastEH!
Extreme
Pic's and sound clip??
I am missing something here where is the pic & clip???
I am missing something here where is the pic & clip???
FastEH!
Extreme
Never mind got it...any sound clips yet? 
Theo
Veteran
now we just need to hear it.... but as far as looks go im sold
Jack_Shaft
TY 4 Stroke Junkie
pro116 said:yamrx1 said:Wondering if the snow flap would fit the rx1 tunnel..
Yes check this link
www.ty4stroke.com/viewtopic.php?t=30864
Anybody have a part number for the new flap?
monker
TY 4 Stroke Guru
weight savings of 10-12lbs. No production pieces yet so there isn't a final number.
go200mph
Expert
Should there be any noticeable power gains?
monker
TY 4 Stroke Guru
go200mph said:
I would say yes, but there aren't any numbers yet. Seat of the pants feel, probably not. But side by side, phazer vs phazer yes.
BV1
Expert
I think on this engine, that a resonant intake and a resonant exhaust both tuned to the peak torque of the engine, should provide a descent seat of the pants feel. Heres why....
As in, I agree that most exhausts take away a little bit of lower end, and add a bit of top end, so you dont really FEEL the extra Torque because there isnt any more peak torque, just a bit more peak HP due to the fact the torque curve doesnt fall off as fast in the upper RPMS (less restrictions), but you sacrific a bit of low end peak torque because of the effect the lesser restriction has on low-end resonance.
With this sled with the peak torque being around 9000 RPM, its high enough (2000 RPM from PK HP) that a properly designed exhaust system should add to the peak TQ for a greater seat of the pants feel. (As you dont feel HP you only feel TQ).
Im saying that I dont think you can move the PK torque RPM any higher then it is right now, or any closer to the PK HP RPM. So what I would suggest, and what Im going to do on my sled, is pick an exhaust and pipe combination that together resonates at the current PK TQ of around 9000 RPM.
This, combined with an intake pipe that resonates at 9000 RPM, should add to the PK TQ to create a powerband from 9000-12000 RPM. As in, you may only gain say 3-5 HP top end, but the gains in Torque from making the exhaust and intake resonate at the same RPM as the cams and the engine (say 9000) will mean that you are making very close to PK HP (say 85) already from 9000-12000 RPM.
This is all merely theoretical for this sled, it may be tuned for MAX output already, and maybe the Excel exhaust is tuned to match the current Phazer PK TQ RPM but Im just stating my opinion based on my tuning experience with 4 stroke automobiles. After years of designing exhausts for flow, I've found that designing for resonance if far more effective.
In English, in this case, lower restriction may not be the answer, as lower restriction generally shifts the TQ band up higher in RPM and its really high as it is, in this case I would suggest a specific level of restriction to keep the powerband where it is and useable is needed.
I do believe the Phazer is Capable of 90 HP Naturally aspirated. In fact Im near darn sure of it. I think as mentioned earlier in the year that the Phazer is based off of half an R1 engine, based on bore/stroke Redline and power out.
http://www.yamaha-motor.com/sport/produ ... /home.aspx
If the R1 can make 45 HP per cylinder @ 12,500 RPM with only 4 valves per cylinder (2007 is 16v, 2006 was 20v) and the Phazer has the same bore&stroke but with 5 valves per cylinder, even without the variable length runners on the R1 (designed to maintain TQ at lower RPM's AND high RPMS) we should be able to tune it to make 45 HP per cylinder also (90HP) as we dont care about the TQ at the lower RPMS that the variable length runners provide.
I think Yamaha just toned it down abit for the Genesis 80, for safety and with a few small tweaks and some time we will see some easily attainable gains that provide a better seat of the pants feel and great sound too. Like all things it will just take a little trial and error.
IMO,
-Steve
As in, I agree that most exhausts take away a little bit of lower end, and add a bit of top end, so you dont really FEEL the extra Torque because there isnt any more peak torque, just a bit more peak HP due to the fact the torque curve doesnt fall off as fast in the upper RPMS (less restrictions), but you sacrific a bit of low end peak torque because of the effect the lesser restriction has on low-end resonance.
With this sled with the peak torque being around 9000 RPM, its high enough (2000 RPM from PK HP) that a properly designed exhaust system should add to the peak TQ for a greater seat of the pants feel. (As you dont feel HP you only feel TQ).
Im saying that I dont think you can move the PK torque RPM any higher then it is right now, or any closer to the PK HP RPM. So what I would suggest, and what Im going to do on my sled, is pick an exhaust and pipe combination that together resonates at the current PK TQ of around 9000 RPM.
This, combined with an intake pipe that resonates at 9000 RPM, should add to the PK TQ to create a powerband from 9000-12000 RPM. As in, you may only gain say 3-5 HP top end, but the gains in Torque from making the exhaust and intake resonate at the same RPM as the cams and the engine (say 9000) will mean that you are making very close to PK HP (say 85) already from 9000-12000 RPM.
This is all merely theoretical for this sled, it may be tuned for MAX output already, and maybe the Excel exhaust is tuned to match the current Phazer PK TQ RPM but Im just stating my opinion based on my tuning experience with 4 stroke automobiles. After years of designing exhausts for flow, I've found that designing for resonance if far more effective.
In English, in this case, lower restriction may not be the answer, as lower restriction generally shifts the TQ band up higher in RPM and its really high as it is, in this case I would suggest a specific level of restriction to keep the powerband where it is and useable is needed.
I do believe the Phazer is Capable of 90 HP Naturally aspirated. In fact Im near darn sure of it. I think as mentioned earlier in the year that the Phazer is based off of half an R1 engine, based on bore/stroke Redline and power out.
http://www.yamaha-motor.com/sport/produ ... /home.aspx
If the R1 can make 45 HP per cylinder @ 12,500 RPM with only 4 valves per cylinder (2007 is 16v, 2006 was 20v) and the Phazer has the same bore&stroke but with 5 valves per cylinder, even without the variable length runners on the R1 (designed to maintain TQ at lower RPM's AND high RPMS) we should be able to tune it to make 45 HP per cylinder also (90HP) as we dont care about the TQ at the lower RPMS that the variable length runners provide.
I think Yamaha just toned it down abit for the Genesis 80, for safety and with a few small tweaks and some time we will see some easily attainable gains that provide a better seat of the pants feel and great sound too. Like all things it will just take a little trial and error.
IMO,
-Steve
FastEH!
Extreme
Anybody else make exhaust for the phazer?
I'm building my own exhaust for my mtn. lite. I'll post pics as soon as it's finished. I can tell you right noiw though it's going to have a major bling an coolness factor
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