YZ450F - PR2 dyno runs?

[n16ht5]

I have a 17 YZ450F with FMF pipe otherwise stock. Does anyone have any actual dyno runs with aftermarket ECU's??? I hear big claims with no backup. I heard from one person that he gained 2hp on the dyno, but no images. I have no problems with motor temps. I know that the KTM 500 / FE501 bikes gain a huge amount of power... not sure about the 450s

 

[wwillf01]

I have a 17 YZ450F with FMF pipe otherwise stock. Does anyone have any actual dyno runs with aftermarket ECU's??? I hear big claims with no backup. I heard from one person that he gained 2hp on the dyno, but no images. I have no problems with motor temps. I know that the KTM 500 / FE501 bikes gain a huge amount of power... not sure about the 450s

So we have a shop called Proven Moto in town..... We dynoed the 18 fx and 17,16 yz 450 with that Ecu. Both were crazy lean on the low end like mid 20's (I have never heard of a failure because of this but it is a little lean for my taste) and only gained an hp or so. They changed it up and were able to gain about 6. They can also reprogram the oem ecu but you still don't gain the over fueling issue if the engine is not kept warm enough... Also huge gains with this combined with the GYTR head set up..

 

[n16ht5]

So the proven moto changed up the PR2 maps and OEM maps?

 

[wwillf01]

So the proven moto changed up the PR2 maps and OEM maps?

They can do either..... If they reprogram the stock ecu you do not get the overfueling shut off option.... This is not an issue as long as you keep your engine warm.

 

[powdermuncher]

Are there any actual dyno sheets we can see or still just talk.

So far I have not seen the huge gains on the snow.

I have used the Yamaha tuner to eliminate the lean spots to the best of my abilities and that showed up well on head to head runs.

Is the big increase just over a stock mapped bike or over one with a well set up snow bike map done with the Yamaha tuner.

 

[wwillf01]

I asked for the print out but he can't find it at this point... For the guys I ride with they are not running stock bikes... They have came, gytr heads yada yada... So the reprogram really brought out a good amount of hp... I know all have reported being able to obtain a much smoother richer running map... There are noticable gains... At least on the bikes I have rode... The more after market parts you have I think the more important it is to get the most out of them... Also keep in mind at least on the 17 and older models they can access mainly more factors to change than the programmer from Yamaha...o can't speak for the newer models .. Proven Moto is very specific and only deals with 4 stroke racing machines...they did many builds for snowbikes and pro Motocross racers .... That is what they do....

Are there any actual dyno sheets we can see or still just talk.

So far I have not seen the huge gains on the snow.

I have used the Yamaha tuner to eliminate the lean spots to the best of my abilities and that showed up well on head to head runs.

Is the big increase just over a stock mapped bike or over one with a well set up snow bike map done with the Yamaha tuner.

Sent from my Pixel 2 XL using Tapatalk

 

[AllHatNoCattle]

I wonder if the dyno runs would really be that accurate anyways. I assume the big advantage is the way the reprogramming (and throttle body mod in that other thread) affect the horsepower when you are at a high elevation with a lower air and engine temperature.

If you do a dyno run at a lower elevation in a warm shop... are those accurate results? I think the only way to know is to take the dyno up to the alpine, or just go with the butt dyno.

 

[powdermuncher]

Sounds to me like a lot of oh well you know maybe for sure if you woda do this and that and the other in revers to the left you would see more of a improvement.

There is a lot more to a snowbike or really any performance machine than coaxing an other 2 hp out of it, a well set up suspension and drive system probably gain you more improvements than a few more Hp on a inefficient setup.

Now I may buy that the standard tuner may not be able to get the maximum performance out of a severely modified engine due to being limited to keep the stock engine within save perimeters

 

[wwillf01]

Agreed but the Dyno sits about at 6000ft.... And is opened to the outside when running if needed... But like anything it is only a tool ...stock bike should be pretty easy.... But once you start throwing all types of crap on the mix it gets much harder.

I wonder if the dyno runs would really be that accurate anyways. I assume the big advantage is the way the reprogramming (and throttle body mod in that other thread) affect the horsepower when you are at a high elevation with a lower air and engine temperature.

If you do a dyno run at a lower elevation in a warm shop... are those accurate results? I think the only way to know is to take the dyno up to the alpine, or just go with the butt dyno.

Sent from my Pixel 2 XL using Tapatalk