RX_rider
Veteran
so how many hp does the RX motor have on the dyno . is it somewhere around like 137 at about 9800 rpm?
SoCoRX1
TY 4 Stroke Guru
most people get 135-138 on the dyno
welterracer
TY 4 Stroke God
You are right.. It is in the mid 130s.. stock
Freddie from ECP dynoed many many of them..
Freddie from ECP dynoed many many of them..
welterracer
TY 4 Stroke God
You are right.. It is in the mid 130s.. stock
Freddie from ECP dynoed many many of them..
Freddie from ECP dynoed many many of them..
justin1635
Extreme
- Joined
- Mar 10, 2005
- Messages
- 56
More with a turbo
ReX
TY 4 Stroke God
If it has 137 stock corrected to room temperature.
How much does the 137 hp motor make at -15°C (or close to 0°F).
How much does the 137 hp motor make at -15°C (or close to 0°F).
ReX
TY 4 Stroke God
I just did a quick search and found this link:
http://wahiduddin.net/calc/calc_hp.htm
It's an engine hp correction calculator.
It looks like an engine will make about 11.6% more power at 0F than it will at 75F.
So - if the jetting is correct at 0F, a engine making 137 hp at room temperature will make 153 hp at 0F.
If you're riding at 20F, it will make about 149 hp.
If you're riding at 30F, it will make about 147 hp.
I guess when Yamaha claims 145+ hp, they are about right - considering you pretty much always ride at below freezing temperatures.
http://wahiduddin.net/calc/calc_hp.htm
It's an engine hp correction calculator.
It looks like an engine will make about 11.6% more power at 0F than it will at 75F.
So - if the jetting is correct at 0F, a engine making 137 hp at room temperature will make 153 hp at 0F.
If you're riding at 20F, it will make about 149 hp.
If you're riding at 30F, it will make about 147 hp.
I guess when Yamaha claims 145+ hp, they are about right - considering you pretty much always ride at below freezing temperatures.
RX_rider
Veteran
thanks alot for the replys. so why does yamaha say 145 ifs it like 10 off? so shuld that mean that the apex has like but 143? but i guess with efi that you get better more consistant hp no matter the air temp? wha you guys think?
RX1 Yooper
TY 4 Stroke Junkie
Yamaha says the 06 has 8 more than 05. 150-8=142. I've always heard it was about 142.
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