EJK controller from Dobeck Performance Build Update
Stage One Build update:
What to do on a snowy blizzardy Saturday afternoon.... internet bench racing what else!!
Now remember the guy who invented and built my new Fuel Tuner invented the Dynometer.
He believes in two performance numbers:
1. Dyno numbers are scientific based parameters under ideal controlled conditions
2. Real world tunes based on philosophy of making power that includes altitude/ Heat / etc..
...Been looking at some dyno runs from different performance bike shops building Yamaha Bolts with various Stage 1 Bolt ons....since the driveline for the Yamaha Bolt XV950 has been around since 2014 there is a lot of data available:
The link below shows dyno runs with various components.
http://www.ivansperformanceproducts.com/bolt.htm
Exhaust:
Factory exhaust /stock airbox with factory paper filter and stock Fuel maps= 49HP at the wheel
Vance and Hines:
https://products.vanceandhines.com/store/yamaha/48533/
The Vance and Hines two into one performance slip on with stock airbox with factory paper filter and stock Fuel maps.(+4/5HP)image6.gif
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Funny thing is V&H slip on is out performing full custom exhaust systems on the dyno
The K&N Intake and filter with stock exhaust / airbox with factory paper filter / stock Fuel maps and factory exhaust makes 7HP
“On the dyno ....produced an estimated additional 7.14 horsepower at 5,313 RPM and an equally beneficial 4.81 lb-ft of torque at 4,581 RPM”
https://www.cycleworld.com/2015/06/04/kn-yamaha-star-xvs950r-bolt-rk-series-air-cleaner
Simply adding a fuel tuner to a stock Bolt with factory airbox and exhaust adds 4HP.
By removing the O2 sensor and running an open loop allows the bike to fuel under load and ignition curves to advance.
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Vance & Hines Exhaust =4HP
K&N intake / filter = 7HP
Fuel Tuner = 4HP
That’s about a bump of +15HP over stock!
I have removed approximately 30lbs of weight off the bike : rear under fender metal / stock exhaust the size of a water heater / tail light mounts etc ...
Stock the bikes weigh 547lbs / 49HP =.089hp per pound
So I am at approx 517lbs / 60-65HP
=.116hp per pound
