Can a Rocket III take down the establishment, and rule this island

[wjb]

It looks like less than 1/3rd throttle on your bike is equal to 100 percent throttle on a stock RIII!
That's certified "Monster" territory!

 

[Jagster]

Just trundled through this thread for the first time. I'm SUBSCRIBED!!!

Great work. Thanks for bringing us along for the ride

 

[R-III-R Turbo]

So now that the serious operations are complete I got the beast transported from the theatre to where I work, so I can work on tuning & riding it (weather & time permitting).
This presented a mildly interesting photo op.
This is a 2.4L van, carrying a 2.5L bike.

 

[tripledog]

Awsome.
Did you ride it in?

 

[R-III-R Turbo]

Awsome.
Did you ride it in?

Yes, rode it up. Sent my busa the other way, it has lost compression and won't start, so I left it in 1st and used the starter to pull it up into van.

 

[R-III-R Turbo]

Do my throttles need a balance?

Can anyone guess what is going on here

 

[TURBO200R4]

Maybe you're getting those readings while the motor is cranking.

 

[R-III-R Turbo]

Maybe you're getting those readings while the motor is cranking.

It's because I'm now running a BMW 2.5 bar MAP sensor instead of the stock Triumph 1 bar

As it turns out, it's more like a 2.6 bar BMW MAP sensor and the stock Triumph a 1.2 bar I think.
I was seekng 15 - 16 psi on the stock one so even when going into boost the stock one was able to read low level of boost not just 0 - 1000hPa (1 bar) max.

Say for example here the barometer which is almost identical afaik to the stock MAP sensor, is seeing 1023hPa but transmitting only 4.12V.
Based on this, one could calculate the stock MAP to be good for over 1200hPa or 1.2 bar at 5.0V.

Also in the above you can see the new MAP is transmitting 2.00V to the ECU, so if the barometric is accurate at 1023hPa, the BMW MAP will read up near to 2.6 bar at 5.0V.

Anywho if you do the calcs, idling at around 640hPa with a stock MAP will read 640 on screen because the ECU parameters that we cannot see make it so (its programmed for a ~1.2 bar MAP so 4.12V means 1023hPa), and when you switch it out to a ~2.5 bar MAP the voltage drops and the ECU thinks the MAP is seeing 340hPa instead, and displays that.

So without a voltage correction gizmo my displayed MAP values will be way off actual but i reckon that's ok as long as i compensate for it in the map tables.

 

[Frans]

euh...but if you are looking for 16psi (1100hpa) and stock can do 1200hpa switching back to stock means you don't have to change the map tables? is that then not less work? and the 1.2 stock version has a better fine-reading due to 5 volt for 1200 and not 5 volt for 2600.

way out of my comfort zone here

 

[wjb]

If you are going to see 16 PSI at max boost, that's a little over 2 times atmospheric pressure so you would need a MAP sensor that can measure that pressure. If the stock MAP sensor max's out at 1.2 BAR it couldn't give correct info for fueling above that.

Curious, why does BMW even have a 2.6 BAR sensor???
Are any of their bikes supercharged?