How To: Add Pressure Input for PC-V

Yeah just leave the TuneECU tables as they are if your O2 is unchecked.


The 2000 RPM surging was connected with how I had the FL switch set.

Sadly and ironically, My mystery failure is consistent with two other bikes, both of which presented the same symptoms, both of which had multiple failures, neither had a QS installed, all three bikes had full trans rebuilds all three showed no obvious cause when torn down.
 

So when did you say you were buyig your own motorcycle dyno and hop up shop?
Yeah just leave the TuneECU tables as they are if your O2 is unchecked.


The 2000 RPM surging was connected with how I had the FL switch set.

Sadly and ironically, My mystery failure is consistent with two other bikes, both of which presented the same symptoms, both of which had multiple failures, neither had a QS installed, all three bikes had full trans rebuilds all three showed no obvious cause when torn down.


I know I don't have the power and torque you do... but you are helping me make up my mind to move to a Super Duke R.

Sorry you are having more issues. You can definitely tell you love your rocket and helping the rest of us.
 
Yeah just leave the TuneECU tables as they are if your O2 is unchecked.


The 2000 RPM surging was connected with how I had the FL switch set.

Sadly and ironically, My mystery failure is consistent with two other bikes, both of which presented the same symptoms, both of which had multiple failures, neither had a QS installed, all three bikes had full trans rebuilds all three showed no obvious cause when torn down.
Rob, so bummed to hear your bike is down. If anyone can figure it out its you!
 
Sad to hear, especially after all the development to date. Every time there is a gear box failure a tumult of diagnosis and suggestion posts appears but after your experiences you should be able to describe what has gone wrong to at least an initial extant. Did it go bang, crunch etc or just stop driving? Do you have the same machined mods as Fred has? They were to increase circlip or spacer seating depth from memory.
 
Trying to split the motor today and pull the trans will know more this evening. Starting a different thread for it.
 
The fuel table using throttle position vs RPM isn't granular enough to really perfectly tune the low throttle position parts. Most of the time when riding legal speeds, the Rocket will be at 0-5% throttle position, with a lot of time at 1% and 3%. The problem with that, is the PC-V table only has 0,2,5 percent columns. How do you add granularity? Use a pressure based table because you can make it as granular as you want. Here is how:

For example, when my PC-V reads 2% there's a small amount of "range" within 2%. At just barely 2% I run rich, at just under 3% but still registering at 2%, I run right at 13:1 AFR. How do you tune that with only a 2% column like in the stock TPS/RPM table? You can't. Thus the need for pressure tables at low throttle position. Now consider that 0% has a range within it as well and you'll start to see the problem.

I hope this helps anyone using a PC-V, Autotune, and POD-300, as it should yield a highly refined fuel table.

With some tweaking here's the granularity you can achieve with Pressure tables vs normal, which one do you think is going to run smoother when tuned?

Normal PC-V Mode:
granularity2.png


Speed Density PC-V Mode:
Granularity.jpg

Or you can use this map and stick to %TP/RPM and get as much granularity :thumbsup:

9000rpm Rocket III PCV Map Template (Superfine % Throttle)

upload_2018-6-8_18-39-51.png



oh and if you decide to break your bike, I'll take your throttles, coils and clocks :D
 
First rides done, gave it 20% authority +\- and left the TPS fuel table at where the it was. Set AT to work from 1750-8000 and left the left most 2 columns in the pressure target table at zero. Within 20 miles it’s already considerably smoother than it was just trying to tune with TPS table only. Snatch on throttle pickup from closed throttle is almost completely gone already!! Definitely worth doing @barbagris !! Since the pressure columns I made match the L-table in TuneECU transferring the values over to the base tune will be very simple so you can dial the base tune as close to perfect as possible l and then use the AT as just an O2 sensor or give it very low authority like 5% for seasonal changes etc.
So locked and loaded.

6000rpm map/gear with your AFR targets (20column) 15% richer / 10% leaner Auth. Did about 80miles. Straight off the difference was palpable - until I accidentally hit the kill switch and thought I'd buggered something. :banghead::banghead:

But thank you for making this EASY to do.

No throttle snatch at all - And I tried.
The engine is overall way more flexible too.
And I'll swear the AFR values displayed on the POD300 vary less.

I wish I had this map option in before having to potter through UK back-roads. Power rolls in as smooth as silk which has made "roundabouts" a lot more "fun".

I think it may be a little rich at times - but I want to run a full tank of fuel through to get meaningful sample numbers. Then I'll look at the trims and PCV logs.
I also want to check fuel - but as I have knackered my FuelBot that will have to wait a bit. :oops:

ANYBODY WITH AN AutoTune BOX ON THEIR PCV - I HIGHLY RECOMMEND YOU DO THIS.
 
Glad it worked for you!

One big plus is that speed density is almost immune to altitude and barometric changes so it should yield a more consistent bike as well.
 
Back
Top