Dyno'd my 2016 Roadster

[ChicagoRocket]

On your dyno sheet, the torque dipped and went squiggly at about 5600. I've had 2 Rockets with different exhausts, one with TORs and a custom tune and the other with Jardines and triple filters and a custom tune. Both torque curves decreased smoothly until the rev limit. The hp plateaus starting at about 5800. I don't know what his tune looks like so I couldn't say for sure. The newer R3R tunes are unrestricted except at above about 5600 where the secondaries are closed. If you opened the secondaries in TuneEcu without also adding fuel, you could see this loss of power. At the stock rev limit (6300), the power drops to zero.

Hmmm. Both those things my tune supposedly removed. What can I do to remedy this?

 

[dougl]

Do they work in the higher Rpms too? My tune supposedly removes that restriction.

In a previous discussion about the upper end restriction in the newer R3R tunes, I believe Neville said that you can't open the secondaries at the higher end without adding fuel.

 

[ChicagoRocket]

Could this be my issue???

PSA - TuneECU might be dangerous on 2014+ R3s.

 

[dougl]

Could this be my issue???

PSA - TuneECU might be dangerous on 2014+ R3s.

I wasn't aware of the issues with TuneECU and partial cutoff at 5800 rpm. All the more reason to check your A/F and make sure it's below 13 at the top end. Hard to believe that TuneECU causes this and that Alain hasn't confirmed it.

 

[leatal]

Hmmm. Both those things my tune supposedly removed. What can I do to remedy this?

I read a thread here a while ago of a rocket pilot who had a dip in the mid 2K range while having his bike on the dyno. I believe he had the secondaries opened up to 100% during the session. The tuner close the seconaries to 75% when the dip occurred and it brought the power curve back to linear.

 

[ThingKing]

I had Ramair and TuneEcu in place, had my PCIII tuned on top of it and got that dip as well. Mine was even worse.

It disappeared completely after mounting CES headers and having the ECU dyno-tuned directly. Power gain between 5000 and 6000 was enormous - if I remember correctly there was a power gain of up to 50+ hp in that rpm range.
So there is a lot to find, if one digs for torque in that range.

 

[ChicagoRocket]

I had Ramair and TuneEcu in place, had my PCIII tuned on top of it and got that dip as well. Mine was even worse.

It disappeared completely after mounting CES headers and having the ECU dyno-tuned directly. Power gain between 5000 and 6000 was enormous - if I remember correctly there was a power gain of up to 50+ hp in that rpm range.
So there is a lot to find, if one digs for torque in that range.

WOW! My biggest concern is if my bike is running lean...do you remember if your's got lean with that dip? What do you think caused yours?

 

[scot in exile]

I have it also!
Will sell cheaper than @scot in exile!

WHY ARE YOUSE BRETHERN VOTING TO STAY IN????

You know the Scots what ever the English want to do we do the opposite

 

[Ishrub]

You know the Scots what ever the English want to do we do the opposite

Trousers and skirts - I get it now

 

[Nat67]

Hey guys new to the business of tuning and still trying to glean information from all who know before attempting to destroy my beloved engine !
Would I be right in saying that tuning of a stock engine could only involve attaining the best possible air to fuel ratio over the entire rev range ? Obviously , the better an engine breathes and farts the more this air to fuel mixture has to be adjusted but am I missing something ? I know manufacturers build in restrictions , do the tunes overcome these ?
Do these restrictions require specific tunes ?
Please enlighten this ignoramus !