Altitude Issues

[FLTRI]

Sorry for the misunderstanding Ron. I guess my lack of on road experience with Vrods have me treating it like any other engine.
Here's a loaded question for you:
What KPA do you see on your Vrod at 5% throttle?
Bob

[whittlebeast]

Here you go Bob.  It took me about 3 min to get the answer you were asking for.

http://www.nbs-stl.com/HarleyTuning/VrodTps5.png

For the people that have MLVHD, here is the filter I used.

[TPS]>6 or [TPS]<4

Have fun tuning

Andy

[FLTRI]

Here you go Bob.  It took me about 3 min to get the answer you were asking for...
Have fun tuning

Andy

Sorry Andy, can you go ahead and answer the question?
"What KPA do you see on your Vrod at 5% throttle?"
Thanks,
Bob

[whittlebeast]

That is the answer.  Do I need to go back to how to read a scatter plot?  Try asking Steve as I am fairly sure he has a fairly solid understanding of them.

[rbabos]

Sorry for the misunderstanding Ron. I guess my lack of on road experience with Vrods have me treating it like any other engine.
Here's a loaded question for you:
What KPA do you see on your Vrod at 5% throttle?
Bob

Unless you can give me an average situation in operation, I can see 10.3-100kpa (98 actual) at 5%.
Ron

[hrdtail78]

Unless you can give me an average situation in operation, I can see 10.3-100kpa (98 actual) at 5%.
Ron

What altitude are you at?  I didn't think you were at a high altitude.   I would try and get the Cam tune feature for vision turned on and adjust that.

[whittlebeast]

He would have to be near idle at near sea level to get to 98 KPA at 5% throttle.  And I bet the throttles needs to be fairly large.

[FLTRI]

That is the answer.  Do I need to go back to how to read a scatter plot?  Try asking Steve as I am fairly sure he has a fairly solid understanding of them.

So again, no answer. I need to get the answer from someone else?
Bob

[FLTRI]

Sorry for the misunderstanding Ron. I guess my lack of on road experience with Vrods have me treating it like any other engine.
Here's a loaded question for you:
What KPA do you see on your Vrod at 5% throttle?
Bob

Unless you can give me an average situation in operation, I can see 10.3-100kpa (98 actual) at 5%.
Ron

How about steady state cruise at 75mph? 5th gear flat level ground without wind. What is the kpa/tp? Should be about 20kpa @ 5% throttle right?
Bob

[whittlebeast]

On the VRod log I was looking at his motor was holding 75 MPH at 11% throttle at 42 KPA.  I have no idea if the road was level....

Try popping any Power Vision on any VRod and jump on the highway.  It is right on the screen.  No logging required.

On a VRod, the vast majority of time is spent below 5.6% throttle.  You are going to have to trust me on that one because I can't prove it without math or pretty pictures.

Andy

[rbabos]

Unless you can give me an average situation in operation, I can see 10.3-100kpa (98 actual) at 5%.
Ron

What altitude are you at?  I didn't think you were at a high altitude.   I would try and get the Cam tune feature for vision turned on and adjust that.

1040 where I live. Just checked the PV a few minutes ago. 98.13
Ron

[rbabos]

On the VRod log I was looking at his motor was holding 75 MPH at 11% throttle at 42 KPA.  I have no idea if the road was level....

Try popping any Power Vision on any VRod and jump on the highway.  It is right on the screen.  No logging required.

On a VRod, the vast majority of time is spent below 5.6% throttle.  You are going to have to trust me on that one because I can't prove it without math or pretty pictures.

Andy

Sounds about right. Did I send you a log at some point?
Ron

[whittlebeast]

A few people have sent me VRod logs over the last few weeks.  I just grabbed one.  It was named log0004.csv at 1.2 meg

[rbabos]

Sorry for the misunderstanding Ron. I guess my lack of on road experience with Vrods have me treating it like any other engine.
Here's a loaded question for you:
What KPA do you see on your Vrod at 5% throttle?

Unless you can give me an average situation in operation, I can see 10.3-100kpa (98 actual) at 5%.
Ron

How about steady state cruise at 75mph? 5th gear flat level ground without wind. What is the kpa/tp? Should be about 20kpa @ 5% throttle right?
Bob

Very poor guess on your part.
What Andy reported in one of his logs seems close to what I remember.
I have a log of mine here showing 70mph for long enough to trust the figures. 10% TPS, 36.5 KPA at 5150 rpms.
Ron

[FLTRI]

Damn Ron, I thought ought you said you cruise at 20kpa? Steady state.
Or were you simply stating that you saw 20 during a tail wind while cruising?
Or were you going slightly downhill when you saw 20kpa at cruise.
No guessing involved,
Bob

[hrdtail78]

Downshift.   It's a vrod.

[rbabos]

Damn Ron, I thought ought you said you cruise at 20kpa? Steady state.
Or were you simply stating that you saw 20 during a tail wind while cruising?
Or were you going slightly downhill when you saw 20kpa at cruise.
No guessing involved,
Bob

I never exactly said I cruised at 20kpa. Your mind went off in a tangent again. I have seen mid 20s in light cruise in the right conditions, strong tail wind being one example but normally it's around 34kpa.
My original statement was regarding tuning the  4-5% tps in rpms between 2500-3500.  In steady state these areas produce mid 20s kpa. This is the area most difficult to dial in due to that reversion crap. I know you know that and are just fkg with me as usual. 
Ron

[rbabos]

Downshift.   It's a vrod.

That statement makes no sense unless the tune is so bad it runs like crap under 4k. Oh, wait , you just described 99% of all v rod factory tunes. Then I agree with your statement .
Tune it well as you know ,  it will run smooth everywhere .
Ron

[FLTRI]

Downshift.   It's a vrod.

That statement makes no sense unless the tune is so bad it runs like crap under 4k. Oh, wait , you just described 99% of all v rod factory tunes. Then I agree with your statement .
Tune it well as you know ,  it will run smooth everywhere .
Ron

But you must admit, the engine loves to run over 3500 rpm. 
You can tune them to run smoothly under 3500 but you can tell it wants to run up above.
In fact they really like over 5000 even more! 
A truly stark difference from the big twin. They like to stay below 5000.
Bob

[rbabos]

Downshift.   It's a vrod.

That statement makes no sense unless the tune is so bad it runs like crap under 4k. Oh, wait , you just described 99% of all v rod factory tunes. Then I agree with your statement .
Tune it well as you know ,  it will run smooth everywhere .
Ron

But you must admit, the engine loves to run over 3500 rpm. 
You can tune them to run smoothly under 3500 but you can tell it wants to run up above.
In fact they really like over 5000 even more! 
A truly stark difference from the big twin. They like to stay below 5000.
Bob

True.
Ron

[hrdtail78]

If you are trying to run a vrod down the road at 25 kpa and have had problems tuning the thing at this cruise.  I would trade it in for a Harley.   Turning every thread into a "tune my vrod for me at a condition they were never made to run at" is never going to get you were you want to go.   It's a muscle, sport bike right?   Quit driving it like an old man.

[MaxxV4]

[quoteI have a log of mine here showing 70mph for long enough to trust the figures. 10% TPS, 36.5 KPA at 5150 rpms.][/quote]
Is that in 4th gear? 5150 @ 70 mph is really low gearing. Even my Vmax when it had stock rear end gearing would turn about 5K rpm @ 75 mph (in 5th) and it was geared really short. I guess in any case, it doesn't make a difference what gear you are using if you are trying to find out what kpa is required vs throttle position @ rpm.