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[Occam]

Seeking advice from the sage ones in here:

I ran the updater and now am using the MT8 files in Mastertune.
The added Cam Selector under Tuning Constants has added a twist.
I tried searching but didn't find a whole lot regarding my question.
That probably means the answer is obvious, right? 

Anyway, I'm running a bone stock 110 in my FXDFSE and the closest base map for my rig has different cam settings indicated than those listed on the HD site. Do I stay with the canned stuff, or bump the settings over to match what HD says the IVO and IVC are for the SE-255? What might I blow up if I choose to bump the settings to Harley's stated timing?

Thanks for your patience if I missed the answer in another post or in the TTS PDFs (I read those too).

[robertg]

I tried it both ways and I can't tell the difference, but I've also tried three different maps and can't tell the difference.

[lonewolf55]

For IVC you will have to trust the estimator as that data collection can be only be done on a dyno. Collect cam data and then use the analyzer to set your IVO.

[Occam]

Thanks for the responses guys.

So let me clarify.

My choices are

• a canned base map and leave the cam section alone, and trust things to work out
• try plugging Harley's posted info into the Cam Selector estimator

*Excerpt from the 2011 HD Screamin' Eagle Pro Racing Parts catalog, page 55*
SE-255: lift 0.556"/0.556", I 211°/E 235°
Intake: 6° BTDC/25° ABDC, Exhaust: 48° BBDC/7° ATDC

Anyone else have an opinion?
I have read Steve Cole in another post, as mentioned, but it does not directly address this issue.

[timtoolman]

did you do the data  cam run ?  it only takes a few min. and can be done at idle,  It will tell you where to set the intake opening  by looking at the graph and where the line first changes the angle,   but you need a dyno  to set the  int. valve  closing  so its best to use the estimator for that  part.

[Occam]

Thank you Tim!
That's a procedure my wallet can handle.

I appreciate it.

[timtoolman]

Your welcome, ,   after the warm up  I started the recorder and let it idle for  around 3-4 minutes, I got around 1400 recording hits  as it idled, and stopped there , saved file them did the graph.  Just look at the graph after  the cam data run/idle ,click on analyze   and see where the first bend/change in the line as it goes up the scale . I run the woods 400-6  and the number for me was  (3)  It shows a decent example.  And dont even try the EGR stuff yet, its  really tough to figure it out  if v tuning , Over on HTT there is a posting  with many many pages on it,  The jury is still out on this part,

[strokerjlk]

Use a map that is for a 110 cvo. Forget about trying to match  components like exhaust etc.
when using a map designed for cvo the cam already matches.
sorry if I misunderstood your questionable.

[Steve Cole]

http://harleytechtalk.org/htt/index.php/topic,35308.0.html I think you will find all the answers to your questions. Setting the IVO/IVC on the camshaft is by far the best way to match to your engine.

[hogsty]

http://harleytechtalk.org/htt/index.php/topic,35308.0.html I think you will find all the answers to your questions. Setting the IVO/IVC on the camshaft is by far the best way to match to your engine.

Steve, if I understand correctly, there are 7 IVO settings and only 3 IVC settings.  That would indicate to me that the IVO is more important than the IVC.  So, can we just go through the procedure to set the IVC and use the estimator for the  IVC  value?  If so, it should be a relief for those of us without a dyno

[Steve Cole]

You need to look at it a little differently. The truth is you can do the IVO very quickly and easily but the IVC requires a Dyno and test equipment. In the past no one set either or tested for either other than what was already in our base calibrations and it worked OK. So if your going to be able to only set one correctly, isn't that 50% better than you were before? As far as the amount of adjustments, I would have liked it if there were a few more on the IVC side but that's all there is. If it were mine I would at least do the IVO setting.

[Occam]

Use a map that is for a 110 cvo. Forget about trying to match  components like exhaust etc.
when using a map designed for cvo the cam already matches.
sorry if I misunderstood your questionable.

That's the crux of the issue; is the cam tuning in the base map adequate, or should one go to the trouble of setting IVO/IVC?
I had decent results with my new exhaust with MT7s before the upgrade. The closest MT8 map was quirkier.
I did do the matching as prescribed (combo CamTuner then Estimator for IVC).

[Occam]

http://harleytechtalk.org/htt/index.php/topic,35308.0.html I think you will find all the answers to your questions. Setting the IVO/IVC on the camshaft is by far the best way to match to your engine.

You need to look at it a little differently. The truth is you can do the IVO very quickly and easily but the IVC requires a Dyno and test equipment. In the past no one set either or tested for either other than what was already in our base calibrations and it worked OK. So if your going to be able to only set one correctly, isn't that 50% better than you were before? As far as the amount of adjustments, I would have liked it if there were a few more on the IVC side but that's all there is. If it were mine I would at least do the IVO setting.

Thanks, Steve.
As mentioned above, I did the halfway point.
It did make a noticeable difference.
2 or 3 V Tunes and I'll post results.

I'll check out the info at the link you provided.