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[mayor]

I've played around with the IVO settings in the past, and that is based on a fairly easy test in Datamaster.  I'm thinking I might want to try testing the IVC setting, so I started reading over the Datamaster manual.  This one seems much less simple.     If I'm reading the manual right, I'm going to have to do some pretuning of the 3,500 and surrounding rpm's ve's just to be able to run the test since it has to be done at 13:1 afr.  I'm assuming that as long as I map the ve's in the 3,000, 3,500, and 4,000 to be able to hold an accurate open loop afr, that is all I need to do to get started right?  I hate to do more than that, since if I change the setting I could end up with a bunch of good for nothing values.  After I do that I need to set the eddy brake to hold 3,500 rpm's and do 5 kPa steps from 60 kPa to 100 kPa?  Any of you pros have any short cut suggestions, or is this pretty much how you are doing it?  I'm guesing that setting the brake on wheel speed is probably better than rpm speed, since the mph seem to be held tight by the brake. 

[Hilly13]

Mayor I am truely glad you have broached this subject, I have not seen it discussed in-depth on any forum as yet. 

[rider57]

I've played around with the IVO settings in the past, and that is based on a fairly easy test in Datamaster.  I'm thinking I might want to try testing the IVC setting, so I started reading over the Datamaster manual.  This one seems much less simple.     If I'm reading the manual right, I'm going to have to do some pretuning of the 3,500 and surrounding rpm's ve's just to be able to run the test since it has to be done at 13:1 afr.  I'm assuming that as long as I map the ve's in the 3,000, 3,500, and 4,000 to be able to hold an accurate open loop afr, that is all I need to do to get started right?  I hate to do more than that, since if I change the setting I could end up with a bunch of good for nothing values.  After I do that I need to set the eddy brake to hold 3,500 rpm's and do 5 kPa steps from 60 kPa to 100 kPa?  Any of you pros have any short cut suggestions, or is this pretty much how you are doing it?  I'm guesing that setting the brake on wheel speed is probably better than rpm speed, since the mph seem to be held tight by the brake. 

That's the way I thought about also, so I did it. Came out pretty good too!

[North Georgia Hawg]

That's the way I thought about also, so I did it. Came out pretty good too!

Did it come out with a different IVC setting than the Cam Estimator did? Just curious. With only 3 IVC settings available, it seems like a lot of work for results that might closely mimic the Cam Estimator anyway.

Plus, I don't have dyno! 

Ken

[mayor]

Plus, I don't have dyno! 

neither do I, but I have afriend that does..      

[rider57]

Did it come out with a different IVC setting than the Cam Estimator did? Just curious. With only 3 IVC settings available, it seems like a lot of work for results that might closely mimic the Cam Estimator anyway.

Plus, I don't have dyno! 

Ken

No, but it sounded and ran totally different, much, much better.
I think that the Estimator is just that.
The runs you tune towards getting to the point that you can do the IVC I see as the fine tuning you have to have to get accurate data. Long winded sentence, I know, I dont know how else to put it.
I also used a 5 gas Horiba to see the difference in emissions. Definitely cleaner running which came out to 4 horses and 3 lbs. 

[hrdtail78]

Different cals have more than 3.

[mayor]

did not know that...will have to pay more attention next time. 

[Buckeye_Tuning]

Different cals have more than 3.

Yup... that made it relatively easy for j1850 touring... having three.  Now with all the different kinds of calibrations out there and how things get mixed and matched...  I simply have to agree...  if it more than an easy pick from 3... needs a dyno to get best results.  Can't wait to see what the new calibrations for touring looks like.

[hrdtail78]

I hold my RPM to 3500.  I make sure I target 13 and map VE's until I'm there.  I don't worry about 3000 or 4000.  Or even 3250 or 3750.  I understand why this was asked, but for this test I haven't seen the other cells play in.  And we are in open loop.  3500 is in the middle of the cell, and so is 60, 65. 70......

After everything is set, and I am ready to do the test.  I put the bug on 3500 and open throttle until 60kpa.  Note my record time and hold 60, open throttle to next.......  My brake keeps up nicely if I slowly roll throttle on.  Whack the throttle and I have to wait for RPM to come down.  I believe the program will take anything out that isn't 3500 +- 50.

[mayor]

You make very good points with all that.  I never gave it a thought about only doing the 3,500 row, but did read in the manual that the program will filter anything outside of +/- 50 of 3,500.  I think it also said +/- 100 somewhere else to though, either way setting the ve's at 3,500 should work just fine.  makes sense at least.  I'm not sure I will mess around too much on cals with only three choices, but when I see ones with more will likely do a test. 

[North Georgia Hawg]

neither do I, but I have afriend that does..      

Wish I did! 

This in an interesting and informative discussion. Thanks Hrdtail78 for the info.

Ken

[Hilly13]

I find rider57's coment on the ivc point not changing from the estimator but the bike ran better after the procedure interesting, that would suggest something is changed in the calibration other than the 1, 2 or 3?