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[CVO2FIXUP]

 What are the pros and cons of these systems? Which one is the easiest to tune with ( on the dino ) Which one needs O2 sensors to be hooked up?  And which system is hands down superior?  Don't care about the marriage thing.

[2k]

I prefer the TTS, most likely easier to find a good dyno man with the SEPT. No experience with PV

[grc]

The TTS and SEPST can utilize O₂ sensor data, unlike the piggyback systems like the PC-V that force you to bypass the sensors and run open loop 100% of the time OR add a separate module to utilize wide band sensor data.  I can't think of a single valid reason to not use closed loop on a street bike.  Did you really mean PC-V, or did you mean Power Vision?

If you plan to have someone else tune the bike on a dynamometer, you would be best served to find the person you plan to pay to do the tuning first, then ask him about which device he recommends.

Jerry

[05Train]

A flash tuner is going to give you more control and better results than a piggyback tuner.  They also keep the O2 sensors in use.

[Steve Cole]

It's all about what you want as a customer. I am biased but in simple terms the TTS Mastertune unit will allow any tuner out there to do a better job. There is more access, to more information with a the TTS Mastertune system. Since the TTS Mastertune allows the tuner to get too and adjust more things, some people feel that makes it harder. Well, if they would just ignore the tables and information the other tuner system do not allow them to use, then it would be the same as the others. So it really boils down to what you the owner are after and what your tuner person is willing to do. Depending on how good the tuner person is and how much time they are willing to work on things like cold start and part throttle operation are what makes the bike run well and get good mileage but it does nothing for the WOT power printed on a piece of paper. There is a pretty good saying, "The best you know is the best you've had" so until you ride a bike that has had the part throttle areas properly tuned in both hot and cold weather its going to be hard to say what you think is good enough.

[hrdtail78]

TTS is hands down the best.  Talking dyno.  A good tuner should have the equipment and external O2's to deal with anything you can throw at them. 

[BigLew]

Trying not to highjack but I have a 09 with a 124 that has a PC 5 with a procharger and 12 lbs of boost. Just put a new engine in it similar to the old one. Should I stay with the PC 5 or go another route? Will the power commander 5 adjust itself to the differences in the new engine (new cam& higher compression)

BigLew

[SteveFLHTK]

You'll need a different tuner or a new map.

[BigLew]

You'll need a different tuner or a new map.

Care to elaborate? Both engines are the same size just a difference in compression and cam. I thought the PC 5 was a self learner? Did a coule of pulls last week and the AF looked good, maybe a little rich under boost and hp was down some. Just not sure if the PC 5 is the right choice or if something else would work better.

BigLew

[owl893]

CVO, I went through this with my bike not too long ago, I read every post here and on another website.  You have already received excellent responses from far more qualified guys than me, but, I would suggest a few things from my experience.

Ask yourself:
1. are you done with performance modifications? If you plan more, which ones?
2. are you interested in using a laptop program to make your own adjustments, and/or monitor performance feedback?
3. what and who is available to you? how far away, what is their experience and what system are they most familiar with? do you trust him? do you have referrals?

I don't know which system is "best", but after answering those questions and trying a V&H Fuelpac, I went with the SEPST, Dyno-ed by my dealer. I am pleased with the results.

OWL

[SteveFLHTK]

Care to elaborate? Both engines are the same size just a difference in compression and cam. I thought the PC 5 was a self learner? Did a coule of pulls last week and the AF looked good, maybe a little rich under boost and hp was down some. Just not sure if the PC 5 is the right choice or if something else would work better.

BigLew

You did not mention you had the Autotune module for the PC V.  The standard unit is not a learning unit without the add-on module.  Assuming you have it, it should adjust.....if not, you need something to re-tune, either a new canned map, the Autotune module, or a new device...your choice.  A cam and compression changes are not "little" changes, they need to be compensated for.

[grc]

To add my 2 cents to the equation, the so-called "auto tune" device still needs a good base map.  So with major changes you still need to come up with a good base map to match the changes first, then let the "auto tune" fine tune the fuel mixture.  Never forget, the "auto tune" only messes with fuel, and there are limits to how big the offsets should be even with a wide band system.

Nothing in life is truly automatic, no matter what the advertisers and con artists try to tell you.

Jerry

[05Train]

Correct.  The "auto tune" only adjusts VEs, not any of the other variables.

[Steve Cole]

Nothing in life is truly automatic, no matter what the advertisers and con artists try to tell you.

Jerry

 

Now if I said that Jerry I would get shot but you are totally correct!

[OBB]

Nothing in life is truly automatic, no matter what the advertisers and con artists try to tell you.

Jerry

You've never had an ex-wife that got her alimony a day late have you? That's an automatic pissed off!  Wasn't my fault the dept that collects it and sends it out was closed for a Holiday. It still came out of my paycheck when it was supposed to.
 

CVO, I went through this with my bike not too long ago, I read every post here and on another website.  You have already received excellent responses from far more qualified guys than me, but, I would suggest a few things from my experience.

Ask yourself:
1. are you done with performance modifications? If you plan more, which ones?
2. are you interested in using a laptop program to make your own adjustments, and/or monitor performance feedback?
3. what and who is available to you? how far away, what is their experience and what system are they most familiar with? do you trust him? do you have referrals?

I don't know which system is "best", but after answering those questions and trying a V&H Fuelpac, I went with the SEPST, Dyno-ed by my dealer. I am pleased with the results.

OWL

Good questions to keep in mine when coming to your decision.
 I know I've adjusted the tune on my truck several time with my handheld tuner that lets me into all kinds of variable tables and really wished I would have shelled out the bucks for a PC program instead of the limited amount of parameters I do have access to.