Yeah you can adjust timing with TTS, SESPT, TMAX... maybe some others. Its easier to do with TTS and some say it uses a more effective timing method, but none provide much feedback if you are on the right track or not. You basically advance the timing, run it, and inspect the data log for ION sensing events (pinging). When you advance timing too much, fall back for those driving parameters. To do timing better, you need a dyno for power feedback and you need to know what you are doing. Many tuning pros have built up the experience needed to tweak timing quickly and for the best street results.

You get a lot by fixing the VE and AFR tables, but if you want everything you need to tinker with timing.

Oh, the starter maps for these device start with perhaps a better timing curve than the one you get from the factory, so timing may not be bad as you think. The more performance mods you make, the more you need to be concerned about the detail. Basic Stage 1/ Stage 2 stuff is OK, I think.

 

That may be the issue. The Street Approved version is not the one you want, it is much more restrictive on what you can adjust and how much.

I have the "Race Tuner".

 

You are looking at the PC III EX which is an EPA legal unit with limited tunability and I would not recommend it. I would recommend either the PC III USB (we sell it as the Fuel Moto EFI Tuner by Dynojet) or the PC-V and both will give you full adjustability and are very easy to work with. We very likely have a very close map for your setup if you let me know the year and specific model of your bike as well as your mods.

 

Well you guys have given me some good stuff to look in to (which I have started already doing). It appears that each camp likes "it's choice" but I did find a few that left had a PC and then later installed a TTS, something about throttle lag. It almost sounded like that guy was sold a street version that I was questioning. Anyhow I am currently reading on the TTS website, http://www.mastertune.net/HD_master_tune.html. But ! I also found a few interesting old posts on this subject from this forum and another forum, that I will paste a couple here to share with you guys. Some interesting facts.
found these old posts on EagleRiders http://www.cvoharley.com/smf/index.php?topic=45883.0
[ I finally broke down and switched from the PC-V to the TTS Mastertune. I couldnt stand the fbw throttle lag any longer. What a difference. It feels like i have throttle cables again.]
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[any HD dealer can use TTS Mastertune. Any dealer that has been installing or working with HD bikes for the past several years has already been using Mastertune, only under a different name. The previous name was SERT, or Screamin Eagle Race Tuner. Our product was sold/installed through HD dealers from 2002 - 2008. They may not know the name but they already know the product.]
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and old posts by others on HD Forums at
https://www.hdforums.com/forum/elect...r-tuner-2.html
[Originally Posted by FLHXXHLF, Now that makes sience. If you dont have the avalability to have a dyno done, then TTS is for you. I would like to see a system come out that tunes your bike while you ride. No more dyno crap. I wonder if thundermax had done that yet?]
[Reply: Both Thundermax and PCV with auto tune attempt to do this for a price. Good theory but technology for the street is a compromise (sensor accuracy for one) and is not there yet. In practice it seems the auto tuners do just about as well as the average owner using a TTS tuning kit with with less fuss and $. I hear of several TTS owners that carefully followed the V-Tune instructions, then took the bike to a dyno tuner only to be told the tune was spot on, no improvements offered. You can get into more esoteric tuning with any tool (some provide more buttons to adjust), including timing, for which you do need a good understanding of EFI to be effective (and perhaps a lot of spare time on your hands). Those pros that race, tune more to EGT to get as much heat (power) out of the fuel for the track time and quality race fuel without burning valves or pistons. Track and street tune have two very different objectives, I think. On the street you don't have as consistent quality fuel and you need to be able to run for hours without issue over varying temperature and altitude... decent mpg is more of a consideration. So I think it comes down to what works for you, most riders can easily get a lot of riding satisfaction with a TTS do it yourself tune. If you only care about seat of the pants power and torque, I think many of the PC and fuelpack solutions would satisfy.]