Assistance With The SERT (BaggerP)

I think it's great to learn all about them and how they function gives one a better understanding of what is going on. When the Jerk tuner did my race tuner he did not set it up correctly and he was trained. Learn all you can about them but I still think using a Dyno will get you closer. The guy who did mine only spent half an hour on the dyno. So probably just dumped a canned map in it and called it good.

With these tuners you have multiple map options
best thing to do is fine one close to your build with a cam
close to your cam that is the one you try first go for a ride
if the bike seems to run well then go with it and start tuning.

First thing to tune is the cylinder VE table which is volumetric
efficiency of the cylinders. The older way with SERT and SESPT
on older bikes was RPM/TPS.

VE must be set on each cylinder first, you do this by setting the AFR tables
to a specific figure that causes the 02 sensors to run in every single TPS/RPM
position. As you ride the ECM data is sent to the PC (put in backpack, tourpack)
and get at least 30 minutes ride in, uphill, down hill, don't got WOT runs, as once
you get above 83 KPA the software ignores the data, it's not typically reliable.

You will get a results map and it will show you each cell you hit and if you got
enough good hits to fill the VE for that cell, typically three good VE data runs will
do it. It is an advantage to have a remote monitor on the bars to watch the graph, you can pretty much do the map like a dyno operator in one or two full rides this way

A 7 inch usb powered monitor for about $80 on Ebay or Amazon does it, or you can even put a wireless access point/hub in the tour pack for about $30 and use a Droid or Iphone or Ipad to wireless transmit the screen to it and watch. I use a 7 inch Dimo usb monitor on a Ram Mount.

Once you get the ve done, the software will merge the data and optimize each cell for each cylinder. the Tmax does the same thing only you never get to see it and you have no idea what cells it's hitting so you can't ever get all the cells done as quickly.

Now that the VE cells are set the maps AFR targets will be accurate, until the ECM has the right VE the AFR is off as the ECM doesn't have the right target VE so it can't hit the AFR. The two are linked.

Next you can do data runs, this will obtain other data such as spark data, it will show you where the HD Ion sensing system is expecting (that doesn't mean knock occured it means it THINKS knock is going to occur) knock and starts pulling out timing. So you go into the timing table at that data point, say 50 kpa 3000 RPM and pull out 2 or 3 degrees of timing.

HD Ion sensing will pull out as much as 7 degrees of timing when it kicks in killing power, sometimes it's just as little as 1 to 2 degrees of timing that needs to come out.
so you kick the timing in that area back a bit and go run it again, if it doesn't happen again you've optimized the timing and power.

Lots of other things in the software you can work with but these are the basics, SESPT is similar.
BTW a good VE tune and a data runs typically get within 5% of what a dyno operator will get
for the same tune area. Now some things you can't do on the street that you can as easily on a dyno
which is put a load on the engine to hit some cells that are not easy to hit riding.

It's not as important as many people think because, if you cant hit that cell to tune it you
are not going to hit it when you ride so it doesn't matter that you don't hit them...

For a basic build like filter 103, 255 cams and Fullsac x header with slip ons the map
you can get for that build from Fullsac dyno tuned when you purchase the TTS and pipe from them a free $300 dyno tune map. Then you just go run the VE's to make
sure your ve's are set, and it will be close do a data run for knock and then you are done very quick.

TTS is quite powerful but not complicated and one of the best tuning softwares out there, IMHO you should download the TTS software and manual as well and learn it, and then make a decision between the two applications. SERT was made by TTS until they decided to split with HD and go on their own and its way past SESPT and easier.

For example TTS now has a cam selector, you can pick a map, then put in your cam profile from the manufacturer and it will use that as it's decision on when to fire injectors based on valve opening time.

The newer bikes, which an 11 sedonna will be, use Lambda tables vs AFR and it's simpler as it eliminates some of the other tables from the previous years ECM.

My point was that both the old SERT (Now SESPT) and TTS operate the same...

They are tuning the ECM - and the ECM works the same regardless of the
tuning package,

Like I said learing and understanding how both systems work is great and good knowledge. However my stage 2 Harley download works fine. I don't feel it is any different than buying a tuner and playing with it to find the right tune for your bike. Is it close, yes, is it perfect, no. but, I'm out riding and not having to mess with it all the time. Rode it all over back east on my trip, bike never went into overheat mode in all that extreme heat back there. Somebody like Baggerpaul who is well trained and has years of experience using them I can see getting a close tune with one.

Sent from IPhone

To some extent,

No VE, basic building blocks VE cells are the air capability of the engine at any given
RPM for any TPS (throttle position) Now if you get an 10 or up you no longer tune by TPS but by KPA, which is better (Pressure) per RPM... It's more accurate, and the ECM's now work that way.

There are times when you get into wild builds or some guy that's put Eddy's heads on Bobbys Cams with Tommys Pistons and Earl Bobs Special pipes along with Einstiens Coil you know they read the boards and think everything is golden when they read it, (same people that think Obama does well because they watch MSNBC only) , anyway, when this combo gets going along the VE tables max out in specific areas.

So say you have a 110, and have done all this work, and when doing base VE runs you
find a lot of cells maxing out, IE the system is seeing more there than the tables can allow, You can go into the setup table and change it from 110 to 120, then go back and do the runs. What this does is let the sofware read the actual efficiency, and then
it's capable of getting numbers in those specific areas that fit what the ECM wants to see.

Actually the injector on time is determined by settings in the map
based on cam selection, it's one of the new features we (HTT) beat on TTS for
was the ability to modify the map cam position, this makes more maps
available.

You can dial in the cam open, close, lift, duration etc, so the injector firing
is done precisely at the correct moment.

As far as I know SESPT doesn't have this feature, among others...

Yep you can change injector size as well...

but for the basics as JB is doing a 103, stock cams heads and pistons,
a set of pipes and filter it will be a simple download and VE tune...