[Thermodyne]

Do you mean a Twin Tuner by Daytona Twin Tech?

If so, you'll need to use the Twin Scan kit and a set of wide band exhaust sensors to sort it out.

 

[Thermodyne]

Yea, the twin tuner (was already on the scoot when I picked it up).
I fingered as much, or take it to a dyno shop to get it proper, but was hopeful that a member as done this kit.

I have the hardware to connect I to the computer, guess I’ll be lookin into there o2 sensor kit to finish it up.

You need the 02 sensors to see what its actually doing as far a fuel mix. And then you can make some changes. A dyno pull will include reading the exhaust gas, and as long as it has 18mm bungs in the pipes, would be part of the package. They sell an updated system that auto tunes itself. But before I went that route, I would just swap it out for a Thundermax.

 

[Thermodyne]

Had one 15 years ago on my own bike. A big learning curve and that said despite getting it all dialed in missing when compared to the Delphi was any form of detonation control and load based spark curve. A speed density system, so throttle position and rpms control spark advance. The Delphi is Alpha-n and uses MAP pressure plus rpm and temperature plus time inputs to adjust the spark. In a performance motor, when the tuner has the ability and understanding to tune this system, it is far superior. Why? Load is taken into consideration. This feature allows running higher static compression without the effects and in a rare case when the motor pings the Ion sensing will pull timing out to protect the motor. Neither the Daytona Twin Tec or the Thundermax have those features.
My 2007 Streetglide had a 107 with 10.5:1 compression and a reasonable 47 intake close cam. Cam was recommended for up to 11:1. Bike pinged while traveling at cruise speed 2700 rpms about and up slight hills. Could I fix it, yes. Pull timing then the bike lost the responsiveness on flats and overall ran hot. Best thing I ever did was pull all that junk off and put the Delphi back on and have Lonewolf tune it in Nanaimo with a TTS. Ran cool and was super responsive. Got rid of a software glitch in their system too that made the bike high idle after a gas stop. Super annoying.

Ummm, I think you switched it up on the fuel control strategies.

Delphi as applied to Harley's is speed density. The fuel maps will show fuel based on rpm and manifold pressure (MAP)

Alpha -N uses throttle position in place of manifold pressure. So the maps will show fuel based on rpm and throttle position. It makes good power, but wastes fuel at light throttle pressure and is very EPA unfriendly.

The big advantage of speed density is fuel economy and low emissions. But it is very poor at making power. Most performance tuning systems convert it to a hybrid delivery strategy. Biasing throttle position over manifold pressure.

It should also be noted that while only the Delphi is equipped with detonation detection, it doesn't work very well for twin cam applications. And was really just there to appease the EPA. That spark ion bull **** was abandoned by the auto industry over 10 years ago, only Harley stayed with it, and even they abandoned it in 2017.

At some point, Harley will be forced to move to mass air on the injection systems. And there is no longer any reason not to as far as packaging, the sensor package can be smaller than an 8oz coke can now.