One more thing (and I'm sure there'll be more later):
Is it really okay to use your timing maps as they are? Do you have a similar build and cam to mine?

 

Answered questions in order.

1. It's a bit of everything as to why you won't get 40 mpg.. You actually might get it or get close to 40 because you have a light bike without a fairing.. But the reasons are multiple.. A: You don't have enough compression for that cam.. Increasing compression will help. B: Tmaxs won't get the MPG of say a PV or TTS because the fueling and timing are TPS based in the tables and not MAP based.. You should get to within a MPG or 2 if you get everything right. There is no difference in how the Gen 2 (Legacy) system works in the aspect to Gen III (current). Regardless. You should be able to improve mileage from what you have now. I really don't know what it will end up tho..

Tmax uses wide band sensors that measure ARF between something like 11 to 1 up to 18 to 19 to 1.. They can be utilized anywhere in the power band.. What you described is how a flash tuner works with a narrow band sensor. Narrow band sensors only work in a narrow band, something like 14.7 +- 0.1 afr..

2. Upping the motor to 107 would be fine with the your current version (gen II) of tuner.. Tmaxs work better with more compression.. Going to 107 will increase CR to where it should be.. I have a 95 ci FLHRC with the compression set to 10.8 to 1 and a cranking pressure of about 220 psi (yours is probably about 170). It gets 38 mpg in town and 40-42 on the highway.. It's a heavier bike and pushes a windshield plus I typically don't baby it.. It runs a Gen 2 system just fine.

Note: the biggest difference between the Gen 2 and Gen 3 Tmaxes are minor (IMO). In fact from what I've seen Gen IIs start quicker. Less cranking.

3. I would simply run the IAC calibration mainly to get rid of the error.. You may get the when you mess with the ignition timing. It does not have any effect on what you do for tuning.. On Gen 3 systems they removed the calibration procedure. (one of the changes between Gen II and Gen III)


4. Note it's injector timing not pulse and yeah you are right.. Looks like they allow users to change that value now.. Probably the last Software update.. It used to be that you had to have the advance license. Before that you had to send the map to Zippers to change the value..




You can try the timing from the map I sent you.. It should be OK. It's a lower compression build (185 ccp) in a heavy bike. (Tho not as low as yours which is about 170) I don't know if the motor will ping or not tho as the bikes are a bit different. Don't use hotter plugs tho or if you do and you get pinging, go back to stock heat range first.

 

bwoltz, I'm with you he needs a new map plus try your timing... did you also provide the 'Ignition Timing Maps' sub-map 'Timing vs Engine Temperature' ?

With a new map he'll get all the newer mapping, like injector timing and your timing is more than mosts if not all TH maps.

 

Thanks, b! That answers most of the questions I had, for now. And since you think my Gen II unit should be fine for the time being, I think I may have to consider that 107 upgrade more seriously...
A new T-Max unit, plus a new Windows machine to run the latest software and link with it (I prefer not to run Windows virtual or boot camp on my OS X machine) will cost me about the same as the 107 kit from FM...

 

Your 95ci story brought to mind another question:
Could another workable option to bring the compression up be to have some head work done while keeping the stock displacement?

[QUOTE=bwoltz;15457474]
2. Upping the motor to 107 would be fine with the your current version (gen II) of tuner.. Tmaxs work better with more compression.. Going to 107 will increase CR to where it should be.. I have a 95 ci FLHRC with the compression set to 10.8 to 1 and a cranking pressure of about 220 psi (yours is probably about 170). It gets 38 mpg in town and 40-42 on the highway.. It's a heavier bike and pushes a windshield plus I typically don't baby it.. It runs a Gen 2 system just fine./QUOTE]

 

You could mill 0.060 off the head, and use a thinner head gasket and bring the up to about 10.2 to 1.. Another option would be to fit domed pistons to the stock bore.. I not looked for domed pistons for a 96 ci motor.. If you mill 0.060 off the heads, you'll want to verify valve to piston clearance which may require cutting the piston tops to clear the valves. Also once you mill the heads, you'll have too much compression if you bore the cylinders for larger displacement. You could simply only mill say 0.030 off the heads and use a 0.030 head gasket and get about 180 psi.. cranking pressure.. It will help.. How much.. Don't know.. MPG or 2?

Either way to get any mileage you need to play with partial throttle timing to get the best mileage.. Adding compression only gives you the opportunity to get better mileage.. Motor still needs be tuned properly.

 

Subscribed, Been watching this Here and at HTT. Have my own MPG and Timing probs. with new cam install. Gaining a little insight to timing now. Thanks, I will keep watching.

 

Okay. All good things to consider. Thanks, b!

 

Hey b!

Here's the latest on this.

 

Good.. Sounds like you are headed in the right direction.. Give it hundred miles or 2 to let the Tmax adjust the new map and go from there..

Look at this thread for ideas..

https://www.hdforums.com/forum/the-d...ming-help.html