I switched from running Rinehart True Duals and base map 393 to running a V&H Pro-Pipe and base map 391. The mileage with 393 sucked for me and I ended up leaning it out in the cruise range to 14.2:1 just to achieve an average of 40 mpg.

Here's the kicker, with an unmodified 391 map (target AFR appears to be around 13.5:1), I just got 42 mpg on the first tankful. I have no idea why, but I like it!

 

i'm running 391 with d&d 2 into1 on a 07 streetbob, my best was 43mpg on a slow ride with a large group. now i'm getting around 35 with the hammer down. i'm also getting a lot of popping and some backfire on decel. i've got over a 1000miles on the t-max and the decel hasn't gotten any better. it runs good on the throttle, but for a self tuned ignition i expected more. still waiting for the firmware when zipper's releases it.

 

I had a lot of popping initially (but then the map is for the Fatcat, not the Pro-Pipe, so I expected it). After several hundred miles now the popping is more of a gurgle, almost all gone.

 

i just got my laptop working wellenough todownoaded disk and updated software, so monday i'll link up and see if everything is working right. a friend of mine will have his new dyno up this week, he uses DTT on his builds and is willingto see whatthe tmax can do.mon. and tues. are my weekends, so i'll drop the bike off before i go back to work on weds.

 

Please post your dyno chart if you can, I'd love to see it.

 

When did TMAX go to a self-tuned ignition?

 

T-MaxdoesNOTauto-tune timing.

 

Stro1965 any clearance issues w/02 on the propipe ? I read on the true duals you have to bend the bung a little and also do you notice a lot more heat w/the 2into1? Thanks in advance

 

No, I was worried about this because I'd heard about the problem with the true duals. In fact, the bungs are aligned perfectly and are easy to reach.