May 4, 2020 · Thundermax Tuning Help: 131" Jump to Latest 4.7K views 5 replies 5 participants last post by ANGRYRANGER15 Oct 17, 2025 D

Apr 29, 2023 · The thundermax maps were bit off from my set up but customer support said to go with one and run the bike. So initially it ran ok but rough/ spluttering at low rpms.

Oct 25, 2007 · Thundermax installation and tuning guide I promised to do some screen shots of the tuning screens, but found that this doc has everything in it. Here is a link to the pdf doc, the file was …

Nov 10, 2018 · The Thundermax is an excellent on-the-fly tuner that adjusts automatically. You might be able to dyno tune and get a little more out of it but I doubt that’s worth the money you’d spend on the …

Jun 5, 2009 · I plan on putting a Thundermax on my scoot later this summer and will heliarc weld a bunge in where it is not visible and then just plug it in. Also Matt told me that there are basic Maps …

Oct 20, 2024 · It has been a few years on this site. I purchased 121 VVT. Love the bike, but falls off way too soon. Any rumors out there of tuner options? I will not use the Thundermax. Heard that impact …

Dec 12, 2020 · As I dropped my Bike off for the 131" upgrade, I have discussed tuning/tuners with my mechanic. He said that he will use the original Harley tuner, that there is no advantage of spending …

Jun 7, 2009 · Thundermax is a replacement for the stock ECU, and learns on it's own. The ECU is unplugged and is replugged into the Thundermax unit. The "Level sensor" is the "Bank Angle …

Jun 14, 2024 · Installed the thundermax, going to ride for the first time. When I get back and write the learned fuel adjustments and all, how will me manually tweaking AFR and such affect the auto tune?

Feb 17, 2007 · My ThunderMax Map Here is the map I am using on my TwinCam 88, with V&H Big Shot Staggers and Stage 1 breather. Good performance with good MPG. I am getting the ThunderMax …