I had a Thundermax and autotune on a 2008 96" with 2:1, AC and 204SE cams. It worked great and I found it was easier to get better power gains with, not as easy to get as good economy but not a great deal in it.

Are your ACR's working and enabled in the software? Like yourself at the time I didn't know much about tuning. Since then I have had a bit of experience tuning with Power Commander, TTS Mastertune, SEPST and SERT.

The TM system is sort of like the older Alpha N system as is Power Commander (RPM, throttle position maps)

The other ECM adapter systems are used to modify the stock speed density ECM maps, I believe. I don't know enough to explain it completely but the Speed density is more complex with regard to fine tuning the mapping.

Getting back to your problem, it is possible you have a crook O2 sensor. This is certainly worth checking. Do a youtube search on testing O2 sensors.

You have to make sure you don't get any grease or forign materials on the O2 tip or other end when using antiseize etc to install.

I have heard of problem O2's from using too much grease on installation.

cheers Bluey, I have had a few PM's on this and got a lead on a shop that sounds as though they know what they are doing with the TM. We reloaded the map again and it went well yesterday as it has previously when the same map is reloaded. Just seems to deteriorate over a few weeks and then gets progressively worse.
Acr's are ok and must be functioning as the starts were real good on Saturday all day even when hot. Did notice it was running a bit hotter as the day went by.
all info and suggestions are appreciated and we will see what we can do to sort it, a dam nice bike and I hate to see and hear it running like crap.

Good luck bloke, I wish I had a good memory.

I just had a quick look at the TM software, have you had a look at your front and rear fuel /TPS RPM maps to see where the maps are being changed. This could indicate where the problem lies. The offsets are in yellow I think and remain on the maps until written to the map or removed.

well after much stuffing around finally went back to the stock ECU, instant difference for the better, start up is instant every time hot or cold, idle is spot on, much smoother and way less popping on Decel, all dash functions are back, definitely doesn't pull as far into the rpm though. Now it feels like a nice bike to ride BUT

It could use a tune and a little help so a nice BOLT IN cam would be useful any suggestions

I was almost going to suggest getting rid of the thundermax altogether but thought that mightn't be positive or helpful to you. You can't beat the features and simplicity of the factory ecu. And then have the best of both worlds by flashing a tune to it.

cheers hilly I will add it to the list
TC24D, Genesis 577, Andrews 57, TW777 although some of them would like a bump

Fat I have been trying to convince the owner to go stock and flash for a long time, when he finally agreed and rode it today he couldn't believe he had waited this long. It does need a tuner for sure but at least now it rides like it should and he can again enjoy it.
No doubt the ThunderMax works but this particular one or setup just made the bike a constant pig unfortunately.

That is a shame you couldn't get the TM problem sorted. I have a TTS Master tune on my 96" Softail custom, it works well. I have a SERT on the CVO Ultra with true duals, all else stock, it also works well.

The SERT is very similar to TTS Mastertune but with less features. Steve Cole used to make the SERT for HD, he now calls it TTS Mastertune and has developed it into a very good tuner. In my experience I found TTS Mastertune has much better support than you will find with other brand tuners. I have had Thundermax, TTS, SERT and SERF, I have also tuned friends bikes with SEPST and Power Commander. I found Thundermax the easiest to use and TTS a close second but with better final results. I don't have a dyno and can only do the basics.

The CVO 110" engines have SE255 cams stock, they are high lift short duration early intake close cams. A good cam for low and midrange in heavy bikes. I have a couple of friends, one with a CVO springer and one with a CVO Fatbob, both of them changed the cams to SE260 and an S&S similar cam. I don't mind the SE255 in the ultra and wouldn't bother changing them, but if it was in a lighter bike I would look for a better cam.

The SE204 cams In my Softail are great with the 2:1 and Hypercharger. The power is strong from go to very near 6000rpm. I don't know how they would go in the 103" engines but in the 96" there great.

thanks Bluey

first job is get some descent brakes on it, I did a post about this a while ago asking for advice and ended up just putting Lyndal pads in which helped but not enough, owner has now accepted that if he wants to keep the bike it needs some updates.

The bike is almost flawless with only 2 marks on the underside of the lower frame rails from a lift, not mine it has rubber on it and a small rub mark on the fork, otherwise it is perfect.
So some P&M brakes or similar what ever takes his fancy then we can do cams and get it tuned nice.

Hilly your right, those Feuling 574 do produce a real nice curve on the stock motor from those charts and not just 1 chart either, I think they would be hard to beat as he does not want to open up the motor,  they would put him in front of all the guys he rides with which will keep him happy, bar 1 . thanks for the tip.

Told him he has 1 month to sort it or wait for another 2 months so I can build mine, Hopefully he will stop procrastinating and I can get into it over the  next week or 2.

 

Thanks for the input guys, much appreciated

Had a Thundermax Auto/tune on my 2010 Fatboy Lo since new, never had an issue with and its still going well

Rocky I have no doubt they work well after all there are probably millions of them out there. Just this particular unit on this bike has been an issue since new and no one seemed to know why.

Yep Hilly life is pretty good right now, funny how recovering from serious health issues will give you that new perspective.

 Reference more:

double post

Yes , the old troblesome Thundermax systems

I've posted before now how I have removed them from 2007/8 bikes , and gone back to the stock OEM ECM

Various "problems" , as described here and speedo dropping out etc etc. Age related no doubt

Bit of knuckle skinning labour to do that , but it's worth it

I have used both original 2001 to 2008 SERT software , and more recently TTS software to flash these reinstalled ECM's

Dudes have always been delighted with the results , and 70K's more per tankfull is an added bonus

As for front brake upgrades for the FXSTSSE2 line , try the Yank CVO forum for good info

As for tuning your CVO now , try TTS BEFORE you change cams , worth a try and you'll "need" a tuner dongle anyways

My own 2008 CVO Springer runs very well with the OEM 255 cams and a TTS tune , as fast as any Harley I've run against to date

well I changed it back to stock ecu and immediate and improved difference. really good but still needed a proper tune.
Old mate Fred took care of it and now it is perfect. runs smooth as silk, much nicer to ride and does every thing you would expect it to do, shame they don't run like this new.
Can't remember the peak numbers but at 3500rpm it picked up 16hp perfect. I will have a look at the chart and find out.
Mate is over the moon with how good it turned out.
Stuck a set of Lyndal pads in it and now they have settled in it almost thinks about stopping. God they are shit brakes. Tried to convience him to go with a better set up but as nothing match the bike perfectly he wouldn't do it.
oh well we try.

What did " old mate Fred " do to/for it ?

Sorry if I've come into the thread a tad late.

Lyndal pads and careful bleeding should do it ( almost haha...)

Just watch that DOT 4 shit brake fluid around CVO paint.....

just a tune mate, it's all stock bar the stupid pipes
yep very careful bleeding
I always let him top up the master cylinder hahah
I just take care of the bottom end