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[kid vicious]

hello how's everybody doing I have a  2004 harley road glide I'm trying to figure out  I'm having  detonation it seems to be when it's running lower Rs in 5th gear it is a5 speed tranny it has 97 inch S&S jugs Andrews 54 in cams upgraded 07 and up oil pump with tensioners chainThunderMax Auto Tune computer with the o2 sensors S&S with travel limiters lifters 2 in to one Thunderheader I'm probably for getting all kinds of stuff, newbie I've actually help do all the work on the bike thoughat with Huff so any suggestions would greatly be appreciated

[kojak]

You got a lot of stuff going on there. You said you helped with some of the engine mods. Has this been going on since you installed the thundermax or is it more recent? Are you running the bike under 2000 rpm?

[twinotter]

Despite the claims, Thundermax auto tune really still needs to be fine tuned on a dyno. Depending on the map initially installed, it could end up being lean in certain areas under specific loads. Bigger cams, porting etc will all make the afr's change enough to need precise tuning.
My buds TM didn't work great until it was remapped, and tuned on a dyno, felt flat, gave teribble mileage despite pinging at light loads all the time. Now it runs very well, gives decent mileage and never pings under load. Take it to a pro tuner, they can adjust fuel and timing to work with your engine combo. fwiw twinotter

[grc]

Despite the claims, Thundermax auto tune really still needs to be fine tuned on a dyno. Depending on the map initially installed, it could end up being lean in certain areas under specific loads. Bigger cams, porting etc will all make the afr's change enough to need precise tuning.
My buds TM didn't work great until it was remapped, and tuned on a dyno, felt flat, gave teribble mileage despite pinging at light loads all the time. Now it runs very well, gives decent mileage and never pings under load. Take it to a pro tuner, they can adjust fuel and timing to work with your engine combo. fwiw twinotter

       That's why I tend to make negative comments about the folks who sell "Auto Tune" devices by claiming all sorts of things that are patently false.  A Thunder Max requires that the base map be very close for the system to work reasonably well, and odds are pretty good when people make a lot of changes to compression, cams, headwork, etc., that the canned maps T-Max provides won't match well enough.

Unless there is some mechanical problem we don't know about causing the OP's problem, odds are a real tune is what's needed here.

Jerry

[Ridgerunr]

I tend to make negative comments about Auto Tune devices, myself. It's like a roll of the dice, using one.
 +1 on a "real tune". 

[kid vicious]

thank you guys for your responses I was beginning to wonder if I hit the right button just trying to get a hold of this whole forum thing yes it did start after we did the mods and I put the Thunder max on I'm actually thinking about going down and getting the stock ECM flashed to eliminate the Thunder Maxx to see if that's what's causing it do you still recommend getting the ecm tuned after having the map flash unfortunately I have to get a flash from the stealershipI've heard good things and bad things about this ThunderMax like we only paid $300 for the unit I have also had the tachometer drop out completely and sometimes I will catch it running under the RPM's it should be in fact that it is actually doing I'll be doing 70 and it'll be reading 2000 rpms and I'm in 5th gear it should be at 3000 and I'm wondering if this is the Thunder max as well thanks again

[Ridgerunr]

You'll need tuning software, and a dyno tune. SE tuner or TTS, have worked well for me.

[Unbalanced]

Would not have the ecm flashed that is a roll the dice move.   It's a generic map and may or may not work with your combination.   Find a tuner that is good use what he likes to tune with and be done with it.   If You can find a thundermax tuner great.  It's not a bad tool I just prefer manifold pressure and a knock sensor for the in case moments vs. alpha N tuning.   Not saying it won't work either but it takes more than just some fooling around with to make it right.


Sent from my iPhone using Tapatalk

[grc]

I'm guessing from your comments that you bought the T-Max used and just installed it as-is on your bike.  If that's the case, I have no doubt whatsoever that your problems are related to the T-Max.  You could have the bike tuned using the T-Max if you can find a good dyno tuner that will tune with it (assuming the T-Max isn't defective), or you could take the approach of just having the bike tuned with the stock ECM and forget the T-Max.  The first thing you need to do is find a good tuner with an excellent reputation, which isn't as easy as it sounds.  Then let him guide you as to the best approach for your situation. 

Jerry

[kid vicious]

no I got it from my buddy that owns a shop he just had it sent back from t-max he sent it back to make a sure everything was good with it and then I had him put in the closest map we could find he said something about contacting t- Maxx and having them build a mapany experience with that