Skull

The thundermax will let you do what ever you want, AFR, Timing, RPM, anything tuning related. All you need is a laptop, usb to serial port adaptor and away you go. Tune until ya get what ya want. The base maps you download are just that, base maps. They will do the job for most people. If you have the knowledge then the T/max will let you play with the base map to perfect it or you can zero all perameters and build a map from scratch.

The Auto tune part is what it says. By using wide band O2 sensors the auto tune module moniters the exhaust gasses and makes adjustments as necessary to achieve peak performance. You can set the parameters on how far the auto tune will deviate from your chosen map by percentage. You can also adjust how quickly it will "learn" by a percentage figure.

The difference with the T/max compared to PCIII and SERT is that YOU have control not the dealer or independant mechanic with a dyno. If you have access to a dyno you can run live tuning sessions with the t/max if you want. But as most of us dont we let the auto tune do its thing.

Heap more to talk about, if you have any more questions.

double post.................................sorry

Hi Skull/ all,

the FuelShot Gen iii does not require a computer or any special wires etc. The user can make adjustments on the side of the road if they like. This will allow you to adjust your cruise fuel addition, acceleration fuel addition, WOT Fuel Addition, Decel Fuel Addition ( removing pop), where in the load range the accel fuel comes in, where in the load curve the WOT fuel kicks in. All this is very straight forward to adjust. 3 simple buttons: 1 to sequence through the above modes, then an add/ subtract.

Some of the others may be able to comment on the ease of use..

If there are some serious engine mods (major capacity change, etc) then we can reprogramme the unit to provide a different fuel addition range to accomodate. We expect this will be the exception, but available if required.

I had a pc3 on my ride, and now run the FuelShot Gen iii and the bike runs better everywhere, not to mention the performance compared to other bikes.

Ultimately, many ways to skin a cat or a dog.

Cheers

Mick

Hi Skull,

it only adjust Fuel. Based on the load that the engine is seeing - eg 30% load in the algorythms load profile (inbuilt program) etc, the fuel will be added based on the setting. This can be adjusted up and down the load range to meet your tuning requirements.

It doesnt actually look at throttle position, rather the timing between pulses of injector and duration of injector on. This gets utilised by the program to determine what load the engine is under and then adds the appropriate amount of fuel based on the range settings the user makes.

hope that helps

Kind regards

Mick

Hi Surly,
agree with your comments for a static situation. But most of our riding is not static.
Your comment that you need to increase throttle is correct to maintain rpm for increased Load. But what happens at WOT? or Partial acceleration? throttle positioning does not necessarily define the fuel required. It defines what the instruction to the ecm is (and fuel mixture based on AFR settings etc)

Use this analogy:
if you ride in 3rd gear on a steep climb vs 3rd gear on a flat road, you still have the same range of revs that you pass through, but the load the engine sees will be different. This can be determined by the rate off acceleration of the engine. I.e. how fast it revs will be different.

So by monitoring the time between pulses of the injectors, and the rate of change of the time between those pulses, the load can be determined and accounted for. The amount of fuel required for the 2 scenarios will be different as it will be for different gears. This is the technology behing the FuelShot. It does not need to look at throttle position.

If the fuel added was the same as in the way the PC3 works (rpm vs throttle pos) then it would be a compromise as there is no adjustment for rate of acceleration. Don't get me wrong, we have used the PC3 ourselves and installed a heap also. We have found that there is a marked improvement with these units.


kind regards

Mick

Hi Skull,
In simple terms the thundermax and daytona Twin Tec units are full replacement ECMs with auto tune. These will adjust your fuel map over time and kms to suit the AFR settings you set up in them. Those with these units are better placed to comment on their nuances.

Kind regards

Mick

Hi Skull,
In simple terms the thundermax and daytona Twin Tec units are full replacement ECMs with auto tune. These will adjust your fuel map over time and kms to suit the AFR settings you set up in them. Those with these units are better placed to comment on their nuances.
Kind regards
Mick

Skull, to put it simply the T/max is a replacement ECM. It works on exactly the same principle as your stock ecm with the added advantage of being able to tune it to meet your requirements. You also have the ability to moniter your engine temps and time spent in what rev range and limiter hits whenever you hook the thing up to a computer. You can also clear any error messages that come up (after cheching the reason behind them of corse).

I'm not one to bag any other system, but having had a long had look at the other systems the T/max gave me the most flexability for long term use. A lot of people think that when they buy a harley that they wont go down the modification road, and most don't. So the piggy back systems will do the job exceptionally well. You seem keen on big mods down the track so as the bug bites and you start getting into changing things the T/max type systems allow you to go sick if ya want. KC (sorry for usuing you as an example mate) had a 883 and done the pipes and AC, so fitted a V&H fuel pac. Some months down the road he decided to go 1200 kit and went for a T/max).

Well think of it this way,

if you install your TMax and set your rev limit to 7000 rpm and over rev the engine causing probs, then its gonna get messy wrt warranty. The same could be said about running the engine lean.

If on the otherhand, the tmax is installed and the engine starts to leak oil, then the two are not related. There needs to be a link between the damage and the improvement to say that the improvement caused it. It also depends on the dealer and their perspective and opinion...

cheers

M