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Originally Posted by tommyglide  Hey Vryquick, I'm curious as to your thoughts on Thundermax with Autotune, which is what I am using. I'm planning to learn how to adjust it but for 8000 miles its had no glitches. |
Thundermax is very complex but is a very good system. Like any other system, it has to have a base map. The closed loop system can adjust the mixture as long as the mixture is within the parameters of the oxygen sensors.
The "wide band" O2 sensors can operate between 0-5 volts. Basically the
O2 sensors produce their own voltage (0-5 volts) according to the amount of unburned fuel that is in the exhaust. If the amount of unburned fuel is more or less than the O2 sensors can sense, it still can only produce a min. of 0 or a max of 5 volt signal to send to the ECM. That is why the base maps are provided and is also why the base maps can be manually corrected. The
T-Max system has a built in auto recorder that records and plots the mixture and will tell you if the parameters have been exceeded by looking at the plotting graph. The base maps provided will get you very close. T-Max & Zippers usually has a support team at major bike rallies. They will look at your recorded plotting graph and fine tune the system for you for a reasonable charge.
The Thundermax works extremely well on common engine builds. Their support techs. keep an extensive library of base maps. It's only engine builds that they have no map for that creates a problem.
Another problem is that very few tuners have had experience with the system and they don't understand how it works. Basically everything about the system is completely different from SERTs and PCs. Since Tuners don't understand the system, they say that it is junk.
Again...It's a very complex system but once you understand how it works, it's one of the best systems available.
I don't care for their nitrous system. I have installed one of my nitrous kits on a customer's bike and he has the T-Max system. He gets around 50+ mpg when cruising under 60 mph and the throttle is smooth all the way through the rpm range. I installed very large injectors to compensate for the nitrous, so I had to modify the base map extensively.
I hope this makes sense. Here is a dyno graph of his bike at a local HD Dealer dyno shootout.
Here is a picture of his bike.
Here is a link of a video that has the bike in it before nitrous was installed. He had 113 hp / 113 tq.
After this shootout he had to have nitrous. Notice how much quicker my bike (with nitrous) tachs up vs his bike w/o nitrous.
BTW I was only using a .030 nitrous jet at the time.
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