Most of the mfgs see this stuff on the site. many are members. But really, people, complaints get posted on websites, and anytime someone gets either unlucky or irresponsible with a power upgrade, the forums are usually the first to hear about it. It can happen with Banks, it can happen with any of the fueling boxes. What I read here and in other places doesn't tell me a thing about Banks. it tells me that someone is either unlucky or irresponsible. or both. If there is one thing that TDR members have no excuse for, its this: you are your own warranty station. if you play you pay, and any number of similar expressions that pervade the site and the physical magazine.
Perhaps we can fault some of the manfacturers for creating a false sense of security about warranty claims. you gotta learn how to interpret and read past the glitter. Those disclaimers that come in the box are for real. I don't mean to take away from anyones personal experience, believe me. Its just that if you've read more than a weeks worth of posts here, you have to know.
Behind the glitter is a few realities:
1. yea magnasson/morse or whatever it is warranty act. its real, and says that the truck mfg has to prove that an after market product caused the problem. sounds good in fine print but the reality is that they can and will deny warranty coverage anytime they jolly well want to, and you are faced with the uphill legal battle to prove your case. the warranty gods are out to protect the mother ship, not you.
2. yea, a box mfg can "stand behind" their product. But they can deny support by simply noting that the engine could have failed without influence from the box, and that the box was not at fault.
For the most part all of the mfgs I've worked with are trying to produce a product that works, and most try to educate buyers regarding responsibillities. some more than others of course. I bet if truth were known, the engine failure rate with Banks boxes installed is no more than with any other aggressive pressure box installed. There are a lot of horsepower enthusiasts out there with much more aggresive boxes and their trucks are going strong.
there are a few ways to mitigate risk:
1. just because you throw on an EGT gauge doesn't mean everything is cool. understand what they read, what sources of error are, etc. Some of the EGTs reported on the new stock trucks make my eyes pop out and I wonder why anyone would add more fuel without really understanding the whole system better.
2. Before you throw away a new truck warranty, consider waiting 20,000 miles or more for it to break in before you add fuel. The sooner you add power, the more confusing it will be to determine if the cause of failure is the box or the truck. If there is a mechanical vulnerability in the engine, you'll only mask it with an upgrade and give DC the right to back away from it. Depending on a number of things, note that people have reported fuel economy improvements as late at 30,000-50,000 miles. dern engine is just barely broke in at that point if you're not towing. especially for the first few thousand miles, internal (instantaneous localized) engine temps are high due to wear-in.
BTW, Banks timing cannot differentiate between cylinder banks or control one differently than the other. Timing advance is accomplished at the crank and cam sensor inputs to the ECM and the ECM is time-fooled before any of the downstream injection hardware is involved. The ECM and bosch injection system is what fires the injectors and has hardware capable of differentiating between the two cylinder banks.