Not that I was aware of, I did a lot of research before buying. It's funny really, all I did was 2 step colder plugs to spray that much. I have pics I will post when I get home. The viper motor is just a big pushrod motor that is pretty bulletproof. Stock the AF ratio was 10 flat at WOT, on a 125 shot it was still low 12's. They are so conservative10 flat AF is stunningly rich. So much so that it should melt cats down inside a few weeks. optimum efficiency is 14.7, period. Not at WOT it isnt. Yes at idle the A/F will fluctuate up around mid high 14's. But under full load that would be WAY lean and damage the motor. Most vehicles will idle lean up in the 14's, no need for fuel with no load.On a Naurally aspirated motor 13.0 at WOT is Ideal. In a Turbo or SC car then you want to see no higher than say 11.7-11.9 or maybe touch 12. If you are going to put "period" at the end of the sentence at least give correct info so a newb doesnt listen. If you tell a tuner to make your AF ratio 14.7 you WILL be replacing the motor when massive detonation occurs!!! here is my old all motor 347 Mustang dyno with a damn near perfect tune here is a breakdown of it, notice the A/F stays between 13.2-12.8 I missed WOT, but as someone who spent several years tuning boosted cars I would still venture 10 to be rich. We found better performance without any real short term reliability issues at 12 and better. Of course, most of our tunes were on straight track cars, not street cars looking for long term reliability. Turboed cars like to run on the lean side. Our cars would run a season or 2 and be torn down and gone through. Failures were extremely rare. My GN ran roughly 12.5 on the street at 18 pounds all day long (I did shoot ethanol). At the track it was fattened up a tad and was turned up to 24 pounds. I went through trannys like crazy but never had a motor failure. Seth, what are your thoughts on water/meth injection? I think I asked before, my only concern is water vapors contributing to increased cylinder pressure. It's probably moot point though. Depends on the application. The water will separate into hydrogen and oxygen. Oxygen is a requirement for combustion . The methanol also adds to the benefit. It burns slower, and quite completely in a combustion chamber. Essentially it increases the octane rating by controlling the burn rate. I stress essentially because that is not a literal explanation but it simplifies thing. It allows for a better timing curve and increased boost without fear of pre-ignition. It is a win/win. You need to be sure it is a quality system. Progressive systems are worth the extra money. A straight shot can created flat spots in acceleration. In some cases if tuned incorrectly it can create a dip in overall top end performance. A good adjustable map is important. Not that it really matters, but I don't think water contributes either hydrogen or oxygen, just cooling. What's the range of temperatures in a cylinder (generically speaking)?
