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Message: [QUOTE="TARM, post: 53731, member: 578"] How do you accurately adjust tuning ( SOI,PW) for the addition of a un-metered un-regualted fuel? Its not like this is being precisely metered to each cylinder nor i to the engine as a whole. The amounts being prayed in varies greatly from system to system, motor to motor, etc.... You can delay SOI etc but its just a general guesstimate to hopefully reduce the stress but I can not see how it is in anyway precise? SO here we go thru all this trouble to live tune, jump on the dynos to get things right, further work on the road etc. all to get the tuning dialed in as precisely as we can possibly get it. The fuel when how much the pressure, for the air the temps the loads etc. Then we go and add some secondary fuel just sprayed in there into a tube without any real precision whatsoever to gain 15-30hp. What was the point to all that previous work then if now you just have to take some guesses to change things to hopefully prevent cracking pistons and valve faces? Also does not delaying SOI tend to reduce fuel only power? So then how much over all is really gained? @ steps forward one back deal? I think I would stick with water with some water soluble machine oil for lubrication and maybe additional chem as anti freeze in the winter only if needed. [/QUOTE]

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