Well, the "Roo16" looks like it is our "Q16" in the USA.
Personally, the cost of the fuel is worth it for huge power and more aggressive tunes. Yes, it is expensive -- Q16 is ~$75.00US for a 19L pail. VP Import is ~125.00US for a 19L pail. I have a 60L fuel tank in my Eclipse -- you get the idea how much it costs for me to fill up!
As an alternative, have you thought about methanol injection in conjunction with your pump gas? A simple meth injection kit can dramatically increase your power levels -- especially when spraying 100% methanol instead of a 50/50 mix. A single nozzle setup at the throttle body would be more than sufficient to get some solid HP gains. It may not be as much as you would see on 100% VP Q16, but it would be beneficial for sure.
As well, VP Q16 is an oxygenated leaded race fuel -- any oxygenated fuel will be corrosive to some level -- its not as bad as you think. I leave my tank filled with race fuel for 6-8 months at a time. I just use stainless braided fuel lines, and quality injector O-rings, and use stainless steel fuel filters.
If you are going to switch to E85, you will need injectors closer to 1000cc's to capacitate the same volume as you currently use on your 780cc injectors on pump gas to produce the same amount of power. To capacitate 25% more power, you will need a minimum of 25% more fuel injector, resulting in approximately a 1250 or 1350cc fuel injector. A good candidate for this would then be the FIC BlueMax 1250 or 1350cc fuel injectors.
Your fuel pumps are capable of handling around 1000HP on race gas (C16/Q16/VP Import), and around 700-750HP on E85. You will be able to hit your power goals on E85 with larger injectors and stainless or pushlock fuel lines and quality fittings. I would recommend having your fuel rail anodized; or purchase an anodized rail. The cast aluminum will corrode the quickest when compared to your fuel lines or fuel tank.
If you use methanol injection on top of your current fuel setup, you will be able to get more out of the vehicle while reducing your injector duty cycles because the methanol you inject will cool the intake charge, and create a more efficient combustion cycle -- all while producing more power, and giving you the ability to run more aggressive ignition timing maps.
They all have their benefits, and it is up to each person to decide which direction that they want to go.
Please understand that there are alot of misconceptions about these exotic fuels and injection methods, and most of the rumors are from people that have no experience whatsoever with these methods. It is best to do some research, then choose a method to try and then gain experience first hand.
Good luck,
