There are several reasons why, in my case, I did not install an alcohol injection kit.

Injection is the way to go for the hard core 1/4 mile racer where heat soak can cost you 3 - 6 tenths of second and the trophy at the end of the day.

BUT - My research showed that alky/meth injection only lowers IAT's by 30 -40 deg F and I've already achieved close to that with my new IC tank - (but granted, not after the fifth 1/4 mile run of the day)

While the proper meth/alky will increase the octane level - I could find no hard numbers or (R+M)/2 testing that would say "by how much". Numbers varied between websites, author and retailer.

Unless you add a big **** 2 gallon tank in the trunk - you only get about eight to ten - 1/4 mile runs. Not near enough for a road/canyon warrior like me. (bikecop could chime in here about his system) for on and off the throttle driving - and injection kit just won't work.

If you don't have knock or detontation issue - an injection kit offers very little gains. If you do - then this (or higher octane fuel) is one solution.

But most importantly - I still have close to two years left on my factory warranty - My dealer is ok with the mods I have done and has no issues with the bling - add injection kit (Alky/Meth or NOS) and I can fagetaboutit.

There were other issues like lost lubrication on cylinder walls, alky/aluminum issues , etc...

So in the end $15 - $20 more at fill up does the trick for me and provides a whole tank-full of fun no matter where I'm at. When that little ricer, or Stang pulls up next to me, gives me "the look" and rev's his engine, I don't have to roll my window down and say "I just ran out of Alky - can you help a guy out?"