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    Thread: Water vs Methanol : Ultimate Tuning

    1. 06-03-2015 04:08 PM #1
      Finally I got a map tuned with the right ignition timing and fuel mixture.

      Now I would like some advice to have a good tune with a 50/50 mixture.

      Question 1 :

      Would water only or a 50/50 mixture need more ignition timing ?

      Question 2 :

      Methanol is fuel, so the map needs to be leaned out. By how much? is there a formula for this ?

      Question 3 :

      Water cools combustion more than methanol but if both injected there is a note that water nor methanol do not "see" each other thus mix more with air.

      So what about Air Temps? Would using a 50/50 mixture gain cooler air temperatures but increased cylinder temperatures due to methanol burning?

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    3. Member
      Join Date
      Apr 14th, 2010
      Posts
      387
      Vehicles
      Audi TTS APR Stage 3 GTX2867R, Q5 3.0T
      08-06-2015 09:37 PM #2
      Quote Originally Posted by parmas View Post
      Finally I got a map tuned with the right ignition timing and fuel mixture.

      Now I would like some advice to have a good tune with a 50/50 mixture.

      Question 1 :

      Would water only or a 50/50 mixture need more ignition timing ?

      Question 2 :

      Methanol is fuel, so the map needs to be leaned out. By how much? is there a formula for this ?

      Question 3 :

      Water cools combustion more than methanol but if both injected there is a note that water nor methanol do not "see" each other thus mix more with air.

      So what about Air Temps? Would using a 50/50 mixture gain cooler air temperatures but increased cylinder temperatures due to methanol burning?
      There is no right answer, you will have to find out with dyno time.


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