Quote:
|
Originally Posted by djuosnteisn
...So in a high compression ratio, high boost system, best performance gains can be realized with a majority water mix, with only some methanol to aid in dispersion and manifold temps.
.
|
yes
Quote:
|
..why some would spray majority methanol mixes, unless they had maxed out injectors? Unless, since the methanol is more effective at cooling "on the way to the cylinders", it creates a far denser intake charge than water would, and thus net more performance gains?.
|
A denser charge yes, but not by much. A few percentage points at best in real life...
Maxing out the injectors is not that hard a problem to fix either, increasing fuelling is not that hard (compared to increasing the oxygen content!)
If your intake temps are slightly above ambient under boost (say 10-30C) , then there is not much to be gained by intercooling at that stage. You'll get a small density gain and some safety margin (from detonation)
If on the other hand your intake temps under boost are way over ambient (say 100C) then intercooling before the cylinders is essential. Even spraying water mist would have a serious effect in charge temps in that case. Methanol would help even more.
It all depends on which links are the weakest ones in your power chain.