[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: interesting source for intercooler cooling setup, other stuff
In article <9706242304.AA13943@mashtun.JPL.NASA.GOV>, in mail.Audi_List,
> I think there is one other reason to NOT spray water at the
> turbo end. Cooling before the IC decreases the deltaT and
> reduces it's efficiency. Spraying after keeps the IC operating
> at max Eff. The net result of spraying after should be a more
> dense air charge (cooler). If the dispersion and evaporation
> rates differ, that could negate this effect however. More ideas?
Your statement is perfectly correct.However,in real world tests,measuring
temperature at the engine side of the throttle body,it seems that in _most_
cases,injecting water into the inlet of the compressor gives a bigger temp
Maybe it is due to the good atomisation the turbo imparts? I too worry
about droplet fall out across the intercooler,but it has only once been a
problem,and that was on a vehicle with too long a pipe run,and possibly too
large an IC.
Having said all that,my own car (not an Audi),has the water injected after
the cooler,just before the throttle body.This was really for plumbing
reasons,as I inject fuel into the turbine side of the TC,in order to
minimise lag.(It runs a wild cam and huge exhaust valves,so I get lag after
coming off boost).