sdminus

Hi

I have a small question about air charge temps. I ve always been of the understanding that the idea was to try and get the air charge temp down to or as close to ambient air temp as possible. How ever i have been looking into a co2 spray bar for my fmic or WI and just read on a companies blurb that very low charge temps can . I quote the text here



"Whilst the results of these tests are good it is possible to make the induction air temperature too cold and it is vitally important to inject the correct amount of water as at some point the volume of water needed to correct the temperature can be too much for correct combustion and power is lost. If the temperature drops below 40C, "fuel dropout" can occur, a phenomena where fuel vapours turn into droplets which won't burn as efficiently and can cause a weak mixture which can ultimately have the same catastrophic consequences as high inlet temperatures."



Is this true for a rotary application or is there an ideal temp.

Scott

SilverSeven

My car with FMIC generally runs with intake temps around 27-30c on the highway on a reasonably cool night, and I've seen it stay as low as 18c during the winter, and I haven't noticed any problems with that.

Dramon_Killer

With my front mount on a 60 degree night I generally see temps in the 120-130 range.

setzep

[quote name='Dramon_Killer' date='Apr 16 2005, 01:27 PM']With my front mount on a 60 degree night I generally see temps in the 120-130 range.


[/quote]



Are you kidding? What does your FMIC look like? On a 60 deg day I might see 85 deg with a 14"x15" core.

sdminus

Nice one.. Im still waiting for a air charge temp gauge to turn up. MY pfc wont display on the commandor........

Im more concearned with the charge temp building whilst the car is stationary. ie on the line...

Scott

Dramon_Killer

[quote name='setzep' date='Apr 16 2005, 09:09 PM']Are you kidding? What does your FMIC look like? On a 60 deg day I might see 85 deg with a 14"x15" core.


[/quote]



Forgot to add, this is with stock s5 turbo running 7 psi

sdminus

I got my act in now

Im runnning 24 deg C charge temps at 80 deg water temps using a Trust Fmic.

im looking at get some WI to try and make it all a bit safer

Scott

raising arizona

[quote name='sdminus' date='Apr 7 2005, 10:17 AM']Hi

I have a small question about air charge temps. I ve always been of the understanding that the idea was to try and get the air charge temp down to or as close to ambient air temp as possible. How ever i have been looking into a co2 spray bar for my fmic or WI and just read on a companies blurb that very low charge temps can . I quote the text here



"Whilst the results of these tests are good it is possible to make the induction air temperature too cold and it is vitally important to inject the correct amount of water as at some point the volume of water needed to correct the temperature can be too much for correct combustion and power is lost. If the temperature drops below 40C, "fuel dropout" can occur, a phenomena where fuel vapours turn into droplets which won't burn as efficiently and can cause a weak mixture which can ultimately have the same catastrophic consequences as high inlet temperatures."



Is this true for a rotary application or is there an ideal temp.

Scott


[/quote]





Get your air filters out of the engine bay and then really see some low intake temps.... Mine run about 5 deg F more than ambient,,,

coolingmist

we are running a group buy on our water injection kits in the group buy section. Our site is www.coolingmist.com



Feel free to check it out. We also have our own forum here.