View Single Post
  #14  
Old 21-08-2004, 05:46 PM
hotrod hotrod is offline
Senior Member
 
Join Date: Oct 2003
Posts: 307
Default stuff

Four cycle engines only intake stroke every other revolution for each cylinder

JohnA -- actually its not all that much for two reasons. First your not on full boost for more than just a few seconds at a time unless your making a landspeed record run on the salt flats.

Also 1.2 kg/min is only about 20 cc/sec or about 2/3's of a shot glass of fluid, divided among the engines cylinders. On a 4 cylinder 2 liter engine with 500 cc/min injector running static will inject 2000 cc/min of fuel

The turbo and the air flow currents and heating through the rotor actually tend to shred and tear the dropplets apart and cause nearly explosive evaporation, very little liquid water exits the rotor.

If you want to have a base reference on how much water an engine can ingest during WWII Pratt and Whitney ran what they called flood tests on their aircraft engines where they turned up the water injection to the point that liquid water was pouring out the exhaust ports and the engines still ran with no problems. That level of injectant reduced the engine power from a max of 2000-2800 hp down to about 600 hp but there were no problems.

As far as the limits of the pump and injectors you are probably correct. That is why I am running a 100 psi Shurflo pump with a capacity of 1.4 gal/min ( 5.3 L/min) and a 5 Gal / hr nozzle ( 315 cc/min) on a rather small 13G turbocharger. The 13G only flows about 25 lb/min of air (11.45 kg/min) which comes out very close to 3 % of air flow for the spray flow.

I will probably be adding nozzles here soon.

Larry
Reply With Quote