That's very interesting, but that brings two things to mind;
1) My initial reason for doing this was to see if I could gain any of the power back at the top end that this turbo allegedly loses from using a smaller exhaust housing. The basic problem is that whilst the turbo flows 65 lb/min at it's peak, the exhaust housing might flow lets say only 52-55 lb/min. So I'm just not sure if using water injection is going to bring the 55 lb/min threshold on earlier giving me less rpms in my powerband or if the air being denser means the smaller exhaust housing my be able to flow more than 55 lb/min if the air is denser and therefore more condensed/compressed. Surely it stands to reason that 55 lbs of heated air is going to take up more space than 55 lbs of denser, saturated, cooler air?
2) Bringing spool on quicker is something I hadn't considered but if I were to use this method, I had not initially intended having the water injection come on so early. If it was boost activated the activation point would have to be very low, perhaps 5-7 psi or perhaps rpm based. Making it rpm based would however not take into account different loads and airflow in different gears. I wonder if an airflow based activation point run off the MAS/MAF would be worthwhile?
I also intended to run the water in a mixer nozzle with propane injection. I'm not sure if injecting propane at such low rpms is a good idea in which case I'd need to consider a liquid only system or maybe an air based pump.
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