LOL
Here's the deal. I can't inject anymore nitrous/meth into the cylinders because the larger shot size would start over quenching the combustion process. No more performance increase can be had that way. But, what if a shot of nitrous/meth was injected after the cylinders while the ALS was active? Injected at the Y-pipe, just before the turbine housing?
The TC I'm using now is just a tad on the tight side (200-300 rpm) during the launch, but it's so close that I don't want to mess with it. Better to err on the tight side than on the loose side.
The turbo is performing great with the turbine a/r just a little on the large side, but there again, it's really close. I only need 2 or 3 more pounds of boost for the launch.
Three tiny tuning adjustments that are all working against getting this combination working perfectly.
If the TC was just a tad looser at the launch by 200-300 rpm,...
Or the turbine housing a/r was just a little tighter,...
Or the port nitrous shot just a little more powerful.
Of the three variables to play with, the easiest one to change seems to me to be the nitrous shot. We're maxed out injecting nitrous before the cylinder to be burned in the cylinder, but, can we increase exhaust mass and temp by injecting after the cylinder? The object being not to increase power occurring in the cylinder directly with the shot, but to increase exhaust mass and temp to get up on the turbo a little quicker, make the boost rise quicker, and accelerate the engine power rate of climb that way.
One nozzle with adjustable jets would allow a multitude of shot sizes to be tried to dial in the best launch attitude.
The best mixture would most likely be one that is close to stoich to produce the most amount of heat from the afterburn.
Right now the turbo is reaching 175 kPa in 1.3 to 1.4 seconds after the car launches. I'd like to better that by a few tenths.