Yeah, shiny and polished. They aren't SS but they look like it.
You have many choices if injectors and nozzles, to the point it is mind numbing. New bodies, reman bodies (3 levels of quality from Bosch), 3rd party remans, it is endless. Nozzles the same way, stock, stock hones larger, BMS larger, BBI's and their special processes plus spray angle differences and design available on all of them.
VCO are like the stock nozzles, the pintle seats on the orfices, SAC are the older style where the pintle seats above the orfices leaving a little fuel in the tip. The VCO nozzles are cleaner as there is no potential for dribble after the event and are mainly for emissions. The SAC nozzles have more meat in the tips that are in the hottest part of the cylinder so they will take more heat and cooling cycles before deteriorating.
You can have one of 3 spray angles depending on the nozzle, 124 (stock), 126 SAC, and 143 SAC, and probabaly 143 on on VCO blank but not many do that. A slightly larger orfice, measured in HP, percent, or lpm, cna sometimes help with efficiency. I have a 50 HP 143 SAC nozzle on new bodies in a deep spray bowl engine. Witht he correct timing and tunign it is clean even with a 100 HP tune on it, plus, will get 1-1.5 mpg better than the stock nozzles in comparable good scenarios. Maybe a little worse in less than ideal scenarios but not a significant departure from stock.
You can get a 60 HP 126 SAC nozzle that is correct pattern for the late engines but there is a chance of haze at an idle. Not sure why the 126's do that and the 143's don't but it could simply be tuning or other engine parameters or just the result of that design. You can get BBI's either pattern that are +800 HP capable yet perform better than a stock nozzle in lower HP settings with the correct tuning.
With all these combinations the injectors can be balanced and tuned to provide smoother operation and ultimatley better efficiency, results dpendent on the skill of the person doing the blanacing and mods.
Whne it comes time you can drive yourself crazy trying to decide what is best for what you want to do and spend. When you finally decide you can defend and promote your solution as the best and only one for the rest of the world becasue if you are spending $2500-4000 on just injectors they MUST be the ultimate solution and if you have to spend that much everyone else must join in so you don't fell left out.
Yes, injector choices and discussions are truly entertaining. :-laf:-laf
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