I'd grill the guy first- ask any and all questions you can think of. Then let us know what he says. $160 is high for shipping to me
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I can see how the power increase would be a function of pump fuelling, and hard to put an actual number on. Bill's truck would gain more power (over, say, stock sticks) with the same Superxxx injectors than Mom's tuck would, because his is flowing LOTs more fuel than my mom's is. It is a pet peeve of mine when someone says their injectors will give me x Hp increase. How do you know? Have you done dyno runs on my rig before and after without my knowledge? What about my pump, turbo, exhaust, intake, air filter improvements, and the brand jeans I am wearing? It all adds up.
As far as power without smoke, it depends on atomization and spray angle. The angle has to be optimized for the piston bowl design and the combustion chamber. By "combustion chamber" I am referring to the environment in which the fuel is injected, near TDC on the compression stroke. Affected by piston design, head gasket thickness, etc, etc. That is why PODs and 370s are famous for their haze- they're from a non-automotive application, and thus not the best for low smoke AND good power in our trucks. Not to say they dont give good bang for the buck, but they arent optimized for our application. Getting the fuel volume in there (along with adequate air, naturally) is half the story- getting it where it needs to be in the combustion chamber is the other half.
A good example is the DonM EDMs I had. Looking at the atomization on the test stand, it looked like they should have been clean up to about 500hp with the AFC removed, and they could well have been; just not in my engine. Comparing the hole patterns told a different story. The holes were arranged in a circle on the tip different from stock, even accounting for the 5th hole (nonIC), and the angle of the pattern was offset differently. I think that had the buggest impact. Plus, I am not sure of the piston differences between the early and later, P-pumped 12Vs.
There are a lot of factors that line up for good power and low smoke, esp when you consider our 12v injectors are offset to one side of the combustion chamber, along with being angled. I think a set of honed/ EDMed (I'm not going to start that war here) tips from a stock IC set up would net near ideal atomization and spray patterning.
Not to dump on this guy's claim of gaining 3pmg in a 92 truck, but I have gained more MPGs with just getting the stock tips cleaned and pop pressures reset. What kind of condition were the injectors he took out of said truck? The stockers will run quite clean, just dont have much room for extra power with the limits of the VE pump.
Daniel
Attention: TDR Forum Junkies 
. C'mon, it's ebay.
