Interesting article on AFR 165 heads
Reply #24 –
Interesting. So it looks like the size change of the injector is directly proportional to the amount of power supported... ie: double the injector size = double the power supported.
Pressure, on the other hand, not quite the same. It appears that doubling the pressure increases the power supported by the square root of 2, with some slight variations... basing on the 40 vs 80 PSI numbers, as well as looking at 50 vs 100 PSI, it comes to anywhere form 1.407 to 1.416. Square root of 2 seems a good general rule.
But, given that 14 divided by 19 equals .73684, we can pretty much take the first column and multiply by that factor to figure out what the stockers would support at various pressures.
Thus, by my math, using the 19lb numbers as a basis:
[B]Fuel PSI[/B] [B]14 lb[/B]
40 psi 210 hp
50 psi 234 hp
60 psi 256 hp
70 psi 276 hp
80 psi 295 hp
90 psi 313 hp
100 psi 330 hp
Hm . . even at stock pressure of 40 psi (er, *is* that the stock pressure?), the little 14 pounders can handle a reasonable amount of power.
I assume the numbers from the chart you posted are assuming 8 injectors?