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If you're looking for a fuel injector upgrade for your late model GM truck motor or marine engine, these are your injectors. Used as original equipment on 8.1L marine engines, and works as an upgrade on many other applications. They're compatible with gasoline, ethanol, and E85, making them perfect for your alcohol-burning race car as well as pump gas applications. These are a specialized size; here is a list of known applications.
GM: 2001-2003 8.1, 2000-2005 5.3, 2001-2006 4.8
These injectors are a disc type with three holes for superior atomization - no "squirt gun" spray pattern here. They put out a nice conical spray pattern at around a 20 to 24 degree angle. It is rated at 43.5 psi and the maximum pressure (measured between the fuel rail and the manifold) is 60 psi. Bumping the pressure up to 60 psi gives a flow rating of 43 lb/hr.
This chart shows the maximum power these injectors should be used to support for naturally aspirated and forced induction engines on both gasoline and E85. This chart assumes a maximum duty cycle of 85%, and the brake specific fuel consumption numbers used for the calculation are given in the chart. Numbers are rounded down to the nearest crank horsepower.
| Number of injectors |
NA gasoline |
Turbo / supercharged gasoline |
NA E85 |
Turbo / supercharged E85 |
| 1 |
62 |
48 |
41 |
33 |
| 2 |
125 |
96 |
83 |
66 |
| 3 |
188 |
145 |
125
|
99
|
| 4 |
251
|
193 |
167 |
132
|
| 5 |
314 |
241 |
209 |
165 |
| 6 |
377 |
290 |
251 |
198 |
| 8 |
503 |
387 |
335 |
264 |
| 12 |
754 |
580
|
503
|
397 |
| 16 |
1006 |
774 |
670 |
529 |
| BSFC |
0.50 |
0.65 |
0.75 |
0.95 |
Being marine injectors, Delphi designed these for extra corrosion resistance. They're meant to stand up to 60 hour salt spray tests without damage. |
