The balance of our assembly included the excellent Indy 440-2D dual-plane intake manifold, ported and prepped in a previous issue to flow 360-plus-cfm. We will top the intake with a large Demon carburetor. Needless to say, we are going out on a limb with this unusual combination of large, high-flowing heads, combined with a very short duration, high-lift cam, and a large two-plane intake capped with a big four-barrel. The goal is an exceptionally good idle and strong torque, with impressive power into the lower 6,000-rpm range. We expect to put the theory to the test in a full dyno session in an upcoming issue. We'll sample several capacities of Demon carbs from Westech's inventory of dyno carburetors, and hope to experiment with an Indy single-plane intake, to see how the power at higher engine speeds responds. Will it work? We sure hope so, but you can bet we'll be packing a big solid roller stick as a back up, just in case we turn out to be all wet with our experiment. Hey, but it just may work. Stay tuned.
| INDY EZ HEAD SPECS |
| 440 EZ | 440 EZ-1 | EZ-295 CNC | EZ 325 CNC |
| Intake volume | 270cc | 275cc | 295cc | 325cc |
| Exhaust volume | | | 79cc | 79cc |
| Chamber volume | 75 or 80cc | 75 or 80cc | 78 or 82cc | 78 or 82cc |
| Intake window | stock B/RB | Max Wedge | Max Wedge | Max Wedge |
| Porting | as-cast | partial CNC | full CNC | full CNC |
| Rocker oiling | standard | standard | external | external |
| Rocker offset | standard | standard | standard | offset |
| Intake valve dia. | 2.19" | 2.19" | 2.19" | 2.19" |
| Exhaust valve dia. | 1.81" | 1.81" | 1.81" | 1.81" |
| INDY PORT FLOW - Intake |
| Tested by Indy |
| 28-inch H2O Depression |
| 440 | 440 | EZ-295 | EZ 325 |
| LIFT | EZ | EZ-1 | CNC | CNC |
| .200 | 156 | | 162 | |
| .300 | 216 | | 216 | |
| .400 | 264 | | 274 | |
| .500 | 290 | | 324 | |
| .600 | 300 | | 351 | |
| .700 | 305 | | 355 | |
| INDY PORT FLOW - Exhaust |
| Tested by Indy |
| 28-inch H2O Depression |
| 440 | 440 | EZ-295 | EZ 325 |
| LIFT | EZ | EZ-1 | CNC | CNC |
| .200 | 98 | 98 | 110 | 110 |
| .300 | 129 | 129 | 149 | 149 |
| .400 | 158 | 158 | 176 | 176 |
| .500 | 178 | 178 | 196 | 196 |
| .600 | 199 | 199 | 211 | 211 |
| .700 | 215 | 215 | 225 | 225 |