Do FD's use top-feed or side-feed injectors?
02-11-03, 04:39 AM
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94 FD, 69 Datsun Roadster
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The primaries (550cc) are top feed, while the secondaries (850cc) are side feed. Side feed injecotrs have fuel input from the side of the injector body (they fit into the fuel rail instead of the rail at the top). I do not know what other engines have this setup, all the other engines I know use top feed. I imagine it was a space issue when designing the engine.
02-11-03, 02:26 PM
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Originally posted by roadsterdoc
The primaries (550cc) are top feed, while the secondaries (850cc) are side feed. Side feed injecotrs have fuel input from the side of the injector body (they fit into the fuel rail instead of the rail at the top). I do not know what other engines have this setup, all the other engines I know use top feed. I imagine it was a space issue when designing the engine.
The primaries (550cc) are top feed, while the secondaries (850cc) are side feed. Side feed injecotrs have fuel input from the side of the injector body (they fit into the fuel rail instead of the rail at the top). I do not know what other engines have this setup, all the other engines I know use top feed. I imagine it was a space issue when designing the engine.
I believe all four of the RX-7 injectors are side feed, as are many japanese OEM cars..
3SGTE
SR20DET
2JZGTE
to name a few. The side feed design allows the fuel to act as a cooling agent to the injector, immersing the entire unit fuel drops the operating temps. It also allows low-profile installations. However, Some impedances/flow rates are simply not available in the side feed design due to physical limitations.
02-11-03, 03:35 PM
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Originally posted by roadsterdoc
The primaries (550cc) are top feed, while the secondaries (850cc) are side feed.
The primaries (550cc) are top feed, while the secondaries (850cc) are side feed.
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