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Tertiary fuel injectors on the S4

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Old 01-29-11, 03:22 PM
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Tertiary fuel injectors on the S4

Has has anybody considered this idea? The openings on the secondary runners are a spot on fit for the fuel injectors. The hole lines up directly with the top ports of the end housings (6 port Intake). Just an idea for now, maybe change the positions on the secondaries to the new location for more direct injection.




Old 01-29-11, 03:38 PM
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I don't think the TII LIM's have those, so there probably has not been many attempts at this.
Old 01-29-11, 06:30 PM
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i wanna say ive seen this before, but i'm not sure it ran?
Old 01-29-11, 09:51 PM
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It doesn't exactly look like the tips get real close to the intake charge either. If they're any farther away than the primaries are from the flow path I wouldn't do it.
Old 01-30-11, 09:16 AM
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Rx-8's have 6 injectors from the factory
Old 01-30-11, 09:52 AM
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i setup a friends car with 3 s4 N/A injectors with a AIC for high boost.

Had a fuel rail made and mounted on intake elbow on the charge pipe right before throttle body.
they had there own fuel pump and tied into an enlarged return line.
Old 01-30-11, 10:41 AM
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Originally Posted by RX7 13B 4 UR AZZ
i setup a friends car with 3 s4 N/A injectors with a AIC for high boost.

Had a fuel rail made and mounted on intake elbow on the charge pipe right before throttle body.
they had there own fuel pump and tied into an enlarged return line.
Results....?
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