2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

injector help

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Old Sep 16, 2008 | 01:29 PM
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injector help

ok fellas i need help to id what kind of injectors i have on my s5 t2. is it a low or high dependent injector and how can i tell???? its a square top connector if that helps any, also can u mate a n/a injector clip with a turbo injector??? thanks for the help in advance
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Old Sep 16, 2008 | 01:39 PM
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You have 550cc high impedance injectors.
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Old Sep 16, 2008 | 01:45 PM
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oh ok thanks again. well can you mate the n/a injector clip to mate with a turbo 2 injector?? also im thinking about running some 800cc injectors from an fd would it work???
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Old Sep 16, 2008 | 01:47 PM
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Unless your running a turbo motor with NA harness...theres no point the NA will just run rich.
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Old Sep 16, 2008 | 01:51 PM
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yea im running a n/a harness on a t2 motor, its swap. what do you mean it will run rich?????
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Old Sep 16, 2008 | 02:32 PM
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If you swap in larger injectors then stock, it will run rich. The ECU has no way of knowing you just added 300CC to each injector and will continue to run them as if they were 550s.

By the way, all S5s have high impedance injectors and they are supposed to have round connectors.
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Old Sep 16, 2008 | 02:42 PM
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Originally Posted by Aaron Cake
If you swap in larger injectors then stock, it will run rich. The ECU has no way of knowing you just added 300CC to each injector and will continue to run them as if they were 550s.

By the way, all S5s have high impedance injectors and they are supposed to have round connectors.
well i have a t2 swap and its still using the n/a harness that's why it has a square top. i plan oh getting the rtek ecu chip to control some of the fuel and i have a apexi safc. so would everything be ok if i go this rout???? and btw could i used the injectors off of an fd???? the injectors are i believe 800cc. thanks again
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Old Sep 16, 2008 | 04:11 PM
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FD primary injectors are side feed, so no. The secondaries are 850CC and top feed, so yes.

An RTek will allow you to control the injectors. You don't need both an RTek and S-AFC.
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Old Sep 16, 2008 | 07:15 PM
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ok thanks again for all the help.
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Old Nov 5, 2008 | 05:36 PM
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would i have to do any mods to the fuel rail if i run the fd 850cc injector's and are the fd injectors high or low imp injectors??
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