s5 keg into s4 drivetrain

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01-12-12, 06:05 PM

DRFT_HRD

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s5 keg into s4 drivetrain

Just a quick question I know I have to change a few things to make it run correctly, I just want to double check what I belive its just the front counterweight and flywheel or is there more that im missing? Id search but im on my phone and it gives me a error when I use the search function.

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01-12-12, 06:27 PM

Derekcat

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The front counter weight and the flywheel have to match the series of your rotors:
S5 rotors = S5 flywheel/counterweight.

The flywheel must also match your transmission [NA or Turbo]

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01-12-12, 06:31 PM

DRFT_HRD

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Ah ok so i just need to grab a tranny.

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01-13-12, 12:50 PM

barnett87rx7

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then you need to block off your omp of find a s4 one. and make sure you use low impedance injectors not the high impedance that come with an s5

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01-13-12, 02:04 PM

RXSpeed16

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Quote:

Originally Posted by DRFT_HRD

Ah ok so i just need to grab a tranny.

Only if you are changing from non-turbo to turbo. S4/S5 Transmissions are interchangeable. NA/Turbo transmissions are not. As Derekcat pointed out above.

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01-13-12, 02:13 PM

SonicRaT

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Quote:

Originally Posted by barnett87rx7

then you need to block off your omp of find a s4 one. and make sure you use low impedance injectors not the high impedance that come with an s5

That depends highly upon the wiring harness/year of the car. The later S4's had high impedance injectors as well. If you've got a resistor pack, then use lows, otherwise, use highs.

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01-13-12, 08:39 PM

DRFT_HRD

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i have highs now and it has a s4 turbo swap in in it just a blown motor, so if i pick up a s5 keg as long as i have the flywheel (i will be running premix) i can just swap it in correct?

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01-14-12, 02:31 PM

barnett87rx7

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Quote:

Originally Posted by SonicRaT

That depends highly upon the wiring harness/year of the car. The later S4's had high impedance injectors as well. If you've got a resistor pack, then use lows, otherwise, use highs.

thats right my bad

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01-15-12, 03:15 PM

DRFT_HRD

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Im just trying to be.

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01-15-12, 03:16 PM

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DRFT_HRD

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Quote:

Originally Posted by DRFT_HRD

Im just trying to be.

Im just trying to be clear. (Stupid phone.)

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01-17-12, 12:54 PM

#11

DRFT_HRD

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any feedback i dont wanna assume and be up **** creek.

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01-17-12, 05:10 PM

#12

barnett87rx7

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Quote:

Originally Posted by DRFT_HRD

i have highs now and it has a s4 turbo swap in in it just a blown motor, so if i pick up a s5 keg as long as i have the flywheel (i will be running premix) i can just swap it in correct?

Yes as long as the flywheel is an s5 and you run premix n block off the omp and your injectors match your harness you should be good

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04-30-23, 11:51 PM

#13

Maxwellwitharx7

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Question about everything

Hey so to start off I have a rx7 fc 1988 has a 13b s4 in it right now but one of the rotors lost compression and so I found a S5 keg for cheap he has the flywheel also but he says it needs to be resurfaced but I’m okay with fixing that up just wondering what I need to look at for the injector part also I already premix so where would I look for the plug for the omp.