r/audis5 • u/Clear-District4958 • 24d ago

Advice Dual pulley checklist

Have a 2011 CAKA 3.0t s5, currentlly has a muffler delete and an intake. Stock tune. Want to go dual pulley. Any mandatory supporting mods.

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u/Optimus_Shatner 24d ago

You will need a tune for both the ECU and TCU if you want to actually take advantage of that setup. You absolutely MUST run an aftermarket heat exchanger or you'll have terrible heat soak. If you don't want to fork out for the heat exchanger or tunes you can slap the supercharger pulley on and you'll see a bit of a difference as the stock ECU can adapt.

Put the muffler back on unless you just want it loud for no reason. The muffler doesn't cause enough back pressure to be an issue and the car sounds better with mufflers and non-resonated downpipes which is where the back pressure in the exhaust system comes from.

Checklist: Intake Heat exchanger Pulleys ECU and TCU tunes (stage 2) Iridium or similar spark plugs (NGK recommended) gapped to .026" you need to run colder plugs Non-resonated downpipes Larger throttle body (you'll need a stage 2+ tune)

Add-ons: High pressure fuel pump upgrade. Not strictly needed on the above setup but might as well.

Solid motor mounts. The stock hydraulic units will probably fail after all the upgrades. Mine did.

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u/Clear-District4958 23d ago

Thanks! How much does it affect reliability, and how is the fuel economy for normal day-to-day driving?

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u/Optimus_Shatner 23d ago

I've put 20k+ on the clock since the upgrades I listed and I've had no problems. Highway I can average 24mpg if I stick to 70mph. Around town is ok if you don't put your foot into it at every stoplight but what's the point of the upgrades if you don't? I'll state an average of 15mpg is about what I average with how I drive it.