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B8 S4 vs B8 RS4: Chris Harris


Aaron

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Audi really screwed the b8 rs4 up...at least when it comes to engine choice. That poor s4 was beat to shit.

 

I agree 100%, as do most.

You say that in the RS4 forums and they go on about how awesome N/A V8's are. And, for only "15k" you can catch back up to the B8 S4. :dumb:

 

If the RS4 got the 4.0T, I'd probably have one. Enough of this 300ft lbs of torque nonsense.

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Audi really screwed the b8 rs4 up...at least when it comes to engine choice. That poor s4 was beat to shit.

 

And the RS5.

 

I agree, at least in the B7 RS4, you had an even shittier V8 in the S4...

 

And yeah, that S4 is in amazingly horrible shape. Still moves out though.

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How does a tune change the boost out of a supercharger?

 

If I remember correctly, the s4 uses a type of bypass valve to bleed off boost, similar to a wastegate on a turbo. That valve is electronically controlled.

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How does a tune change the boost out of a supercharger?

 

They use the supercharger like a turbo, so they can have an artificially high torque curve. The S/C makes more boost than they want up top, but tons down low to give a big fat curve. They have a bypass valve that opens gradually as the RPM's increase so it flattens out. Software merely holds the valve closed.

 

APR, & Giac / others have also released smaller pulley's to extra extra power as well.

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