Is there a HUGE benefit from upgrading the ecu's in N/a's. Ive heard alot about the upgrade with turbos, not as much about na's though so I just assumed the benefits werent worth the cost. What ecu do you guys recommend?

 

If you go to a stand alone fuel controller you can net about 15-20hp on average by leaning out the fuel curb in diffenrent location's...also there is no aftermarket chip's availiable today for the NA ecu.

 

not a huge one. The reason they are so good on turbo FC's is because they allow the boost to be turned up. On an N/A, they will only help to optimize the A/F Ratios. So, some power will be gained, but not a whole lot unless the motor has internal work.

 

Rtek 2.0 is available for the S4 NA's, and with that you get fuel AND timing control. The factory timing on the NA's is fairly conservative, so power can also be had by running the timing closer to the ragged edge so to speak.

 

yes i'm having troubles deciding on getting or suspension