Ogolden1

OH, I definitely can feel it pull harder, but NOT until top end ~ 5,400rpm to 7,000 - That's ONLY 1,600 rpm of actual FEELING thru the WHOLE POWER BAND RANGE!!!

I mean, look at the Dynos, that IS when it REALLY starts to make a difference!

Whereas, with the PCM mod, you can feel it pulling harder ALL THE WAY THRU the power band! ...ESPECIALLY, in the low to mid range where you drive MOST of the time!

EricL

Comment on headers:

I added the headers and AEM CAI at the same time as the sways. I already had the very light SSR wheels (faster across whole speed range).

There is a synergistic effect -- if you lighten a car or the wheels, you get more of an effect from the mods.

For example, if your driving up hill (like adding more weight or heavy wheels to a car), the gas flow in the intake and exhaust is slower than if the car is going down hill (at full throttle).

Do an experiment -- try the headers by going up a slight incline and see how the 5000-7000 RPM performance is. Now, do the same experiment on a slight downhill. (You will notice a huge difference in the downhill vs. uphill acceleration in the 5K to 7K area when going downhill vs. stock. When going uphill, the effect is not as pronounced. (It works for me&#8230

Some people are going to think that I'm just stating the obvious, but there is a subtle point I'm trying to make. If a car has a lot of air flowing through it, the components that help this (headers and AEM) have a much greater effect.

So, if you lighten up the wheels or tires, you will get a compounding effect.

BNut

I haven't heard of any S4's with blow motors yet.

Ogolden1,
We are still waiting to see those dyno's that show the huge power gains you are FEELING. Heck even track times will do.

Just giving ya a hard time.

moomaster_99

No S4s with blown motors!?!...

BNut

A couple of the MY 2000 S4's have had blown turbo's and small handful of the MY 2001 have had problems but the it looks like the majority of the problems were with the 2000 models.