APR 93 oct program. Holy poop. Thought I was fast before.

 

Woohoo!
Now go get that thang washed!
J/K

 

I also noticed that the tranny shifts much smoother now. Did the front rotors and brakes and the diverter valves.

This week the driver side control arms are being replaced.


I guess I will save for the downpipe next

 

Have you done the TBB? What about the cat back? Have you already added an exhaust. I'd also consider a good boost gauge next.

 

None of those yet. Can you tell me the purpose of adding a boost gauge. Perhaps you also could tell me about psi, what should the chipped S4 be running at ?

I know very little about turbo's (besides the cool sound)

Thanks in advance.

 

Your psi should be in the mid teens for a GIAC chip, spiking to no more than 19. The boost gauge will keep you informed of this data (real time) and, as soon as anything begins to appear as a problem (within the turbos), your gauge will be the first to let you know. A good gauge should read vacuum for off-throttle response, too. Make sure it reads more than 20psi when shopping around - you'll need the extra room on the gauge to be sure it is displaying accurate data - good gauges read 30 psi.

Typical chipped cars are 14-16 psi, while the stock S4 is 11-12psi.

Hope this helps.

 

Yes, this info helps very much. Thank you.

 

Ok, I ordered the boost gauge from APR today, thanks for the advice.