ideal o2 voltage and timing?

[AlmostStock TSi]

can someone tell me what the ideal o2 voltages are and what the ideal timing advance is?


Thanks in advance.

 

[GST4U2NV]

depends on the year

 

[AlmostStock TSi]

its a 91 tsi awd

 

[Quacylla]

o2 voltage depends on the mods.

With no knock I get timing under wot 1st gear thru 3rd between 20~24 degrees (per my logger... base timing stock).

 

[AlmostStock TSi]

pms, 14b, 3" turbo back exhaust, profec b @ 20psi

 

[Quacylla]

Stock fuel pump?

 

[AlmostStock TSi]

yes, totally stock fuel system

 

[Grizzly Racing]

read this info from TMO........

it gives a lot of good info on where to keep Timing, knock, etc. what builds power and what cause loss of power.

http://www.vfaq.com/TMO

 

[Quacylla]

I highly doubt your fuel system can handle your mods. Do you have a datalogger? What does your a/f ratio look like thru a full 3rd gear pull?

 

[AlmostStock TSi]

through a full 3rd gear pull i am getting about .78-.80v from the o2 sensor. and i am getting about 16-21 degrees advance timing.

 

[Quacylla]

Is it dropping off as the rpms increase?

O2 voltages aren't much to tune by but I'd think with the stock IC you should be aiming for around 0.90~0.92V.

Do you have a datalogger? If so what are your knock sums like?

 

[AlmostStock TSi]

yes i have a datalogger, but it doesnt read knock sums(or at least i havent found out how to yet). the readings stay pretty constant through the rpm range(they actually get a tad higher at higher rpm).

btw i have the "interacq" logger