What is the richest safe air/fuel ratio

oldcar

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folks, as you are awared that I was going to get revo stage 2 tunning at VW after I did the FMIC 2 weeks ago. I went there, he asked me if I did the dump pipe, I said no but only 2.5 inch sports system after cat.
He said no.....I must get it done first. Well, must get a dump pipe with high flow cat from Xforce.

My current Revo stage one A/F ratio is 12.5 to 1. My question is How rich can this K04 take before its called too rich??/ any idea thanks- 11 or 11.5?? What are your thoughts?
 
you cant just talk afr's in isolation

you have egt also.. one controls the other and when egt protection comes in (std 920c) it fuel dumps - on wideband K04 210/225 cars

dump pipe? whats that in English? downpipe?
 
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you cant just talk afr's in isolation

you have egt also.. one controls the other and when egt protection comes in (std 920c) it fuel dumps - on wideband K04 210/225 cars

dump pipe? whats that in English? downpipe?
****** Aussie slang or what haaaa Jenno is right down pipe....
 
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