Air Fuel Ratio

[NimAjNeB]

Hey Guys,

I have just had a new Extreme exhaust fitted with a stainless pod filter and a bleed value to increase the boost to 10PSI.

I had it tested on a dyno and the air/fuel ratio was at about, just under 13 at idle and dropped off towards the end of the scale after the car produced it's maximum power to about 11.

My question is, is this too lean or at a dangerous level to be running the car at? I have had people tell me it's fine then other people tell me they have herd of valve seals burning out at 12.5 and mine is at 13!!!!!!!

Anyway just wondering and any info would be much appreciated.

Cheers

[PlasticStan]

You already asked this in the general maintenance forum! <_<

[Abo Bob]

Idle mixtures are supposed to be lean so it's fine. Overall sounds very rich as we would expect for the given mods. Safe as.

[NimAjNeB]

Yeah sorry about asking in both forums guys, will stick to one in the future.

Thanks for the advice.

Oh yeah the dyno readout was 174rwkw so hopefully if I can lean it out I'll get a little bit more.

Cheers