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Title: Target lambda at WOT Post by: SB_GLI on September 11, 2014, 05:50:47 PM I'd like to discuss fueling, and in specific, target lambda at WOT.
I've seen just about everywhere on this forum, and in other log files from VWs and Audis, it seems a lot of people tune for around 12.5AFR. I've read everywhere, spoke with real life pro tuners (non ME7 tuners), and have positive experience with tuning for a richer AFR than that. I typically shoot for a 11.8-11.4 AFR as this cools the egts, allows further timing advance, and makes more power safely than a leaner AFR. Please discuss. Title: Target lambda at WOT Post by: ddillenger on September 11, 2014, 06:57:42 PM 91 octane=11.5
93 octane=a bit leaner Meth=12.5 Title: Target lambda at WOT Post by: kingkhalilz on September 11, 2014, 07:01:59 PM Wow, that rich?? I thought leaning it out made more power. Sure it heats things up but damn good to know.
By the way from a noobs perspective, the xdf file made is like way easy to understand stuff. It just really allowed me to double check my thinking on how stuff gets changed. Title: Target lambda at WOT Post by: ddillenger on September 11, 2014, 07:05:24 PM This is what I've had the best experience with. Obviously you should lean it out until knock becomes an issue. With shit gas, you have to target a super rich AFR if you want to run any sort of timing.
Title: Target lambda at WOT Post by: FlyboyS4 on September 11, 2014, 07:25:27 PM I'd like to discuss fueling, and in specific, target lambda at WOT. I've seen just about everywhere on this forum, and in other log files from VWs and Audis, it seems a lot of people tune for around 12.5AFR. I've read everywhere, spoke with real life pro tuners (non ME7 tuners), and have positive experience with tuning for a richer AFR than that. I typically shoot for a 11.8-11.4 AFR as this cools the egts, allows further timing advance, and makes more power safely than a leaner AFR. Please discuss. This is a subject for it's own thread. It is a discussion worth having, but will pull the a Stage 1 tune far off topic. Title: Target lambda at WOT Post by: SB_GLI on September 11, 2014, 07:58:48 PM 91 octane=11.5 93 octane=a bit leaner Meth=12.5 These values are pretty much on par with my pump and w/m tunes for my jetta. Title: Re: Target lambda at WOT Post by: nyet on September 11, 2014, 08:15:13 PM The restriction is high compression ratio + shitty gas.
If you drop compression, you can lean it out instead of adding AFR to get timing back. On 91oct, you ideally should do both. Title: Re: Target lambda at WOT Post by: ddillenger on September 11, 2014, 08:17:32 PM It's also worth noting that you can run DI engines leaner, that this is gas scale, and that euro fuel is much better than US.
Context and all. Title: Re: Target lambda at WOT Post by: Lost on September 11, 2014, 09:11:35 PM What AFR do you tune for on E85 for best power?
Title: Re: Target lambda at WOT Post by: NOTORIOUS VR on September 12, 2014, 12:55:14 PM It should be noted that every engine/setup will like different lambda for best/safe power... they above guidelines are ok, but they're just guidelines in the end.
E85 seems like like 0.8-79 lambda for the most part. Depends on other factors as well such as heat range of the plug, cams, etc. Title: Re: Target lambda at WOT Post by: Lost on September 12, 2014, 02:12:39 PM It should be noted that every engine/setup will like different lambda for best/safe power... they above guidelines are ok, but they're just guidelines in the end. E85 seems like like 0.8-79 lambda for the most part. Depends on other factors as well such as heat range of the plug, cams, etc. Well, it is an RS4, so 7 range plugs, oem cams. Would it be any diff in winter request when its e70? Trying to find nice middle. |