useless

Hi all can you please suggest any help with my air fuel ratios and lower power?What should they be?

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useless150 rwkws air fuel.jpg (105.9 KB, 85 views)

mcccy005

They should be exactly as they are!!
It should be around 14.7 normally (maybe as low as 17ish:1 when cruising); and when you nail it, depending on the car, it should be around 12ish:1. There are 'optimum' ratios for most power; but it does vary with each car and based on your dyno; as soon as the car gets nailed; it increases fuel to around 11.5-12.5:1 - perfect if you ask me!

Walkinshaw

for NA you can run up to arround 13.5:1 safely, AFR's below 12.5:1 are usualy reserved for blown/turbo cars (or mine lol).

You could lean it out a touch, but your AFR's are reasonable and dont show the typical falcon trait for running at 10.5:1 (like mine and 1/2 of SA's cars as shown at DD3) under WOT. Clearly this is from a good macthing cam (DEV4) to your stock fuel maps

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Ive been described as a vault of usless random knowledge.

Ill take it as a complement i think.............

useless

Really?? So my ratios would not benefit from a chip? Can my low air fuel ratios be improved for better drivability? Also if im using bucketloads of fuel what would affect that at idle ego?

Casper

Yes, they would benifit from a chip. They are a "tad" rich, not too bad though. Also remember that the chip can advance the ignition too (like turning a dizzy) which cant be done any other way in the AU. So not only would you get an optimum A/F ratio but an aggressive ignition. Now all you have to decide is if the benifits of slightly more power (we are not talking bucketloads) and a better throttle respose is worth the cash mate. 90% of the noticable gain would be made in the first 3000rpm.

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useless

I wonder how much they can give me from 60 kmph onwards? Iwonder what is possible? How much power can these guy give me below 100kmph at 60 80 100??

INJECTED250

Why do they always plot with kmph. i hate that.. why carnt they graph with rpm in 1.1... pretty got figures there

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EB FALCON
98 T5 gear box (was auto)
Wade 977b cam
3.7 lsd
AU bottem end
ELXR6 ported Head
PH4480 Pacemakers

useless

The blue line iswhat i am getting now but air fuel ratios are the same as last time im geting 141.9 rwkws for now,but it is getting better every day.

Soxx

You only need to ask the dyno operator to plot in RPM.

Rick.

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4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?