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Ideal Afr For 400Kw+


djqc

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  • Member For: 13y 4m 9d

Adam is correct, a car can be run at 13.5:1or leaner if the spark table is set up for it, although combustion temps, (not coolant temp) will get higher with a lean mixture.

To those quoting AFR's on other fuel bseide unleaded, are you sure the dyno was set up to read the other fuels stoich value???? bet you don't know for sure, if you talk lambda we know things are reading correctly

I have an in cabin oil temp gauge, using the f6 cluster. It has defienitly raised in temp since the tune was done. 430kw on a stock motor is really leaning on it, isn't it? Is 12.8 too lean in my application?
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  • Member For: 19y 7m 9d
  • Gender: Male
  • Location: OZ

Without sounding like a rude dick....you really need to be talking to who ever did the work.

Obviously they think its safe, so have a chat with them and I'm sure they will give you some confidence.

Other option is to do a high speed run on a private road with a portable AFR meter / data logger after the car has been running for a bit....see what it actually is and present the information to your workshop for their analysis.

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  • Member For: 17y 7m 23d
  • Gender: Male
  • Location: south east suburbs

Mick would you tune a 430rwk falcon turbo on 98 octane with 12.8 air fuel ratio on a standard engine??

Edited by xr6t_ute
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  • Member For: 20y 11m 15d
  • Gender: Male
I'm pretty sure my car ran 11.5 afrs on e85, which I thought was quite low.

Meant to say lean not low. Car does feel good but does run slightly hotter on the temp gauge than pump fuel.

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  • Member For: 12y 2m 8d
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Isn't this a XFT or MT tuned car ?

Either of them have done enough to know what the go is. I would put enough trust in them to not worry about it mate.

If it was another workshop in WA then maybe I would sh*t my pants a bit.

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