For those experienced in GEN5 Z06 tuning, what AFR seems to be the sweet spot? 11.5?
Also, I'm going to plumb-in an EGT probe right at the collector on headers so I'll be able to see the correlation between the temps and AFR.
Thx
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For those experienced in GEN5 Z06 tuning, what AFR seems to be the sweet spot? 11.5?
Also, I'm going to plumb-in an EGT probe right at the collector on headers so I'll be able to see the correlation between the temps and AFR.
Thx
why don't you just download z06 stock tune from repository and start there?
12.25 - 12.50
these are direct injected not port injected
WOW...will 12,25-12.5 at wot be safe AND produce more power?
Higgs is right on the money!!!
is this based on stoich being 14.1 ?
.83-.85 lambda that will answer your question
all the oem tunes that I downloaded had stoich at 14.1 Is that because of the gas alcohol content?
I'm in nth Florida...93 octane, but I believe 10% ethanol.....so 14.1 is good (stoich) and 11.7-12 at wot??
14.68x.85=12.48
14.11x.85=11.99
Don't think about AFR, look at units of lambda...
Say you have a flex fuel sensor and you have e50 in the tank.... What AFR value will your afr Guage show at idle..... This will help you understand better
I understand most of this, what I am asking is whether I should be using the 14.1 that was oem on my vehicle and all the other oem tunes that I downloaded, or 14.7 ? which I assume is what Higgs based his reply on. I only use afr for talk, I walk with lambda....lolQuote:
Originally Posted by Ben Charles
thx
Set stoich to whatever fuel your using..... If you have NON ethanol Gas set it to 14.68
ok...just checking to be sure....
thx again
Yes lambda .83
When I speak in afr it's based on 14.68 since that's what everyone's brain is programmed to for stoich even though stoich today for pump is usually 14.1
Whoa! :worship: Thanks for all of the responses! (more than I bargained for!)
Thanks to all! I'll have some data-logs to share soon....and likely ask for more help. :)
out here in California on 91, I've had better luck targeting a little more rich Lambda, more like .80ish... it allows me to get a little more timing in it and a little more power. Plus if the customer is tracking the car (road course) or sustained highway pulls, the cats (if the car still has them) will appreciate the added fuel and more timing.
Thanks for the great content and suggestions! It's for a road course car, so conservative (cool) is key. Highflow cats are in the ARH headers, but may swap out for catless if the heat becomes a problem, which is another reason I'm intending to watch EGT's.
Agreed, same with our 93 E-10, I spent some time running up and down the PE command, and 1.25 EQ or .80 lambda or 11.7 AFR whichever you like, is where we are seeing best overall power.Quote:
Originally Posted by rynez06
Ted.
1.25 is 11.28 AFR on E10.....Quote:
Originally Posted by JANNETTYRACING
That is why I log in Lambda on my superflow dyno using AFM-1000 widebands.Quote:
Originally Posted by Higgs Boson
That brings up another whole conversation.
If you put 1.25 in the PE table the log reports commanded lambda of .80 regardless of what you put in the Stoich table.
Adjusted stoich directly effects fueling by itself.... So if your actually using 14.1 as stoich and a 1.25 PE your are targeting 11.2....
I personally would never use 1.25 PE value on a Di blower setup....
Then again you guys with crappy fuel are trying to keep things cool.. To each there own