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 Post subject: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:12 am 
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I Say: if bourbon or a bandaid cant fix it your truely ****ed
Vehicle: my99 gt forester - green

Posts: 55
Location: lismore, nsw Australia
what im asking is is there a rough table of target afr per psi
eg 10psi target= 12.5afr
11psi target= 12.7afr ect ect

cheers :drinks:


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:15 am 
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I Say: Look a rabbit!
Vehicle: VW R36 Wagon

Posts: 2048
Location: Bentleigh East Melbourne
Just get a wideband O2 sensor to get accurate readings

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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:26 am 
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I Say: Hitting the Apex!
Vehicle: '11 FXT+'14 GLA45+'15 WRX

Posts: 4083
Location: Northern NSW
Wideband AFR in dump pipe is around 11.6:1 on 15psi

You want 13.1 at around 3psi but say 8psi at 3000rpm will be 12.5 but 8psi at 6000rpm would be 11.8 due to amount of fuel and advanced timing

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Throttlehappy Tuning

Upcoming Travel Dates
June 30th - July 3rd: Taree, Newcastle, Gosford(30th-1st), Sydney, Wollongong, Nowra, Canberra(2nd-3rd)
July 6th -13th: Sydney, Townsville, Cairns, Mackay, Brisbane


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:36 am 
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I Say: if bourbon or a bandaid cant fix it your truely ****ed
Vehicle: my99 gt forester - green

Posts: 55
Location: lismore, nsw Australia
throttlehappy wrote:
Wideband AFR in dump pipe is around 11.6:1 on 15psi

You want 13.1 at around 3psi but say 8psi at 3000rpm will be 12.5 but 8psi at 6000rpm would be 11.8 due to amount of fuel and advanced timing

thankyou i have the wide band in the stock o2 location and on wot 3rd gear im floating around 11.5-11.9 @14-15psi


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 4:11 pm 
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I Say: Hitting the Apex!
Vehicle: '11 FXT+'14 GLA45+'15 WRX

Posts: 4083
Location: Northern NSW
Perfect :)

WOT on boost is usually not an issue, it is the transition from vacuum to boost that the AFR's sometimes run lean :)

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A married man should forget his mistakes, there is no point two people remembering the same thing.

Throttlehappy Tuning

Upcoming Travel Dates
June 30th - July 3rd: Taree, Newcastle, Gosford(30th-1st), Sydney, Wollongong, Nowra, Canberra(2nd-3rd)
July 6th -13th: Sydney, Townsville, Cairns, Mackay, Brisbane


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 5:27 pm 
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I Say: if bourbon or a bandaid cant fix it your truely ****ed
Vehicle: my99 gt forester - green

Posts: 55
Location: lismore, nsw Australia
throttlehappy wrote:
Perfect :)

WOT on boost is usually not an issue, it is the transition from vacuum to boost that the AFR's sometimes run lean :)

i plan to get a piggy back fuel controller, the one im looking at can adjust maf/map voltages dependant on rpm and can also recieve signals from wideband and has data logging with 2x 5v analog inputs.once i get this in and running i can log properly- at the moment my windows lappy is sick and i cant log my wideband just looking while driving. getting to the point-
should i try to tune afr to <12.5 once positive pressure is present across the rpm range? and also where do you lean the afr's down low? sorry if this is too many free questions throttlehappy but at the moment i cant get you to tune the ecu anyway so any clarification is GREATLY APPRECIATED
:drinks: ill buy you some drinks at the ozfoz cruise if you come down :D


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:38 pm 
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I Say: Hitting the Apex!
Vehicle: '11 FXT+'14 GLA45+'15 WRX

Posts: 4083
Location: Northern NSW
Don't get a piggy back just yet. I am building another batch of my conversion ECU's to run an 01 JDM ECU in the earlier GT and WRX

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A married man should forget his mistakes, there is no point two people remembering the same thing.

Throttlehappy Tuning

Upcoming Travel Dates
June 30th - July 3rd: Taree, Newcastle, Gosford(30th-1st), Sydney, Wollongong, Nowra, Canberra(2nd-3rd)
July 6th -13th: Sydney, Townsville, Cairns, Mackay, Brisbane


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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 10:43 pm 
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I Say: Look a rabbit!
Vehicle: VW R36 Wagon

Posts: 2048
Location: Bentleigh East Melbourne
Good to hear mate. What type of time frame are you looking at for completion?

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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 11:42 pm 
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Vehicle: MY99 GT White

Posts: 767
Location: Warrnambool
throttlehappy wrote:
I am building another batch of my conversion ECU's to run an 01 JDM ECU in the earlier GT and WRX



^^^this^^^

i like this.

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 Post subject: Re: is there a guide per psi of target afr for our ej20's
PostPosted: Sun Jul 01, 2012 11:53 pm 
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I Say: Hitting the Apex!
Vehicle: '11 FXT+'14 GLA45+'15 WRX

Posts: 4083
Location: Northern NSW
Should have another 10 or so done by September. They will also happily run the carbibles speed density patch with a mod to the ROM file ECU ID so factory afm becomes obselete, can also run stock waste spark or convert to CoP

_________________
A married man should forget his mistakes, there is no point two people remembering the same thing.

Throttlehappy Tuning

Upcoming Travel Dates
June 30th - July 3rd: Taree, Newcastle, Gosford(30th-1st), Sydney, Wollongong, Nowra, Canberra(2nd-3rd)
July 6th -13th: Sydney, Townsville, Cairns, Mackay, Brisbane


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