S-AFC + AF gauge = good enough?
#1
S-AFC + AF gauge = good enough?
Is just an Air flow ratio gauge enough for tuning an Apexi S-AFC?
I've heard they are horribly inaccurate.
The other method I know of is EGT. Which would require tapping into the down pipe etc.
Another question: What are the appropriate temperature ranges on a turbo rotary for lean, stoich and rich? and what air flow ratio's apply to what temperature?
I need to get my S-afc tuned asap so i can get it to a dyno. Thanks.
-Mike
I've heard they are horribly inaccurate.
The other method I know of is EGT. Which would require tapping into the down pipe etc.
Another question: What are the appropriate temperature ranges on a turbo rotary for lean, stoich and rich? and what air flow ratio's apply to what temperature?
I need to get my S-afc tuned asap so i can get it to a dyno. Thanks.
-Mike
#3
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Unless its a wideband, no. EGT would be good if you know what the numbers your looking at mean as far as tuning it, but your best bet is a wideband on a dyno. Lots of dyno places will have a wideband you can just tune with then just keep an air/fuel gauge to get a decent idea of if your running way to rich or lean.
#4
I need to drive the car to a dyno. Right now it's acting a little wierd with the S-AFC in place. it's sitting at about a 2k idle. and then bogging. There isn't any vaccum leaks i can tell of because it doesn't die out and I don't have to keep my foot on it to keep it running.
#5
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Originally posted by f1blueRx7
Is just an Air flow ratio gauge enough for tuning an Apexi S-AFC?
Is just an Air flow ratio gauge enough for tuning an Apexi S-AFC?
I've heard they are horribly inaccurate.
I need to get my S-afc tuned asap so i can get it to a dyno.
I need to drive the car to a dyno. Right now it's acting a little wierd with the S-AFC in place. it's sitting at about a 2k idle. and then bogging.
#6
I've upgraded the injectors to 720cc low imp injectors. All wires are soldered in place according to the series 4 wiring diagram.
I get Air/fuel mixed up with Air flow pretty easily so please excuse any mistakes
Also:
I bought this S-AFC used, will it still have all the settings resident from the previous user? And if I "Intialize" the unit will it reset them back to the base line?
I get Air/fuel mixed up with Air flow pretty easily so please excuse any mistakes
Also:
I bought this S-AFC used, will it still have all the settings resident from the previous user? And if I "Intialize" the unit will it reset them back to the base line?
Last edited by F1blueRx7; 05-16-04 at 08:23 PM.
#7
I'm a boost creep...
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Originally posted by f1blueRx7
I've upgraded the injectors to 720cc low imp injectors. All wires are soldered in place according to the series 4 wiring diagram.
I've upgraded the injectors to 720cc low imp injectors. All wires are soldered in place according to the series 4 wiring diagram.
I bought this S-AFC used, will it still have all the settings resident from the previous user? And if I "Intialize" the unit will it reset them back to the base line?
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#11
Ok results for monday: Initialized AFC, turned key completely off, then back to on. Set points up to 4000 at 0% and 4000 and above to -13%. Also Adjusted TPS. to 1volt while key is at on position. It was previously 1.575. The smoking issue was too much premix in the gas. I've diluted it to the correct ratio now. Ok, the Weird part is that when I start the engine, Idle goes directly to 1000 RPM then grows steady up to 2000 RPM, then if I put my foot on the gas it will go up to whatever RPM I want, but it will not decelerate when I take my foot off the pedal.
EDIT: I should mention it was doing the same thing prior to adjusting the TPS / Initalizing however, if I let it sit at 2000rpm it would eventually start to drop down to 1000 RPM.
EDIT: I should mention it was doing the same thing prior to adjusting the TPS / Initalizing however, if I let it sit at 2000rpm it would eventually start to drop down to 1000 RPM.
#14
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NZconvertible, do the secondary injectors have anything to do with the 5/6th ports opening? Will the secondaries activate @3.8k regardless if the ports of functional or present? I would really like to know.
#16
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Originally posted by DEZERTE
NZconvertible, do the secondary injectors have anything to do with the 5/6th ports opening? Will the secondaries activate @3.8k regardless if the ports of functional or present? I would really like to know.
NZconvertible, do the secondary injectors have anything to do with the 5/6th ports opening? Will the secondaries activate @3.8k regardless if the ports of functional or present? I would really like to know.
#18
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Originally posted by DEZERTE
NZconvertible, do the secondary injectors have anything to do with the 5/6th ports opening?
NZconvertible, do the secondary injectors have anything to do with the 5/6th ports opening?
Will the secondaries activate @3.8k regardless if the ports of functional or present?
Originally posted by f1blueRx7
It wasn't fully warm no. It was about half way...
It wasn't fully warm no. It was about half way...
#19
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Yes, I concur NZConvertible, important it's fully warmed up.
But not always 1/2 way up the guage, especially if you have a S4 like I think you do, f1blueRx7?
S4's are generally only 1/4 way up the stock temp guage when they're at operating temp.
(ps, yes, sorry, I know you pedantic english basterds I know I used 'but' at the start of a sentence...)
(pss, just thought i'd add that tidbit about the temp guage incase there was any misconception about where fully warmed up actually was.. Please forgive my intrusion if there was no misconception.. )
But not always 1/2 way up the guage, especially if you have a S4 like I think you do, f1blueRx7?
S4's are generally only 1/4 way up the stock temp guage when they're at operating temp.
(ps, yes, sorry, I know you pedantic english basterds I know I used 'but' at the start of a sentence...)
(pss, just thought i'd add that tidbit about the temp guage incase there was any misconception about where fully warmed up actually was.. Please forgive my intrusion if there was no misconception.. )
Last edited by White_FC; 05-19-04 at 10:17 AM.