I'm working on setting up some of the values in my fuel tune and I have some options for idle conditions. One of them is a MAF limit that limits the signal sent to the ECU. This is based off air intake at idle.
So, in gram/second, how much air do our motors roughly injest during idle?
Thank you.
Idle air injestion, g/sec?
Moderators: Helpinators, Moderators
Idle air injestion, g/sec?
Lee
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
Re: Idle air injestion, g/sec?
Lee,
Found this on USMB, which states it shouldn't exceed 4.8 g/sec.....this is on a '97 EJ25, but I'd bet it's going to be very similar, since they use the same MAF system (albeit the JECs/AUTECS version).
GL,
Td
Found this on USMB, which states it shouldn't exceed 4.8 g/sec.....this is on a '97 EJ25, but I'd bet it's going to be very similar, since they use the same MAF system (albeit the JECs/AUTECS version).
GL,
Td
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
Re: Idle air injestion, g/sec?
Todd, thanks for the reply.
4.8 g/sec seems really low to me. Maybe it isn't, but 4.8g is not much at all. I just want to be sure the value I put in is correct so I don't lean it way out at idle.
Any other inputs?
4.8 g/sec seems really low to me. Maybe it isn't, but 4.8g is not much at all. I just want to be sure the value I put in is correct so I don't lean it way out at idle.
Any other inputs?
Lee
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
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- Fourth Gear
- Posts: 1902
- Joined: Sat Aug 09, 2003 5:02 pm
- Location: Woodruff, SC
Re: Idle air injestion, g/sec?
could always find the voltage from the MAF at idle on a stock-ish car and backtrack from there, couldn't you?
Disclaimer: If anything I post is inaccurate, please correct me. I do not wish to add to the misinformation floating around on the internet.
That being said, everything I post is accurate to the best of my knowledge.
Rio Red '91 Legacy SS
That being said, everything I post is accurate to the best of my knowledge.
Rio Red '91 Legacy SS
Re: Idle air injestion, g/sec?
Well that's what I'm hoping someone can give me or they can plug in one of Vikash's tools and tell me what it says at idle . I would do this myself except I've converted to a speed density system and no longer have a MAF.
But yes, if I had a voltage I could back out the injestion.
But yes, if I had a voltage I could back out the injestion.
Lee
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
Re: Idle air injestion, g/sec?
According to RevScan (which I strongly suspect uses a calculated airflow based off the MAF voltage) from a 13 sample collection...
Idle (rpm) = 750 (avg = 752)
Airflow [JECS] (g/s) = 2.6 through 3.4 (avg = 2.72)
MAF [JECS] (volt) = 0.94 through 1.02 (avg = 0.98)
Idle (rpm) = 750 (avg = 752)
Airflow [JECS] (g/s) = 2.6 through 3.4 (avg = 2.72)
MAF [JECS] (volt) = 0.94 through 1.02 (avg = 0.98)
'11 WRX Limited
'94 SS | 3" TBE, 07 TMIC, TD05H-16G, Revtronix Stage 2, Walbro -- Sold
'94 TW | R.I.P.
Re: Idle air injestion, g/sec?
^^^ Perfect!
That's exactly what I needed to know. Many thanks!
That's exactly what I needed to know. Many thanks!
Lee
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
93' SS, 5mt swapped, 182k, not stock...
96' N/A OBW 5sp, 212k, Couple mods... RIP
99' N/A OBW, 4eat, mostly stock.
-
- Fourth Gear
- Posts: 1902
- Joined: Sat Aug 09, 2003 5:02 pm
- Location: Woodruff, SC
Re: Idle air injestion, g/sec?
Ya beat me to it.
I was about to go plug in my evoscan to grab it........
I was about to go plug in my evoscan to grab it........
Disclaimer: If anything I post is inaccurate, please correct me. I do not wish to add to the misinformation floating around on the internet.
That being said, everything I post is accurate to the best of my knowledge.
Rio Red '91 Legacy SS
That being said, everything I post is accurate to the best of my knowledge.
Rio Red '91 Legacy SS