A/F procede videos

zsapphire7 · 08-10-2010, 01:53 PM

Can someone do me a favor and take some recordings of their A/F ratios while cruising? steady speed, flat road would be best. Id like to compare my A/F ratios

. Im not sure how steady it's supposed to be or what range theyre supposed to be around for daily driving.

TIA

OpenFlash · 08-10-2010, 01:56 PM

Quote:

Originally Posted by zsapphire7

Can someone do me a favor and take some recordings of their A/F ratios while cruising? steady speed, flat road would be best. Id like to compare my A/F ratios

. Im not sure how steady it's supposed to be or what range theyre supposed to be around for daily driving.

TIA

It won't be steady. It will toggle around midway point like any good closed loop fuel system.

zsapphire7 · 08-10-2010, 01:58 PM

i understand that but it seems to jump around a lot for a constant throttle. I kinda expected a closed loop system to be more on target and smoother. Just want to confirm that by looking at others to see whats normal

.

Former_Boosted_IS · 08-11-2010, 07:09 AM

I have some from my FJO at consant throttle if you want. They are pretty steady on my car.

zsapphire7 · 08-11-2010, 12:38 PM

Quote:

Originally Posted by Former_Boosted_IS

I have some from my FJO at consant throttle if you want. They are pretty steady on my car.

Id definately like to see some please! Im suspecting that maybe an injector was calibrated wrong or something. The AF goes from 245 then jumps to 270 and back down to 245 under constant throttle. Its a solid pattern and i bet one injector is richer than the others.

Former_Boosted_IS · 08-12-2010, 07:07 AM

Quote:

Originally Posted by zsapphire7

Id definately like to see some please! Im suspecting that maybe an injector was calibrated wrong or something. The AF goes from 245 then jumps to 270 and back down to 245 under constant throttle. Its a solid pattern and i bet one injector is richer than the others.

What is 270? You don't have real AFR output?

Sniz · 08-12-2010, 08:01 AM

Quote:

Originally Posted by Former_Boosted_IS

What is 270? You don't have real AFR output?

he's referring to the afr output the procede is using the oil temp gauge.

I'm assuming you can use the logger to see the actual values??

I'd be hard pressed to have a n54 heavily modded and not have a real logging AFR setup in the car. on my e36 I watch that gauge like a freaking hawk while under boost.

Former_Boosted_IS · 08-12-2010, 08:06 AM

Quote:

Originally Posted by Sniz

he's referring to the afr output the procede is using the oil temp gauge.

I'm assuming you can use the logger to see the actual values??

I'd be hard pressed to have a n54 heavily modded and not have a real logging AFR setup in the car. on my e36 I watch that gauge like a freaking hawk while under boost.

Ahhh. Get a real log, then we can compare.

zsapphire7 · 08-12-2010, 06:08 PM

So heres the video of what im talking about.

Its very regular under constant throttle. When i change to 5th gear or 4th gear it moves alot more at the same speed. I feel like the dealer could have improperly calibrated one of the injectors... A few months ago the injectors were replaced and recalibrated.

Ill try to run some datalogs.

Glowin · 08-13-2010, 12:35 PM

Video for the lazy:

08-10-2010, 01:53 PM	#1
zsapphire7 Colonel 111 Rep 2,368 Posts Drives: 08 e92 M3 Join Date: Oct 2007 Location: SF Bay Area iTrader: (21)	A/F procede videos Can someone do me a favor and take some recordings of their A/F ratios while cruising? steady speed, flat road would be best. Id like to compare my A/F ratios . Im not sure how steady it's supposed to be or what range theyre supposed to be around for daily driving. TIA
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08-10-2010, 01:58 PM	#3
zsapphire7 Colonel 111 Rep 2,368 Posts Drives: 08 e92 M3 Join Date: Oct 2007 Location: SF Bay Area iTrader: (21)	i understand that but it seems to jump around a lot for a constant throttle. I kinda expected a closed loop system to be more on target and smoother. Just want to confirm that by looking at others to see whats normal .
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08-11-2010, 07:09 AM	#4
Former_Boosted_IS Major General 315 Rep 5,175 Posts Drives: 4 Wheels Join Date: Aug 2007 Location: Planet Earth! iTrader: (15)	I have some from my FJO at consant throttle if you want. They are pretty steady on my car.
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08-12-2010, 06:08 PM	#9
zsapphire7 Colonel 111 Rep 2,368 Posts Drives: 08 e92 M3 Join Date: Oct 2007 Location: SF Bay Area iTrader: (21)	So heres the video of what im talking about. Its very regular under constant throttle. When i change to 5th gear or 4th gear it moves alot more at the same speed. I feel like the dealer could have improperly calibrated one of the injectors... A few months ago the injectors were replaced and recalibrated. Ill try to run some datalogs.
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08-13-2010, 12:35 PM	#10
Glowin Captain 83 Rep 978 Posts Drives: X3 35 & 335i now - M2/M4 next? Join Date: Jun 2009 Location: Seattle iTrader: (0)	Video for the lazy:
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