would i need a tune

Chuck33079 · 08-15-2013, 03:08 PM

And if he's two points leaner than that after the intake there's an issue.

Sh0velMan · 08-15-2013, 03:27 PM

He's 2 points richer.

This happens (in my experience) when the MAF readings get too far of a % out of "stock" either direction. The car defaults to a super rich "save your ***" tune. Same thing happened when I put on my Nismo intakes (with or without the venturi spacers that are supposed to maintain the stock metering orifice) and before the tune went on.

Chuck33079 · 08-15-2013, 03:29 PM

I thought if he was at 10:1 before the intake, and 12.5 after then he's running leaner. Maybe I misread his initial post.

Sh0velMan · 08-15-2013, 03:30 PM

Quote:

Originally Posted by Chuck33079

I thought if he was at 10:1 before the intake, and 12.5 after then he's running leaner. Maybe I misread his initial post.

You're right, I misunderstood.

If he's at 12.7:1 he's perfect and should stop worrying about it.

10:1 is way wrong.

Chuck33079 · 08-15-2013, 03:32 PM

If the 12.7 is right, he's good to go. If that 12.7 is off as much as his stock reading, he's asking for trouble especially considering how hot IATs get with short rams.

Sh0velMan · 08-15-2013, 03:38 PM

Quote:

Originally Posted by Chuck33079

If the 12.7 is right, he's good to go. If that 12.7 is off as much as his stock reading, he's asking for trouble especially considering how hot IATs get with short rams.

I can tell you this... my AFR targets, specified by Jared @ UpRev are 12.68:1.

So there's that. haha

I'm currently running rich (11.5's) and down significantly on power since changing exhausts and filters...which was unexpected...but that's another topic completely.

Chuck33079 · 08-15-2013, 03:41 PM

Yeah. He's either dead on or playing with fire, depending on how off his readings are. If he's off the same amount post intake as he was pre intake, that's not good. If he really is seeing 12.7, then he's good to go. A dyno run with the tailpipe sniffer in would clear up that question in a hurry.

luigi90210 · 08-15-2013, 03:43 PM

Quote:

Originally Posted by Dynotronics1

should be in the 11.8- 12.5 range at full load that's the stock target, but we have seen them all over the place in real life

OK I never saw 11.8 at full load, always 10 stock, even after the ecu reset the dealer did when they changed my CSC it was 10:1, I started seeing the 12.7:1 after I threw on the intakes and reset the ECU

Any chance my app isn't giving me correct data? I don't have any other way to log AFRs so I don't know if torque is giving me wrong data or not, it shouldn't since its just pulling that data off the ECU

Chuck33079 · 08-15-2013, 03:45 PM

It's very possible you're getting bad data. Find a place near you for a couple of dyno runs with their wideband in the tailpipe. You'll know for sure.

luigi90210 · 08-15-2013, 03:48 PM

Quote:

Originally Posted by Sh0velMan

He's 2 points richer.

This happens (in my experience) when the MAF readings get too far of a % out of "stock" either direction. The car defaults to a super rich "save your ***" tune. Same thing happened when I put on my Nismo intakes (with or without the venturi spacers that are supposed to maintain the stock metering orifice) and before the tune went on.

I have always seen 10.1 stock, before my ecu was reset by the dealer and after with stock intakes with drop ins.

Anyone have an android phone with torque pro and uprev to compare data?

Don't really have the money to be doing dyno runs at the moment

Chuck33079 · 08-15-2013, 03:50 PM

If its always been 10.1:1, you either have something wrong with your car or your data logging. A couple of dyno runs are ~$50-75. That's a lot cheaper than popping a motor because what you thought was 12.7 was 14.7 and you sucked up a bunch of hot air or bad gas.

critical · 08-15-2013, 03:53 PM

Your AFR is what your ECU is seeing. Doubtful it's bad data. Also since you're not logging data you're just looking at it while driving (right?) it's probably not accurate.

luigi90210 · 08-15-2013, 03:59 PM

Quote:

Originally Posted by critical

Your AFR is what your ECU is seeing. Doubtful it's bad data. Also since you're not logging data you're just looking at it while driving (right?) it's probably not accurate.

Ya I'll do a 3rd gear pull to red line and look at where it is at.

Idle and everything sits @ 14.7:1. I can do a data log on my way home today though and see where exactly I sit.

critical · 08-15-2013, 04:05 PM

Setup logging like I showed you. And ditch yo ebay intakes lol

luigi90210 · 08-15-2013, 04:13 PM

Quote:

Originally Posted by critical

Setup logging like I showed you. And ditch yo ebay intakes lol

If its causing me to run too lean then I will but if it isn't than I won't.

08-15-2013, 03:08 PM	#16 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	And if he's two points leaner than that after the intake there's an issue. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:27 PM	#17 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 20	He's 2 points richer. This happens (in my experience) when the MAF readings get too far of a % out of "stock" either direction. The car defaults to a super rich "save your *" tune. Same thing happened when I put on my Nismo intakes (with or without the venturi spacers that are supposed to maintain the stock metering orifice) and before the tune went on. __________________ Buy My Car!** \| Build Thread

08-15-2013, 03:29 PM	#18 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	I thought if he was at 10:1 before the intake, and 12.5 after then he's running leaner. Maybe I misread his initial post. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:32 PM	#20 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	If the 12.7 is right, he's good to go. If that 12.7 is off as much as his stock reading, he's asking for trouble especially considering how hot IATs get with short rams. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:41 PM	#22 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Yeah. He's either dead on or playing with fire, depending on how off his readings are. If he's off the same amount post intake as he was pre intake, that's not good. If he really is seeing 12.7, then he's good to go. A dyno run with the tailpipe sniffer in would clear up that question in a hurry. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:45 PM	#24 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	It's very possible you're getting bad data. Find a place near you for a couple of dyno runs with their wideband in the tailpipe. You'll know for sure. luigi90210 likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:50 PM	#26 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	If its always been 10.1:1, you either have something wrong with your car or your data logging. A couple of dyno runs are ~$50-75. That's a lot cheaper than popping a motor because what you thought was 12.7 was 14.7 and you sucked up a bunch of hot air or bad gas. luigi90210 likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

08-15-2013, 03:53 PM	#27 (permalink)
critical A True Z Fanatic Join Date: Oct 2012 Location: Washington Posts: 1,252 Drives: 09' 370z 7AT Rep Power: 16	Your AFR is what your ECU is seeing. Doubtful it's bad data. Also since you're not logging data you're just looking at it while driving (right?) it's probably not accurate. luigi90210 likes this. __________________ Quaife w/ gears \|Stillen Gen 3\|SOLD FI Resonated Test Pipes \|SOLD FI 18'' \| 25row Stillen Race \| Progress 35mm/25mm sways \| Swifts/Koni\|Volk G25's\| Stoptech SS lines\|\|SPL Front/Rear Arms\|

08-15-2013, 04:05 PM	#29 (permalink)
critical A True Z Fanatic Join Date: Oct 2012 Location: Washington Posts: 1,252 Drives: 09' 370z 7AT Rep Power: 16	Setup logging like I showed you. And ditch yo ebay intakes lol __________________ Quaife w/ gears \|Stillen Gen 3\|SOLD FI Resonated Test Pipes \|SOLD FI 18'' \| 25row Stillen Race \| Progress 35mm/25mm sways \| Swifts/Koni\|Volk G25's\| Stoptech SS lines\|\|SPL Front/Rear Arms\|

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