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04-17-2009, 09:39 AM | #1 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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MAF Cliping with Turbo Kit
Hi, I have a Yaris 1nzfe with:
Greddy turbo Greddy emanage ultimate with sensor pressure Injector 380cc Fuel pump Cp pistons 9:1 cr Pauter roads Cams Greddy elettronic overboost I have mapped with 18 psi turbo pressure but the MAF between 3500 - 4500 rmp is cliping. Could I eliminate the toyota Maf? Thanks |
04-17-2009, 11:25 AM | #2 |
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Please post pictures, especially of the cams, and dyno chart.
Where did you get the head studs for your build?
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04-18-2009, 08:14 AM | #3 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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Sorry but I don't have a dyno charts because i want eliminate the Maf sensor because it is a problem at 3500 rmp the car is block and i want know if the problem is the MAF or O2sensor under 10psi the problem don't have but up 10 psi have this problem.
Thanks |
04-18-2009, 09:59 AM | #4 |
I dont think the Greddy emanage will lit you bypass the MAF it kinda needs it. Im not an expert with MAF sensor's but i think to fix your problem your going to need a bigger higher flowing MAF. Your only other option that will eliminate the MAF is to go with a full standaloan EMS. ( AEM,MOTEC,HYDRA ect.)
Regard Arthur
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05 Scion tC allmotor 350+ hp 9.34@144mph 05 Scion tC sfwd 880hp 9.96@147mph 05 Scion xB 280hp 12.97@104mph 07 Toyota Yaris 357hp 12.80@107mph |
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04-18-2009, 11:01 AM | #5 |
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Yeah I highly doubt it is the O2 sensor, most likely it is the MAF sensor. It is scaled for only so much air, unless you can install a larger MAF and scale the curve for the added g/s of airflow, then you need to lose it and put a MAP sensor in there...
Good Luck! |
04-18-2009, 05:36 PM | #6 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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Thanks for your answer..
The problem is the MAF sensor, with greddy Emanage Ultimate I can eliminate the MAF sensor with "Airflow Output" map but I have need of the values of the MAF sensor with stock engine ( volt at all RPM). Someone could help me? Thanks |
04-18-2009, 06:34 PM | #7 | |
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Quote:
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
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04-21-2009, 05:56 AM | #8 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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Who knows the 1NZ-FE MAF voltage range?
Thanks |
04-21-2009, 09:48 AM | #9 |
Drives: 2007 Yaris HB Join Date: Apr 2007
Location: my own little world
Posts: 1,256
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You mean just the normal operating range? The manual says its between 0.4 V and 2.2 V
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04-21-2009, 11:30 AM | #10 | |
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Quote:
100 0.4 200 0.430508475 300 0.461016949 400 0.491525424 500 0.522033898 600 0.552542373 700 0.583050847 800 0.613559322 900 0.644067797 1000 0.674576271 1100 0.705084746 1200 0.73559322 1300 0.766101695 1400 0.796610169 1500 0.827118644 1600 0.857627119 1700 0.888135593 1800 0.918644068 1900 0.949152542 2000 0.979661017 2100 1.010169492 2200 1.040677966 2300 1.071186441 2400 1.101694915 2500 1.13220339 2600 1.162711864 2700 1.193220339 2800 1.223728814 2900 1.254237288 3000 1.284745763 3100 1.315254237 3200 1.345762712 3300 1.376271186 3400 1.406779661 3500 1.437288136 3600 1.46779661 3700 1.498305085 3800 1.528813559 3900 1.559322034 4000 1.589830508 4100 1.620338983 4200 1.650847458 4300 1.681355932 4400 1.711864407 4500 1.742372881 4600 1.772881356 4700 1.803389831 4800 1.833898305 4900 1.86440678 5000 1.894915254 5100 1.925423729 5200 1.955932203 5300 1.986440678 5400 2.016949153 5500 2.047457627 5600 2.077966102 5700 2.108474576 5800 2.138983051 5900 2.169491525 6000 2.2 |
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04-21-2009, 10:16 AM | #11 |
l33t3st Asshole
Drives: MY07 Yaris Liftback Join Date: Nov 2006
Location: Epcot
Posts: 588
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where in the turbo routing did you mount the MAF?
what size is the MAF housing? it's possible you're maxing out the MAF's readings and you need to go to a larger diameter MAF housing and retune. or you could be having issues if it's A.) too close to the turbo inlet B.) Blow thru (after the turbo outlet) C.) bad maf |
04-22-2009, 05:20 AM | #12 | |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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Quote:
The MAF housing is 2.20" |
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04-22-2009, 05:25 AM | #13 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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For CTScott
thank you very much for the value but my toyota MAF sensor is 0,2v at 4,9v. |
04-22-2009, 06:51 AM | #14 |
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04-22-2009, 07:28 AM | #15 |
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Have you measured the MAF voltage where the clipping occurs?
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04-22-2009, 09:13 AM | #16 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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yes is 3,94 volt at 4200rmp
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04-22-2009, 11:00 AM | #17 |
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OK. So, it that case I would scale it from 0.4 to 3.90 volts:
100 0.400 200 0.459 300 0.519 400 0.578 500 0.637 600 0.697 700 0.756 800 0.815 900 0.875 1000 0.934 1100 0.993 1200 1.053 1300 1.112 1400 1.171 1500 1.231 1600 1.290 1700 1.349 1800 1.408 1900 1.468 2000 1.527 2100 1.586 2200 1.646 2300 1.705 2400 1.764 2500 1.824 2600 1.883 2700 1.942 2800 2.002 2900 2.061 3000 2.120 3100 2.180 3200 2.239 3300 2.298 3400 2.358 3500 2.417 3600 2.476 3700 2.536 3800 2.595 3900 2.654 4000 2.714 4100 2.773 4200 2.832 4300 2.892 4400 2.951 4500 3.010 4600 3.069 4700 3.129 4800 3.188 4900 3.247 5000 3.307 5100 3.366 5200 3.425 5300 3.485 5400 3.544 5500 3.603 5600 3.663 5700 3.722 5800 3.781 5900 3.841 6000 3.900 |
04-22-2009, 09:21 AM | #18 |
Drives: Yaris Join Date: Apr 2009
Location: Italy
Posts: 77
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I have use the "Boost limiter cut" map but the engine between 4000 and 5000 rpm refrains slightly.. the A/F ratio is good
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