MAF scale adjustment
09-11-2010, 04:22 PM
#1
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MAF scale adjustment I know it's been discussed before, but bear with me;
I TRYING to tune a 98 C5 H/C blower car. I am working on getting the MAF calibration (I swapped to Z06 MAF) because my fueling is off BIG TIME at WOT. I'm getting closer, but I notice my mounted gauge going lean (high 12's and 13 flat) toward the end of a run and back off fast.
It turns out my MAF scale runs out.... My final Hz reading is 11200, and I am seeing 13376 at 5400! I've heard that you have to "trick" it some way, but can't find the exact answer.
I TRYING to tune a 98 C5 H/C blower car. I am working on getting the MAF calibration (I swapped to Z06 MAF) because my fueling is off BIG TIME at WOT. I'm getting closer, but I notice my mounted gauge going lean (high 12's and 13 flat) toward the end of a run and back off fast.
It turns out my MAF scale runs out.... My final Hz reading is 11200, and I am seeing 13376 at 5400! I've heard that you have to "trick" it some way, but can't find the exact answer.
09-12-2010, 12:12 PM
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I have bumped my PE, starting at 5200, to a ratio that would take it from 14.7 to 10.5 (safety first as the starting point), which is the same as the amount that would make offset the difference from the 13 recorded to the 10.5 I need to start at, but have held off testing until I heard back.
09-13-2010, 07:02 AM
#8
I know it's been discussed before, but bear with me;
I TRYING to tune a 98 C5 H/C blower car. I am working on getting the MAF calibration (I swapped to Z06 MAF) because my fueling is off BIG TIME at WOT. I'm getting closer, but I notice my mounted gauge going lean (high 12's and 13 flat) toward the end of a run and back off fast.
It turns out my MAF scale runs out.... My final Hz reading is 11200, and I am seeing 13376 at 5400! I've heard that you have to "trick" it some way, but can't find the exact answer.
I TRYING to tune a 98 C5 H/C blower car. I am working on getting the MAF calibration (I swapped to Z06 MAF) because my fueling is off BIG TIME at WOT. I'm getting closer, but I notice my mounted gauge going lean (high 12's and 13 flat) toward the end of a run and back off fast.
It turns out my MAF scale runs out.... My final Hz reading is 11200, and I am seeing 13376 at 5400! I've heard that you have to "trick" it some way, but can't find the exact answer.
09-13-2010, 12:12 PM
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I received the Z06 MAF with the blower, so I simply installed it and dialed the MAF in.
What would it involve?
Frost
I've thought about a SD tune, just don't know about the drivability without a MAF when it goes from low 40's to high 80's in a single day down here. I was hoping to keep the MAF since 95% of my driving is just tooling around at part throttle, which works well with the VE/MAF combo.
09-13-2010, 10:37 PM
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Just multiply the PE table by the percentage of leanness (.12) from 5200 up. This will take you from 13 to 11.5 then test it 1000 RPMs at a time. This is a good safe fuel ratio for a Maggie or ProCharger with 10lbs of boost or less with 16-18 degrees of timing up top.
Last edited by Sunny; 09-13-2010 at 11:22 PM.
09-14-2010, 06:48 AM
#11
Sorry; I'm not familure with the terminalogy, or procedure
I received the Z06 MAF with the blower, so I simply installed it and dialed the MAF in.
What would it involve?
Frost
I've thought about a SD tune, just don't know about the drivability without a MAF when it goes from low 40's to high 80's in a single day down here. I was hoping to keep the MAF since 95% of my driving is just tooling around at part throttle, which works well with the VE/MAF combo.
I received the Z06 MAF with the blower, so I simply installed it and dialed the MAF in.
What would it involve?
Frost
I've thought about a SD tune, just don't know about the drivability without a MAF when it goes from low 40's to high 80's in a single day down here. I was hoping to keep the MAF since 95% of my driving is just tooling around at part throttle, which works well with the VE/MAF combo.
09-14-2010, 07:37 AM
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I actually went ahead and made these changes to my PE table (actually put in 10.5 for safety to work my way up)but haven't tried it because I wanted to get some feedback 1st.
09-17-2010, 06:10 PM
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update Update;
I guess I will give up on the MAF, and go ahead and try and do a SD tune. I ordered the cobalt SS sensor and will get started
Question:
When I copy my VE over to the new VE table, since I'm blown, do I need to multiply the last line of the table by 1.25, or 1.50 and interpolate between entries?
Thanks
I guess I will give up on the MAF, and go ahead and try and do a SD tune. I ordered the cobalt SS sensor and will get started
Question:
When I copy my VE over to the new VE table, since I'm blown, do I need to multiply the last line of the table by 1.25, or 1.50 and interpolate between entries?
Thanks
