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Old 12-04-2007, 07:42 AM   #1
Overlord2kx
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Default Which tables need to be tuned for which mods?

Hey everyone,

Im slowly trying to learn to tune myself, and I have a pretty dumb question: Which mods are related to which tables on the ECU?

For example, changing the intake requires tuning of MAF scaling table, changing injectors requires tuning of injector latency among other things, etc etc.

Im not saying I need an EXACT list, but if anyone has a rough summary of the relation between mods and certain changes on the ECU, that would be extremely helpful.

Thanks.
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Old 12-04-2007, 03:47 PM   #2
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only scale the maf setting w/ a larger than 70mm inlet, inj latency is not for noobs , adj flow scaling for u/g inj.
Basically you can do a fuel tune w/out too many mods being done or any .
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Old 12-04-2007, 04:40 PM   #3
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Don't listen to him ^. Any change in intake size (smaller or larger) will require MAF scaling.
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Old 12-04-2007, 05:09 PM   #4
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Don't listen to him ^. Any change in intake size (smaller or larger) will require MAF scaling.
+1
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Old 12-04-2007, 05:10 PM   #5
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only scale the maf setting w/ a larger than 70mm inlet, inj latency is not for noobs , adj flow scaling for u/g inj.
Basically you can do a fuel tune w/out too many mods being done or any .
Considering the stock one is 65mm...... giving tuning advice isn't for noobs either.
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Old 12-04-2007, 05:13 PM   #6
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double post
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Old 12-04-2007, 05:13 PM   #7
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correctundo...check out osecuroms.org view some base maps and tables and compare them to your stock one to get an idea of chart layout and function with certain mods for example tbe, intakes, uppipes, tmic, boost control solenoids ect. and if you are really worried message braden and see what he can do for you. his maps are affordable and well worth the money.
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Old 12-04-2007, 10:05 PM   #8
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Quote:
Originally Posted by sense of nature View Post
only scale the maf setting w/ a larger than 70mm inlet, inj latency is not for noobs , adj flow scaling for u/g inj.
Basically you can do a fuel tune w/out too many mods being done or any .

Uh no, my intake is 66.5 mm and I needed to tune it.
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Old 12-04-2007, 10:47 PM   #9
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So everyone who has a larger than 65 or 66.5 mm intake has had to have they're maf rescaled ? I guess you could ,why ? The ecu does compensate for some degree of change , Unless it's too great a volume ?
Anyway To each tune is their own , My afr's /loggs are strait along w/ my tuned rides , No complaints, no blown decks .

Last edited by sense of nature; 12-04-2007 at 10:54 PM.
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Old 12-04-2007, 10:58 PM   #10
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The ecu only does a/f corrections in closed loop. At really high load/rpm you're in open loop and the ecu CAN NOT make fuel corrections. If you're happy with really high a/f correction and learning at low rpm/load I guess that's up to you. Do you even tune with a wideband?
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Old 12-04-2007, 11:29 PM   #11
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hmm ok thanks for the input so far guys. I guess ill compare some maps to see the changes.
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Old 12-05-2007, 08:15 AM   #12
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The ecu only does a/f corrections in closed loop. At really high load/rpm you're in open loop and the ecu CAN NOT make fuel corrections. If you're happy with really high a/f correction and learning at low rpm/load I guess that's up to you. Do you even tune with a wideband?
100% YUP.Once you change the size of the MAF housing the sensor is no longer in calibration for Openloop operation since it relies on the MAF.O2 feedback is no longer used,which is a good thing because the stock sensor cannot read below 11.25:1 AFR and is pretty unreliable under 13:1 AFR.
http://www.cobbtuning.com/info/?ID=3223
http://www.ecutek.com/tuning/induction/
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Old 12-05-2007, 08:23 AM   #13
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So everyone who has a larger than 65 or 66.5 mm intake has had to have they're maf rescaled ? I guess you could ,why ? The ecu does compensate for some degree of change , Unless it's too great a volume ?
Anyway To each tune is their own , My afr's /loggs are strait along w/ my tuned rides , No complaints, no blown decks .
Anything different than stock.How exactly are you tuning openloop?
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Old 12-05-2007, 09:50 AM   #14
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Nevermind
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Old 12-05-2007, 04:07 PM   #15
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long term and short term fuel adjustments are made in the ecu
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Old 12-05-2007, 04:25 PM   #16
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long term and short term fuel adjustments are made in the ecu
Not in openloop,just closed loop fuel correction.Read the links I posted.

Last edited by quazimoto; 12-05-2007 at 04:32 PM.
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