C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LTFT data

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Old Sep 20, 2009 | 02:51 PM
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Lars87
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From: Grand Sport #82
Default LTFT data

I did a log on my car and found that there is sometimes more than 10% difference between bank 1 and 2.

Also at high rpms Bank 1 it is at 13.5 and bank 2 is at 9.5.
At idle bank 1 is -10% and bank 2 at -1.5%

Does that cause any performance problems?
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Old Sep 20, 2009 | 05:01 PM
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96GS#007
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Originally Posted by Lars87
I did a log on my car and found that there is sometimes more than 10% difference between bank 1 and 2.

Also at high rpms Bank 1 it is at 13.5 and bank 2 is at 9.5.
At idle bank 1 is -10% and bank 2 at -1.5%

Does that cause any performance problems?
At WOT you want them to be zero. What the above shows is that you're a bit lean. Having said that, two data points isn't enough to make any real decisions.

at idle the split is a bit large but it won't cause performance problems.

I e-mailed you regarding the log files. The format your software exports the data in isn't usable. I sent one of my AutoTap files exported to Excel to show what it needs to look like.
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Old Sep 21, 2009 | 06:59 AM
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Lars87
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From: Grand Sport #82
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Hi Jim.

I have attached here a sceenshot of both mine and your data set.
I am not sure how you want them organized

A screenshot of my data:


A screenshot of your data:


Excuse my ignorance, I am just starting to get onbaord with this data reading and logging
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