[Gmecm] PE lean issues on a ?747 TBI

[William Lucke]

What gears were you running and what gears are you running now?
If you have anything like a factory 305 cam, then stiff gears are not what 
you ought to be thinking about.



Will


>From: Per Lonnborg <perlon at passagen.se>
>Subject: [Gmecm] PE lean issues on a ?747 TBI
>
>Hi,
>
>I run a Monza with a stock 350TBI with the 747 ECM from a ?88 Van, the only
>modifications so far is headers into a 3" single free-flowing exhaust.
>I haven?t made any bigger mods in the chip more than lower the Main fuel
>Tables a bit because nearly all BLM values where on the rich side.
>
>I have made 2 trips to the strip with this setup, the first time approx one
>month ago I did a 14.64/95 run.
>Last Sunday best ET was slower, 14.98/94 despite the fact I had switched
>to a lower gear rear end and with POSI!
>
>Last Sunday the weather temperature was much higher(=lower density).
>
>I logged the runs with WinALDL,(I?ve attached parts of the data) and after 
>analyzing
>the values one can clearly see that the car goes lean on WOT, especially
>last Sunday.
>



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