I read the article and I'm tring to do this but at WOT I get different readings at different RPMs.I'm taking off in drive and the volt reading starts at about .65 in 1st gear,goes up to .74, it shifts to 2nd and climbs to.78-.80,it shifts to drive and climbs to .82-.84 at about 90MPH. The article just says that .85-.90 volts at WOT is usually about right for most cars.If I punch it in 1st gear should it come right up to that reading?Its probably taking 14-15 seconds to come up to .84 !
Has any one had any luck tuning by this method? Talk to me out there.
Dave

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92RS LO3 700R4
open air element
ultimate TBI mods
LT1 cam
Edelbrock TBI performer manifold
180 thermostat
Hooker headers
3"cat back
Zexel Torsen posi with 3.42 gears

 

The O2 is only accurate at 14.7:1 AFR. Tune for HP not some O2 reading.

Tuning for some gauge reading is not the way. Tune for the fastest mph.

 

Brent is technically right but you can use your method to rough out a fuel curve if it is waaaay off to begin with. I believe that you are just seeing normal O2 reactions as the higher gears give longer time fr things to settle down and get good/richer info to our voltmeter.

ideally, you really need a Wide Band O2 instead of ours, OR, exhaust pyrometers, plug checks and dyno testing/race testing or combinations thereof, to get it done right... I use an Edelbrock LED O2 sensor to get my carbs right but have been doing it that way for so many years that it is pretty accurate for me.

 

Ya,I wish I would have bought a GTech before I started moding.It would have been fun to chart progress.The nearest track isn't all that close either.If I could pick up a used GTech reasonable I probably would.It would give me some kind of indication of changes.
Thanks Fastbroker for your help.
Dave

------------------
92RS LO3 700R4
open air element
ultimate TBI mods
LT1 cam
Edelbrock TBI performer manifold
180 thermostat
Hooker headers
3"cat back
Zexel Torsen posi with 3.42 gears