Racepak O2 sensor

[Willyracer]

Thanks Adger
That is the way I always tuned my bracket car for years.
I never had an O2 reading to compare. Some time to
Much info causes a brain overload. Lol

Thanks again to everyone

David

[Jeff Stout]

Originally Posted by Adger Smith

When you get tired of reading what all the experts say... Go to the track and tune your engine where it is happy.
Best ET and MPH in the conditions available.
Then hook up your gauge and let it tell you what the A/F ratio is.
Your dealing with arbitrary numbers and your engine combination may not be happy with them.
I loved it when I was dyno testing and had customers tell me the EGT and AF had to be certain numbers to make power.
Their engines usually told them something different.
When making power most engines accelerate when slightly rich at peak Tq and run up toward lean at peak HP.
In the car I like slightly rich at the gear change to produce Tq and pull off the gear.

Totally agree. When I started data logging I was rich at gear change. Didn't know any better and went to work on making entire pass stay between 12 and 13to1. As I did the car was slower at 60 to 330 and also at 330 to 660 incrementials. Plugs looked good. Went back with around 10.5 area at bottom rpm of gear change and car came back around. Lesson learned.

[Steve Polhill]

Originally Posted by Jeff Stout

Totally agree. When I started data logging I was rich at gear change. Didn't know any better and went to work on making entire pass stay between 12 and 13to1. As I did the car was slower at 60 to 330 and also at 330 to 660 incrementials. Plugs looked good. Went back with around 10.5 area at bottom rpm of gear change and car came back around. Lesson learned.

Sometimes it needs a little more fuel to help it recover on the gear change. And often there is no reason at all for what it wants. Engines are like women. They want what they want. LOL

[KRatcliff]

Originally Posted by Steve Polhill

Sometimes it needs a little more fuel to help it recover on the gear change. And often there is no reason at all for what it wants. Engines are like women. They want what they want. LOL

This is true to a point, but replacement parts don't always cost a small fortune on engines and turning them on is generally pretty easy.

[SSDiv6]

Originally Posted by KRatcliff

This is true to a point, but replacement parts don't always cost a small fortune on engines and turning them on is generally pretty easy.

Especially with VP fuel...

[Adger Smith]

Beer VS Tequila
If they run on beer it could be cheaper...JS