Racepak O2 sensor

FireSale · 06-23-2020, 01:29 AM

13.8 is rich by around one point. Perfecto is 14.7.

Dave Noll · 06-23-2020, 07:17 PM

Quote:

Originally Posted by FireSale

13.8 is rich by around one point. Perfecto is 14.7.

14.7:1 is only perfect for a street car on pump gas. It is a compromise that a few different factors meet @ to be stoichometric. (for emissions to make the catalytic converter work its best) USUALLY, when you mash the gas you want the AFR to drop to around 12:1 - 13:1. Different manufacturers and different cyl head designs, compression ratio's and probably several other factors determine where an engine makes its best power @.

18:1 works for mileage but sucks for power, if you can keep the fire lit.

https://x-engineer.org/wp-content/up...io-300x296.jpg

FireSale · 06-24-2020, 10:38 AM

Quote:

Originally Posted by Dave Noll

14.7:1 is only perfect for a street car on pump gas. It is a compromise that a few different factors meet @ to be stoichometric. (for emissions to make the catalytic converter work its best) USUALLY, when you mash the gas you want the AFR to drop to around 12:1 - 13:1. Different manufacturers and different cyl head designs, compression ratio's and probably several other factors determine where an engine makes its best power @.

18:1 works for mileage but sucks for power, if you can keep the fire lit.

https://x-engineer.org/wp-content/up...io-300x296.jpg

Thanks. That got me to read more.
https://x-engineer.org/automotive-en...e-performance/

Dave Noll · 06-24-2020, 06:35 PM

Quote:

Originally Posted by FireSale

Thanks. That got me to read more.

If you want to read more, try some of David Vizard's stuff.

06-23-2020, 01:29 AM	#1
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: Racepak O2 sensor 13.8 is rich by around one point. Perfecto is 14.7. __________________ Dale Shearon 68 Mustang 6394