Appreciate some input on spark plug reading

mderoy340 said
The heads are probably the limiting factor if your tune is optimized. I go down one jet size in May and another one down in July when it really gets hot and humid. The higher the humidity the lower amount of oxygen available to burn. My car runs best @12.4 flat fuel curve with the O2 sensor I currently have on 93 pump. Most folks just run pig rich all summer and dial slower.
You are at the mercy of whatever the quality the fuel is on the day you fill up. WaWa 93 is what I've been using lately. Find a station that sells a lot of fuel. Race gas is always the same quality so keep that in mind.
- Make sure your carb is sealed to the hood scoop to prevent hot under hood air from entering.
- A return style fuel system will keep the fuel and carb cooler.
- A dash camera mounted to view the important gauges helps to review after the run. (poor man's data log)
You may also want to calculate the converter slippage at the stripe in third gear. Wallace racing has all the formulas for that.

I also appreciate your input as I know you race quite a bit here in Florida. Perhaps one day I'll go over to Orlando Speedworld (think you race there?) instead of Gainesville to check it out. It's a bit over 100 miles which has kept me away so far!

As for fuel, you're spot on: I try to go where they turn it over alot. We have a WaWa and a Racetrac that are very, very busy so that's where I get fuel. "Back in the day," when I raced my Charger, I had to have a Cool Can on it or it would vapor lock every run. Kept that thing full of ice or bad things happened. This car does not have one and surprisingly, to date, has not shown it needs one for the past 2 summer seasons. BUT, it hasn't been through a Florida summer either!

My air cleaner sits right up in the 6-pack scoop but is not sealed so I'm sure it does get some of the underhood air. I'd like to get a GoPro type camera too. For now, I use my Autometer playback shiftlight to record the runs. It has a digital tach so I record all the staging, launch, and shifts after every run to make sure I'm not introducing variation through rpm differences.

Thx again!