Thread: 78 Trans Am getting some love

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Watch the timing for detonation at WOT, 39° is pushing it and may actually lose power.

I did notice that it lost some pull at that point,no detonation though. I will bring it back down to 35

Good job on the vacuum. AFR gauges are great! Just remember a miss fire will read lean, always check and read the plugs.

When reading the plugs, how long must it be driven to get a good reading on the plug? Once it's read and you change a setting, do you put new plugs in every time?

Originally Posted by 53 Chevy5

When reading the plugs, how long must it be driven to get a good reading on the plug? Once it's read and you change a setting, do you put new plugs in every time?

You'll be able to see changes pretty quickly. With the AFR gauge we'll stick with same plugs for now, just need to confirm what the gauge is telling us. After it's dialed in, new plugs and a fresh read.