Lead additive necessary ?

[Cobranut]

TRUE Tetraethyl Lead additives haven't been available for decades. That stuff is so hazardous in it's concentrated form I wouldn't dare handle it anyway.

Octane boosters are a ripoff. They're pretty much useless and even the best ones are misleading in their advertisements. What they call one "POINT' is actually 0.1 octane numbers, so you'd have to use TEN TIMES that amount to increase octane from 93 to 94.

The best way to boost octane is to mix in some 110 or 114 octane race gas. A 50% mix of 110 will take 93 to approx. 101 octane. Race gas is also still available with real tetraethyl lead, so it addresses the valve seat issue as well.

I run 66.6% CAM2 110 octane with 33.3% 93 pump gas in my 12.5:1 427 and it seems to work well.

I tried 100LL Avgas once and it wouldn't even idle well, much less run under load without ping. Avgas is optimized to work at high altitudes without vapor lock, so it doesn't vaporize well in automotive applications. It's octane is also calculated differently if I remember correctly.

Hope this helps.

Originally Posted by BAsque1

Well NYS still allows the sale of lead additives, they are available in places such as Autozone and Advance Auto parts. When it comes to gas I only use 93 octane plus Octane booster to 103.

I have never had a knock or ping since I have the car.I don't know if my valve seats are Stainless steel. I just changed the valve seals to cut down on the blue puff of smoke at 1st gear.

I have never used the lead additives in this car so I am just putting the question out since I was asked last week if I did or not. I am concerned thats all.
Tks for your input guys.
Sincerelyu
Basque1 (Lou)