Lead Replacer

Lead is a octane booster. Octane is a unit of measure of the anti-knock properties of fuel. The idea is to reduce pre-ignition, also known as "knocks". that is the condition of the fuel in the cylinder igniting too soon. (on the up stroke causing the engine to want to spin in reverse and hence the "knock". This puts a tremendous strain in the engine and is a big hit on power) pre-ignition it usually caused by hot spots in the cylinder, e.g. carbon deposits. A couple of ways to prevent this is to reduce compression or raise the octane. Hi performance engines tend to have high compression. An 9n, 2n and early 8n engine had a compression ratio of 6:1. That is considered a low compression ratio. later 8n's had a compression ratio of 6.5:1 also a low ratio. The RPMs are governed to 1500-2000. These engines are built for reliability, not performance. Therefore there is no need for lead in the fuel. I am not convinced the seats would benefit from the lead.

P.S. Continental and Lycoming make some very expensive engines for light aircraft. The compression ratios are slightly higher but the rated RPMs are 2,000- 2400. Also for reliability, not performance. But they still need to be overhauled after 2000 hours. The fords will go longer, if properly maintained.

Regards
Bill

• The Nation: History of Lead

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Had your tractor long?

They are fun, but must be respected.

Don't tell me my 8N has an emergency brake that I didn't know about?

Thanks,

Greg

I have tried it in the past and have not seen any change in performance.