I am told the lead content in 100LL is 4 times the auto gas when lead was a component of Auto gas. 100LL was a problem in my 2100D Revmaster. I had my heads redone for valve fowling and the rebuilder told me to get off the leaded gas, figure as Rev wants 100LL. Al ----- Original Message ----- From: "Wood, Sidney M." <smw...@titan.com> To: "KRnet" <kr...@mylist.net> Sent: Thursday, August 18, 2005 12:47 PM Subject: RE: KR> Re: Auto Fuel/Avgas
> One compound that refiners added to gasoline, both automotive and > aviation, was tetra-ethyl lead. This improved the anti-knock or > detonation properties for the high octane fuels such as 100, 115, 130, > etc. aviation fuels. The EPA banned the use of leaded fuels for > automotive applications and is pushing hard for the same ban on 100 LL. > Problems with leaded fuels are sticking exhaust valves and rings, burned > exhaust valves, corroded exhaust pipes and mufflers, fouled spark plugs > and plaque in carburetors and fuel injectors. Actually the EPA was not > concerned so much about engines and such, but what the free lead in the > exhaust emissions was doing to people. Problems cited were still borne > and deformed babies, and retarded kids from lead poisoning. Adults are > not immune from such nerve damage either. > > My understanding is there were no production engines designed to run on > leaded fuel per se. Rather the designs were for a specific octane fuel. > Compression ratio is the design parameter. The cheap way to get the high > octane fuel to perform correctly was to add the tetra-ethyl lead. > Refiners did figure out how to make high octane fuels work without the > lead, such as the automotive gasoline we use and pay dearly for today. > > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD, USA > sidney.w...@titan.com > > > -----Original Message----- > From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On > Behalf Of Allen Wiesner > Sent: Thursday, August 18, 2005 3:20 PM > To: KRnet > Subject: KR> Re: Auto Fuel/Avgas > > IIRC there "used" to be an lead? additive that could be added to gas for > engines that were designed to run on leaded fuel; does it still exist? and > if so, what is the name/maker? > _______________________________________ > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.338 / Virus Database: 267.10.12/77 - Release Date: 8/18/2005 > >
