hardened valve seats L78

[JBB]

Hello. Since the original L-78 was blown in our 69 SS Camaro
in 1984 doing a 12.49 Quarter mile, I am in the same position. After asking numerous shops about the valve dilemma, most engine builders want to have stainless valves and seats installed, especially if you have the 11. to 1 compression pistons that were stock in the L-78. I will have this done, as well as using the lead additive that is advertised by Jack Podell in Indiana. Unless you own a gas station that sells 114 octane leaded fuel, I think it is wise to have the heads done.........

[Seattle Sam]

Aviation gas works great, check out the small air fields around you - often they will let you fill containers. Or, you can "tank up" at the race track, or even buy your own 55 gallon drums of race gas. Your VP or Union 76 distributor may be able to help...all better than trying to deal with lead additives that are VERY poisonous!
-Sam

[JBB]

Hi Seattle Sam, I checked with a local airport here that caters to small aircraft, and they will not sell aviation fuel in cans or anyway else. Only to go in the planes. I don't know if it is a law here or just a airport rule, or they person I spoke with was not being hospitable....Joel

[Mr70]

On my L-78/TH400/4:10,I use regular Mobil 93 pump gas.Add 12 oz.of the Jack Podell Lead/Octane additive.Use Original AC R43T spark plugs and adjust timing.
No knock,stumbling or ping,Runs like a Wet Dream!
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[Seattle Sam]

Joel, I'm not sure how the local laws might apply. The airfield I go to, the pumps are unattended (self service) and accept credit cards. Luckily, it's not a very long walk from the pump to the gate with a couple of five gallon cans in hand! You might just want to scope out the local fields, maybe check with a friend who flies!
-Sam

[NEATSS]

I was always told that there is no road tax included in the price of avaition fuel. When you run avaition fuel in your car you are not paying your road taxes. The federal goverment takes a dim view of this. I have been told this comes with a $10K fine. That is probably why the folks at the airport were less than enthusiastic. Similar situations exist for diesel fuel and farm use.

[SS427]

My local airport sells me gas all the time. Their only rule is that it must be pumped into a can and used for off road use ONLY. That means race cars, drag boats, sleds, bikes, etc. I have never had trouble with them in 18 years.

[Denis]

Sam, which airport do you use to get your gas? I'm about a mile from Kenmore Air, that would be really convenient.