696969
Well-Known Member
Anyone know if I can get away with just putting 87 octane in the tank, or should I always do 91? What about a Lead additive? It's a 318 2BBL.
Thanks in advance!
Thanks in advance!
318 Fuel/Lead requirements?
- Thread starter 696969
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RustyRatRod
Well-Known Member
If your 318 is past 1972 it has hardened seats. Even if it doesn't, unless you're haulin loads or doing some severe racing it won't hurt a thing.
YY1
Well-Known Member
M7 73 has just a bit of spark knock under a "lugging" type of load.
(IE, if you give it more gas, it goes away)
I've been trying to get rid of it via timing adjustments and plug gap.
If I put 1/2 tank of 87 and 1/2 tank of 89, it seems to help.
(IE, if you give it more gas, it goes away)
I've been trying to get rid of it via timing adjustments and plug gap.
If I put 1/2 tank of 87 and 1/2 tank of 89, it seems to help.
RustyRatRod
Well-Known Member
I know this sounds ridiculous, but please trust the old boy. Get something simple to pour water from. I always used a coke bottle back in the day. Fill it up with water. 12-16 ounces is fine. Remove the air cleaner and with the engine running, dribble the water slowly through the carburetor. You'll have to finesse the throttle to keep it running.....it actually works best up around 2K. This will produce steam in the cylinders and clean them out good. You may have carbon buildup in the cylinders. Carbon buildup does two big things to produce detonation. 1), It raises compression. But that's not the biggest thing. People think it is, but it's not. The biggest thing is 2), Carbon buildup holds heat. So much so that it glows much like coals in a fire. THAT is what helps aid detonation.
When you gently pour water through the engine, it will super heat and steam the combustion chambers and back sides of the valves clean. The faster RPM the better. Usually 2000-2500 works good. Pour slowly, because you certainly don't want to hydrolock the engine. That would suck. It's an old school trick and I know it's a new world....but it still WORKS.
When you gently pour water through the engine, it will super heat and steam the combustion chambers and back sides of the valves clean. The faster RPM the better. Usually 2000-2500 works good. Pour slowly, because you certainly don't want to hydrolock the engine. That would suck. It's an old school trick and I know it's a new world....but it still WORKS.
You are correct and sure are old school.My Father in law had a old Lincoln that he would drive about 3 miles at a time at slow speeds on back country roads so top speed was about 40. Every few months we had to do that to the 460 engine because it would carbon up. X2 it works,,,.
WP29440SE
Well-Known Member
i accidently shot two giant black patches on the old mans garage door with a 73 440 back in the day, frickin hilarious lol
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