[C2] Lead additive
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From: Canada's capital
2020 Corvette of the Year Finalist (appearance mods)
C1 of Year Finalist (appearance mods) 2019
Two additives I have proven to myself that work are Seafoam. I put that in a noisy lifter early LS motor and it was cured instantly. The second is an oil additive called Prolong. I know it works because in the winter at 30 below normal motors struggle to turn over, but with that slippery stuff in it, they spin over like it's summer. I was amazed at that stuff. I used it in my truck since it was new and it was running perfect at 325K KMS when I sold it. Never even opened the motor in that time. 
Race Director
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From: northern california
C2 of Year Finalist (track prepared) 2019
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Army
In the interest of full disclosure I've run some Marvel Mystery Oil through some engines (twice I think) to clear us some gummed-up, sticky lifters due to poor maintenance by previous owners.
I don't add anything on a regular basis...
I don't add anything on a regular basis...
Race Director
Joined: Apr 2015
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From: Fresno California
Come one, come all! Step right up and buy yourself your very own bottle of Fink's Wonder Tonic! It removes carbon. It cleans cylinders. It restores pep and vim and vigor to any motor. It re-vitalizes flat camshafts and lifters. It re-seals leaking gaskets. It flattens errant timing curves. It re-ignites Pertronic ignitions. Taken orally, it cures catarrh. It cures lumbago. It wrecks rheumatism. It consumes consumption. Yes, folks, for only $9.99, that's less than ten American dollars, you too can purchase a bottle of Fink's Wonder Tonic and be fully prepared for any future ills, automotive or biological!!
Racer
Joined: Jun 2008
Posts: 403
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From: Pittsburgh PA
. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing.
Volatility is a measure of the gasoline’s tendency to vaporize under a given set of conditions. Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. Boiling is a violent version of vaporizing. The higher the RVP, the greater the tendency to vaporize or vapor lock.
Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO"
Last edited by Brian Kotula; Apr 25, 2018 at 09:11 PM.
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From: Bowling Green, Kentucky
Come one, come all! Step right up and buy yourself your very own bottle of Fink's Wonder Tonic! It removes carbon. It cleans cylinders. It restores pep and vim and vigor to any motor. It re-vitalizes flat camshafts and lifters. It re-seals leaking gaskets. It flattens errant timing curves. It re-ignites Pertronic ignitions. Taken orally, it cures catarrh. It cures lumbago. It wrecks rheumatism. It consumes consumption. Yes, folks, for only $9.99, that's less than ten American dollars, you too can purchase a bottle of Fink's Wonder Tonic and be fully prepared for any future ills, automotive or biological!!
At least that was the name it had when I used it in 1964.
Larry
Team Owner
Joined: Aug 2007
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Army
Come one, come all! Step right up and buy yourself your very own bottle of Fink's Wonder Tonic! It removes carbon. It cleans cylinders. It restores pep and vim and vigor to any motor. It re-vitalizes flat camshafts and lifters. It re-seals leaking gaskets. It flattens errant timing curves. It re-ignites Pertronic ignitions. Taken orally, it cures catarrh. It cures lumbago. It wrecks rheumatism. It consumes consumption. Yes, folks, for only $9.99, that's less than ten American dollars, you too can purchase a bottle of Fink's Wonder Tonic and be fully prepared for any future ills, automotive or biological!!
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From: northern california
C2 of Year Finalist (track prepared) 2019
By your definition Anti-freeze will not effect water in the radiator.
. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing.
Volatility is a measure of the gasoline’s tendency to vaporize under a given set of conditions. Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. Boiling is a violent version of vaporizing. The higher the RVP, the greater the tendency to vaporize or vapor lock.
Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO"
. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing.
Volatility is a measure of the gasoline’s tendency to vaporize under a given set of conditions. Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. Boiling is a violent version of vaporizing. The higher the RVP, the greater the tendency to vaporize or vapor lock.
Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO"
Melting Slicks
Joined: Apr 2015
Posts: 3,090
Likes: 1,131
From: NEW YORK
Scientific results are often polluted by researcher bias.
I do not use lead additive. Stopped 25-30 years ago on the advice of someone much more learned in automotive engineering than I.
I can only offer my limited personal experience as evidence of it being useless and that is two presently owned SBC 60's vintage V8's both still on standard bore and no changes to cylinder heads. valves or valve seats and > 150,000 miles with zero fuel related malfunctions using regular pump gas.
I do not use lead additive. Stopped 25-30 years ago on the advice of someone much more learned in automotive engineering than I.
I can only offer my limited personal experience as evidence of it being useless and that is two presently owned SBC 60's vintage V8's both still on standard bore and no changes to cylinder heads. valves or valve seats and > 150,000 miles with zero fuel related malfunctions using regular pump gas.
Last edited by phil2302; Apr 26, 2018 at 08:37 AM.
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From: Ocean Township NJ
Last edited by 65tripleblack; Apr 26, 2018 at 08:43 AM.
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From: Various places in Southern California.
This same debate is going on over at the gymrat forum. Except they are talking about supplements.
The same unverified claims and, "it works for me" testimonials without any proof.
The same unverified claims and, "it works for me" testimonials without any proof.
Team Owner
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Army
More like, "OK, you were right for once, goddammit"
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By your definition Anti-freeze will not effect water in the radiator.
. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing.
Volatility is a measure of the gasoline’s tendency to vaporize under a given set of conditions. Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. Boiling is a violent version of vaporizing. The higher the RVP, the greater the tendency to vaporize or vapor lock.
Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO"
. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing.
Volatility is a measure of the gasoline’s tendency to vaporize under a given set of conditions. Reid Vapor Pressure (RVP) is a commonly used indicator of gasoline volatility. Boiling is a violent version of vaporizing. The higher the RVP, the greater the tendency to vaporize or vapor lock.
Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO"
You need to look at the ENTIRE distillation curve and focus on the mass percent of components that are boiling at any given temperature. Ethanol boils at about 170F and considerably increases the percent of components boiling in the 140-150 degree range.
Adding a pint or quart of heavy hydrocarbons to 20 gallons of fuel will have little effect.
Duke
Racer
Joined: Jun 2008
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From: Pittsburgh PA
Reid vapor pressure is measured at only one temperature - 100F. It's meaningful for cold starts and evaporative emissions considerations.
You need to look at the ENTIRE distillation curve and focus on the mass percent of components that are boiling at any given temperature. Ethanol boils at about 170F and considerably increases the percent of components boiling in the 140-150 degree range.
Adding a pint or quart of heavy hydrocarbons to 20 gallons of fuel will have little effect.
Duke
You need to look at the ENTIRE distillation curve and focus on the mass percent of components that are boiling at any given temperature. Ethanol boils at about 170F and considerably increases the percent of components boiling in the 140-150 degree range.
Adding a pint or quart of heavy hydrocarbons to 20 gallons of fuel will have little effect.
Duke
Then why fuel percolation without lead and no fuel percolation with lead in same driving conditions! I don't advocate the use unless you have a problem but facts are facts, just like anti-freeze.
Team Owner
Joined: Mar 2003
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From: Greenville, Indiana
Team Owner
Joined: Jan 2007
Posts: 53,648
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From: Southern Cal Ca
St. Jude Donor '22
i just had my heads off a 70 350/250hp redone.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
Melting Slicks
Joined: Apr 2015
Posts: 3,090
Likes: 1,131
From: NEW YORK
i just had my heads off a 70 350/250hp redone.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
i just had my heads off a 70 350/250hp redone.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
shop warned me that the exhaust seats are worn heavily
and expect to have them redone.
100k on motor, blown head gasket caused the
tear down. 194x160 valved heads.
so i am very interested in something for the exhaust valves.
hate to go lead but want to get as much time on valves as i can.
If the shop set your spring height correctly and ground the seats correctly, even if they were recessed some, I don't think you will notice anything wrong with your 250 hp engine. Just mo of course. Professional engine builders likely can prints pages where I am advising you wrongly.