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Leaded gas?
Posted by: mark60609 ()
Date: August 13, 2019 06:07PM

Of course when our Coravirs were new, they burned leaded gas. What happens to the engine if we do not use leaded gas today?

Mark
'64 Monza Coupe

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Re: Leaded gas?
Posted by: Vin ()
Date: August 13, 2019 06:23PM

Nothing. I believe the experts will tell you the Corvair valve seats were hardened well enough in stock form to handle the higher engine temps that they do just fine in modern times with no lead. Another bonus for the Corvair as a drivable classic!


Vin
Dayton, OH
1965 Corvair Monza Convertible (4 speed)

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Re: Leaded gas?
Posted by: Frank DuVal ()
Date: August 13, 2019 06:54PM

Well, yes, Corvairs never had cast iron heads with the valve seats just machined in them. We have aluminum heads with steel seats, therefore all Corvairs have hard valve seats (hard compared to cast iron).smileys with beer

Besides, we had unleaded gas back in the 60s, Mobilgas and Amoco premium were both unleaded!

Frank DuVal

Fredericksburg, VA

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Re: Leaded gas?
Posted by: jjohnsonjo ()
Date: August 13, 2019 07:10PM

What lead does for a Corvair is collect in the oil sump and shorten spark plug life.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Leaded gas?
Posted by: playerpage ()
Date: August 13, 2019 10:35PM

On that note--what is the group consensus on high-end (like VP racing fuel) octane boosters. What is the group consensus on low-end (like STP) ones?

____________________________________________

Eric C. Player, Porterville, CA
Member: CORSA National, Central Coast CORSA, South Coast CORSA, and San Joaquin Valley Corvair Club
THEN: 1965 Monza 110 Canary Yellow
1967 Monza 140 Red
1966 500 110, Black
1965 Monza 110, Camaro Yellow
NOW: 1966 Corsa 180 Turbo, Blue.

"It would not have helped if I had [taken notes], as he would start a paragraph with, 'It is therefore obvious. . .' and go on from there to matters which may have been obvious to him and God but to no one else." -- Daniel B. Davis

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Re: Leaded gas?
Posted by: MattNall ()
Date: August 13, 2019 11:06PM

My opinion ... Fool's Juice!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Leaded gas?
Posted by: dolomitefan ()
Date: August 14, 2019 01:31AM

Unleaded fuel does have different burn characteristics than leaded, it tends to burn hotter and be more volatile. It also tends to have a lower octane rating so sometimes the ignition needs to be retarded a little to stop pinking.

I know your octane system over there is slightly different than here. Our typical regular fuel is 95 Octane whereas what we call super tends to be 97 or 98. Old leaded fuel here was 99-100. As I have no idea how US octane ratings compare this is probably a slightly meaningless figure to you!

---------------------------------------------------------------
Mark Gibson, Staffordshire, England

1961 Corvair Greenbrier
1980 Triumph Dolomite Sprint
2009 Mazda MX5
2018 Infiniti Q30

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Re: Leaded gas?
Posted by: playerpage ()
Date: August 14, 2019 10:21AM

Fools juice like it is useless and doesn't help at all to improve performance or protect an older engine as advertised, so it is simply money wasted? Or fool's juice because it will actively ruin an engine, instead of helping it?

____________________________________________

Eric C. Player, Porterville, CA
Member: CORSA National, Central Coast CORSA, South Coast CORSA, and San Joaquin Valley Corvair Club
THEN: 1965 Monza 110 Canary Yellow
1967 Monza 140 Red
1966 500 110, Black
1965 Monza 110, Camaro Yellow
NOW: 1966 Corsa 180 Turbo, Blue.

"It would not have helped if I had [taken notes], as he would start a paragraph with, 'It is therefore obvious. . .' and go on from there to matters which may have been obvious to him and God but to no one else." -- Daniel B. Davis

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Re: Leaded gas?
Posted by: MattNall ()
Date: August 14, 2019 10:51AM

High Octane gasoline is no better than the 80 octane Richard1 uses in Bolivia...

Octane rating is only the resistance to Pinging... needed in engines with higher compression ratios... not our 8.5 - 9.25 ratios!

Only when your turbo is under BOOST do YOU need it! and 91 is usually sufficient.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Leaded gas?
Posted by: joelsplace ()
Date: August 14, 2019 11:05AM

My 84 takes mid grade to avoid ping and most say 140s need premium I've never tried less in a 140. I've run 102s that needed premium. It also depends on your altitude, how hot and if you have A/C.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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