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[GMCnet] Corvairs can run on E85 [message #209672]

Sun, 02 June 2013 23:37

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

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I know some people that have Corvairs that run well on E85 with only a minor main jet, and timing changes. And Corvairs were not affected with the mandate of unleaded gas. Unleaded gas is better for them then leaded gas was. Bob Dunahugh
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Re: [GMCnet] Corvairs can run on E85 [message #209716 is a reply to message #209672]

Mon, 03 June 2013 10:52

Matt Colie

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BobDunahugh wrote on Mon, 03 June 2013 00:37

Bob,
Those are two very different problems.

As soon as an engine has hardened inserts for valve seats (almost all AL heads do), they can run unleaded with no issue.

As soon as you are willing to make an alcohol tolerant fuel system and recalibrate the engine, you can run virtually any spark ignition engine on any alcohol blend. We even ran a Buick Regal on neat methanol. You just have to be ready for the fuel consumption penalty.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
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Re: [GMCnet] Corvairs can run on E85 [message #209739 is a reply to message #209672]

Mon, 03 June 2013 15:14

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

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Yes Matt. There are two different issues here. The point was that there were some older vehicles that had features that made them more adaptable to modern changes. Until the advent of unleaded gas. Most vehicles prior to 1972. Didn't have hardened valve seat inserts, as they do now. Alum heads were not vary common back then. Flame hardened valve seats like we have in our GMC's filled the gap between iron valve seats, and hardened valve seat inserts. Bob Dunahugh

I know some people that have Corvairs that run well on E85 with only a minor main jet, and timing changes. And Corvairs were not affected with the mandate of unleaded gas. Unleaded gas is better for them then leaded gas was. Bob Dunahugh
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Re: [GMCnet] Corvairs can run on E85 [message #209756 is a reply to message #209739]

Mon, 03 June 2013 19:17

Matt Colie

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BobDunahugh wrote on Mon, 03 June 2013 16:14

<snip>
Unleaded gas is better for them then leaded gas was.
Bob Dunahugh

Bob,

The ONLY reason for tetra-eythyl lead was to improve octane. The price we paid for it was well past diminishing return in my book. In those times, I had several cars that were hard pressed to get 5K miles out of a set of spark plugs and lets just not go into the lead fouling in combustion chambers and valves.

Matt

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Re: [GMCnet] Corvairs can run on E85 [message #209760 is a reply to message #209756]

Mon, 03 June 2013 19:48

Ronald Pottol

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Registered: September 2012
Location: Redwood City, California

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It's a lot worse than that, the reduction of lead in gas correlated with
the murder rate falling in half over the past decades, it accounts for 90%
of it. A rather strong corroralion.
http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline

On Mon, Jun 3, 2013 at 5:17 PM, Matt Colie <matt7323tze@gmail.com> wrote:

>
>
> BobDunahugh wrote on Mon, 03 June 2013 16:14
> > <snip>
> > Unleaded gas is better for them then leaded gas was.
> > Bob Dunahugh
>
> Bob,
>
> The ONLY reason for tetra-eythyl lead was to improve octane. The price we
> paid for it was well past diminishing return in my book. In those times, I
> had several cars that were hard pressed to get 5K miles out of a set of
> spark plugs and lets just not go into the lead fouling in combustion
> chambers and valves.
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumi�re (say show-me-air)
> Now with 4 working Rear Brakes
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>

--
Plato seems wrong to me today.
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