RMC List - Picnic

Mon Aug 15 14:38:03 EDT 2022

Yes to richen mixture these days and even more so on PG cars so timing can
be close to normal.

Stick cars at this altitude do well with ,052-.053.  PG cars like .053-.054.

Depends on spark plug heat range too.

I warned Mikey about pump location and rubber hose when he stopped by the
shop the other day.

Steve

On Mon, Aug 15, 2022, 12:14 PM MICHAEL PIPER via RMC-List <
rmc-list at corvair.org> wrote:

> My $0.02-
>
> The high alcohol fuel will boil if you look at it cross-eyed.  It also has
> more oxygen on it so to compensate you can make the fuel/air mix richer to
> cut down on detonation.  I have two 140 engines and they tend to detonate
> easily.  I don't know what jets I have but they are bigger than stock.
>
> In the mists of time, using leaded fuel, the old rule was to advance the
> timing 1/2 degree per 1000 feet of elevation, or 2 1/2 degrees at 5000
> feet.  That did not work well in my 140 engines.  I've had detonation
> issues so I'm pretty close to the book timing advance.
>
> Be very careful when putting rubber hoses in the engine bay.  If you loose
> a belt and cut a line, you have the makings of a fire if the pump keeps
> running.
>
> I've put electric fuel pumps in the front near the right front wheel or
> back by the left rear wheel.  If the pump is low in the system it does not
> need to suck fuel to speak of.  If it is the engine bay where Mikey's is it
> will need to lift fuel to the carbs.  If it's hot due to the engine plus
> you are sucking on the fuel, that could enhance vapor lock chances due to
> reduced atmospheric pressure.
>
> Regards,
>
> Mike
>
> On 08/15/2022 11:34 AM Paul Jarrett Sr <pjarrettsr at yahoo.com> wrote:
>
>
>
> Why would you increase jet size at higher altitude?
>
> On Monday, August 15, 2022 at 11:18:34 AM MDT, JOHN DAWSON via RMC-List <
> rmc-list at corvair.org> wrote:
>
>
> Mikey:
> all of the issues you mention could contribute to the surging, but it was
> a hot day and having the electric fuel pump inside the engine compartment
> could be a major contributing factor.
>
> Sounds like a vapor lock or a heat-related fuel issue, as what happened to
> me just two miles from home and my electric fuel pump is located up front
> near the tank; but is subject to all the heat radiating up from the hot
> asphalt pavement. The 10% ethanol in the fuels we have in the metro area
> does not help one bit either.
>
> Most important in setting the car up for 5280' elevation is to advance the
> ignition timing by about 3 - 5 degrees and maybe having larger jets in the
> carbs (go from 49 to 51). I've been able to get by with just advancing the
> ignition. And always spend the extra money on the 91 octane "Premium"
> fuel...even if it has ethanol in it.
>
> Make sure that you've replaced all the rubber fuel hoses with an
> ethanol-compliant hose (Gates 4219BG for instance) This is available at
> most auto parts stores (I've purchased it from O'Reilly's recently)
>
> The PowerGlide in of itself is probably not the main culprit other than
> it's just a two-speed transmission, and therefore does not allow for
> keeping the engine rpm up a bit when going uphill (unless it's in "L" and
> then the rpms may be a bit too high...)
>
> Hope this helps
>
> Be safe out there
> John Dawson
>
> On 08/15/2022 10:46 AM Mikey Spaulding <mspaulding166 at gmail.com> wrote:
>
>
> Interestingly, twice on my drive home while heading uphill, I had a sort
> of surging in the vehicle and seeming loss of power, almost like it was
> stalling out.  The last time it happened on Federal, I slowed down to about
> 30mph (not intentionally) before making it to the top of the hill.  Once
> past the crest, I had no more problems.  Any ideas as to what gremlin could
> cause this?  Would it be related to not having the carbs tuned to this
> elevation since bringing it from Minnesota, where my elevation was 912'
> asl?  Or is this more a transmission issue with the PowerGlide?
>
> Thanks for any help and ideas!
>
> Mikey
>
> On Sun, Aug 14, 2022 at 9:08 PM MICHAEL PIPER via RMC-List <
> rmc-list at corvair.org> wrote:
>
> My red Corsa has an Airtex solenoid style pump, the white car has a Carter
> vane style pump.  Both are low pressure pumps.  I think the problem with
> the red Corsa is the wiring in the engine bay vs the pump.  I wiggle the
> wires by the bulkhead connector and off it goes.  The problem has been very
> hard to duplicate sitting in the garage.
>
> Maybe I failed to pay my dues to the gremlin union.
>
> Hope this is a little helpful.
>
> Mike
>
> On 08/14/2022 8:54 PM JOHN DAWSON via RMC-List <rmc-list at corvair.org>
> wrote:
>
>
> That darn gremlin may have been passed over from Mike's car to my sedan...
> the electric fuel pump decided to take a coffee break as I was waiting at
> the light at Orchard and Broadway on the way home. was able to get the car
> to a safe place and 30 minutes later, the pump was back to work...and of
> course that was after calling AAA for a tow and letting Karen know that I'd
> be a little late getting home.
>
> BTW: what type of electric pump have you used on your daily drivers?
>
> Great to see you and Linea today.
>
> Be safe out there
> JD
>
> On 08/14/2022 5:04 PM Eric Schakel via RMC-List <rmc-list at corvair.org>
> wrote:
>
>
> Good time, good people, enjoyed the cars and company. Special thanks to
> Mike Piper, who once again did “Corvair gremlin” duty so the rest could
> drive trouble-free! And thank you, Dale, for getting this up so quickly!
>
>
>
> Eric S.
>
>
>
>
>
> *From:* RMC-List <rmc-list-bounces at corvair.org> *On Behalf Of *Dale N.
> via RMC-List
> *Sent:* Sunday, August 14, 2022 3:57 PM
> *To:* Corvair - RMC Email List <rmc-list at corvair.org>
> *Subject:* RMC List - Picnic
>
>
> Hello RMCrs,
>
> We got together for the Wilshire Memorial Picnic today.
> As usual, it was a combination of pleasant weather, almost too much food,
> and not enough conversation.
> Never seems to be enough time to catch up with everyone.
>
> If you were unable to attend, you missed a good time and we missed you.
>
> Check this link for a few photos from the gathering.
>
> https://www.rockymountaincorsa.org/2022-08-14-picnic/
>
> Dale
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>
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> property of the writer, please attribute properly.
> This list sponsored by the Corvair Society of America,
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>
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> property of the writer, please attribute properly.
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