I failed to mention that I have the electric pump wired with a toggle kill
switch in the event of an emergency or accident. It is just to the left of the
power antenna toggle switch under the dash to the right of the ignition
switch. 300’ly, Rob Kern
Sent: Wednesday, July 05, 2017 3:01 PM
Subject: RE: [Chrysler300] ethanol-eaten fuel
pumps
Good
conversation on electric vs mechanical fuel pumps or a combination of
both. If converting to just an electric pump, one of the
concerns that has been mentioned on this list in the past is the (perceived)
need for a rollover kill switch for the pump. That is, newer cars with only an
electric pump, have a switch that turns the pump off if the car rolls over,
thereby stopping the flow of fuel as a safety measure. I
don't have an opinion on the need for it, but would like to hear what others
think. I believe the likelihood of a rollover with our cars
is very low, in fact I have never heard of that happening by any club member,
but with a mechanical pump, when the engine stops, so does the flow of
fuel. Comments?
Bob
J
300G with
push button electric fuel pump for priming only
From: Chrysler300@xxxxxxxxxxxxxxx
[mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of 'Jack Boyle'
jackcboyle@xxxxxxxxx [Chrysler300]
Sent: Wednesday, July 05, 2017
12:43 PM
To: 'RON WATERS' <ronbo97@xxxxxxxxxxx>;
'chrysler300@xxxxxxxxxxxxxxx'
<Chrysler300@xxxxxxxxxxxxxxx>
Subject: RE: [Chrysler300]
ethanol-eaten fuel pumps
I have learned the hard way that
old style pumps in perfect condition have a hard time sucking today’s fuels. I
am blaming 90% of vapor lock problems on the fuel. This combined with cold
cranking concerns and the fact my cars may not get driven for weeks, I am
converting to electric pumps near the tank and dummy fuel pumps on the block
where the fuel is just routed straight thru.
The first car I did this on 5
years ago is 6v and slow cranking, now – one pump of the pedal and it starts
right away, every time.
…Jack
---------- Original Message
----------
From: "RON WATERS ronbo97@xxxxxxxxxxx [Chrysler300]"
<Chrysler300-noreply@xxxxxxxxxxxxxxx>
To: "Carlton Schroeder'
schroe99@xxxxxxxxxxxx [Chrysler300]"
<Chrysler300-noreply@xxxxxxxxxxxxxxx>
Cc:
chrysler300@xxxxxxxxxxxxxxx
Date: July 5, 2017 at 1:28
PM
Subject: RE: [Chrysler300] ethanol-eaten fuel
pumps
So from reading this lengthy thread, there seems to be two problems: the
main one being that fuel pumps were leaking due to gasket/diaphragm failure
and a second problem being vapor lock. Rather than jury-rigging one or more
electric fuel pumps, I would suggest rebuilding the original Carter fuel pump
with modern gaskets from Then and Now. To solve the vapor lock issue, I would
wrap the fuel line in some heat shielding material.
Ron
On July 5, 2017 at 11:18 AM
"'Carlton Schroeder' schroe99@xxxxxxxxxxxx [Chrysler300]"
<Chrysler300-noreply@xxxxxxxxxxxxxxx>
wrote:
Good morning,
Another approach (but it will not get by the
concours judges) that works for the 1st generation Hemi is to
install a spacer / adaptor that allows 273 - 360 size block fuel pumps to be
installed. Those fuel pumps are readily available at auto parts
stores. Hot Heads (for one) sells the spacer. That approach has
worked fine for me, although we are also fortunate to have ethanol-free gas
readily available in this area (northern Wisconsin).
Carlton
I
love it! Got those concours judges..didn’t you?! Have a Happy
and Safe 4th! Rob
Sent: Tuesday, July 04, 2017 7:50
PM
Subject: RE: [Chrysler300] ethanol-eaten fuel
pumps
Rob,
When I revised my 300H, I did the same thing you did.
I carried it one step further by “modifying” my mechanical fuel pump. I
removed the pump, removed the pump arm, and filled the inside area where the
pump arm pivots with PC7 (two-part epoxy mixture). I made a gasket to cover
the whole pump where it seats on the block, and re-installed the pump. I
connected the fuel lines to the “dummy” fuel pump to make it look original.
It never gave me any problems.
Mark
ANATHEMA!! I gave my 300C fuel
pump that worked swell to John Begian for his C project for the cost of
shipping and replaced it with a 5 psi electric pump from Hemi Hot
Heads. It is a non-racing pump that is engineered for dual carb
hemis. I located it on the frame rail where I had my electric priming
pump in front of the passenger rear wheel with a stone guard beneath
it. I insulated it from the frame rail with a rubber pad so it doesn’t
make a racket like a woodpecker on the roof. The major reason was
vapor lock. The 392 mechanical pump is just beneath the exhaust
manifold and the metal lines go right next to it on the rise to the front
fuel bowel and hug the water pump area for the upper radiator hose
connection. I am fortunate to purchase ethanol free unleaded 91 octane
easily in Lawton, Oklahoma. Still modern fuels burn up to 200 degrees
F hotter than the ones formulated back in the time of the early letter
Cars. There is a reason that fuel pumps I now realize are in gas tanks
or away from the engine compartment . Probably the vapor reclamation (EGR?)
circuit in modern vehicles has something to do with the location also.
Soooo.... the engine starts up immediately since the pump turns on when
ignition key turned to on before engaging the starter, pure gas, no
diaphragms to fail (near and dear to a soon to retire gyn, 27 days to go),
and smooth driving at all speeds and all temperatures without any
hiccups. You purists can do your thing, but here is a solution that
works well but is not concours correct. Rob
Kern
Sent: Tuesday, July 04, 2017 1:46
PM
Subject: Re: [Chrysler300] ethanol-eaten fuel
pumps
Maybe I'm just lucky. I've been dealing with fuel
system adversities for more than 50 years and I don't find things to be a
great deal worse now than in the past. I've not checked the alcohol
content in local fuels in a long time now, but I suspect that here in
Florida we still have less of it than in many parts of the country.
Between 1995 and about 2004 I never saw local content to be greater than
about 6percent (measured with a rather crude test device, careful
monitoring required because of 2-stroke sensitivity). My sense of
smell is not very acute, but it seems that now we have less ethanol than at
some times in the past because I hardly smell it at all now most of the
time. A few months ago I disassembled the fuel pump on my C300
just to make certain that it was still in good shape before driving to
Wisconsin. What I found was no noticeable deterioration of the
diaphragms and it remained clean and corrosion free internally. The
pump was a new Airtec from Carquest in 2008. I drive the car a little
bit almost every day, refuel it about once a month, and have now accumulated
just over 21,000 miles since I started driving it. There's little for
me to complain about.
---------------Marshall
Goodknight
__._,_.___
Posted by: "Rob Kern" <robkern@xxxxxxxxxxxxx>
To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx
To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or
go to https://groups.yahoo.com/neo/groups/all/manage/edit
For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm
For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
![]()
__,_._,___
|
Back to the Home of the Forward Look Network
Archive Sitemap