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09-03-2007, 08:55 PM
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CC Member
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Join Date: May 2003
Location: Hudson Valley NY,
NY
Cobra Make, Engine: Backdraft, 302, Tremec 3550. #038
Posts: 863
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Not Ranked
Trunk mounted fuel pump
Has anyone mounted their electric fuel pump in the trunk, is it a good idea? I have a Barry Grant 220 and mounted it inbetween the diff and rear cross member. It was the only protected spot under the car it would fit. Gear oil leaked out of the weep hole on the diff, after some tight cornering and sprayed on the pump which fried it.
The diff was filled to the proper level with RedLine synthetic (I did it outside of the car on a level surface) so I don't think it was overfilled. Anybody else experincing leakage from their weep hole?
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Kids in the backseats cause accidents, accidents in the backseat causes kids ! Good reason to get a Cobra !!!
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09-03-2007, 10:09 PM
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CC Member
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Join Date: Feb 2007
Location: Austin,
TX
Cobra Make, Engine: Lonestar Classics, 302 stroked to 347; Metallic British Racing Green
Posts: 595
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Not Ranked
Oh dear god...do NOT mount the fuel pump IN the trunk!!!!!!!!
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Cave magister imperitus - Beware the inexperienced teacher
"No, I DON'T have an accent, this is how English sounds when it is pronounced correctly!"
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09-03-2007, 10:36 PM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: Scottsdale,
az
Cobra Make, Engine: Bought an Exact carbon car in TX. Bought a 427 sideoiler with 630 HP
Posts: 1,714
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Not Ranked
WHY NOT?
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double ugly
The average fighter pilot, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy and caring. These feelings just don't involve anybody else.
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09-03-2007, 10:40 PM
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CC Member
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Join Date: Feb 2007
Location: Austin,
TX
Cobra Make, Engine: Lonestar Classics, 302 stroked to 347; Metallic British Racing Green
Posts: 595
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Not Ranked
ROFL...looks FABULOUS, seriously, looks really good, I just don't know if I want my luggage THAT close to the fuel pump...LOL
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Cave magister imperitus - Beware the inexperienced teacher
"No, I DON'T have an accent, this is how English sounds when it is pronounced correctly!"
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09-03-2007, 10:45 PM
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CC Member
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Join Date: Aug 2003
Location: San Diego,
CA
Cobra Make, Engine: BDR #455, KC427W, TWM-FI
Posts: 727
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Not Ranked
Does TWA800 ring a bell? Fuel vapors form in closed spaces. Fuel vapors go boom.
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09-04-2007, 07:40 AM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Not Ranked
Gas lines should never be run inside any car. Way to dangerous ... but any Cobra is dangerous by design 
The BEST location for an electric fuel pump is below (or as low as possible) and behind the fuel tank. This way, gravity and your forward motion increases the "pressure" at the fuel pump inlet.
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Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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09-04-2007, 08:39 AM
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CC Member
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Join Date: May 2005
Posts: 379
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Not Ranked
a quality, good looking installation. I know of several racing applicaions where fuel lines, cells, and pumps are in far more dangerous locations. just for example, in many boats, engines and fuel pumps and lines, are all located in closed areas....there are no vapors from a closed system (unless there is a leak). there is no combustion source in a trunk. Externally mounted pumps are far more likely to leak or get damaged by the road than this application will. Great job my man!
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09-04-2007, 09:53 AM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: Scottsdale,
az
Cobra Make, Engine: Bought an Exact carbon car in TX. Bought a 427 sideoiler with 630 HP
Posts: 1,714
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Not Ranked
cbreez, thanks. I had Roger Bolick do the install before I picked the carbon car up. He does very good accurate work.
John
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double ugly
The average fighter pilot, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy and caring. These feelings just don't involve anybody else.
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09-04-2007, 08:06 PM
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CC Member
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Join Date: Dec 2006
Cobra Make, Engine: CSX 4000; Shelby aluminum FE with 58mm IDAs
Posts: 1,116
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Not Ranked
Yes, original Cobras...
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09-04-2007, 08:26 PM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: Scottsdale,
az
Cobra Make, Engine: Bought an Exact carbon car in TX. Bought a 427 sideoiler with 630 HP
Posts: 1,714
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Not Ranked
CSX 3020
__________________
double ugly
The average fighter pilot, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy and caring. These feelings just don't involve anybody else.
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09-05-2007, 05:06 AM
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CC Member
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Join Date: Oct 2006
Location: Philly Suburbs,
PA
Cobra Make, Engine: BDR#436 - 351W - 450HP / 429TQ
Posts: 242
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Not Ranked
Quote:
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Originally Posted by cbreez
a quality, good looking installation. I know of several racing applicaions where fuel lines, cells, and pumps are in far more dangerous locations. just for example, in many boats, engines and fuel pumps and lines, are all located in closed areas....there are no vapors from a closed system (unless there is a leak). there is no combustion source in a trunk. Externally mounted pumps are far more likely to leak or get damaged by the road than this application will. Great job my man!
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I'd have to disagree with this one. Boats are designed to venilate the fuel/motor areas. Also, our batteries are in the trunk. You're right...there are no vapors unless there is a leak...and there is no spark unless the battery cable comes loose. I'd keep the the pump outside.
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Eric
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09-05-2007, 06:48 AM
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CC Member
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Join Date: May 2005
Posts: 379
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Not Ranked
hmmmm,you know that's a real common scenario....a leaking fuel pump at the same time a battery cable comes loose....
if one thinks about every hypothetical thing that could go wrong in life, even extremely unlikely things...why bother getting out of bed in the morning.
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09-05-2007, 06:51 AM
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CC Member
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Join Date: Jan 1999
Location: Whitehouse Station,
NJ
Cobra Make, Engine: SOLD: 2013 Boss 302 Mustang #2775 (both options). SOLD: 95 Mustang Cobra R #4 of 250 "Rosie's Diner" car. SOLD: CCX2-2505, #5 of 7 289 FIAs ever produced at Contemporary! my first Cobra: Unique 427SC w/ 428CJ moder!
Posts: 5,438
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Not Ranked
...and you NEED an electric fuel pump??????
...I know they look and sound cool, but why does everyone insist on using one? Do you REALLY NEED one?
I was going to install one in my 289 and then figured staying with a mechanical unit. These cars are dangerous enough already, if you get in an accident, the electric pump will keep on pumping fuel instead of shutting down the flow like a mechanical pump would.
JMHFO.
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REMEMBER....In Case of Spin....Both Feet in!!!!!
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09-05-2007, 06:56 AM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Northport,
NY
Cobra Make, Engine: Kirkham, KMP178 / '66 GT350H, 4-speed
Posts: 10,362
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Not Ranked
Quote:
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Originally Posted by Stentor
Yes, original Cobras...
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Not all of them did, just the handful of Race Cars (Comp and S/C) had the electrics.
...the rest of the fleet just ran with the mechanical pump. |
09-05-2007, 07:01 AM
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CC Member
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Join Date: Jan 1999
Location: Whitehouse Station,
NJ
Cobra Make, Engine: SOLD: 2013 Boss 302 Mustang #2775 (both options). SOLD: 95 Mustang Cobra R #4 of 250 "Rosie's Diner" car. SOLD: CCX2-2505, #5 of 7 289 FIAs ever produced at Contemporary! my first Cobra: Unique 427SC w/ 428CJ moder!
Posts: 5,438
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Not Ranked
Quote:
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Originally Posted by cbreez
hmmmm,you know that's a real common scenario....a leaking fuel pump at the same time a battery cable comes loose....
if one thinks about every hypothetical thing that could go wrong in life, even extremely unlikely things...why bother getting out of bed in the morning.
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Don't discount the impossible...
I have seen trunk mounted batteries shift in two separate Cobras and spark.
I have seen a poorly placed battery cable ground out on the rollbar and spark.
Sh*t does happen.
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REMEMBER....In Case of Spin....Both Feet in!!!!!
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09-05-2007, 08:23 AM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: Scottsdale,
az
Cobra Make, Engine: Bought an Exact carbon car in TX. Bought a 427 sideoiler with 630 HP
Posts: 1,714
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Not Ranked
Quote:
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Originally Posted by cbreez
hmmmm,you know that's a real common scenario....a leaking fuel pump at the same time a battery cable comes loose....
if one thinks about every hypothetical thing that could go wrong in life, even extremely unlikely things...why bother getting out of bed in the morning.
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Battery's not in the trunk. 
__________________
double ugly
The average fighter pilot, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy and caring. These feelings just don't involve anybody else.
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09-05-2007, 09:38 AM
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CC Member
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Join Date: Sep 2007
Location: georgetown,
ont
Cobra Make, Engine: Most likely D&D,302 stock for now
Posts: 8
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Not Ranked
Personnaly i would mount the pump OUTSIDE any confine space and as low as possible so if it leaks the fumes would not get trapped and it would leak on the ground instead of running inside the trunk and seeping on electrical connections.
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09-05-2007, 09:51 AM
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CC Member
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Join Date: May 2007
Cobra Make, Engine: CSX4000 w/CSXblock
Posts: 77
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Not Ranked
I have to agree w/using a mechanical pump VS the electric on the Backdraft. As mentioned earlier in the thread, there is a safety issue w/the electric pump running after an accident.
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09-05-2007, 10:26 AM
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CC Member
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Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
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Not Ranked
. . . and Murphy's Law always rules. Why complicate things in the name of eye candy? Yes, it's best to push gas, but if there's no chance of vapor lock, go with the KISS principle.
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Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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09-05-2007, 12:24 PM
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CC Member
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Join Date: Mar 2006
Location: San Marcos california,
CA
Cobra Make, Engine: 1989 KCC from South Africa Right Hand Drive
Posts: 1,601
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Not Ranked
I have to agree that a pump outside the trunk is way beter (MO).I ran a mechanical pump forever and never had any problems what so ever. In my wisdom I changed to an electric pump,mounted to the frame near the rear suspension,and every time I drive the car I worry about the high pressure in the line from the rear of the car and the fact that now I have another source of leaks to worry about on the engine, the pressure regulator. I will be taking the electric pump off and reinstalling the mechanical pump shortly.A much safer scenario all around.So much of the "Hot aftermarket Products" that a lot of us are duped into buying,like fancy ignitions etc, have absolutely no benefit at all other than bling,and of course adding more weight to your car.Simple ,light and reliable,thats my motto!!!
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