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8/3/10 5:33pm - Original Message: 'Confused on fuel system...'
new77guy
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henderson, NV - USA

Vette(s):
1977 Corvette l48 Custom

Joined: 2/7/2004
Posts: 715
Hey guys,

I am just a tad bit confused on the fuel system.

Here are the pics in the assembly manual from the factory...



What it appears to be is on the PASSENGER or RIGHT side there are TWO steel lines
ONE I imagine goes to the PUMP, then using the outlet from the pump another stainless line to the CARB. The SECOND line that is to the tank on that side attaches to ANOTHER inlet of the PUMP (AM I RIGHT)? THEN BACK TO THE TANK FOR OVER FLOW (AS THIS IS MECHANICAL AND GRAVITY FED)?

BUT THEN THERE APPEARS TO BE TWO MORE LINES ON THE DRIVER SIDE! LEFT!
FROM THE TANK TO THE VAPOR CAN. THE VAPOR CAN CONNECTS WHERE? WHAT DOES THE SECOND LINE DO?
I can easily get around emissions... so can i just remove the the VAPOR can, and lines from the LEFT or DRIVER side? can't I just use a VENTED gas cap to evenly pressurize the system? Where do the lines connect on the passenger side? On the filler neck? and then there should be an opening round hole to connect the vapor return line?

PLEASE NOTE I PLAN ON USING A HOLLY BLUE ELECTRIC FUEL PUMP!
NOT THE MECHANICAL!


Thanks for any help guys..
-Louis






new77guy2010-08-03 14:42:59

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8/4/10 2:23pm - Reply: 'Confused on fuel system...'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
Everything on the left side is for the vapor recovery system  You are correct that you can use a vented cap and remove all of that, although you will no longer be emissions legal ( I had to add that to cover my A$$).  The main feed line on the right is all you need if your fuel pump and pressure regulator do not need a return.  The small line is for excess fuel return, and just dumps back into the tank.

Larry


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8/4/10 7:04pm - Reply: 'Confused on fuel system...'
new77guy
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henderson, NV - USA

Vette(s):
1977 Corvette l48 Custom

Joined: 2/7/2004
Posts: 715
where can I get a vented cap for this car? And the other ? is where can I get the reproduction fuel lines that I need. And can some one sell me the fuel pump / regulator? I cna;t find the ones I bought a long time ago.. I know you got em Larry ;)

Thanks again sir...


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-LOUIE

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8/4/10 7:22pm - Reply: 'Confused on fuel system...'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
I did exactly what you described Louis. I bought my vented gas cap from PepBoys and spliced in braided lie onto the hard lines near the firewall...

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8/5/10 12:35pm - Reply: 'Confused on fuel system...'
VetteSpecialties
Former Member
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
Your best bet for electric fuel pumps is Jegs or Summit.  We can get you the correct main fuel line.  You cannot run it in it's correct location without taking the body off the frame, but you can re-route it a bit and make it work.  If you are doing all this, you might want to buy larger diameter aluminum tubing, and bend your own.

Larry


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8/5/10 1:33pm - Reply: 'Confused on fuel system...'
new77guy
Former Member
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henderson, NV - USA

Vette(s):
1977 Corvette l48 Custom

Joined: 2/7/2004
Posts: 715
Hey Larry...
I was just looking at the diagram and I thought to myself yea... The body has to come off again. I already took the body off, cleaned the frame and put poly body mounts in place. So taking the body off again is stupid. Whats the best way to blow out the line?


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8/5/10 2:32pm - Reply: 'Confused on fuel system...'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
ok, while we are on the subject.  I got a raw gas smell in the corkpit at times.  No visible fuel leaks.  Should I be concerned with changing the canister?  It is the original as far as I  know.  After running awhile, if I put the car in the garage right away, the smell of gas will knock you over!!!
Dan
WackoDead


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8/6/10 2:07pm - Reply: 'Confused on fuel system...'
VetteSpecialties
Former Member
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
My first suspicion is the carburetor oozing just enough to smell, but not visible.  Otherwise, it could be a leak anywhere in the evaporative recovery system.

Larry


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8/6/10 9:23pm - Reply: 'Confused on fuel system...'
anips
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe

Joined: 8/9/2002
Posts: 783
MIGHT CONSIDER LEAVING VAPOR LINES ON THE CAR IN CASE YOU SELL THE CAR OUT OF STATE, CALIF REQUIRES THE SELLER TO BE RESPONDSIBLE FOR CAR TO PASS SMOG AT TIME OF SALE

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8/6/10 10:57pm - Reply: 'Confused on fuel system...'
dskopp
Former Member
- Send Private Message


Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
Larry,
I'm gonna start looking at the rubber lines going to and from the canister.  I betcha its one of them that I cannot see easy !!
DanGeek


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