Topic: Fuel pump concerns .
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Okay I admit, I like big block Mopars. But come on, it's not a Vette!
Okay it is fun. But it's not a Vette!
Now go do your burn out, repeat the mantra, and enjoy! David Lee and all of us will be proud!

Now go do your burn out, repeat the mantra, and enjoy! David Lee and all of us will be proud!

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Frederick, MD - USA
Joined: 9/8/2003
Posts: 3398
Vette(s): 1969 convertible L71 427/435 4-speed black interior
Ken...
I like big block Mopars as well. Besides my Corvettes, I have a '67 Dodge Charger, the original slantback, with a 383 4 speed. Not a Hemi, but it will git!
I like big block Mopars as well. Besides my Corvettes, I have a '67 Dodge Charger, the original slantback, with a 383 4 speed. Not a Hemi, but it will git!
Neat car! Face it, if it has a motor and wheels I like it. My favorite mopar is the 68-72 Dart, but there are so many that are great cars. My absolute favorite is the C3 Vettes.
Ok, ok, I get the Mopar vs. Fiberglass thing ! But, as I said, I have both, so
........ Now, it appears my best bet is to just send my tank out, and get the proper pump installed inside. That way, no muss, no fuss over fuel lines, or pressure regulators. Seems as though this project is turning out to be a bigger in the ass than an ex girlfriend !





That was supposed to read " Bigger PAIN in the ass "....
Damn my typing....... 


I would leave the tank alone and install an inline electric fuel pump for fuel injection. You may also be able to use the stock supply & return lines. You might ask advise from the Corvette Clinic. They are located in Florida and write tech articles for Corvette Fever Magazine. Last summer I saw an '80 Vette with a '96 LT-1 motor & trans installed. I think he used the existing fuel lines and installed an inline fuel pump. He used the computer and wiring harness from the '96 Vette. He now has 21/22 mpg and 300 hp. SWWEEEET!


sstanford
'76 L48

Kingston, PA - USA
Joined: 11/26/2003
Posts: 636
Vette(s): 1977 L-82 originally white/buckskin interior.
Currently undergoing a frame-off resto. and modifications.YEEHAW!!!
Bill and Ken,
Yes, I like Mopars also, they were the heaviest and fastest cars that Detroit put out in that time, c'mon, when someons uttered "Max Wedge" people grumbled "damn" to themselves with envy.
And I grew up when Van Halen were gods, so, in my opinion, Diamond Dave still rules. Plus, it's a pretty cool saying.
"A bigger pain in the ass than an ex-girlfriend".....
Now that's funny.
Alan
|UPDATED|4/22/2004 8:12:56 PM (AZT)|/UPDATED|
Yes, I like Mopars also, they were the heaviest and fastest cars that Detroit put out in that time, c'mon, when someons uttered "Max Wedge" people grumbled "damn" to themselves with envy.
And I grew up when Van Halen were gods, so, in my opinion, Diamond Dave still rules. Plus, it's a pretty cool saying.
"A bigger pain in the ass than an ex-girlfriend".....
Now that's funny.
Alan

|UPDATED|4/22/2004 8:12:56 PM (AZT)|/UPDATED|
I think I can clear up the fuel line confusion a bit . I have a picture of the engine , and, it appears that one line goes from the driver's side injector rail ,over the passanger side head , and down . Another line also goes to the same rail, but, it goes to a , sort of, valve ( for lack of a better word ). Also, connected to said valve, is another line that follows the same path as the first line I mentioned . My guess is there is NO mechanical pump , and there is an electric pump in the tank . Too bad I just couldn't use the damn tank from the '94 !
So, any thoughts on this developement ? Besides giving up I mean !!

So, any thoughts on this developement ? Besides giving up I mean !!


The LT-1 has and electric fuel pump in the tank, sending fuel to the fuel rail and injectors. Pressure is controlled by a pressure regulator attached to the fuel rail. The regulator has a vacuum hose with manifold vacuum to adjust pressure for different condition. And excess fuel/pressure is leaked off to a return line (no pressure) to dump back into the tank. There is a third line to the tank that goes to the charcoal cannister to vent the tank.
When engine vacuum drops, the fuel pressure goes up. Some think this is for acelleration enrichment. It's not. The computer handles that. When the throttle is opened vacuum drops, which means actual intake pressure goes up. The fuel pressure goes up the same amount to keep the difference in pressure between the intake and the fuel rail the same. Other wise you would actually get less fuel with low vacuum and the same amount of injector pulse.
And that ex girlfriend thing is funny.
But here I'm unusual again. I can only imagine. I don't have an ex girlfriend. Never did. My wife and I met in 10th grade, started dating in 11th grade, married 2 years out of high school, and are still married. Guess I'm stuck with her now.
When engine vacuum drops, the fuel pressure goes up. Some think this is for acelleration enrichment. It's not. The computer handles that. When the throttle is opened vacuum drops, which means actual intake pressure goes up. The fuel pressure goes up the same amount to keep the difference in pressure between the intake and the fuel rail the same. Other wise you would actually get less fuel with low vacuum and the same amount of injector pulse.
And that ex girlfriend thing is funny.
But here I'm unusual again. I can only imagine. I don't have an ex girlfriend. Never did. My wife and I met in 10th grade, started dating in 11th grade, married 2 years out of high school, and are still married. Guess I'm stuck with her now.

in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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