Hi everyone, I am ready to order up my fuel system and have a couple of questions. First off my motor is a 383 stroker that is fairly healthy (513hp, 506tq), I am running a mighty demon 750 carb and a holley 110gph mechanical fuel pump. My Chevelle is a 1972 and has a charcoal canister and emission system under the back seat, my original fuel tank has two lines that look like a vent or breather line (one located at each corner of the tank). Here is my question is there any way I can eliminate these systems? I want get rid of the charcoal canister and unhook the system under the back seat, can this be done? I was wondering if I could just use a fuel tank and cap for a 1970 Chevelle. I have been told it can be done but I have to have a way to vent the tank. Just so everyone knows I am ordering a new fuel tank, mounting straps (and insulation),fuel lines and cap and sendin unit. My main issue has been trying to eliminate this canister and still have a safe and proper vented fuel system, Thank you for your input.
70-72 Chevelle owners, fuel system help
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Should be no need to go to a 70 model tank. You can eliminate the ECC (Evaporative Emission Control) under your back seat and use the connections on each corner of your tank as a vents. Not sure how your plumbing is configured (return line or not) but you should consider a sending unit from RobbMc Performance with a 1/2" pick up. Might want to consider a return system to avoid vapor lock and / or pressure creep at the regulator since you are doing the whole system.
http://www.robbmcperformance.com/products/1069_gmsend.html
http://www.jegs.com/i/JEGS-Performance-Products/555/15363/10002/-1?parentProductId=1032957
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I removed my charcoal canister and just tucked the lines that run to it into the driverside fender.
if you park your car in a garage connected to the house you'll be better off leaving the canister stuff and making sure it works right. These old cars will really stink up the house. I have a 70, had a tank leak, only tank laying around was a 72, in it went. Got tired of the wife griping about the gas smell, hooked up a canister system and it went away. I just hooked those 2 vents together with a T, ran a line to the front. Found a simple canister off some GM car, hooked it up.
There is no performance penalty involved in this, doesn't operate at heavy throttle, just in cruise mode.
There is no performance penalty involved in this, doesn't operate at heavy throttle, just in cruise mode.
Hi guy's, thanks for all the responses. I don't think I was real clear in my description, I am trying to keep a factory appearing fuel system. I don't have a fuel pressure regulator, and definitely don't want a sump, my Chevelle did not come with a return line, I just wanted to know if it was possible to run the fuel system from an earlier year Chevelle to eliminate the EEC system for those years that did not have it and still have a normal functioning fuel system. But it looks like I will just have to keep everything the way it is and get new replacement parts for a 72.
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