Re: New toy - 1953 Bel-Air sedan
I have watched all those videos. I know you don't know my background, so I thank you for all the video and other suggestions, but I have been working on cars since I was a kid, tuned many Holleys and Demon carbs, but Edelbrocks in my time with them, when you bolt them on typically they work out of the box and need only the idle air adjusted. This one has some issues... The carb is factory stock with the exception that I swapped the electric choke out for a manual one, did a quick clean and new gaskets, and swapped floats from another carb that had less abuse.
The only difference between the manual choke and electric choke models from the factory is the step up springs.
So here is what I did last night...
I pulled the top off the carb, and checked the floats. They were set wayyy to high, and with too much drop. So instead of being a 7/16" to 1/2" height when they close, they were only about 1/4" so they closed way too late. Also, they were set to droop all the way but, basically they could droop all the way to the bottom of the bowl. So that was an easy remedy, and definitely was a lot of the issue.
While I was in the carb, I did swap out the step up springs with the orange ones that should be in a manual choke model. After I got the carb all buttoned back up, I swapped out my MSD HEI module for a factory GM one (actually an accell module but in factory form) and put in the factory weights and center piece for the mechanical advance. I put in a medium spring so I could get a bit faster advance with it all in around 3000 rpm (or therabout, I don't have a working tach at the moment). Put all that back in, and started the car. Right off it ran much better, definitely had significantly less raw gas smell coming out the exhaust, but I quickly noticed I had a massive fuel spray coming out the fuel inlet (Spectre hard line with plastic washers for seals). The plastic washers were deformed from me putting it on and off a few times, so I yanked that off, and used a standard brass fuel inlet on the carb, and moved my fuel guage to the front of the regulator instead (it's a little harder to read here, but still OK). I started the car back up, verified it had no more fuel leaks, and dropped the fuel pressure to 5psi from the 6.5 that I had it runing at. As I lowered the fuel pressure, the car smoothed out dramatically and the rpm rose just as if I was leaning out the idle screws on the carb. I got the fuel pressure stabilized, thats when I discovered the 3/8" fuel line I bought (rubber hose) was either collapsing under vacuum (on the PCV hose) or swelling under heat and pressure on the fuel side and my 4 corner cooling lines on the intake. So when I had my fuel pressure guage by the carb, it is likely the fuel pressure was much higher than 6.5 psi, since the fuel line was swelling.
So I grabbed the roll of fuel line and read it, and it says right on it "3/8" fuel line, not for use on underhood applications" - tell me where you use fuel line on a vehicle that is NOT underhood? I had never even seen fuel line that said it can't be used underhood... I looked up the specs and the max temp of the fuel hose I have is only 150 degrees.
thats rediculous. It's useless in a car. So pay attention to what you buy when buying fuel hose from a hardware store!!!
Anyway, so where I am not, I have my ignition timing doing pretty well, I think I have it at about 15 degrees initial, and adding about 12 degrees full in - I may like a little more initial timing, I usually like about 32-35 degrees all in, seems to get the best power that way with a mild cam. I plan to order all new fuel hose, and hopefully finish welding my trunk pan so I can install my fuel cell in the trunk, and actually get my fuel gauge and the steel hard fuel lines in the car sooner than later.
Brakes after that, then steering. I need a few parts that cost a few hundred dollars and I don't have a ton of free cash right now. Vacation is coming up, and I need a few bucks for that. I'm getting antsy now cause I am getting pretty close to being able to at least drive it around my yard, and I don;t have enough time it seems as I try to balance time with my kids and working on projects, and I don't have a ton of money right now. Trying to be thrifty, sell stuff to buy stuff, but no one seems to be buying anything right now.
If the carb still runs funny after getting all the new lines in, I may still go to a 570 cfm Holley or Demon street carb, or a 600 cfm holley. I think they are way easier to tune, and I actually prefer a double pumper to a standard model, but I will get what I can.
I have a 600 cfm edelbrock on the car now, all rebuilt, and a 750 that is pretty immaculate inside and if I get a holley, I will probably sell both the edelbrocks. Bummer... I really like them, but theyre not the best for tuning or performance IMO.
Hugh-SS/16 fan #0001
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