Performance & Hotrod Business May '14

Issue link:

Contents of this Issue


Page 72 of 115

May 2014 n Performance & Hotrod Business n 71 failing to check for leaks and, second, mount- ing a fuel pressure regulator on a bulkhead or inner fender well instead of positioning it close to the carburetor. As demonstrated by any data acquisition system, the further dis- tance the fuel pressure regulator is mounted from the carburetor, the slower its reaction time. Nicholas, of JET, concurs: Make sure the fuel lines are tight and the fuel fittings and the lines are in good condition before you start the vehicle. If the fittings are chewed up or the fuel lines look old, brittle and tired, replace them; don't just reconnect them to your new carburetor. That is just asking for a fire. Satterfield of dAMBEST offers: Too much fuel pressure can cause serious problems. And too little fuel pressure can also cause engine damage. The float is trying very hard to control the fuel under difficult circum- stances. We are currently using 5 pounds as our base fuel pressure. This a great place to start. Holley gives us two examples of what not to do: 1. Not using a return spring on the throt- tle, which can result in uncontrollable engine speed. 2. Installing a screw in the secondary throt- tle lever to force the secondary open. This can result in an engine backfire and possibly bind the linkage, resulting in uncontrollable engine speed. PROFORM's Platt adds: Do not tamper with the opening of the vacuum linkage be- cause it might stick wide-open. Fun Stories From The Street Below are a few examples of some of the things our manufacturers see all the time, and facepalm in dismay. Don't be the guys below they're talking about. • Zip ties to clamp fuel lines. Unless of course you like fuel leaks. • Driving street vehicles without an air cleaner, but with under-hood insula- tion. Surprise! Hollywood-style flaming car chase. • No fuel filter to protect the needle and seat from debris. Oh, the joys of a flood- ed engine, and possible fire. • Running rubber fuel lines too close to high heat sources such as headers or manifolds. A trifecta! You're risking: va- por lock, percolation and fire. • Looking down the throat of a carb when you rev the engine. If the engine backfires your face would be in the di- rect line of fire, both literally and figu- ratively. • Putting the vehicle in gear with the parking brake on as you try to adjust the carb with nobody behind the wheel. Seriously, it happens often enough to make this list. If you don't know why this could be a problem, put down the wrench and step away from the vehicle. Go ask someone who has a clue; you are unsafe. You'll have your fair share of fun working on carburetors. But do your due diligence to use the correct products, observe the proper procedures and safety, and they're not as hard as you'd think. When in doubt, call the manufacturers. That's what they have support lines for. S. Kellie Colf is president of Colf Creative Resources in Akron, N.Y. She has been in the automotive aftermarket since 2001, serving on several SEMA councils & committees, and has been building and collecting cars since the age of 14. She was awarded Woman of the Year by the SEMA Businesswomen's Network in 2010. She can be reached at JET Performance Products' Nicholas adds: "There have been claims for over 50 years about the carburetor that gets 100 mpg or the one that gets 200 mpg and all the conspiracy theories that go along with why it was never mass-produced. The fact is there is simply no such thing as a carburetor that can get that kind of mileage, never has been, and never will be. These crazy mileage claims from a carburetor break the first law of thermodynamics; if you're really inter- ested, you can look it up." Dangerous Practices Stop and think about it: Carburetors are full of gasoline and gasoline is flammable. Not paying enough attention can cause some very unintended consequences. From Demon's Witmer: Always start the engine and check for leaks before closing the hood. Better to repair a leaking fuel line fitting or a malfunctioning float level than to witness the paint being burned off an im- maculate hood. The two most common offenders are, first, Left: Newer carbure- tors are designed for today's fuel choices. (Courtesy Holley) Below: In the idle con- dition the transfer slots should give the appear- ance of a small square when viewed from underneath the base plate. (Courtesy Demon Carburetion) All Aluminum, Features Galore, 650-1050 CFM models available! "Dress-up Parts are too heavy for the track"…Nonsense! Bowtie Valve Covers and Air Cleaner under 7 lbs…COMBINED! Stop Robbing Your Engine of Horsepower! Cranks Up to 15:1 Compression! Wired & Wireless Models Available! Visit and sign up for a FREE 2014 Catalog! ProformParts Proform Parts PHBMAYp58-91.indd 71 4/2/14 1:59 PM

Articles in this issue

Links on this page

view archives of THE SHOP - Performance & Hotrod Business May '14