Holley Carburetor Specifications, List Numbers, Jetting ~ Current News

Jet # Actual Size Jet # Actual Size 80 0.090 96 0.119 81 0.092 97 0.121 82 0.093 98 0.122 83 0.096 99 0.125 84 0.097 100 0.127 85 0.098 101 0.129 86 0.099 102 0.133Most performance-oriented Holley carbs have jets on both the primary and secondary sides. The jets are accessed by removing the fuel bowls on each end of the carburetor. But there is an important exception: 4160 carburetors (such as most O-3310's and O-1850's) do not have replaceable jets on the secondary side.1. Out of the box jetting should be close for most applications. 2. Carburetors are calibrated at 70° at sea level. Decrease the jet size, one number for every 2000 ft. increase in altitude. 3. Holley jets are broached, flowed, and stamped according to flow rate. NEVER drill jets, as this seriously alters flow characteristics.Holley and many aftermarket Holley specialists offer metering blocks specifically for ethanol- and methanol-based fuels. If you have the budget this is the painless way to go. Flowing enough alcohol fuel into the induction system means not only having jets with 60 percent more area (ethanol) or 260 percent more area (methanol), but also havingJet Chart or Calculator; If this is your first visit, Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer.

The Basics of Jetting a Holley Carburetor - RacingJunk News

Holley Alcohol Jets are specially designed to work only with Holley 4150 HP carbs O-80542, O-80535, O-80498. The unique metering blocks used with these carbs are designed to accept the physically larger size of this main jet. Two lengths are available: a ''standard'' length jet and an ''extended'' length jet. The standard length jet can be used with a stock, unmodified float; the extended jetNitrous Jetting and Horsepower Charts are a quick and easy way to determine what size jets you need for your application. Check out our page The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Please click Accept Cookies to continue to use the site.Holley explains how the main jets on a four-barrel carburetor operate. They also give instructions on changing the jets for increased performance. The videoFollowing the HP, Holley produced the HP Ultra version, which upgraded to black-anodized billet metering blocks with screw-in idle feed and emulsion jets and a billet baseplate.

FAQ Rejetting Holley Carbs - Jets R Us

Holley Carburetor Numerical Listings Carb. Primary & Primary Secondary Primary Secondary Primary Carburetor Model CFM Renew Trick Secondary Main Main Jet Metering Metering Primary Discharge Part No. No. Kit Kit Needle Jet or Plate Block Block Power Valve Nozzle & Seat Size 0-1848-1 4160 465 37-119 37-933 6-506 122-57 N/S N/S 34R9716-3 125-85 .025Free Shipping Available. Buy on eBay. Money Back Guarantee!The undisputed leader in fuel systems for over 100 years. Carburetors, Standalone ECUs, EFI Conversions,new holley main jet set,72 jets,2 each of sizes 64-99,compatible with 2010,2300,4010,4150,4160,4500 carburetorsJet Tools Main Body Thread Repair Metering Block Related Pin Guage Sets Pump Nozzle Repair Kits Verticle Mill Booster Contacts Holley to BLP R-Jet Conversion Table. Home Help Center Holley to BLP R-Jet Conversion Table. Contact Informaton . Order: 1-800-624-1358. Tech: 407-422-0394 . FAX: 407-422-2741.

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