Nettet5. mar. 2024 · Holley Ultra XP Issues. Discussion in 'Technical' started by 1974Comet, Feb 20, 2024. Page 1 of 2 1 2 Next > 1974Comet Enthusiast. Joined: Aug 7, 2012 Messages: 129 Likes Received: 0 Trophy Points: 33 Location: Kansas City, MO Vehicle: 1974 Mercury Comet. Nettet20. des. 2024 · When tuning my 434, the 850 Ultra pulled better numbers on the dyno, The Q-950 had a tighter a/f ratio and ran a little richer at peak. That safety cushion may be worth it. Both carbs pulled 0.2-0.3 inHg of manifold vacuum throughout the runs. I'll test and tune both at the track next season.
Tuning the Holley 950 Ultra XP - racingfuelsystems
NettetHolley Ultra XP Replacement Main Body 850 CFM Shiny Ultra XP Replacement Main Body 850 CFM Shiny Part # 134-314 Be the first to write a review In Stock Free Shipping - Lower 48 US States Your Price … Nettet4. mai 2024 · One is a Holley 850 ultra xp. Tried to run it at one point and could never get past it needing to be so rich at idle and cruise to not have super lean transition spikes … last ottoman ruler
Holley Redesigned its Legendary 4150 Carburetor for
NettetQ-Series Carburetor 850CFM Drag Race E85. $1,086.95. Part# Q-850-E85. Add To Cart. Overview. Xtreme Performance - Holley Ultra XP™ carburetors! Ultra XP carbs are up … Nettet9. apr. 2006 · Very annoying in traffic. Once you get into the accel pump or more throttle to get into the main circuit, its a downright monster and doesnt miss a beat This problem has been following the motor through 3 builds, the carb is 3 yrs old or so and was purchased new, all Holley parts inside, etc. NettetHolley's Ultra XP carburetors are up to 38 percent lighter than their traditional carbs, offer 20 percent greater fuel capacity, and include a host of other features. One of the main … last pyspark