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. Holley part number 554-155.
Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? Re: Holley 9379 on a street Car by 1980RS » Sat 7:03 pm If he's going to drive it on the street just jet it down a couple of jets, should work great. Re: HOLLEY 650 STREET HP trials and tribulations. Please assist by Stingr69 » Fri 11:22 am How are you adjusting the accelerator pump linkage?
holley mangold, Did you set the transition slot exposure? These new Holley carbs have a lot of adjustability. (Maybe too much) I don't know how we ever got down the road with the older, simple models. Holley Street HP 850 - 1.688" throttle bore, 1.563" venturi (how could that flow the same as above?) Holley classic 1000HP - 1.750" throttle bore, 1.561" venturi (haven't we seen this combo with another name?) Plenty more when you get into Demon and Quickfuel dimensions and their 'names'. It's all in a name.
holley mangold, How do Holley Power Valves affect idle AFR? Moderator: Team 31 posts 1 2 3 Next Tuner Guru Posts: 3493 Joined: Sun 9:26 am Location: Now that Holley has discontinued the #4224 660 center squirter carb, I decided to do a little R&D to develop an upgraded alternative. As a result, I'm now able to build a double pumper carb that is the same length as the 660 center squirter, with at least the same airflow capacity. For guys who want to run an inline dual quad setup where the carb center to center distance is 8 1/2" to 9", this ...
