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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   Strut spring orientation and strut mount tension nut 2017 Nissan rogue awd 2.5 L Put in Monro...   Transmission stuck in part, I have tried everything So I'm working on my elderly fathers 201...   2017 dodge journey LED headlights on/off randomly Year of vehicle 2017 Make of vehicle dod...   Kia Soul starter replacement issues! Okay so my car is a 2010 Kia soul 2.0 en...   Please Help - Knock sound & engine fail Hi all, Hoping to get some insight and ...   multiple warning lights 2013 GMC Terrain 130,000 miles 4 cylinde...   03 alero no low speed blower Good day everyone, I have a 2003 Olds a...   04 Chevy 2500hd tail light issues Help!!! I have changed my combo switch...   1999 Grand Caravan Sport not starting. Hi. I'm new here. I hope someone can hel... Brake Seals Bulging 2021 Toyota Corolla LE 1.8l 65,000 mile...

engine noise Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine Troubleshooting astroowener New User Mar 27, 2011, 12:40 PM Post #1 of 4 (1568 views) engine noise Sign In hi i have a 1979 ford f150 4x4 with a 300 six i have installed a offenhouser with a edelbrock 500 cfm carb. when i start to wind it up more rpm it makes a high pitch noise like a bad alt. bearing or a loose fanbelt . i have taken all of the belts off and it still sounds the same forgot to add i 've also added headders any ideals? thanks Tom Greenleaf Ultimate Carjunky / Moderator Mar 28, 2011, 3:53 PM Post #2 of 4 (1554 views) Re: engine noise Sign In Was it fine before this? A maybe is you are hearing noise from carb or vapor flow thru headers? T astroowener New User Mar 28, 2011, 5:53 PM Post #3 of 4 (1545 views) Re: engine noise Sign In well it was fine before i installed the new intake and carb but all it had was a 1 barrel thanks Tom Greenleaf Ultimate Carjunky / Moderator Mar 28, 2011, 7:10 PM Post #4 of 4 (1541 views) Re: engine noise Sign In It's not so much how many barrels a carb has it has to match the intake and what the engine can take in. You could put a 4V on it and it would do any more than what it came with. I pick a strange analogy. Put two faucets on a sink and if the drain can't handle more water you haven accomplished anything. It all has to line up and match. I think now you are hearing noise from it or perhaps the headers just don't have a good flow thru them? Hard to say but perhaps you can pin point the noise with a listening rod or automotive stethoscope. The chief reason that I know of for multiple venturi carbs is to smooth them out under various loads and demands. You get nothing unless the rest can accommodate by adding more CFM to an intake or intake valves not designed to take more. More power takes more than just a fancy named carb. Correcting a problem that a vehicle had new by design is another thing and the late 70s to early 80s were stuck with EPA regs plus CAFE regs had started to kick in and there were some real rats as engineering hadn't caught up to the new regulations - that's different. VV the variable venturi carb was a nightmare around then - funky looking things and you'll never see one because they ran so poorly they were redesigned with a more traditional type available aftermarket or perhaps Ford recalled them - can't remember now. Didn't use them on the sixes, T   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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