• 10 Common EFI Mistakes - Hot Rod Magazine

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    As the intake valve opens, higher pressure air in the intake manifold is forced into the cylinder, equaling out the pressure difference. At the same time, the throttle opening is allowing air at atmospheric pressure to force its way into the intake manifold to equalize the low-pressure created by filling the piston displacement.

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  • Intake Manifolds: GM Performance Motor

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  • Intake Manifolds - Holley

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  • Intake Manifold Tech - Airflow Characteristics & Tuning ...

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  • Induction Math for High-Performance Engines

    Jan 24, 2015· The intake flow has inertia, which creates a low-pressure pulse reflected from the intake valve every time it opens. This reverse pulse travels back toward the inlet entry much faster than, and right through, the still onrushing gas mixture until it reaches the inlet entry or atmospheric pressure.

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  • Performance Intake Manifolds

    Dec 07, 2005· A performance intake manifold ranks as the leading bolt-on upgrade in a performance-minded build. Good examples can work wonders, while the …

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  • Butler Performance Inc.

    Description: The Torker II manifold by Edelbrock is a superior high performance single plane intake for Pontiacs. This intake is good for Pontiacs with ported heads that demand high airflow. Especially good on 389, 400, and 428 engines.

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  • How To Fabricate A Custom Intake Manifold | Speed Academy

    Mar 19, 2018· In preparation for this, I wanted to convert the engine to standalone management, using the speed-density strategy (engine speed vs manifold air pressure/temperature = amount of fuel). This meant adding a MAP sensor to the intake. When I started the turbo project, it meant adding more vacuum references.

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  • Intake theory, the very basics. Part II – Infinite-Garage

    This means pressure drops more the further away from the inlet the air goes. The result of this is a suction action towards the furthest cylinder from the inlet. A well designed manifold will have a slight taper to compensate for this pressure drop which helps to keep pressure …

  • Horsepower Secrets: Intake Manifolds • Muscle Car DIY

    May 23, 2016· It is reasonable to expect that an aftermarket performance intake manifold actually can deliver a cost-effective amount of extra power. Unfortunately, this is not always the case. I have tested intake manifolds that gave really mediocre results. In the mid 1980s, I did a big intake manifold test for an article in Hot Rod magazine.

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  • Air Intake Restrictions Explained | High Performance Academy

    Under standard conditions, this pressure is considered to be 101.3 kPa, but it does vary depending on the weather (the high or low pressure systems we see on our weather forecasts), and also with altitude (the higher we go, the less air pressure we have). Now stay with me because you are about to see how this relates to our engines.

  • Olds FAQ -- Intake Manifolds

    The early Olds V-8s used a "raised" intake manifold design with a separate valley cover. There was also a small "bug" shield in front of the intake. The later V-8 intake seals directly to the block. Details. Intake manifolds are cast iron unless otherwise noted. Casting number and ID are located on top front of manifold, usually on the runners.

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    Since the speed of sound in a intake runner at typical air temperature is 1100ft/sec, it is easy to calculate a runner for the 1800 - 2000rpm optimum speed I wanted is 13". This length is the sum of the intake manifold runner plus the length of the intake port in the head between the manifold flange and the intake …

  • Intake Manifold | Performance Boats Forum

    Jun 18, 2009· have a 21 foot Ultra Custom jet boat open bow Chevy 454 Bigblock,just went from stock engine to Comp Hydraulic cam,double roller timing set,valves pushrods,roller rockers etc, I have a 715 Cfm marine carb,Holley mechanical fuel pump 110 Gph,Berkley jet A impellar,Know for my question what intake manifold would you reccomened I have a Edelbroke performer Rpm dual plane ,My mechanic …

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  • What Is an Intake Manifold and What Does It Do? | CJ Pony ...

    Aug 06, 2020· Air travels through the intake and the throttle body into the plenum of the intake manifold. The plenum then equally disperses the air to each of the runners. During the intake stroke, the piston moves down and creates low pressure within the cylinder.