Often asked: Afr Heads Stands For What On Motors?

What does AFR heads stand for?

Air Flow Research cylinder heads became a key consultant to General Motors, designing cast iron and aluminum heads for the still-popular phase 3, 4, 5, and 6 Bowtie Small Block Chevy.

What is AFR manufacturing?

Annualized failure rate (AFR) gives the estimated probability that a device or component will fail during a full year of use. It is a relation between the mean time between failure (MTBF) and the hours that a number of devices are run per year.

Where are AFR heads made?

Utilizing modern manufacturing techniques and the latest in machinery, such as a Browne & Sharpe Coordinate Measuring Machine, fifteen Haas’ 5-AXIS CNC machines, three Mazaks, two Newen Epoch machines and a Mori Seiki 32 pallet system, AFR stays true to this commitment by manufacturing each piece in our Valencia,

What do cylinder head flow numbers mean?

The flow numbers provide solid information on the power potential offered by the cylinder heads. Why do we use the phrase power potential? The reason is simple. As measured on the flow bench, the airflow numbers indicate only the flow potential of the port.

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Are AFR heads worth the money?

Yes, AFR’s are worth it. They are supposedly the best “out of the box” bolt on head, ready to go.

Are AFR heads Made in USA?

While many companies in the industry have looked to off-shore production to increase profitability, AFR has managed to be the industry leader in performance and quality while keeping their production right here in the USA.

What is the correct air/fuel ratio?

The stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air. For gasoline fuel, the stoichiometric air–fuel mixture is about 14.7:1 i.e. for every one gram of fuel, 14.7 grams of air are required.

What is an AFR?

The applicable federal rate (AFR) is the minimum interest rate that the Internal Revenue Service (IRS) allows for private loans. Each month the IRS publishes a set of interest rates that the agency considers the minimum market rate for loans. Any interest rate that is less than the AFR would have tax implications.

How do you calculate AFR from MTBF?

The inverse of the MTBF is the failure rate. The annual failure rate (AFR) is defined as the average number of failures per year: AFR = 1 MTBFyears = 8760 MTBFhours.

Are AFR enforcer heads cast in China?

It is a new clone copy of the Dart Pro-1 Platinum 200cc, and is a surprisingly well made casting. AFR just puts their 8mm guide and valve deal in it. It is a chinese casting, and AFR admits to it.

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Who makes Patriotheads?

Promaxx Performance still produce Patriots aftermarket Performance Cylinder Heads to suit Small Block Chevrolet (SBC), Big Block Chevrolet (BBC), GM Vortec, Small Block Ford (SBF) and 6.0L Ford.

What is an as cast head?

Sold individually, these heads are made from a permanent mold casting that come with As-Cast surfaces on the intake runners, exhaust runners and combustion chambers. These heads are a perfect choice for anyone looking to upgrade to aluminum heads with modern port designs for their muscle car or street rod.

How many CFM do LS heads flow?

In. Ex. The 241 heads were used on 5.7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. In terms of peak flow, the 241 heads offered 242 cfm at 0.700-inch lift from the 199cc intake ports, and 204 cfm from the 71cc exhaust ports.

What is head flow?

Head Flow is the efficiency at which the air/fuel mixture flow through the ports of the heads. Back in the 60’s and even as recently as the 80’s, car manufacturers where making very inefficient heads.

How do you calculate CFM for a cylinder head?

C.F.M. calculator

  1. C.F.M. = Engine Size (C.I.D.)
  2. times maximum R.P.M.
  3. divided by 3456.

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