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How Do You Determine Bore And Stroke?

The bore is determined by the diameter of a cylinder and the stroke is determined by the distance a piston travels up and down inside that cylinder.

  1. Use your measuring tape to measure the inside diameter of the cylinder.
  2. Ensure the piston is at the bottom of the cylinder.

What’s the bore and stroke on a 302?

Other Differences

Engine Size Bore Stroke
260 c.i.d. / 4.3L 3.800 in. 2.870 in.
289 c.i.d. / 4.7L 4.000 in. 2.870 in.
302 c.i.d. / 5.0L 3.000 in.
351 c.i.d. / 5.8L 3.500 in.

What can a 351W be stroked to?

Now you can, because Performance Automotive Warehouse (PAW) makes it possible by taking Ford’s venerable 351ci Windsor small-block and stroking it to 427 ci. Stroking an engine to achieve greater displacement is nothing new. It’s a common sense approach to getting an engine to produce more power.

What is a good bore to stroke ratio?

between 1.1 and 1.2 to one


Typical bore-to-stroke ratios are between 1.1 and 1.2 to one in high-performance production engines, and may be greater than two to one in high-end racing applications such as Indycar and Formula One [2]. The second two considerations gain in importance when fuel efficiency is paramount.

Which is better short stroke or Longstroke?

‘It’s because of the higher peak piston acceleration. A long bore engine, as the name suggests, has a longer cylinder. These engines reach their peak torque at a lower rpm when compared to a short-stroke engine. These are more efficient engines and are moreover used in commercially selling cars.

What is the best bore to stroke ratio?

between 0.8 to 1.1


Many production passenger car engines have a stroke/bore ratio between 0.8 to 1.1. Truck stroke/bore ratios are typically higher (1.0 to 1.4) to improve efficiency and low speed torque. The higher the stroke/bore ratio, the less RPM the engine can safely handle, but the more low end torque it will produce.

Can you stroke a 302?

Ford Based 302 Small Block Mild stroker setup, using a 3.250″ stroke to achieve a displacement of 331 cubic inches. Balanced top and bottom end power makes it ideal for many uses. This configuration is identical to a 347 (3.400″ stroke), except it requires the use of an aftermarket “Big Bore” block.

How far can you bore a 351W?

U can safely bore it to . 060″ os without any trouble.

How much can you stroke 351?

It uses a lengthy 4.170″ stroke to yield 427 cubic inches. As expected, because of this stroke, this motor will be very bottom-end heavy and is best suited for applications such as street cars, tow rigs, and trucks where RPMs will be somewhat limited. Compression ratios range from low to high.

What is the stroke size of a 351 Windsor engine?

The cylinder bore size for the 351 is 4.00 inches. The stroke, which is the length of travel for the piston in its cylinder bore, is 3.50 inches.

What’s the cylinder size of a Ford 351?

This firing order is different from the rest of Ford Motor Co.’s small-block engines. The cylinder bore size for the 351 is 4.00 inches. The stroke, which is the length of travel for the piston in its cylinder bore, is 3.50 inches.

What is the firing order for a Ford 351 Windsor?

The firing order for the 351 Windsor is 1-3-7-2-6-5-4-8 with the No. 1 cylinder located on the right side of the engine at the front. This firing order is different from the rest of Ford Motor Co.’s small-block engines.

What’s the bore and stroke on a 302 Windsor?

With a 4.060″ bore and stock 3″ stroke, your 302 Windsor’s new displacement, would roughly be 310 cubic inches. I would place it in the “high risk” category due to the thin cylinder walls after the .060” overbore. If it’s not turning serious rpm it’s fine.


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