PISTON SPEED:

MAXIMUM BASIC RPM - PISTON SPEED FORMULA

STROKE

Max RPM

ENGINE CID

INCH

FOOT

2-BOLT

4-BOLT

3.00

.250

8000

9000

265/283/302

3.10

.258

7700

8700

262

3.25

.270

7400

8300

307/327

3.48

.290

6900

7800

267/305/350

3.75

.312

5500

6400

400

Piston Speed = RPM x Stroke x 2

These ratings are for stock parts

 The Maximum Piston speed for a 2-bolt block is about 4000 FPM and 4500 FPM for a 4-bolt block.

 I have stayed inside these ratings and have NEVER had a problem.

EXAMPLE:

RPM =

Stroke =

Formula =

Piston Speed =

350-CID @ 4000 RPM

4000

 0.29 Ft.

4000 x 0.29 x 2

 2320 FPM.

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