PISTON SPEED:

MAXIMUM BASIC RPM - PISTON SPEED FORMULA

STROKE

(Inch)

STROKE

(Foot)

Max RPM

2-BOLT

Max RPM

4-BOLT

ENGINE CID

 

3.00

3.10

3.25

3.48

3.75

.250

.258

.270

.290

.312

8000

7700

7400

6900

5500

9000

8700

8300

7800

6400

265/283/302

262

307/327

267/305/350

400

Piston Speed = RPM x Stroke x 2

 

 The Maximum Piston speed for a 2-bolt block is about 4000 FPM and 4500 FPM for a 4-bolt block. These ratings are for stock parts and 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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