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Apex Seal Travel Calculation Sheet (Your input)

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Old 04-25-07, 05:47 PM
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Apex Seal Travel Calculation Sheet (Your input)

Note, I did this on my way home from Atkins Rotary, Calculations I hope are right, what i need is input on more accurate numbers, like suggestions for different average rate of speed or revolutions per minute... that kind of thing, I would like it to be more accurate.

This is just for fun so don’t rip my head off if you don’t agree with something, just make suggestions!

P.S. I was about 75% sure that a rotor makes two revolutions for one rotation of the eccentric shaft, please correct me if I’m wrong.






General Information
(Units)(Unit Discription)equation(Units)(Unit Conversion Info)

120,000.00 Miles Traveled (life span)
45.00 MPH Average Speed
3,500.00 Revolutions Per Minute X 60.00 Minute to Hours
210,000.00 Revolutions Per Hour / 45.00
4,666.67 Revolutions Per Mile X 120,000.00 Total Miles
560,000,000.00 Total Revolutions


For a Rotary 13B-REW

560,000,000.00 Total Revolutions X 2.00 Rotations of a rotor per RPM *Unconfirmed
1,120,000,000.00 Total Revolutions Of the Rotor X 29.11 Estimation of Apex Seal Travel in one revolution of the rotor *Unconfirmed
32,603,200,000.00 Inches Traveled (Apex Seal) / 12.00 Inches To Feet
2,716,933,333.33 Feet Traveled (Apex Seal) / 5,280.00 Feet To Miles
514,570.71 Miles Traveled (Apex Seal)

General Information

514,570.71 Miles Traveled (Apex Seal) / 120,000.00 Miles Traveled (life span)
4.29 Ratio Of Travel Rate Between Car and Apex Seal

For a Piston SR20DET

86.50 Stroke (mm) / 25.40 mm to Inches conversion
3.41 Stroke (Inches) X 2.00 Strokes Per Revolution
6.81 Inches Per Revolution X 560,000,000.00 Total Revolutions
3,814,173,228.35 Inches Traveled (Piston Ring) / 12.00 Inches To Feet
317,847,769.03 Feet Traveled (Piston Ring) / 5,280.00 Feet To Miles
60,198.44 Miles Traveled (Piston Ring)

General Information

60,198.44 Miles Traveled (Piston Ring) / 120,000.00 Miles Traveled (life span)
0.50 Ratio Of Travel Rate Between Car and Pison Ring


Also I found that the apex seal travels at an average of 200 MPH (during operation using ^ variables
Old 04-25-07, 06:42 PM
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Well, to start off, the rotor makes 1/3 of a rotation for one rotation of the eccentirc shaft...

3000 rpm eccentric= 1000 rpm rotor
Old 04-25-07, 08:54 PM
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correct...1 rotation of rotor for 3 of the eccentric
Old 04-25-07, 09:27 PM
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Damn, lol

I should have looked that up first.

General Information

120,000.00 Miles Traveled (life span)
45.00 MPH Average Speed
3,500.00 Revolutions Per Minute X 60.00 Minute to Hours
210,000.00 Revolutions Per Hour / 45.00
4,666.67 Revolutions Per Mile X 120,000.00 Total Miles
560,000,000.00 Total Revolutions


For a Rotary 13B-REW

560,000,000.00 Total Revolutions X 0.33 Rotations of a rotor per RPM
186,666,666.67 Total Revolutions Of the Rotor X 29.11 Estimation of Apex Seal Travel in one revolution of the rotor *Unconfermed
5,433,866,666.67 Inches Traveled (Apex Seal) / 12.00 Inches To Feet
452,822,222.22 Feet Traveled (Apex Seal) / 5,280.00 Feet To Miles
85,761.78 Miles Traveled (Apex Seal)

General Information

85,761.78 Miles Traveled (Apex Seal) / 120,000.00 Miles Traveled (life span)
0.71 Ratio Of Travel Rate Between Car and Apex Seal

For a Piston SR20DET

86.50 Stroke (mm) / 25.40 mm to Inches conversion
3.41 Stroke (Inches) X 2.00 Strokes Per Revolution
6.81 Inches Per Revolution X 560,000,000.00 Total Revolutions
3,814,173,228.35 Inches Traveled (Piston Ring) / 12.00 Inches To Feet
317,847,769.03 Feet Traveled (Piston Ring) / 5,280.00 Feet To Miles
60,198.44 Miles Traveled (Piston Ring)

General Information

60,198.44 Miles Traveled (Piston Ring) / 120,000.00 Miles Traveled (life span)
0.50 Ratio Of Travel Rate Between Car and Pison Ring
Old 05-10-07, 03:12 PM
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Very interesting stuff never really thought about how many times a rotor can spin before an apex seal blows or w.e. And yes its 1 to 3 ratio, lol soon as i started reading and saw the two revolution for one revolution of the eccentric shaft I knew someone would correct this quickly.
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