Gen 2 Engine Development begins

[Bertrand]

Hi!
Soon on sale?

 

[mngforce]

We now have the 2nd lower case Bored/Sleeved. We will be building this up through the month of November. Expect Pics soon.

 

[mngforce]

View attachment IMG_2480.jpeg Testing on the flow bench for best valve shape before ordering custom oversized valves

 

[mngforce]

Flow testing different valve shapes before ordering custom oversized valves

 

[Bertrand]

Cool ! Thank you for your feedback.

 

[mngforce]

Studying the modified cams to select valve springs and design valves.

 

[Bertrand]

Wow! great! , but I don't understand everything
Duration, lifting, that I understand. But the other curves, I don't understand!
Can someone explain to me?

 

[mngforce]

Wow! great! , but I don't understand everything
Duration, lifting, that I understand. But the other curves, I don't understand!
Can someone explain to me?

You have a lift curve. Shows lift and duration. Self explanatory (Blue)
Then you have a Velocity Curve which shows how fast the cam opens at a given point. (Orange) Used to determine the cam bucket size
Then an Acceleration Curve, which says just how fast the velocity is increasing or decreasing. (Green) Used to calculate the forces against the valve springs. Helps choose a valve spring.
Lastly you have Jerk. That's the rate of change of acceleration. (Red) Determines how aggressive, or gentile the cam is against the valve train. Helps determine if you will have spring surge, or not.