I'm quite impressed with it.
I like so much that I'm also going to buy the "port" and "head" programs, too...just don't tell my wife...lol!
Why am I telling you this?
Because I want to share this software with the members!
This software also has a program that lets you figure out if your exhaust port is too big, or too small, and it also gives a recommendation for carb size. Neat!
The pic below shows a read out for a stock Hirth 634.
If you are a member of the ACCA, and would like me to run your specs through and design a pipe, e-mail me (634mod@centurytel.net) the following info:
Intake type (piston port, rotary valve, piston/reed, or case/reed)
Bore & Stroke (in millimeters or inches)
Connecting Rod length (center/center, in mm or inch) (if you don't know the length, the default is "stroke x 2")
RPM at peak HP (or rpm where you want the pipe tuned to)
Exhaust and Transfer timing (in degrees after top dead center) (or measure from the top of the cylinder to the top of the exhaust/transfer port) (can be in mm or inch)
Exhaust Port length (from the piston face to the end of the manifold) (see diagram below)
Pipe Inside Diameter (at the exhaust manifold) (see diagram below)
Also, if you want me to check the size of the exhaust port, tell me the diameter of the port where the flange bolts up (not the I.D. of the manifold, but the diameter of the port itself)
If you have any other questions, just send me an e-mail.
This program can figure out both "HP" and "Torque" pipes, pipes with 1, 2, and 3 angle head cones, and 1 or 2 angle tail cones. It pretty much does it all!
Later ....... Paul W.
