Rick Engman Is Building My Motor!
02-07-2005, 02:14 PM
#62
Senior Member
Join Date: Dec 2002
Location: Bayou-self Louisiana
Posts: 947
Hijacking question....Would you ask him if Mazda will compete with the 787B again like the American Lemans DP division or any future stuff.
I remember he had a coup[le 4 rotors laying in the shop at one time.
I remember he had a coup[le 4 rotors laying in the shop at one time.
02-08-2005, 02:16 PM
#63
Member
Join Date: Nov 2002
Posts: 92
Originally Posted by 93BlackFD' date='Jan 21 2005, 09:13 PM
93black, do you know why he prefers to round out the exhaust port opening vs. a straighter bottom like most porters prefer?
02-09-2005, 11:42 PM
#65
Member
Join Date: Aug 2004
Location: Houston
Posts: 76
Originally Posted by fdracer' date='Feb 8 2005, 03:16 PM
93black, do you know why he prefers to round out the exhaust port opening vs. a straighter bottom like most porters prefer?
02-10-2005, 07:21 AM
#66
Senior Member
Thread Starter
Join Date: Feb 2003
Posts: 240
Originally Posted by rotarygod' date='Feb 9 2005, 09:41 PM
Because Mr. Engman has alot of experience and actually knows how air flows through an exhaust port. If the bottom edge of the exhaust port is flat, airflow is really decreased. If it is slightly rounded like the picture, flow increases. You do not want a wide port opening line. The exact opposite is true with the top edge. A rounded top edge hurts flow whereas a flatter top edge helps it. On a flowbench you can really see this.
yeah and you should see his flow bench
02-13-2005, 10:46 PM
#67
Senior Member
Join Date: Oct 2004
Posts: 110
Originally Posted by rotarygod' date='Feb 9 2005, 10:41 PM
Because Mr. Engman has alot of experience and actually knows how air flows through an exhaust port. If the bottom edge of the exhaust port is flat, airflow is really decreased. If it is slightly rounded like the picture, flow increases. You do not want a wide port opening line. The exact opposite is true with the top edge. A rounded top edge hurts flow whereas a flatter top edge helps it. On a flowbench you can really see this.
Great stuff,
so on a pp intake would that mean bottom end flat and top end rounded, just the reverse???
CW