EFI Head and Performance
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
I haven't read that article in quite a while, but there are some things you should know about it. Most of the information is pretty good, but some of it is junk. The one junk part I can remember is the "gasket matching" part. The term gasket matching is a misnomer because you aren't really matching the ports to the gaskets, you are matchig them to each other. If you match them to the gaskets they ports are going to gain a lot of crosssectonal area at the port entry and the port volume will increase unnecessarily with little, if any, gain in flow. The better way to do it is to compare all the ports using the gasket and match the smaller ports to the largest one. There are places on some 300's where you would have to remove almost 1/4" to match the port to the gasket. If you remove 1/4" it is likely you will hit water.
Senior User
Joined: Oct 2002
Posts: 272
Likes: 1
From: Grande Prairie, AB
your right you know its, in my terms called port matching. I plan with my 93 Inline 6 to put a ported head with all the nessesities to free up flow, 19lbs/hr injectors, advance timing, k&n filter and port match the intakes, exhaust and head ports. Do you think by doing this my torque rating will go down and my horsepower will come up, I think if you play with one it hurts the other. Also I got 3:55's from my new parts truck I bought, totally converting it over to 4x4 and i need the Top end mud spinning power, also known as Horsepower.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
The 300 has such a narrow rpm range that helping one will also help the other. 90% of the time, the engines that must make a significant compromise are the ones that have the torque peak and the power peak on opposite sides of about 5000 rpm.
