A couple weeks ago (month I guess) I bought a book
Chevrolet Inline Six-Cylinder Power Manual
by Leo Santucci
ISBN 1-931128-15-4
Its by California Bill's Automotive Handbooks.
It covers buildup and modification of the sixes quite well including some of the mods that every 6cyl owner should make. One of the mods that I was/am unfamiliar with is called the "lump port" where apparently you take the head into a machine shop and have them remove the divider inbetween the intake ports on the head. Then there is a little "lump" that goes in on the bottom of the newly opened port to better direct the intake flow. I am wondering if any of you have tried this or know anybody who has. It is supposed to really increase flow and efficiency (even more then the f*rd 240/300 separate intake runners) by acting like a large tunnel port.
any thoughts? ideas? real world testing?
I've got a '66 Malibu 4dr back home with a good running 230/PG now, however I also have a 250 and possibly a 292 to play with and I figure I might as well toy with high performance ideas while im at it.
ron
Chevrolet Inline Six-Cylinder Power Manual
by Leo Santucci
ISBN 1-931128-15-4
Its by California Bill's Automotive Handbooks.
It covers buildup and modification of the sixes quite well including some of the mods that every 6cyl owner should make. One of the mods that I was/am unfamiliar with is called the "lump port" where apparently you take the head into a machine shop and have them remove the divider inbetween the intake ports on the head. Then there is a little "lump" that goes in on the bottom of the newly opened port to better direct the intake flow. I am wondering if any of you have tried this or know anybody who has. It is supposed to really increase flow and efficiency (even more then the f*rd 240/300 separate intake runners) by acting like a large tunnel port.
any thoughts? ideas? real world testing?
I've got a '66 Malibu 4dr back home with a good running 230/PG now, however I also have a 250 and possibly a 292 to play with and I figure I might as well toy with high performance ideas while im at it.
ron