02V8Sport
Dedicated LVC Member
pistons open up?
Port and Polished my intake and exhuast
- Thread starter 00_slow_5spd_ls
- Start date
pistons open up?
AndrewCoja
Well-Known LVC Member
I guess it runs on two cylinders and then at some point it starts using the other two cylinders as well.
02V8Sport
Dedicated LVC Member
The VTEC has nothing to do with pistons.
VTEC (which stands for Variable Valve Timing and Lift Electronic Control) is an electronic and mechanical system in some Honda engines that allows the engine to effectively have multiple camshafts. As the engine moves into different rpm ranges, the engine's computer can activate alternate lobes on the camshaft and change the cam's timing. In this way, the engine gets the best features of low-speed and high-speed camshafts in the same engine.
VTEC (which stands for Variable Valve Timing and Lift Electronic Control) is an electronic and mechanical system in some Honda engines that allows the engine to effectively have multiple camshafts. As the engine moves into different rpm ranges, the engine's computer can activate alternate lobes on the camshaft and change the cam's timing. In this way, the engine gets the best features of low-speed and high-speed camshafts in the same engine.
AndrewCoja
Well-Known LVC Member
So it always fires all four cylinders.
decibels5
Dedicated LVC Member
:bow: :wrench :bowrofl: :bowrofl: :bowrofl: :bowrofl: 
I think the process he was going for was "Extrude Hone"
In simple terms, the Extrude Hone process basically pumps a harsh and abrasive media compound through the port of a head or intake and the sand-like media smoothes out the port to make it better. The end result is a smoother, better flowing and cleaner finish. When discussing the advantages of the Extrude Hone process two things come to mind. For starters, the process is not expensive and ports that grinding materials can't reach are no problem for the pressurized media. The stuff can go anywhere air can go. There are no limits to its capabilities and that is why the process works so well.
Another advantage is that certain intake manifolds need to be cut in half due to their awkward shape and size in order for the porter to be able to access the inside of the unit. If the intake is not cut in half portions of it will not be able to be reached by a conventional porting tool. This is no match for the Extrude Hone process as the media can be pressed into virtually any shape. This also saves the intake owner the hassle of having to weld the intake back together after the porting job has been completed.
"The central element of the Extrude Hone process is the media, a polymer carrier mixed with abrasives. The viscosity of the carrier and the abrasive grain size, type and concentration can be varied to achieve specific finishing results," stated Miller. "When forced into a restrictive passage, the viscosity of the media temporarily rises, holding the abrasive particles rigidly in place. The media abrades the passage through which it flows only when in this restricted state. The viscosity returns to normal when the thickened portion of media exits the restrictive passage, producing no abrasion on areas such as threads or seal surfaces.
The tooling to perform such a job is equally impressive and very important towards the accuracy of the job. "The tooling holds the work piece in position and directs the flow of the media to the required areas," said Miller. "Many applications require only simple tooling: dies typically need no special tooling; the die passage itself provides the restriction for the flow path. For external edges or surfaces, tooling is used to restrict the flow between the outside of the part and the inside of the fixture. The tooling may also serve to restrict flow through areas that are to remain unaffected.
The Extrude Hone process is operated by a machine that is available in a variety of sizes and configurations. "The typical machine contains two vertically opposed media cylinders which hydraulically close to hold a part or fixture between them," explained Miller. "By extruding the abrasive media from one cylinder to the other, a honing action is produced wherever the media enters and passes through a restrictive passage."
In simple terms, the Extrude Hone process basically pumps a harsh and abrasive media compound through the port of a head or intake and the sand-like media smoothes out the port to make it better. The end result is a smoother, better flowing and cleaner finish. When discussing the advantages of the Extrude Hone process two things come to mind. For starters, the process is not expensive and ports that grinding materials can't reach are no problem for the pressurized media. The stuff can go anywhere air can go. There are no limits to its capabilities and that is why the process works so well.
Another advantage is that certain intake manifolds need to be cut in half due to their awkward shape and size in order for the porter to be able to access the inside of the unit. If the intake is not cut in half portions of it will not be able to be reached by a conventional porting tool. This is no match for the Extrude Hone process as the media can be pressed into virtually any shape. This also saves the intake owner the hassle of having to weld the intake back together after the porting job has been completed.
"The central element of the Extrude Hone process is the media, a polymer carrier mixed with abrasives. The viscosity of the carrier and the abrasive grain size, type and concentration can be varied to achieve specific finishing results," stated Miller. "When forced into a restrictive passage, the viscosity of the media temporarily rises, holding the abrasive particles rigidly in place. The media abrades the passage through which it flows only when in this restricted state. The viscosity returns to normal when the thickened portion of media exits the restrictive passage, producing no abrasion on areas such as threads or seal surfaces.
The tooling to perform such a job is equally impressive and very important towards the accuracy of the job. "The tooling holds the work piece in position and directs the flow of the media to the required areas," said Miller. "Many applications require only simple tooling: dies typically need no special tooling; the die passage itself provides the restriction for the flow path. For external edges or surfaces, tooling is used to restrict the flow between the outside of the part and the inside of the fixture. The tooling may also serve to restrict flow through areas that are to remain unaffected.
The Extrude Hone process is operated by a machine that is available in a variety of sizes and configurations. "The typical machine contains two vertically opposed media cylinders which hydraulically close to hold a part or fixture between them," explained Miller. "By extruding the abrasive media from one cylinder to the other, a honing action is produced wherever the media enters and passes through a restrictive passage."
LINCOLNATOR
New LVC Member
Say you wanna buy a polished intake manifold for the long block your going to have to purchase? lol