QUOTE(asrul @ Nov 4 2012, 09:36 PM)
what is the purpose of IAFM?
When the Campro first came out, before the CPS and IAFM, the engine "featured" a notorious torque dip between the 2k-3k RPM. That means, when at 2k-3k RPM, you will feel that your engine is underpowered, until beyond 3k RPM when the torque suddenly recovers. Unfortunately, for daily driving, especially for AT cars, most cars run at that crucial 2k-3k range most of the time, and many people have cursed Campro and Proton for this shortcoming.
When CPS came out, it featured a variable intake manifold (VIM), which is essentially a mechanism that regulates air intake speed depending on the RPM. When below 4k RPM, the air going into the intake manifold is slower, whereas beyond 4k RPM, the air is allowed to enter the manifold at a higher speed. This mechanism overcame the torque dip and introduced a much smoother torque curve to the Campro engine. Don't ask me how it did that, I don't know the exact details as to how the VIM eliminated the torque dip.
The IAFM functions the same way as the VIM, the only difference is that the VIM is electronically controlled by the ECU, whereas the IAFM is mechanically controlled by intake vacuum. If you removed the IAFM or your IAFM malfunctions, you will notice that your car is underpowered at the 2k-3k RPM.
Added on November 4, 2012, 11:33 pmQUOTE(Maxwell6635 @ Nov 4 2012, 10:12 PM)
Hi all,disable abs will increase my brake performance ?^^my foreman say so...^^
Re-iterating what others have mentioned, it is irresponsible for your foreman to make such suggestions. Carmakers invested untold amount of money to develop the ABS for road cars, it is not a useless mechanism.
Unless your car is meant for track racing, otherwise keep the ABS.
This post has been edited by dares: Nov 4 2012, 11:33 PM