Honda/Honda94.jpg' alt='Honda Vtec Engine Manual' title='Honda Vtec Engine Manual' />Jazz EX 1. VTEC Manual with Metallic Paint OTR Price 17,615. The Jseries is Hondas fourth V6 engine family, introduced in 1996. It is a 60 V6 Hondas existing Cseries were 90 engines. The Jseries was designed for. Automakers arent giving up on the midsize sedan, and Honda has clearly placed some genuine effort behind the nextgeneration Accord. Read Honda Civic reviews specs, view Honda Civic pictures videos, and get Honda Civic prices buying advice for both new used models here. VTEC Wikipedia. VTEC Variable Valve Timing Lift Electronic Control vee teck is a system developed by Honda which was said to improve the volumetric efficiency of a four strokeinternal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at low RPM. The VTEC system uses two camshaft profiles and hydraulically selects between profiles. It was invented by Honda engineer Ikuo Kajitani. It is distinctly different from standard VVT variable valve timing which advances the valve timing only and does not change the camshaft profile or valve lift in any way. Context and descriptioneditJapan levies a tax based on engine displacement,3 and Japanese auto manufacturers have correspondingly focused their research and development efforts toward improving the performance of their smaller engine designs through means other than displacement increases. Honda Vtec Engine Manual' title='Honda Vtec Engine Manual' />HONDA VTEC B SERIES ENGINE GUIDE AND SPECIFICATION B16A B16B B18C B20 Tuning a vtec engine equipped car can be very interesting. A vtec engine is famous for producing. One method for increasing performance into a static displacement includes forced induction, as with models such as the Toyota Supra and Nissan 3. ZX which used turbocharger applications and the Toyota MR2 which used a supercharger for some model years. Another approach is the rotary engine used in the Mazda RX 7 and RX 8. A third option is to change the cam timing profile, of which Honda VTEC was the first successful commercial design for altering the profile in real time. The VTEC system provides the engine with valve timing optimized for both low and high RPM operations. In basic form, the single barring shaft lock of a conventional engine is replaced with two profiles one optimized for high RPM stability and fuel efficiency, and the other designed to minimize high RPM power output. The switching operation between the two cam lobes is controlled by the ECU which takes account of engine oil pressure, engine temperature, vehicle speed, engine speed and throttle position. Using these inputs, the ECU is programmed to switch from the low lift to the high lift cam lobes when the conditions mean that engine output will not be improved. At the switch point a solenoid is actuated which allows oil pressure from a spool valve to operate a locking pin which binds the high RPM cam follower to the low RPM ones. From this point on, the valves open and close according to the high lift profile, which opens the valve further and for a longer time. The switch over point is variable, between a minimum and maximum point, and is determined by engine load. The switch down back from high to low RPM cams is set to occur at a lower engine speed than the switch up representing a hysteresis cycle to avoid a situation in which the engine is asked to operate continuously at or around the switch over point. The older approach to timing adjustments is to produce a camshaft with a valve timing profile that is better suited to low RPM operation. The improvements in low RPM performance, which is where most street driven automobiles operate a majority of the time, occur in trade for a power and efficiency loss at higher RPM ranges. Excel Vba Serial Port Programming. Correspondingly, VTEC attempts to combine low RPM fuel efficiency and stability with high RPM performance. HistoryeditVTEC, the original Honda variable valve control system, originated from REV Revolution modulated valve control introduced on the CBR4. HYPER VTEC. In the regular four stroke automobile engine, the intake and exhaust valves are actuated by lobes on a camshaft. The shape of the lobes determines the timing, lift and duration of each valve. Timing refers to an angle measurement of when a valve is opened or closed with respect to the piston position BTDC or ATDC. Lift refers to how much the valve is opened. Duration refers to how long the valve is kept open. Due to the behavior of the working fluid air and fuel mixture before and after combustion, which have physical limitations on their flow, as well as their interaction with the ignition spark, the optimal valve timing, lift and duration settings under low RPM engine operations are very different from those under high RPM. Optimal low RPM valve timing lift and duration settings would result in insufficient filling of the cylinder with fuel and air at high RPM, thus greatly limiting engine power output. Conversely, optimal high RPM valve timing lift and duration settings would result in very rough low RPM operation and difficult idling. The ideal engine would have fully variable valve timing, lift and duration, in which the valves would always open at exactly the right point, lift high enough and stay open just the right amount of time for the engine speed in use. DOHC VTECeditIntroduced as a DOHC Double overhead camshaft system in Japan in the 1. Honda Integra1 XSi which used the 1. W B1. 6A engine. The same year, Europe saw the arrival of VTEC in the Honda CRX 1. VT, using a 1. 50 bhp variant B1. A1. The United States market saw the first VTEC system with the introduction of the 1. Acura NSX,4 which used a 3 litre DOHC VTEC V6 with 2. W. DOHC VTEC engines soon appeared in other vehicles, such as the 1. Acura Integra GS R B1. A1 1. 7 litre engine, and later in the 1. Honda Prelude VTEC H2. A 2. 2 litre engine with 1. Honda Del Sol VTEC B1. A3 1. 6 litre engine. The Integra Type R 1. Japanese market produces 1. W 2. 00 PS using a B1. C5 1. 8 litre engine, producing more horsepower per litre than most super cars at the time. Honda has also continued to develop other varieties and today offers several varieties of VTEC, such as i VTEC and i VTEC Hybrid. SOHC VTECeditAs popularity and marketing value of the VTEC system grew, Honda applied the system to SOHC single overhead camshaft engines, which share a common camshaft for both intake and exhaust valves. The trade off was that Hondas SOHC engines benefitted from the VTEC mechanism only on the intake valves. This is because VTEC requires a third center rocker arm and cam lobe for each intake and exhaust side, and, in the SOHC engine, the spark plugs are situated between the two exhaust rocker arms, leaving no room for the VTEC rocker arm. Additionally, the center lobe on the camshaft cannot be utilized by both the intake and the exhaust, limiting the VTEC feature to one side. However, beginning with the J3. The King Of Fighters 2002 Unlimited Match Ps2 Iso Game on this page. A4 3. 7. L SOHC V6 engine introduced on all 2. Acura TL SH AWD models, SOHC VTEC was incorporated for use with intake and exhaust valves. The intake and exhaust rocker shafts contain primary and secondary intake and exhaust rocker arms, respectively. The primary rocker arm contains the VTEC switching piston, while the secondary rocker arm contains the return spring. The term primary does not refer to which rocker arm forces the valve down during low RPM engine operation. Rather, it refers to the rocker arm which contains the VTEC switching piston and receives oil from the rocker shaft. The primary exhaust rocker arm contacts a low profile camshaft lobe during low RPM engine operation. Once VTEC engagement occurs, the oil pressure flowing from the exhaust rocker shaft into the primary exhaust rocker arm forces the VTEC switching piston into the secondary exhaust rocker arm, thereby locking both exhaust rocker arms together. The high profile camshaft lobe which normally contacts the secondary exhaust rocker arm alone during low RPM engine operation is able to move both exhaust rocker arms together which are locked as a unit. The same occurs for the intake rocker shaft, except that the high profile camshaft lobe operates the primary rocker arm.