0

Vtec - What makes a Vtec

posted by ace®on Tuesday, October 29, 2013

This picture show us the components or parts in Vtec engines. (Click pic to enlarge) This is what makes a Vtec.
1.   cylinder head
2.   camshaft holder plates
3.   camshaft caps
4.   JDM valve cover
5.   valve spring assembly
6.   valve assembly
7.   rocker arm assembly
8.   rocker arm shafts
9.   camshafts
10. crank pulley components
11. timing belt tensioner
12. waterpump
13. oil pump front cover
14. oil pump rear cover
15. oil pump gears
16. flywheel side cover
17. Vtec solenoid
18. camshaft pulleys
[.....]

Continue reading
0

Vtec - B Series

posted by ace®on Tuesday, October 29, 2013

HONDA VTEC B SERIES ENGINE GUIDE AND SPECIFICATION B16A B16B B18C B20

B16A ENGINE(BIG VTEC) B16A
Note: All JDM B16A engines are stamped ‘B16A’ (with no number after the “A” to identify version).
VTEC
Found in:
1988-1991 JDM Honda Integra RSi/XSi (DA6/DA8)
1988-1991 JDM Honda CRX SiR (EF8)
1988-1991 JDM Honda Civic SiR (EF9)
Displacement: 1,595 cc (97.3 cu in) 1.6 liter
Compression: 10.2:1
Rod/stroke ratio: 1.74
Power: 158 hp (118 kW) @ 7600 rpm & 111 ft·lbf (150 N·m) @ 7000 rpm
Transmission: S1/J1/Y1
Redline: [.....]

Continue reading
0

Vtec - SOHC

posted by ace®on Tuesday, October 29, 2013

As popularity and marketing value of the VTEC system grew, Honda applied the system to SOHC (Single Over Head Cam) engines, which share a common camshaft for both intake and exhaust valves. The trade-off was that Honda's 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 [.....]

Continue reading
0

Vtec - DOHC

posted by ace®on Tuesday, October 29, 2013

Introduced as a DOHC system in Japan in the 1989 Honda Integra XSi which used the 160 bhp (120 kW) B16A engine. The same year, Europe saw the arrival of VTEC in the Honda CRX 1.6i-VT, using a 150 bhp variant (B16A1). The United States market saw the first VTEC system with the introduction of the 1991 Honda NSX, which used a 3-litre DOHC VTEC V6 with 270 bhp (200 kW). DOHC VTEC engines soon appeared in other vehicles, such as the 1992 Acura Integra GS-R (B17A1 1.7-litre engine), and later in the [.....]

Continue reading
0

Vtec - History

posted by ace®on Tuesday, October 29, 2013


VTEC, the original Honda variable valve control system, originated from REV (Revolution-modulated valve control) introduced on the CBR400 in 1983 known as 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 [.....]

Continue reading
0

Vtec - Description

posted by ace®on Tuesday, October 29, 2013

VTEC (Variable Valve Timing and Lift Electronic Control) is a valvetrain system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine. This system uses two camshaft profiles and electronically selects between the profiles. It was invented by Honda R&D engineer Ikuo Kajitani. It can be said that VTEC, the original Honda variable valve control system, originated from REV (Revolution-modulated valve control) introduced on the CBR400 in 1983 known as HYPER VTEC. VTEC was the first system of its kind. Different types of variable [.....]

Continue reading
Next PostNewer Posts Home