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NeoVVL (Nissan Ecology Orientated Variable Valve Lift and Timing) is Nissan's answer to Vtec. The two systems are almost identical and both use the same concept of muliple cam lobes to provide a low rpm cam lobe ideal for bottom end torque and fuel ecomony and a high rpm cam optimised for hp. The only major differance with the Nissan system is that the intake and exhaust cams are triggered independantly for a more flat and consistant powerband.
Breifly there are 5 breeds of VE motors:
sr16ve N1 (race tuned and tweeked sr16ve)
sr16ve
sr20ve
sr20ve 20V (Reviewed version of the sr20ve with a better flowing head, coils and fly by wire)
sr20vet
The table below highlights the major differances between the two Nissan motors
|
Area |
SR20DE |
SR20VE |
|
Type |
All alloy, inline 4cyl |
All alloy, inline 4cly |
|
Valves |
4 per cyl, DOHC |
4 per cyl, DOHC, Indepentdanet Varible Valve Timing and lift. |
|
Bore X Stroke |
86x86mm |
86x86mm |
|
Displacement |
1998cc |
1998cc |
|
Power |
140HP |
187HP |
|
Torque |
178NM @ 4800 |
196.6NM @6000 |
|
Redline |
7500rpm |
7100rpm |
|
Crank |
8CW crank |
4CW light weight crank |
|
Compression ratio |
9.5:1 |
10.3:1 |
|
Released |
1991 |
1997 |
|
Identification |
Silver or champagne Rocker cover being the most common motors, Catch can on the front of the block. |
Black rocker cover "NeoVVl" badge, Oil solonoids near the distributer. |
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Images |
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Power Delivery |
The De Has a more conventional Torque curve peaking at 4800rpm and them dropping until redline this appears on most dyno sheets. |
The Ve has a much flatter curve peaking higher then the de closer to 6000rpm, but not dropping off as rapidlybefore or after it's peak value. This gives the motor great drivabilty. | |
