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Discussion Starter · #1 ·
Does the GA16DE in a '98 Sentra have some kind of variable valve timing. My dad's b14 Sentra really surges at high revs in first gear. It feels like VTEC :rolleyes: but I'm wondering if Nissan had a similar system.
 

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Nissan VVL

From what I know, Nissan has a "vtec-like" system called NEOVVL--- a Variable Valve Lift system. I am pretty sure this is not present on any USDM spec motors to date... but can be found overseas on the V-code motors (SR20VE, VET) and others (RB26DETT, RB25DET, etc). The new Z could have VVL.
 

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Discussion Starter · #4 ·
Well if it's not variable valve timing what would make the engine surge like that???
 

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It is variable. As for the surge, I'm not sure, but I think I know what you mean. In my auto, when I drag launch from 1, it starts slow then at about 4000rpm or a little higher it pulls hard to redline. Maybe the VTC is "feelable" then...
 

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There is something definitely feelable passing 6 grand. I dont know too much about internals (and I might get ridiculed for this) but I always thought it was the second cam kicking in or something. But its the Variable valve timing adjusting the intake cam? Ok.
 

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in^3,N20,RPM,PSI
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200'side said:
There is something definitely feelable passing 6 grand. I dont know too much about internals (and I might get ridiculed for this) but I always thought it was the second cam kicking in or something. But its the Variable valve timing adjusting the intake cam? Ok.
W/ VTC you don't have the variable lift as w/ VTEC. (VVL has it tho). It adjusts the phase of the timing. Isn't the newer systems called CVTC? Well BMW and Ford also use this type of system... I think Toyota does too w/ their VVT-i and Hondas new VTEC systems also incorporate this technology...
 
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