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Z32 VG30DE(TT) Late Model ('94+) VTC Sprockets Z32 VG30DE(TT) Early Model ('90-'93) R33 RB25DE(T) S14 and S15 SR20DE(T) Begining with the 1994 NA model Nissan changed their VG30DE VTC sprockets to a multi-piece unit with a separate outer drive cog; the TT followed suit in 1995. The internal mechanisms are the same as the early model VTC except for the substitution of using teflon sealing rings. Most importantly, the piston return spring is exactly the same as that which was used in the early model VTC, and this spring is the primary part which allows VTC noise to occur. At first glance the new VTC appear adjustable, similar to aftermarket race sprockets, but the bolts used to attach the cog are located on the back making them completely inaccessible once the sprockets are installed on the cams. These adjustment slots are more of a production aid which allowed the assembly worker to align the timing marks faster during manufacture. However in doing so, the bolts are typically not centered in the slots and do not allow an equal amount of adjustment from either side of zero. When BDE rebuilds late model VTCs, we set the bolts directly on center with the adjustment slot, allowing a full ±10° (crankshaft) of adjustment from either side of zero. Also, BDE relocates the adjuster bolts to the front of the sprockets making them truly user-adjustable when installed. Nissan has also offered this new style VTC as a service replacement with two different versions - one that will fit early (1990 to 1993) camshafts, and one that will fit only late (1994+) model camshafts. BDE has a limited quantity of cores for both versions, and these will only be sold as matched pairs. Please specify the version that you require when ordering. We prefer exchanged cores to be the same version as purchased, under no circumstances will early model VTCs be accepted as cores towards the purchase of late model VTCs.VG30DE(TT) 1994+ VTC Price - $575.00 per pair (+$400.00 Core Charge for '94+) More pictures are available below. Click on the image for a larger view. (this will open a new window)
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