Subject	If you want to keep a wide power band you do not delete VTC
Posted by	Greg D. (Specialty-Z) on August 23, 2011 at 6:37 PM
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In Reply To	At what point would you delete the vtc ? >>>> posted by xteam300tt on August 23, 2011 at 05:52 PM
Message	The dis-advantage of removing the VTC sprockets on a 500HP Z is either loosing 80 ft lbs torque, or loosing about 50HP. If you go with keeping the 80 ft lbs torque, your idle will be poor and the engine will die coming to a stop. The old dis-advantage of keeping the VTC was that the stock VTC sprockets would fail and become noisey in 5 to 10K miles of installing heavy duty valve springs and higher lift cams. Now that BDE has made stronger VTC sprockets available, there is not a down side. The advantage of keeping the VTC, it allows you to retain the wide power band and good idle.
Follow Ups	converting VTC for use on exhaust cams - JaffaUK 14:12:45 08/23/11 Why would you want to do that ? (n/m) - ztunerz 14:40:46 08/23/11 Nowhere near the bang for the buck as advancing the intakes - LitlElvis 16:28:15 08/23/11 Most people delete vtc when rhe upgrade cams. (n/m) - sandmanz32 17:15:54 08/23/11 At what point would you delete the vtc ? >>>> - xteam300tt 17:52:59 08/23/11 Doesnt installing adjustable gears render the system useless (n/m) - sandmanz32 18:05:50 08/23/11 Fixed sprockets, yes. BDE adjustable VTC sprockets, No. (n/m) - Greg D. (Specialty-Z) 18:21:40 08/23/11 ummm no... - twin3037 18:22:59 08/23/11 didnt know anyone offered adjustable vtc sprockets. Awesome! (n/m) - sandmanz32 18:40:14 08/23/11 I believe Sandman is referring to fixed - Greg D. (Specialty-Z) 18:48:49 08/23/11 If you want to keep a wide power band you do not delete VTC - Greg D. (Specialty-Z) 18:37:47 08/23/11 Not the best choice, but was common before BDE - Greg D. (Specialty-Z) 17:54:12 08/23/11 Having spent over 100 hours testing various cam positions - Greg D. (Specialty-Z) 18:18:44 08/23/11 So you would recommend using adjustable exhaust cams gears? (n/m) - Karl (MD) 18:29:15 08/23/11 For aftermarket cams, there is a bit of hidden power adding - Greg D. (Specialty-Z) 18:50:43 08/23/11 Makes sense to me Dr. D. but then we grew up with - ttz'in (NorCal) 18:31:46 08/23/11 Welcome to the new world that offers the best of both worlds - Greg D. (Specialty-Z) 18:52:04 08/23/11 Probably need a patent as well.. (n/m) - ttz'in (NorCal) 21:58:36 08/23/11 Sounds naughty :) (n/m) - ztunerz 20:14:03 08/23/11 It was hell on my fingers! (n/m) - Greg D. (Specialty-Z) 20:27:05 08/23/11 Indeed, those sprockets are tough.. (n/m) - ttz'in (NorCal) 22:04:24 08/23/11 just the answer I was looking for:) thanks! (n/m) - JaffaUK 04:08:35 08/24/11
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