No. Next time you drive your car, listen, and use your head. The secondary butterflies open at 5000 rpm. If yours don't, then maybe you have a problem, but mine have since I bought the damn thing. Try doing a little more work. and the 22 hp. thing, i didn't mean to make it sound like fact, it was something that i was told, and thought i would throw that tid bit out there. Personally, i don't believe it either, i can see about 8.chimmike said:
What are you hearing open up when the tach hits 5k? Unless the tach is off as far as the speedo is on these cars. LOL. I have a CAI and when it gets alot louder, the tach reads 5 on the button. Is there something else making the noise? Not trying to question you, just trying to learn.chimmike said:
Yup, you got it right. All the BS about the cam profile changing is just that, BS. It would be imposible to change the profile of a solid state cam. Thus far motor technology dictates that you can only change the way an engine runs with a specific cam and internal setup not the other way around.B13Sentra2DR said:VTEC operates on oil pressure. The computer tells a solenoid to open up and the oil pressure moves a pin into place activating extra rocker arms that contact the agressive cam lobes.
tryptych said:No. Next time you drive your car, listen, and use your head. The secondary butterflies open at 5000 rpm. If yours don't, then maybe you have a problem, but mine have since I bought the damn thing. Try doing a little more work. and the 22 hp. thing, i didn't mean to make it sound like fact, it was something that i was told, and thought i would throw that tid bit out there. Personally, i don't believe it either, i can see about 8.
You may see powergains if you are running a turbo system with an untuned safc, then after you tune the safc you may see power gains. On an NA car it doesnt do anything really. And yes butterfly valves do open around 5400-5500rpm ishchimmike said:
"Continuous Valve Timing Controller" Try the A'PEXi SAFC-II. Im petty sure that you cant change the RPM that CVTC "cracks" though.04SerSpecV said:Hi all
My question is is there anyway to have that kick in before 5000rpm. Like does anyone make a controler for that ex: the A'PEXi V-TEC AFC II. If so please let me know also if not will there ever be one in the future?
Just so you know, you can only hear the difference going down the road with a spec-v. Revving it at idle only makes it bark really loud. Also, you cant rev them from under the hood. There is no throttle cable, its all electronic controlled.modenaf1 said:Is there a way to see the runner control? In my '96 Taurus you can see the butterflies snap open at 3500RPM from under the hood. Just put it in neutral and yank the throttle cable until you see movement, if they work or not. That might be easier than trying to listen to it as you rev past 5K.
The BSR, aftermarket valves, and aftermarket valvesprings will NOT increase your rev limit. Your rev limit is set within your ECU. The three above mentioned things simply increase the safety of raising your rev limit.I don't know why you would want to change it, It's set to 5000rpm because it's doing a job. The QR25de in it's natural state loses major power at 5000rpm, and they put the system in to increase airflow and keep power somewhat consistent. If you want more time in CVTC, order the Jim Wolf Technology Balance Shaft Removal(BSR) and valves and valvesprings, this will increase the rev limit to 7200rpm.