Does the 350 have variable valve timing?
02-25-2006, 08:36 PM
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All the nonrevup motors have it only on the intake side (or exhaust..but only 1 side) and the new revup motors have it on both sides. I think it kicks in at 3500rpm but i've never felt it. The tone of the car changes though, so thats my feeling. Either that or its truely variable and its always on..i have no clue personally. The honda ones are very high profile so u can hear them turn on
02-25-2006, 09:46 PM
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Originally Posted by enycepunjabi
yeaa!...I dont think anything can be close to a honda vtec..they truly are unique...I loved hitting vtec in my 01 prelude in 3rd gear. it was so pleasing
02-26-2006, 06:57 AM
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Nissan have what is called as Continuously Variable Valve Timing Control System (CVTCS). Its not the same as Vtec but same as i-Vtec in Honda or VVT-i in Toyota. The timing and phase of the cams is varied based on load, throttle position, engine/vehicle speed, camshaft angle, exhuast & intake gas parameters etc. So this helps it idle smoother, get better gas mileage while cruising and max performance when the driver demands it.
So essentially you wont feel any surge because it doesnt (mechanically/hydraulic press) kick in at a particular rpm, instead its always adjusting to meet the driver demands.
Hope that answers the question.
So essentially you wont feel any surge because it doesnt (mechanically/hydraulic press) kick in at a particular rpm, instead its always adjusting to meet the driver demands.
Hope that answers the question.
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08-27-2014, 12:54 AM
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computing more air
So since it's engaged all the time and changes based on load? Would you be able to get the same hp gain on a 370 with a cold air intake, exhaust, and a computer reprogramming as you would from a the same upgrades with new camshafts In a 350?
12-17-2014, 07:26 AM
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Pbn, just to save you from taking a beating from different car loyalists, Honda, while it makes a competent system, definitely was not first with this. Years before Honda, Nissan released a VVT system on the Z31 model of the 300ZX. Decades before Nissan Alfa Romeo and others used very effective systems. Eons before automotive use, variable cam profile (pilot engaged) systems appeared in the 20s on fighter airplane engines. Long before that some sophisticated steam engines had the ability to govern valve timing according to load factors.
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12-17-2014, 07:29 AM
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Pbn, just to save you from taking a beating from different car loyalists, Honda, while it makes a competent system, definitely was not first with this. Years before Honda, Nissan released a VVT system on the Z31 model of the 300ZX. Decades before Nissan Alfa Romeo and others used very effective systems. Eons before automotive use, variable cam profile (pilot engaged) systems appeared in the 20s on fighter airplane engines. Long before that some sophisticated steam engines had the ability to govern valve timing according to load factors.
Porsche was using a form of it in the 50's as well.
I'm glad someone else knows Honda wasn't the one who started this...
Last edited by Syner; 12-17-2014 at 07:30 AM.
12-17-2014, 07:42 AM
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Yikes! 8 years. Alby lead me astray by posting to this old thread and bringing it up to the top page. Also tell Syner, that it was two years before Honda, which qualifies as “years”. According to Google the Porsche system was only a patent, no cars built with it. Not to nitpick or anything.
12-17-2014, 07:46 AM
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Yikes! 8 years. Alby lead me astray by posting to this old thread and bringing it up to the top page. Also tell Syner, that it was two years before Honda, which qualifies as “years”. According to Google the Porsche system was only a patent, no cars built with it. Not to nitpick or anything.
It was 2 years, damn. And it looks like Porsche didn't even build anything with the patent!
The one (and only) time I was wrong in 2014.
12-26-2014, 10:55 PM
#17
Yikes! 8 years. Alby lead me astray by posting to this old thread and bringing it up to the top page. Also tell Syner, that it was two years before Honda, which qualifies as “years”. According to Google the Porsche system was only a patent, no cars built with it. Not to nitpick or anything.
but zEnthusiast13 bumped it from 8 years ago. my bad but i was addressing him from 3 months ago which is a reasonable amount of time. i got a good laugh about everyone rolling in here though lol 
01-03-2015, 04:38 PM
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