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Old 07-17-2004, 04:11 PM   #1
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VTEC vs SVTF variable valve timing

What's the difference between the vtec and the variable valve timing on the svtf?


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Old 07-17-2004, 04:15 PM   #2
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umm basically nothing they both do the same thing, lots of ppl think that vtec gives u more power and all that bs but it was really made to improve gas mileage which it does a lot, ford just has to call it something else just like all the companies lets see u got vtech zetech vspec all sorts of crap like that.
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Old 07-17-2004, 04:30 PM   #3
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i thought the svt had variable CAM timing??? anyways, the vtec in hondas is basically where the valvetrain switches between camshaft lobes and keeps the valves open for a longer duration, with more overlap. there IS an increase in horsepower (go look at an rsx-s dyno sheet and you will see a considerable jump in horses). i believe the svt either advances or retards the timing depending on the driving conditions, never changing cam lobes, like honda/acura.
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Old 07-17-2004, 05:32 PM   #4
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found a link, looks like they copied their info from some propeganda from ford... dunno how acurate it is though. Looks like it's got the variable exahust cam timing from the reg zetec + intake cam timing for the svt.

http://www.fast-autos.net/ford/fordsvtfocus.html

edit:

found another (similar) link:
http://www.fordmuscle.com/archives/2...us/index.shtml
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Old 07-17-2004, 05:40 PM   #5
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^^ That link is correct, the SVT engine has variable cam timing on the intake camshaft. That is all. Why I dunno but I would guess emissions or for fine tuning more than any real performance gains. AFAIK (and I could be wrong, its been known to happen) Ford doesn't currently offer any Honda VTEC-like system on their engines.
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Old 07-18-2004, 11:10 AM   #6
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Quote:
Originally posted by itsalex17
umm basically nothing they both do the same thing, lots of ppl think that vtec gives u more power and all that bs but it was really made to improve gas mileage which it does a lot, ford just has to call it something else just like all the companies lets see u got vtech zetech vspec all sorts of crap like that.


please research before you post. Theres a big difference between the two. Ever been in an H22 hatch with all the bolt-ons? No? Ride in one of those and tell me Vtec doesnt give you more power after the crossover.

Vtec (no H) = Variable Valve Timing and Electronic Lift Control
Zetech = thats just the name of the engine itself
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Old 07-18-2004, 02:28 PM   #7
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Good reply, I was to stunned by that comment to post.
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Old 07-18-2004, 04:25 PM   #8
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Quote:
Originally posted by CivicHatch+SVT-F
Vtec (no H) = Variable Valve Timing and Electronic Lift Control
Zetech = thats just the name of the engine itself
Zetec doesn't have an "h" in it either...
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Old 07-18-2004, 05:16 PM   #9
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I have noticed people getting the variable rate intake systems, once TM'd as VRIS common on Ford adapted powerplants (including Zetec & SVTF) since the auto-alliance with Mazda, confused with the VTEC system. Totally different systems with similiar names.
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Old 07-18-2004, 06:45 PM   #10
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It seems like all the manufacturers are adapting variable camshaft/variable valve timing. Mitsubishi has their Mivec, Toyota has the VVT-i, Nissan, etc.
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