vti or no vti?

Bahhhh... just cause I got some gizzmo called VVTL-i or something Geff lol (tell me I spelt it right for once XD)

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Originally Posted by SeverAMV

well the last vti system i saw used a sliding camshaft design with a progressive trapezoid shaped lobe. as you adjust your throttle position, it slides down to utilise the width of the base of the trapezoid to maximise valve duration.
hence it was valve timing with intelligence.

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Homer: Got any of that beer that has candy floating in it? You know, Skittlebrau?
Apu: Such a beer does not exist, sir. I think you must have dreamed it.
Homer: Oh. Well, then just give me a six-pack and a couple of bags of Skittles.

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Originally Posted by Weq

You like, 12yrs old right? How does increasing duration and valve lift in any way help fuel consumption??? SOHC vtec has a secondary loab profile on the intake cam. Its a pretty simple concept actuallyYYYYYYYYYYYYYYYYYYY!!!!!

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Close, I'm actually 11.

SOHC lets the engine have very low valve lift and decreased duration at low RPM, and then switching to regularly profiled lobes at middle to high RPM. :) If a non-variable valve engine was fitted with low valve lift cams, then it would not make enough torque at mid-range RPM.

In SOHC VTEC, there is enough space only for VTEC on the intake cams. So it is used to improve mixing at low RPM instead. If it had a high lift profile but kept the exhaust cam lift the same throughout the RPM range, the engine wouldn't be able to evacuate all the exhaust gases in time for the next cycle.

Quote:

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Originally Posted by SeverAMV

well the last vti system i saw used a sliding camshaft design with a progressive trapezoid shaped lobe. as you adjust your throttle position, it slides down to utilise the width of the base of the trapezoid to maximise valve duration.
hence it was valve timing with intelligence.

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A Honda Civic is not an F430. Put down that bong please. :zip:

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Originally Posted by aaronng

A Honda Civic is not an F430. Put down that bong please. :zip:

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and where in that post did i say it was a honda? thats the only vti system i've seen, and its not my fault honda use the vti abbreviation differently.

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Originally Posted by SeverAMV

and where in that post did i say it was a honda? thats the only vti system i've seen, and its not my fault honda use the vti abbreviation differently.

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We were talking about a Civic Coupe. Not another brand of car.

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Originally Posted by aaronng

SOHC VTEC = great fuel consumption!
DOHC VTEC = what fuel consumptioBAAAAAAAAAAAAAAAAAAAAAA!!!!!

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ooooh man me new sig...

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Originally Posted by Sydsyd

vti:confused: u mean the vtec?

first, u have to check ur engine code ie D16Yx where x tells u whether it has vtec (Y8) or not (Y4)...if urs is D16Y8 then u'd hear vtec on around 6600rpm and above (i think that's the stock activation point)...if it's a D16Y4, then u'll have to imagine having a vtec:p

the earlier civic coupes (EJ8) has 2 models/ranges (i think): GLi (D16Y4 SOHC Non-VTEC) and VTi (D16Y8 SOHC VTEC)...

pls feel free to correct me if i have wrote something wrong:)

what do u mean by 3.5 inch cannon? if u think it's too loud, then change the muffler to a smaller one...

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yeha mines a y4 so i guess i have to imagine i have a vtec, sigh!! so much for me getting soo excited!! hahah

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Originally Posted by misterandyle

yeha mines a y4 so i guess i have to imagine i have a vtec, sigh!! so much for me getting soo excited!! hahah

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dont worry, that happens with a b series too. All these people just imagine the power.

I mean think about it, people on here actually think they feel the diffrence between a airbox and a pod filter

louder = faster

every honda driver knows this...


gettin a tad sick of all the vtec threads around. sum1 put up a sticky with big, bold letters explaining it :p

VTEC is overrated. I'll say it again. VTEC IS OVERRATED.

Unless you have an S2000 or Type R - something aggressive.

Enjoy your EJ8 for what it is. lucky you, getting a coupe. nice cars. I want...

I'm currently driving an EJ8 and vtec on this car is so soft, it doesnt seem to be there lol. When vtec engages there dont seem to be a power boost just gets a big loud...