What is VTEC exactly? (explination inside)
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Sedans > Coupes
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What is VTEC exactly? (explination inside)
I really wasn't sure where to put this, so if a mod could kindly move it to the right spot, that'd be nice.
For anyone wondering exactly how VTEC works, here's an excellent video explaining it.
[autostream]http://autostream.com/ibcivicforums/?page_type=firebirdplayerthumbnail&framepage=103&t ransactionid=1303341497-17317719392&posted_by=Brian1037_www.civicforums.co m&youtube_video_id=nc800hkqY2M[/autostream]
For anyone wondering exactly how VTEC works, here's an excellent video explaining it.
[autostream]http://autostream.com/ibcivicforums/?page_type=firebirdplayerthumbnail&framepage=103&t ransactionid=1303341497-17317719392&posted_by=Brian1037_www.civicforums.co m&youtube_video_id=nc800hkqY2M[/autostream]
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From: TN
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Re: What is VTEC exactly? (explination inside)
Good one. more visual explanation of the system than only words.
I will have to warn though that that is true for the B/K-series, they have a more aggressive cam that is engaged.
The D-series however have a different VTEC, called VTEC-E (Economy). basically you only have full 4 valves when VTEC activates, before that the D simply work as 3 and a 1/4 (or less) valve engine.
Activation method is same, what they activate is not.
Also, never mix this with the cam gear valve timing control (other makers) they just move the cam forth more or less
Only honda changes the cam lobe profile. The i-VTEC includes the cam gear position control as well.
I will have to warn though that that is true for the B/K-series, they have a more aggressive cam that is engaged.
The D-series however have a different VTEC, called VTEC-E (Economy). basically you only have full 4 valves when VTEC activates, before that the D simply work as 3 and a 1/4 (or less) valve engine.
Activation method is same, what they activate is not.
Also, never mix this with the cam gear valve timing control (other makers) they just move the cam forth more or less
Only honda changes the cam lobe profile. The i-VTEC includes the cam gear position control as well.
Last edited by sdaidoji; Apr 20, 2011 at 07:06 PM.
Thread Starter
Sedans > Coupes
Joined: Aug 2010
Posts: 625
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From: Montreal
Rep Power: 197 Re: What is VTEC exactly? (explination inside)
Good one. more visual explanation of the system than only words.
I will have to warn though that that is true for the B/K-series, they have a more aggressive cam that is engaged.
The D-series however have a different VTEC, called VTEC-E (Economy). basically you only have full 4 valves when VTEC activates, before that the D simply work as 3 and a 1/4 (or less) valve engine.
Activation method is same, what they activate is not.
Also, never mix this with the cam gear valve timing control (other makers) they just move the cam forth more or less
Only honda changes the cam lobe profile. The i-VTEC includes the cam gear position control as well.
I will have to warn though that that is true for the B/K-series, they have a more aggressive cam that is engaged.
The D-series however have a different VTEC, called VTEC-E (Economy). basically you only have full 4 valves when VTEC activates, before that the D simply work as 3 and a 1/4 (or less) valve engine.
Activation method is same, what they activate is not.
Also, never mix this with the cam gear valve timing control (other makers) they just move the cam forth more or less
Only honda changes the cam lobe profile. The i-VTEC includes the cam gear position control as well.
You give really good explanations. Thanks for informing everyone
@lito99 thank you
Last edited by Brian1037; Apr 20, 2011 at 07:29 PM.
:thumb: 
Joined: Dec 2008
Posts: 15,167
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From: TN
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follow the explanation of the VTEC-E - lots of controversy, but it was cleared in the end, so disregard all the bitching.
https://www.civicforums.com/forums/7...sy-solved.html
https://www.civicforums.com/forums/7...sy-solved.html
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he didnt explain what the vtec sticker does though...i put 8 of those on my car and im sure i added like 100hp+ i just dont know how my car puts it onto the road 
nice find
nice find
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Re: What is VTEC exactly? (explination inside)
EDIT: The truth is I don't really have a CIVICFORUMS.COM sticker yet, I'm waiting for red ones to be available. I really got those 10 horsepowers from stick on breather vents.
Last edited by thefatalepic; Apr 21, 2011 at 07:53 PM.
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When I get a chance I'll check to see how my CIVICFORUMS.COM sticker works - I'm sure the technology is similar. I slapped one of those babies on my bumper and got 10 whole horsepowers from it.
EDIT: The truth is I don't really have a CIVICFORUMS.COM sticker yet, I'm waiting for red ones to be available. I really got those 10 horsepowers from stick on breather vents.
EDIT: The truth is I don't really have a CIVICFORUMS.COM sticker yet, I'm waiting for red ones to be available. I really got those 10 horsepowers from stick on breather vents.
my favorite breather vents are the ones that have carbon fiber in them, although they dont let any air into the engine bay, im sure that they add 10 horsepower OVER the ones without carbon fiber. only because carbon fiber=more power! (add tim taylor grunt here)
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