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Gentle Ben
Site Subscriber
Joined: 07 Oct 2004
Posts: 2281
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Fri May 27, 2005 10:52 am |
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What's this all about then? Just pulled up at the lights behind a relatively new Corsa with a 'Twinport' badge underneath?
Assume it means there are two inlet ports per cylinder, suppose it helps by increasing turbulence and mixing in the cylinder? |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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Mon May 30, 2005 8:14 am |
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sort of. Its utter balls anyway, if you saw the head you would laugh at it |
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huwwatkins
Site Subscriber
Joined: 10 Jun 2004
Posts: 2317
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Mon May 30, 2005 9:13 am |
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Got a pic of the head? could do with a good laugh... |
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Xvisor
Level 7 User
Joined: 06 Sep 2004
Posts: 230
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Mon May 30, 2005 10:10 am |
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Just reading the post and seeing chris his reply already gives me a good laugh ... In holland we would call him a "droogkloot" which is a positive word!! |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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Mon May 30, 2005 1:41 pm |
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it something to do with efficiency. i think somethig along the lines of one inlet valve can be controlled independantly to the other...
a bit like one of the variations of VTEC, on inlet valve for low, efficient rpm, then the other kicks in for higher more power rpm. i-VTEC i thnk |
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Dan
Site Subscriber
Joined: 28 Jan 2005
Posts: 3547
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Mon May 30, 2005 2:04 pm |
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the vtec system has a high lift lobes built into the cam, at certain revs, the set of follwers that are on the high lift lobes, lock into the regular followers, and then its all high lift |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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Tue May 31, 2005 12:28 am |
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basically its just like what toyota has been doing since the 80's.
Its a butterfly that closes off half the port at low revs to get bettwer swirl at low rpm's to help power.
Thing is the donkeys of toyo is better. |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Tue May 31, 2005 3:45 am |
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| danlp6 wrote: |
| the vtec system has a high lift lobes built into the cam, at certain revs, the set of follwers that are on the high lift lobes, lock into the regular followers, and then its all high lift |
aye thats std VTEC there is also i-VTEC and VTEC-E
in fact i think i got it wrong....VTEC-E is the one that operated the two inlets independantly...VTEC-i has variable cam timing as well as VTEC-E |
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mals
Self Proclaimed Comic Genius
Joined: 04 Jul 2004
Posts: 3482
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| Posted:
Thu Jun 02, 2005 12:41 am |
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There we go! Get your laughing gear round that |
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JB
Mr Quoter-vator
Joined: 16 Feb 2004
Posts: 7405
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| Posted:
Thu Jun 02, 2005 3:08 am |
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aye from that tiny pic it appears to be closing off one port for economic driving. |
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