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Location:
Melbourne
Registered:
May 2004
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 TVIS??????
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Thu, 01 July 2004 01:56
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 Can someone please tell me what TVIS is and what it does. Thanks and yes i have searched but nothing answers my q in lehmanns terms?
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Location:
Inside a giant turbo (syd...
Registered:
June 2002
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Re: TVIS??????
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Thu, 01 July 2004 02:03
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google is your friend 
http://www.geocities.com/MotorCity/7177/4ageengine s.html
TVIS is a set of butterflies that close off one of the intake valve ports below 4500 rpm to increase air flow and fuel atomisation. They are operated by manifold vacuum
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Location:
Melbourne
Registered:
May 2004
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Re: TVIS??????
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Thu, 01 July 2004 02:10
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Cheers spanktown. Just one more for ya in regards to the rwd 4age large port manifold. I am looking to use one of these for a turbo conversion on a 4agze. Now does this manifold have tvis cos im of the understanding that if it didn't come with tvis then no mods are required to the intake manifold in terms of alloy welding the valleys for the turbocharging?
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Location:
Inside a giant turbo (syd...
Registered:
June 2002
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Re: TVIS??????
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Thu, 01 July 2004 03:53
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well the manifolds dont actually 'have' tvis... its a plate that is about just under an inch thick which goes between the intake manifold and the head. Now ive been told that if you remove the butteflies from this plate but still use the plate between the manifold and the head you dont have to weld the manifold at all.
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Location:
Melbourne
Registered:
May 2004
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Re: TVIS??????
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Thu, 01 July 2004 05:52
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Cool man. Im sure it will make more sense when i actually see it. Thanks a lot for your help. 
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Location:
Inside a giant turbo (syd...
Registered:
June 2002
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Re: TVIS??????
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Thu, 01 July 2004 08:27
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no problem mate. I used to have a 4agte sprinter, now ive got a 4agte mr2.
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Location:
Melbourne
Registered:
May 2004
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Re: TVIS??????
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Thu, 01 July 2004 09:48
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Its good to know you had a sprinter the same as what im beginning to build up. Thanks for ya help and il be in touch.
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