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Location:
Melbourne
Registered:
June 2003
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ST162 TVIS
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Wed, 10 March 2004 00:27
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I did a search and there is a lot of articles tvis is good/bad... also the 4age is known to rev harder due to no tvis and the later nodel celicas to rev harder due to different port design.
My question is that if the intake manifold is changed to a later celica manifold from japan, would this increase power and revability?
only after doin extractors and hi flow cat i have been able to rev to 6000rpm mark...
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: ST162 TVIS
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Wed, 10 March 2004 00:30
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What exactly is TVIS?
Dan
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Location:
South Australia
Registered:
July 2002
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Re: ST162 TVIS
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Wed, 10 March 2004 00:42
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| Quote: |
only after doin extractors and hi flow cat i have been able to rev to 6000rpm mark...
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If that's the case then your car is effed - my car is standard and it revs to 7200 no problems.
TVIS is fine, leave it on. Unless you have modified the head and the intake port design then leave the TVIS on. Modifying the exhaust won't change the intake requirements enough to justify taking the TVIS off and/or getting another manifold from japan.
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Location:
Melbourne
Registered:
June 2003
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Re: ST162 TVIS
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Wed, 10 March 2004 00:57
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dont get me wrong, i can rev to 7200rpm... its just theres no usable power after 6000g range
i dont know ne one with a jap spec celica to see the difference.
TVIS (toyota variable induction system) Its supposed to help the torque curve at all ranges of rpm
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Location:
sydney,nsw.oz.
Registered:
July 2002
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Re: ST162 TVIS
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Wed, 10 March 2004 01:18
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Hey,
TVIS is supposed to boost low RPM torque.
It does this by blocking off half of the port to each cylinder thereby increasing the speed of the incoming air.
Once the revs get to a preset point, the ECU turns on the TVIS valve which unblocks that half of the port so you get more air coming in at high revs.
The 3SGE (Gen 1) makes maximum torque @ 4800 rpm and max.Power @ 6000rpm so not a lot of point revving past 6000rpm. If it had different cams it would probably make more power at higher revs. But the Gen 1 3SGE is getting old, and new cams would be hard to find.
Better off spending the money on a Gen2 or Gen 3. Gen 2 + 3 do not have TVIS.
My 2c worth!
Cheers
T.
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Location:
South Australia
Registered:
July 2002
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Location:
QLD, Gold Coast
Registered:
February 2004
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Re: ST162 TVIS
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Wed, 10 March 2004 10:04
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Hi
In regards to that jap spec celica, i have a jap spec celica with a 3sge and the t-vis, but i can tell you that after about 4,500 - 5 g rpm mark you can notice the increase in flow/accelation all the way to about 6,500, kinda does nothing after that..i have taken the car up to 8g's before, but that was in wet weather and just letting the wheels spin and the rpm's go all the way up to 8,500, don't think the car liked it though..i try to avoid it.
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Location:
sydney,nsw.oz.
Registered:
July 2002
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Re: ST162 TVIS
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Sun, 14 March 2004 02:44
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T-VIS
The real explanation
Courtesy of "http://www.dorikaze.ca/"
T-VIS stands for Toyota Variable Induction System. It came on two of Toyota's Sports-type Twin Cam engines, the 4A-GE (Corolla GT-S, MR2) and the 3S-GE (Celica). Here's how it works as described by Toyota*...
>> This system's intake passages are divided in two and a valve is placed in one side. Then, depending on engine rpm speed, the valve is opened or closed, which changes intake efficiency and improves performance across the rpm range. At low-to-mid rpm, the valve is closed. This effectively narrows the intake passage, which increases the speed of the air flow. Greater air flow speed results in greater volumetric efficiency, which boosts torque output at low-to-mid revs considerably. At high rpm, the valve is open, which reduces resistance within the intake passage and allows full development of the high-rev power potential inherent in the 4-valve configuration. <<
*info gathered from "Toyota Engine Technology"
Toyota part# PR-E-8905
printed in Japan 1989
T-VIS was used only on the first model of the 4A-GE (bluetop), being in all Corolla GT-S' (AE86's) and MR2's (from 85-87), and was then removed when the newer Corolla GT-S (AE92) equipped with a slightly more powerful version of the 4A-GE came into production.
For the 4A-GE's which are T-VIS equipped, the system will open the intake valve at approx. 4400 rpm. A noticeable <glitch> is usually heard when the T-VIS kicks in. It's more noticeable when a free-flowing aftermarket intake is installed.
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Registered:
June 2003
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Re: ST162 TVIS
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Mon, 15 March 2004 02:42
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GT-R just as a point of interest, I doubt that the 3sge can spin the wheels at an engine speed of 8,000rpm+ as from 7,500 the power curve drops off a cliff. In the dry if you drop the clutch and hold the throttle down all the way, the tacho will happily read out around 6,800 maximum, so the power after there isn't all that good.
And I thought the max power was at 6,000rpm? max torque at 4,800rpm? as tivs swaps at 4,500 isn't it?
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Location:
South Australia
Registered:
July 2002
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Re: ST162 TVIS
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Mon, 15 March 2004 02:48
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I can't be bothered digging up wheels magazine and finding out where the max power is.
I think T-VIS disengages at around about 4000rpm but I can't remember because it's been so long since I had my st162 on the road 
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Registered:
June 2003
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Re: ST162 TVIS
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Mon, 15 March 2004 02:51
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poor fella, it'll get there haha.. apparently you can get a certain set of cams which moves and almost makes the tvis change unnoticeable....
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Location:
South Australia
Registered:
July 2002
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Re: ST162 TVIS
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Mon, 15 March 2004 03:01
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Sounds like the VVTi from the beams...and if you had that you probably wouldn't need tvis
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Location:
Melbourne
Registered:
June 2003
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Re: ST162 TVIS
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Mon, 15 March 2004 06:57
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TVIS kicks in at 4300rpm
I tried to find out bout cams... but the price was goin to b to much to get aftermarket ecu and tune.
Im just goin to settle for reginds
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Registered:
June 2003
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Re: ST162 TVIS
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Mon, 15 March 2004 08:16
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There's an interesting question, could it be possible to do a beams head swap onto a gen 1 3sge? I'ld say you'ld need to replace all the internals as well but could you keep the block?
and run off the beams ecu obviously. because the beams engine itself is designed for upright usage, would it even be able to run in a 162 leaned back like that?
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Location:
Newcastle
Registered:
July 2003
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Location:
Melbourne
Registered:
June 2003
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Re: ST162 TVIS
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Tue, 16 March 2004 00:33
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True.... the gte is more cost effective..., but to have a high powered non turbo... is a must. Aswell to show what toyota can do up against the type R's and FTO's on the street.
Can teh 162 box fit the beams ge??
Y does the jap spec 162 come with better compression?
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Location:
Epping, Sydney
Registered:
April 2003
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Re: ST162 TVIS
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Tue, 16 March 2004 00:36
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better compression because it is designed for a higher octane fuel. Doesn't have to allow for crap ulp
the ecu is also mapped for better (higher octane) fuel.
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Location:
Sydney
Registered:
October 2004
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Re: ST162 TVIS
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Mon, 22 November 2004 04:16
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Man i have a 2nd GEN 3SGE from MR2
and FWDboy believed it NOT to have TVIS
but !!!
behold the big chunk of metal on top of my 3SGE which has a big 'TVIS' on it.... i'm now trying to figure out how this works?
If 2nd Gen never had TVIS, could this mean:
1/ My Engine is not a 2nd Gen 3SGE
2/ My Engine is 2nd Gen 3SGE but also hooked up to TVIS
3/ My setup is rotted~!
>_<
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Location:
Epping, Sydney
Registered:
April 2003
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Re: ST162 TVIS
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Mon, 22 November 2004 05:11
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1/ My Engine is not a 2nd Gen 3SGE
2/ My Engine is 2nd Gen 3SGE but also hooked up to TVIS
3/ My setup is rotted~!
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dude you need to chill 
1. it is most definitely a 2nd gen
2. YES!
3. and no
your setup is what lots of 162 toymodders wish they had 
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: ST162 TVIS
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Tue, 23 November 2004 01:02
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guy darsbb is having a jap spec 3sge. therefore his red line, max power etc would probably be different than aus spec ones.
keep ur tvis in there. If u want, u can disconnect the tvis and keep it open all the time by removing a few hoses. its somewhere in tech section
as for cams, try www.wadecams.com
give em a call and see if they have it. located in oakleigh melbourne. Reasonable priced cams
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