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Write ups and tutorials for maintenance and modifications.
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[How to] Disconnect the T-VSV system

Tue Sep 19, 2006 8:31 pm


Or go to http://www.turbocelica.nl --> Tuning --> How to.. --> How to disconnect the T-VSV system
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Last edited by Meurz on Sun Mar 22, 2009 8:59 pm, edited 1 time in total.

Fri Aug 08, 2008 9:52 pm

hi meurz...
"However, without fitting a boostcontroller, the boost will be 50 instead of 70 kPa in all gears"


I did not understand this part...if i cut the t-vsv,the boost pressure remains 0.5 bar in all gear?

i have this problem in my celica...the turbo pressure never up 0.5 bar...it is possible that my mechanic has not connected the t-vsv :roll:

Tue Sep 02, 2008 8:09 am

the TVSV gives you aoption to have higher boost in 3rd+ gears. when you disable TVS, you dont have it. so it will not be above 0.5bar without a boost controller. that is what you need if you want to raise boost pressure. do at your own risk of course. :)

Sat Aug 29, 2009 4:13 pm

is there a how to for the st205? or is it basically the same thing?

Mon Aug 31, 2009 9:53 am

It should be the same. If st205 has TVSV at all? It doesn`t have the TVIS, but that`s another story..

Block off the second line from the actuator to VSV under intake runners. (the first one goes to turbo).

Re: [How to] Disconnect the T-VSV system

Fri Feb 06, 2015 5:47 pm

Seems easy to do but what if you dont have the t-vis and turbo VSV's or the vacuum tanks. i got my 2nd gen jdm spec 3sgte a while back to do my swap. i noticed were the accurator goes is missing and blocked of with two screws. the harness also had the t-vis and turbo VSV's unpinned, im guessing due to no vsv's being present. so my question is how do i delete my T-VIS or has it been taken care of and all i would have to do is block of the hose from the wastegauge?
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