boost and the Vris system?

XxantwawnxX · Post by **XxantwawnxX** » November 9th, 2005, 6:28 pm

Anything i need to know about the vris system underboost? thanx again.(not sure but i think the search function is not working, i typed boost in the forced induction section and got nothing...)

PATDIESEL · Post by **PATDIESEL** » November 10th, 2005, 12:09 am

Some still use it and some don't. Most who boost more than about 5 pounds remove it since it is going to hinder the boost. However, since I'm not boosted I have no idea if you use the rear bank or the front when you lock the VRIS down on way or the other.

XxantwawnxX · Post by **XxantwawnxX** » November 10th, 2005, 1:59 am

Hey thanx alot! Hopefully somone with exp can give some light on the issue. but i doubt im going more then 4-5 psi so maybe ill just leave it be.

babyblueMX3 · Post by **babyblueMX3** » November 10th, 2005, 9:33 am

I rarely saw somebody run with the vris while beeing boosted
Take those otu of there

PATDIESEL · Post by **PATDIESEL** » November 11th, 2005, 1:22 am

So you take the butterflies out, which bank do you use to run the intake of air through? I can't imagine using both banks...

babyblueMX3 · Post by **babyblueMX3** » November 11th, 2005, 7:30 am

why not ? that's what it does when both butterflyes are open anyways
and the turbo will compensate for the little loss in the lower rpm range

XxantwawnxX · Post by **XxantwawnxX** » November 11th, 2005, 8:52 pm

Got this from a a site boosting a probe GT: So i gueess i tie them both open.

Intake Setup—VAF Placement/VRIS Plates Boost Start Full Boost

VAF before turbo, VRIS plates operating normally. 3800 RPM 4200 RPM

VAF before turbo, VRIS #1 tied open 3500 RPM 4000 RPM

VAF after turbo, no filter on inlet, VRIS plates normal 3000 RPM 3500 RPM

VAF after turbo, no filter on inlet, both VRIS plates open 2500 RPM 3000 RPM