klt? removed vris?

hgallegos915 · Post by **hgallegos915** » December 28th, 2005, 6:43 pm

I hope this isnt a repost..i tried searchign.anywho

http://cgi.ebay.com/ebaymotors/Mazda-KL ... enameZWD2V

i mean yes its a good engine...but itneresting is that he claims he ported the manifold and REMOVED restrictive vris... isnt the vris what gives our cars the boost at higer rpms? what happens if we remove em and port the manifold?? anyone? will it run like krap? I got an extra manifold i would like to play with and access to a machine shop.

MX3parkerGS · Post by **MX3parkerGS** » December 28th, 2005, 10:33 pm

well VRIS opens and closes throughout the rpm's right?('boosting' our car when it is open), if its removed thatd make it on 'boost mode' if u will lol all the time wouldnt it?

me=not too familar with VRIS

Rick Johnson · Post by **Rick Johnson** » December 28th, 2005, 11:19 pm

Most people who go turbo remove their VRIS. VRIS is only beneficial to N/A vehicles.

slimmyslim1420 · Post by **slimmyslim1420** » December 28th, 2005, 11:48 pm

Would you have to port the Manifold to remove the VRIS? Or what would be the process of doing so? Is it a lot of work or a few small modifications?

PATDIESEL · Post by **PATDIESEL** » December 29th, 2005, 1:02 am

First of all, VRIS will be beneficial to either a NA or Turbo engine. However, less so to a turbo (but only alittle less). The problem would be getting enough vacuum to open or close the VRIS butterflies under boost. You also could have the VRIS break and then get into the combustion chamber. So most people just ditch it and forget about the problems that it might cause.

Removing it is easy. It is a few screws and the VRIS butterflies and then sliding out the VRIS shaft and blocking it off where it exits the manifold. The hard part is getting the maifold off and then taking it down to it's two pieces to get at the VRIS.

Porting the manifold is a good idea if you ae running a higher boost engine. On a NA motor it is not needed b/c the lose in air velocity would make for poor power in the low end. You can port our intakes with acid or extrude honing (running a thick paste sand material through it which basically sands the intake from the inside) Both are best done by professionals. VRIS would need to be removed if you port the intake b/c the VRIS plates would then not block the air and thus you would be basically running without VRIS anyway.

PS, removing the VRIS will not effect the car electronically in any way. The car only sends signals to the VRIS it does not take any information from them.