Has anyone removed or disabled The VTCS??

[Walker]

Has anyone done this ? It seems to hender performance and improve fuel. But it seem it would help sence it is absent from the MP3 and the mazdaspeed. It only works on cold days to improve the heating up and lighting of the CAT. In normal operation it is an obstruction of the intake. I would like to see a dyno of before and after. Anyone??

For those who want to know what it is the VTCS is a variable tumble swirl valve control system. The valves shut off 2/4 of the incoming air at each cylinder and it tumbles the incoming air into the cyclinder on a cold day to create a rich condition and increase in heat so the CAT lights of quicker and It is the reason for the 2500-2800 Rattle in the intake.

 

[uclap5]

i believe one member did something to set it at open all the time, i cant remember how though somethign with a zip tie maybe? hehe

If you buy the mp3/ msp/ japanese intake manifold without the VTCS then you will need the ECU from the mp3 to not cause a CEL.

 

[cyomega]

Just get a turbo, you won't even notice the VTCS rattle...

 

[twilightprotege]

it can be removed fine, just dont diconnect the controler for it. you'll throw a cel

 

[P-Funk!]

...but what kind of performance improvement?

I don't need dyno - just butt-o-meter estimates...

Was It Worth The Effort?

 

[Little Beavis]

It is fairly easy to remove, but you have to remove the whole manifold first.

I have an "extra" manifold with the VCTS removed and ported and polished by perfworks that I would sell for $200 if you want an extra or what to do this. The combination of removal, port, and polished has been stated to have made big gains I ended up with two manifolds (talked to two different people about doing this). So, one is up for sale. It will help!

You will need to leave the solenoid there to make sure you don't throw a cell, but you can do this without changing your ECU!

 

[twilightprotege]

beavis, can you do me a favour with the spare manifold...take pictures of the lower half of it and confirm if the VICS runners only go to a chamber and in no way connect to the plenum???

 

[thewrench]

hey Beavis, I'll take that manifold, you have pm

James T

 

[Installshield 2]

Damn it James T...I wanted it...but you better buy it because it will just cause further debt for me...

 

[P-Funk!]

So.
'Is it Worth It'? I don't want to messa round with it for little/no improvement...

Thanks!

 

[twilightprotege]

let's just say race protege's were using ported STOCK intake manifolds up until recently...

 

[70]

beavis, can you do me a favour with the spare manifold...take pictures of the lower half of it and confirm if the VICS runners only go to a chamber and in no way connect to the plenum???

Still trying to figure this one out twilight?

 

[ELEmental59437]

It is the reason for the 2500-2800 Rattle in the intake.

Can you describe the rattle? latley I have been hearing a random rattle at that RPM but it sounds like its coming from behind the dash on the inside and only while in gear. If its the same sort of thing because of VTCS please let me know.

 

[twilightprotege]

stuttersc - well no body can help me. edwin just stops replying to threads when someone questions him, so i need to find someone who can take a picture of their IM and really look at it properly. i know that mine is like, but i need to confirm what everyone else has

 

[thewrench]

Once I get this intake from beavis I'll help you out twilight. I got a pm from him today, so I'm not sure how long it'll take to get it.

JT

 

[twilightprotege]

sweet!

hey i think once you get that IM, cams and cam gears, you'll prob have the most powerful na p5 out there!

 

[thewrench]

hehe, shhhhh, don't tell

 

[twilightprotege]

hehehe...i'll just have to spend more money now wont I!!!!

 

[thewrench]

Gawd, don't do that, my credit cards are high enough now, quad webers, yeesh!

 

[twilightprotege]

hehehehehehe...yeah that just an idea, mind you a very good but expensive idea...