How-To: VTCS Removal and Porting

[Kansei]

yeah I can't find any of the 4 pairs of vice grips I have..

 

[sephiroth]

All Protege's with the 2.0L FS-DE engine come with VTCS and VICS, except the MP3, which only had VICS. The 1.8L is still an unknown, and the 1.6L doesn't have even remotely the same manifold.

Japanese models of the FS engine don't have it, nor the ones in Australia, according to Twilight.

That's as far as I know. =)

pardon me if this has already been said.. I didn't take the time to read all 25pages of this wonderful thread. However, I can confirm as a 1.8L owner, that it has the exact same IM as the 2.0L, VTCS and VICS and all.

 

[iracemine]

cut them off with a pair of diagonal cutters. that way you will bea able to get the flaps of and then be able to get the rod off.

 

[mazdaspeedwerx]

by removing the vcts do you lose low end power? if it does then why do it?

 

[Kansei]

by removing the vcts do you lose low end power? if it does then why do it?

Why would you lose low end? the VTCS butterflies are only closed when the engine is cold, and when they are open they are a restriction in the flow at all RPMs. every bit of air has to go past the rod/butterflies.

 

[mazdaspeedwerx]

so no low end power is lost. thats cool. maybe I was thinking vics

 

[Kansei]

Yeah vics is the dual length runner system, those you definitely don't want to remove.

 

[mazdaspeedwerx]

thank God for people that pay attention in school

 

[Kansei]

thank God for people that pay attention in school

Wish I could.. most of my posts on these wonderful forums are posted while I should be doing something in class >_<

 

[Crazee D]

http://www.mazdas247.com/forum/attachment.php?attachmentid=98785
Pics of my porting

 

[i'm broke]

what's the power and driveability difference between this removal procedure and just buying one of the manifolds from protegegarage?

 

[Kansei]

what's the power and driveability difference between this removal procedure and just buying one of the manifolds from protegegarage?

I haven't seen any dyno tests from the protegegarage intake manifold on a non-turbo car but I would imagine it would be a power reduction. The protegegarage manifold is missing not only VTCS but VICS as well, and VICS is what gives us power down low (rpm-wise) as well as up high.

 

[i'm broke]

thx, kansei. now, would forced induction sway the decision either way? i don't have a turbo yet but i plan to in the future.

 

[PlatinumMSP]

you will get more power out of a 626 manifold on a turbo car than you will with just the vcts removal and porting

 

[i'm broke]

thx, platinum. my decision is made

 

[Black_Protege_5]

the 626 mani is not designed the same as the FS mani so like what Platinum said it would benefit turbo more. This removal is just to improve air flow but it make a huge diff. At the highend you feel a little but for those that don't know what you are doing don't try it. If you don't get it back on right you can have idling issues and other stuff.

 

[mazdaspeed777]

Subbing, will be doing this soon

 

[mazdaspeed777]

Could you guys reccomend a good dremel tool(brand, what kind) to get for this job?? Also could you port and pollish the throttle body? Would it make a difference??

 

[Black_Protege_5]

I used the cheapest dremel I can find from home depot and they have all the bits. Don't spend a lot on something you won't use very often.

 

[mazdaspeed777]

Yah I think I am going to get the a multi speed craftsman since I will be using it a lot. So has anyone done this to the throttle body??