88convert

I read the post in the archive about removing the emissions stuff, but it seems like everything is centered around the removal of the air pump. can I just take it off, or will it **** with my engine? if not, what can I get rid of? I have a completely stock 88 convertable non turbo. I wanna get rid of everything I don't need, without having to premix or anything.

ddub

If you remove the airpump and leave in the cats, they'll clog, and you'll have to plug the ACV.

Everything you can remove, air pump, main cat, gut precats, ACV, EGR, vac rack/solenoids. There's more stuff in the engine bay that can go, but those are the major emissions things.

powrdby13B

ac and ps? thats a lot of weight too

vice

whats is the vac rack/soolenoids? what do they do?

ddub

It is the vacuum rack underneath the UIM that directs vacuum feeds to various things. The solenoids are for switching vacuum I believe like to the ACV and other stuff. You can get rid of all of it once you remove emissions, just have to reroute the vac lines that are left over and you'll have to put in new fuel hose in place of the hard lines on the vac rack.

powrdby13B

oh holy **** for real? that kicks ***! so... not to hijack the thread... if this dude takes out his air pump can he take that stupid *** vac rack out? and what are thows four things that have wires connecting to them (they look like some sort of vac solenoid) on the driver's side right under the throttle body and dynamic chamber?

88convert

I live in south carlina, and we don't have emissions here. if I gut the cat, won't that hurt my backpressure? or do I not need a lot of back pressure? what do I need to keep from the vacum spider that's under the UIM? I know I want to keep the oil injectors (I think that's what they're called) and what size hose would I need to run a new one? also, where the hell is my fuel filter? I've had this car maybe 2 months, and I wanna really tear into it now.

Isn't the ACV valve located near the exhaust manifold? also, if I gut the precat's and junk the main cat, isn't that the same as putting in a piece of pipe and completely removing them all together?

ddub

Once all emissions is removed theres no reason to have the vac rack anymore really. The things you are referring to are the solenoids that switch vacuum for things like the ACV.

There is a how-to in the thread IIRC about removing the vac rack and all emissions.

88convert

Iirc?

Impreza2RX7

IIRC is if I remember correctly.. But some headers, a midpipe and a catback and ditch all of the vacuum stuff.. If you want your 6 ports to work, you'll have to keep the airpump, open them electronically, or just use sleeves or wire them open. Ditching the AC and PS will save quite a bit of weight, but I wish I didnt ditch either personally..

ddub

There are people that run gutted cats with enough back pressure still

Really you don't NEED to keep any of it, just reroute your vac lines and put in fuel hose in place of the hardlines on the vac rack.

I'm pretty sure you can still keep the oil injectors while removing the vac rack, don't quote me though I removed my MOP system at the same time.

Fuel filter is on the driver side of the engine bay down at the bottom by the firewall.

The ACV is on the LIM behind the air pump.

Yes you can put in an aftermarket downpipe or header (for n/a) that replaces the precat and then you can put in a straight pipe in place of the main cat.

Impreza2RX7

You can still keep the OMP, none of this affects it. I wouldn't run a gutted cat, I'd just replace it with a test pipe..

88convert

so I can remove the air pump, ACV valve, and all the vacuum ****, but I'd need to find a way to keep my 6 ports open? what are sleeves and where can I get them? also, I wan to completely remove my exhaust up to the manifold and replace it with piping, can I do that? also, if I remove the air pump, the ACV valve has to go right? where can I get the block off plates for everything I remove?

Impreza2RX7

I dont know where people get block off plates now, I bought mine from K2RD. Pineapple racing has the 6 port sleeves, and the ACV comes out with the airpump. After that you can buy headers and a exhaust, make an exhaust that bolts up to the header, etc..

dr.jones63

I thought that taking the air pump off a N/A defeated the 6th port activation ?

read this
http://www.teamfc3s.org/forum/showth...ight=actuators

DerangedHermit

Depends on what car. The S4 opens the 5th/6th ports off backpressure from the exhaust. The S5 uses the airpump.

pontious

Yeah, you can keep the MOP lines without the vac rack...

88convert

thanks for the help, I'm glad to know that I will be able to remove my air pump and ACV valve without giving my sixports hell.

oakback

I have an s4 n/a. I have the RB header, presilencer, 2.5" pipe to a 2.5" Magnaflow straight-through muffler. I have my 6-port backpressure tube connected right after the header collects, before the presilencer. My aux. ports open fine, despite the decreased backpressure (it doesn't take much). (no a/c, never had p/s, airpump gone, rat's nest gone, acv gone...have yet to get b.o.p. for EGR, pineapple inserts installed)

pontious

If you remove your airpump you will want to get a dual belt pulley or a second belt to keep you belt from slipping.

BTW, if your AUX ports don't open by back pressure for whatever reason (mine didn't) there are several way to make them work either via the airpump or electronically.

I did the former and it works very well, and was cheap..

88convert

I removed my ACV and air pump, and the car seems to be a little more peppier, idk why. I'll be removing the vac rack this weekend, anything else I should know before doing this?

Lodivigo

Ask and ye shall recieve...

https://www.rx7club.com/2nd-gen-archive-72/emissions-equipment-what-you-can-remove-how-112251/

Edit: My bad, I read the title and posted...there are a lot of ways to get around the air pump, you'll find a way

dorifc3s

how do i remove the ACV and does this even affect the performance? pics?

white drifter

I don't have the cats on mine and I still passed emissions

Cosmo_TT

iTrader: (11)

nice must run pretty clean