rotoboy20

well, i wanna take all of the emmisions crap off. i just dunno what i can and what i cant take off. i know i can take off the air pump and ACV and the cats, but what other things need to come off? i have a budget of $0, so i really cant buy the RB replacement pipes to delet the cats. can i leave 'em and remove all of the other ****?

if someone has the patients, i need some proceedures. the forum search will not work for me.

YearsOfDecay

my advice is to save your money and do it right,, or what you are going to end up with is a basket case seven that will end up in a junk yard.

If you remove the airmpump and leave the cat on, the cat will clog up real quick wihtout the extra air to burn off the unspent hydrocarbons.

Or profile says that your car is an s-4 (86-88)

on s-4's, if you remove the cats, you will have to find an altenate way to operate the six ports because they work off backpressure from the exhaust. Some guys use a solenoid and an RPM switch to operate the 6ports after removing the cats on an 86-88.

any way you do it, its gonna cost some money... about 200 or so...

rotoboy20

well in that case ill save for the cat replacement pipe from Racing Beat. it has a thingy to operate the 6port. but what else has to be done? do i need any block off plates? i need some direction, i just dont wanna **** anything up too bad!

ddub

you can gut ur cats

and with taking stuff off you need blockoff plates... things to take off airpump (no blockoff plate), acv (needs one), egr valve (needs one), split air pipe (needs a split air blockoff plate), you CAN take off your bac if you want but thats more for idle really but if you do you'll need a blockoff plate for that too..

I dunno if im missing anything or not but thats what i remember

rotoboy20

i found a write up in the archive. yay! i still have a few questions.

will removing the emissions components make afterburn worse?

is there a possibility of flames out the tail pipes?

will my car run better at idle?

also, if i remove the EGR system, will that reduce the chance of carbon lock?

one more EGR question.

i know that exhaust gasses are recirculated to cool the combustion chambers, if removed, is there a chance of ****** up the engine? detonation, rotor warp, seal damage...ect...

thanx
-chris

andrew lohaus

yes pulling emmsions will increase afterburn and without cats you are practicaly gauranteed flames.

believe it or nat the car will idle quite nicely at idle without emissions or even the bac.

rotoboy20

the way it runs now is kinda makin me think twice bout removing all that, cause it afterburns at idle. are you telling me that the idle will smoot out and run better if i do this? what about the EGR, any thoughts? i just want this thing to run smoother for longer with out having to **** with some stupid EGR valve or a dumb *** ACV!

thanx andrew, good to know.
-chris

rotoboy20

any thoughts.....anyone?
-chris

AusTexRex

will your car start without an EGR blockoff plate?

Aaron Cake

iTrader: (1)

Yes.

Yes.

Depends. If you remove the BAC valve, the car can no longer regulat it's own idle. So you either need to set it high, or use your right foot as the idle regulator. Or remove all accessories so there won't be a load on the engine at idle.

No. Carbon lock is very rare. Don't worry about it.

Nope. In fact, the newer engines don't even have an EGR valve. It's not necessary in a rotary.

Just a side note: unless you have a specific reason to do so, don't remove your emissions systems. The car won't run better, and you won't gain any power either (in fact, you'll probably loose a few HP). The only exception is the cat, but you can buy a high-flow replacement which is both free flow and emissions friendly.

Bigretardhead

I agree with Aaron. unless you're really trying to make your car a lot faster, and planning on racing it all the time or something, don't remove emissions. its just polluting our environment for not a very good cause. just get a hi flow cat, and be done with it. if you really want to save some weight or something, remove accesories, replace heavy parts with lighter units, strip interior, etc... if it works fine, don't mess with it.

rotoboy20

hmm. very good point. so if i decide not to rip all that **** off i guess that rules out the possibility of geting one of those racing beat headers.

i can run just one hi flow cat and still have enough back pressure to accuate the 6 ports, correct?

Aaron Cake

iTrader: (1)

If you get the RB header, you might as well do the emissions removal (leave the BAC valve in tact) since it basically defeats the emissions system. Once you block off the ACV, you're 90% there as far as a dead emissions system.

Yes, one high flow cat will still open the ports.

andrew lohaus

yeah i kinda see the bac as a take it or leave it kind thing. i have mine off, but also i dont have PS and rearely run the a/c. right now i have the idle set so that with nothing on, no load, it will idle at 900. then when i turn everything i can on (highbeams, stereo, run the windows up and down, defroster, blower,etc) it still only dips to 800. having PS mihgt make a significant difference tho since you tend to need the most assit when you are sitting still and idling. it probobly wouldnt stall the car, but could realy bog it.

if you havent done the tb mod yet. i say leav it because of the coolant throught the TB. however if you have dont the tb mod its a lot cleaner and easier to just run a coolant line from the water pump neck, right under the UIM to the nipple on the rear housing.