I have an 86 Mazda rx7. The cats are removed and as far i know the 6th port actutors run off the main can well if its removed what would it run off of

 

they run off back pressure. open and close depending on pressure. if they dont open your on 4 ports if they do open your running on 6.

 

theres a pick up tube coming from the exhuast to the actuators. you can simply wire them open if you do not have enough back pressure as many people do. do a search on it

 

will it better if i jus wired them open. and would the power go down if i only ran it off 4 ports

 

what would i reseach. sorry im new to this stuff ive working on my car since befor x-mas and have good plans for it i just need a little help sometimes thanks

 

the quik and easy fix is to wire them open. u might get a little less MPG and less power down in the lower RPM range but thats the only down sides

 

you would have less power if they were only 4 ports. it wouldnt be bad down low but in the high rpm range you would feel a difference

 

thanks i just got it running today and. i put a crap load of wd40 in the engine when it was out of the car. to loosen up the engine and now its smoking a bunch. and its been running for bout 20 min. now. could it be the wd40 still smoking or what could it be. the engine has been sitting for bout 2 years befor i got it.

 

where did you put wd-40?

 

dont wire them open. if they are not working fix it. wiring them open is bad. there are other alteratives.
http://www.rotaryresurrection.com/2n...elec6port.html if you dont want to use the exhaust pressure this will work

 

how is wiring them open bad? it might not be the BEST solution. but it is in no way "bad" by any means.

 

When I replaced my cat I had to use WD40 to free a nut, and it smoked for 10-12 minutes. If you used a ton, it will probably go for longer (and smell like all horrible hell ), if it sounds good I'd let it go and see.

 

ya i put it in the engine to loosen it up. and everything sounds great exept the idle proublem

 

Wiring the ports open is not a good solution. Your performance will suffer.
You can get a high flow cat with an air pipe for exactly this issue. The Racing Beat cat comes to mind. Then you can get the performance of a free flowing exhaust, still meet emissions, and have use of your aux ports.

 

i thought bout using the electric port idea at rotary resurrection

 

so here's a nice summary for you.

-wiring them open will hurt your bottom end power, but won't ruin the engine
-electric port opening is a good alternative that is cheap, but more technically complicated
-racing beat does offer a cat replacement pipe/presilencer combo that has a backpressure tube that will allow your ports to operate correctly. This is very easy, but costs significantly more.

 

thanks for the help im going to wire them open for now but then i will ether get a cat or the electric port which ever happens first. i will most likely get the cat when i get my exuast done

 

but than again, i rarely drive below 3k rpms and want to know for sure my ports are fully open.

 

well i kinda got another proublem that just happened. there is oil in the exhaust and a pretty good amount of it. i went through bout a quart. is it the oil seal and is it time for a rebuild. and im going to try to put some luckaus oil in today and see if it stops the smoke and everything. but im jus going to wire the ports open for now because like rx7 all night said im not going to be really driving under 3000 rpms that much

 

If you are actually getting oil in the exhaust and going through that much, there is no cure but to rebuild the engine.

 

thats gay ok i want to rebuild it but how much do you think its going to cost.

 

I in the same process here. Since I'm replacing me header with RB Roadrace, I wont have the back pressure for the actuators. So I'm leaning towards a manual boost controller, connected on the air pump.

 

how would that work? im thinking bout wire them open and see what happens. then come try to hook it up to my air pump but dont know how i would do that. i found a vacuum line on the intake manifold and im going to try to hook it up there and see if there is enouph back pressure for the actuators

 

Pretty simple, most turbo guys knows how! On the air pump hose install a T inline with a 1/8 outlet for the manual boost controller. Connect the output of the MBC into the actuators, then set the controller on a certain PSI @ 3600 RPM which is partially open and wide open beyond.

 

sounds simple thanks