kliftin

HOW DO YOU TAKE OUT THE 6P SLEEVES. THIER IN THE MANIFOLD RIGHT. PLEASE HELP. CAR IS SITTING BY A BAR AND NEED TO HURRY.

NathanRX7

I'm curious about this too. Why don't you move the car away from the bar. The auxillary ports not working should not make the car stop running. If it's not running you have another problem.

Dak

You have to remove the lower intake manifold and to get it off you have to remove the upper inatke manifold first.The sleeves are actually located in the front and rear housings.Once you get the manifolds off you should be able to pull the sleeves out and then you can reassemble.Not something you would probably want to undertake in the bar parking lot.You'll also need new gaskets to go between the manifolds and between the lower manifold and the engine.

kliftin

HEY, THE ENGINE HAS JUST BEEN REBUILT SO I THINK THE GASKETS OK. NO , THE CAR RUNS NEAR PERFECT BUT JUST WANTED TO TAKE OUT BECAUSE I TOOK THE AIR PUMP OUT. I PLAN ON BEING OVER 200 HP AND HEARD THE 5 AND 6 PORTS WERE RESTRICTIVE AS WELL AS THE MAF. MY PARK KICKED ME OUT LAST TIME I STARTED WORKING THIER. SO I MOVED IN FRONT OF BAR UNTIL DRUNK DRIVER HIT ME 4 NIGHT AGO. THEN I MOVED IT TO BEHIND THE BAR IN FRONT OF THE PLAZA AREA AND SOME GUY CAME TO ME AND SAID CANT PARK HERE. LIFE SUCKS.

Jahoo88

So to take the upper manifold off i neet to take the throttle body off and all the vacuum hoses? or can i leave that on? With basic tools, is it possible to do in 1 day? And how much power?

kliftin

****. al my crap just got erased. im going to make it short. ratchet socket screwdriver 12 mabey 14mm socket. no you dont need to take off the throttle body. top intake first then bottom. took me four hours first try. second 30 minutes. really easy. just do it.

dre_2ooo

ALTHOUGH removing the 6PI DOES yeild more top end HP....
You lose a substantial amount of low end torque (for burn-outs, cornering etc...). This is NOT cool. You need the toque to drive around town and for gas mileage . And the last thing an RX-7 needs is less torque.

BTW Have you ported your engine? Not to be pessamistic, but actually getting a NA to 200HP is quite a task....

IF you do remove the 6-ports, get a HP and torque booster. Apex'i makes one. Its a valve in the exhaust that allows 25-50% of exhaust gases to flow through until 4000 rpm's where it opens for a full exhaust, resulting in MORE low-end torque and more high end HP .

kliftin

woh. how much. Does anyone on this forum have one. that sounds like a good idea. so you can retain your low end but how the hell does it give you hp top end if its just opening the exahust. its already open.

mazdaspeed7

Have you ever driven a car that had the sleeves removed? Im not talking about not working, or wired open, but removed completely. You do not lose much low end from removing the sleeves, and you gain quite a bit of top end. When the sleeves are there, but wired or stuck open, they create a lot of turbulence, which hurts power everywhere. Once you remove them, you dont have the turbulence anymore, and therefore gain power everywhere.

You should know what youre talking about before you open your mouth and say stuff that isnt true. And if youre wondering, I have done that to my car.

200 bhp on a stock port engine(series 5 n/a) is not that hard to get. I have 210-215 bhp on my stock port 90 GTU.


Kliftin, did you remove the actuators/control rod too? You will need to make a cover plate, but cleans it up a bit more. The control rod wont be stocking in the middle of the intake runner, and it makes the outside look nicer.

RotaryMan88

Does any of this apply to an 86-88 rx7? All of you guys seem to have 89+s....
...I hate having my ports wired open, but leaving them to where they don't open at all sucks worse, so removing the sleeves, if I can, sounds like a better alternative...can I do this too?? And mazdaspeed7, do you have a pic or something of a cover plate?

kliftin

finaly. i have alot of questions for you mazdaspeed7. First dont go so hard on that guy. I called a ton of people rx7.com. mazdatrix and apexi. they said dont do it and its dangerous because you run lean afterwords with sleeves removed. I said i have a t11 fuel pump but he said wasnt enough. I think knowone in this world knows what thier talking about except for the people who have done this. my car is same as yours as far as actuation. I havnt touched anything yet but intake is off and wanted to do this because of your post. yes I will take out those actuators to and block off the acv becasue I took out the air pump. basically I wanted my engin bay to look like yours but everyone is telling me not to. Rx7.com asked how i was going to get 200hp out of an na, like skeptically. anyways im going to look at your engin bay agian somewere in the forum. I took out my ps and have ud pulley to intall as well. Im trying to go all out.

Mazdaspeed7.
another question- those relays. you know the colorful ones next to the power steering. thiers five. I wanted to take out them with the metal lines and hoses connected but dont know if it will mess up the computer. one meckanic says it will another says it wont. what the hell. can you tell me how you took your emissions off. Cant get a definate ansewer. I would apreciate it greatly if you could help. THNX.

kliftin

wil I know what the controll rod looks like when I see it. So just take everything out like those big bulging actuators next to acv.?

SpeedRacer

Mazdaspeed7 - what did you use for coverplates?

Jahoo88

Ok, heres another question for you guys who did this.

With the sleeves out is there any chance of an intake leak? Im thinking if the cover plates would be off is there a hole to the intake tract?

I havent taken it apart yet, hevent seen pics so i got no clue how it works.

dre_2ooo

Um.. my ports were STUCK OPEN for the longest while and then wehn i got them working again, i got LLOTS more toque! So i just assumed that it was the same effect...

I saw the exhaust valve on my friends 924. It was in hte straight pipe that we replaced his cat with . Looks kinda like an IRIS of a camera lens.... sweet ****! He said he got it from APEX'i. and he can do burnouts from a ROLL now! (RX-7 probably couldn't) But it'll still give you more power in all bands....

mazdaspeed7

OK, I made the coverplates out of an aluminum bar 1/8" thick, and grinded it into the shape of the actuators where they bolt onto the intake manifold. Not hard at all, just make sure you use a gasket and gasket sealer when you bolt the coverplates on or you will have a vacuum leak.

Kliftin, you will see the control rods when you remove the sleeves. It is just the rods that go through the intake manifold to turn the sleeves. You have to tap them out with a hammer and punch most likely, but sometimes they just slide out. You have to have the actuator off, and tap them out from the engine side of the manifold.


As you the solenoids, I was in a weird situation. When I had my 89(now wrecked), I removed all of the solenoids, and didnt have any problems with the ecu. Same with the ACV solenoids. That engine was rebuilt 3K miles before I totaled my 89, so I bought the 90 that I have now, and put the rebuilt engine in it. I also put the engine wiring harness and ecu from my 89 into the 90(the 90 harness had a lot of bad wires). I started the car, and I got 7 codes. It was the 5 solenoids on the rack, and the 2 from the ACV. Its weird because it didnt set off any codes on my 89, but did in my 90. The configurationw as exactly the same in both cars. Heres how I fixed it: cut off the connectors for the 5 solenoids, and wired a 47 ohm resistor in place of the connector on each one. Make sure you get the biggest resistors you car. I have 1 watt resistors, and they are getting so hot, theyre melting the electrical tape on them. As for the ACV solenoids, they are small, ao I just pulled them off the ACV, plugged them in, and taped then to the harness.

The n/a fuel system is goor for about 190 bhp or so, period. It doesnt matter how you get 190 bhp, but you will start running into fuel problems above that. I have a TII fuel pump, and 550 cc secondaries, and Im still running quite lean. With 460 cc in the secondaries, I couldnt rev past 6K with all my mods. Now, it depends on the weather. If its cool outside, I have a lot more midrange, but power falls off sooner b/c my car leans out sooner. 100 degrees outside, and I can rev freely up to 8400, but thats about it. Im still looking for another pair of 550 cc injectors. I got a pair thday, but theyre from an 87-88 TII, and wont work on my car.

Kliftin, check your PM's.

deggial

Does anyone have actual dyno numbers to prove any of these claims?

I have my 6pi removed and I can`t say if they have improved or degraded the powerband.

Green

mazdaspeed7 do you have dyno sheets of yer 200+ hp on stock ports? I want yer car!

Kliftin make sure ya know what yer doing before ya start taking that stuff off... and for gods sake don't drop a bolt into the intake holes! bolts don't lubricate apex seals as good as oil does..

"What can I do to my car to make it faster now! haha .. haha.. HAHAHAHHA wow! look at those apex seals fly!! This new exhaust gets GREAT distance! haha hahaha hahahaha.."

ugh! =(

mazdaspeed7

No dyno sheets yet, but once I get a job, I will have some up. Ill also probably have a few more mods by then.

Ill be racing a stock, auto 93 touring pretty soon. I think Im going to win, and Ill defintely have a vid of that for all the non-believers here.

Suparslinc

This was something I contemplated when I found out my aux. ports where stuck.
I went ahead with the manifold removal, but instead of taking the sleeves out I just cleaned them and greased them. They work much better now. I have heard of people running into problems when removing the sleeves; exactly what kind of problems I'm not sure.
Leave them in. The car was designed that way. If it was all to gain and nothing to lose by not having them, Mazda would have sold the car that way instead of adding the extra junk.

deggial

I`m inclined to agree with Suparslinc.But then the 6pi is also needed for better emissions and gas milage.So there has to be a trade-off somewhere.

I have a few more autocross events to go to and more low-end would definitely be an asset.

kliftin

alright sounds easy. Another question was what do I do with the three hoses coming out of the power steering. can I take those out. they seem to be connected to the axle.

mazdaspeed7

Heres my thoughts on removing the sleeves. On a nearly stock engine, the gains are minimal, and you probably lose some drivability, gas mileage, and all the other boring things for minimal gains in hp. Once the mods start stacking up, though, the sleeves start to become one of the biggest restrictions. You will find that most of the people with ported n/a's with a lot of mods have removed them. This is because the gains are much more on an engine the flows much more air than stock, and the losses are minimal.

It all comes down to your mods and your preferences. The more mods you have, the better removing the sleeves will be for you.

deggial

so when is the crossover point? If you have done everything else to improve airflow, then remove the 6pi system?
(This was the next logical question, someone was going to ask it)


Use me as an example.

Cone filter, no cats, catback,exhaust porting (actually turbo rotor housings), Would there be any useful gain in removing the sleeves?

mazdaspeed7

Kinda hard to say, but I think it would help you some. It has a lot to do with personal preference. You might like it better without, or you might not. I would try it, but just pull the sleeved out, and leave the other stuff until you decide if you want to keep it that way or not. You would probably notice the powerband being smoother, especially where the transition was from closed to open, and a little midrange and top end, with your car revving a little higher that before before power starts to fall off.