ecko

iTrader: (57)

Today my a/c, air pump, and power steering was removed.I noticed that i lost alot of top end does that have to do with the air pump?or y is this happening?

87 t-66

iTrader: (133)

i think it has something to do with your 6 port actuators...not an NA guy though so i'm not sure.

Aaron Cake

iTrader: (1)

Without the air pump, the aux ports and VDI are no longer functional.

jjwalker

I had read something a while back about using the seat cushion inflaters from some luxury ford to pressurize the VDI and 6 port stuff. I don't remember the model of car though.

I do have an idea though. A buddy of mine bought those cheezy air horns at pep boys (LONG time agho, but I know you can still get them) and the air pump for those was wicked. I know for sure the air pump that comes with that kit would put enough pressure to open those actuators. It only takes 2-3 psi if that. I'd give that a shot.

Disclaimer: I have not actually tried this, but from experience, it would be a viable option for sure. The pump is for intermittent operation so who knows the durability when running all the time.

You could also use the LS1 electric air pump.

jackhild59

iTrader: (7)

There will be more trouble to come. How bout some cooling issues due to belt slippage.

Lets see: you can throw some money at electrically opening the 6p and the VDI.

Then: you can throw some money at double pulleys on the alternator or a yoohoo belt.

OR you could just maybe put the airpump and belt back on!!!!!

Geez, what is the deal with all these guys removing all these 'unnecessary parts' then discovering that your car is now f-ed up?

One of these days, you will sell this car and wonder why it is not worth anything.

iamxeddiex

iTrader: (1)

You did make a lot of sense... I have a 87 n/a, and I want to remove all those "unnecessary parts". I hear you don't even get hp, just a cleaner looking motor bay. What about gutting my cat from my n/a for short term before I can get a presilencer? Will that mess up my ports?

ecko

iTrader: (57)

well i did put the dual pulley on if that even changes anything.

cmanns

dont gut the damn cat, useless sigh

No need to remove air pump, you wont get any hp

It'd be better to get rid of the clutch fan, but that only helps with free revving mostly, and maybe 1hp which you wouldnt feel

and how is the air pump messing up your engine bay? A stock rx7 engine bay looks much cleaner then what idiots do to these cars ripping everything out that has a function.

dmolchanoff

well just to let everyone know i lost no power and gained power i ziptied my 5th and 6th port actuators open and all my airpump and OMP and ac is gone and ive gained a little but i also added an apexi spec gt exhaust...but zipties are good for actuator removal and yes my engine bay looks a hell of alot cleaner.....anyone got instructions on how to install yoohoo belt?

cmanns

lol thats retarded

You're butt dyno is not accurate, your 7 is more responsive due to the better breathing exhaust, the 5/6 DO make you loose power below 4k rpm when kept open

The airpump and such does not take more then a few hp away, what you're feeling is it's more free revving, switch to an electric fan, you'll be like zomg i gained 10000hp!

So silly

dmolchanoff

yea that is exactly what i said i got rid of my clutch fan and i was like holy **** i got 10000 hp now i can beat a bugatti NOT no im saying that it is useless ****...if u keep your airpump the only good its going to do you is if you somehow use it to open ur 5th and 6th ports yes...but if your actuators are so gummed up with **** that its hard for you to open them up using your own hands then there is a little problem...so i removed them yes i did notice a loss in the lower end but i really dont care when im launching it and staying above 3800 rpm in the first place wow everyone thinks they are soo awesome and everyone else is scumbags cuz we all think a air intake gives us 10000 hp right?

ecko

iTrader: (57)

so what im feeling is my 5th and 6th port actuators?

EvilWankel

iTrader: (2)

yeah, once you remove the air pump those no longer open. s4 uses backpressure from exhaust, but the s5 does not. Your ports stay closed.

freemanrx7

Yes! Also removing the air pump means your cat will clogg sone enough. Do yourself a favor and put the pump back on. Or find some way to make the VDI work and remove the cat.

ecko

iTrader: (57)

thanks

dmolchanoff

do your self a favor buy an exhaust system from say racing beat which has a pickup tube for the VDI actuation and your all set you got a little more power and your ports will open

Gringo Grande

iTrader: (97)

Something I've never thought to ask. On an S4...the RB system creates back pressure to open up the ports. On the S5, with emissions removed, is there any possible way that it can be used to do the same? I'm guessing no but figured I'd ask! =)

Aaron Cake

iTrader: (1)

The RB exhaust DOES NOT have a tube for the VDI. Only the aux ports.

The issue with a performance exhaust is that often they do not have enough backpressure to actuate the parts. So keeping the air pump is the easiest solution.

arghx

iTrader: (3)

if you have an s5 n/a, just leave the damn airpump on. I have run electronic 6 port systems and they are simply not as reliable as stock over the long haul. those airpumps from other applications were not meant to run continuously like that. they WILL fail eventually. Not only that, but if you ever get an Rtek 2.1 you can control the 6 port and VDI activation rpms.

it's just like removing your fast idle system (thermowax) and then being annoyed that your car idles like crap when it's cold...

AntonL

iTrader: (2)

ok sorry im kind of new to this and am having the same idea here, iv got an 85 GSLSE and im assuming thats what S4 is refering to. iv been wanting to run a straight pipe on mine for a while but didnt know how to get around that air tube and airpump. since mine is S4(im assuming) i should be able to just remove it all and connect the air pipe to my straight pipe and if i can get about 3 psi the system should work right? and the clutch fan you're refering to is just the fan for the radiator right?

RotaryRocket88

iTrader: (7)

An 85 GSLSE is a 1st gen Rx-7 or an S3. S4s are '86-'88 2nd gens. But, the 13b engine in the GSLSE is very similar to the one in an S4 non-turbo.

GSLSEs & S4s can remove the air pump with no consequence except that the water pump pulley can break free under high loads (double alt. pulley fixes it). It's only the S5 cars that use the air pump to supply pressure to the aux. port actuators.

But opening up the exhaust with a straight pipe does pose a problem. GSLSEs and S4s use exhaust backpressure to open the ports, so by freeing the exhaust up, there is generally no longer enough pressure to move the actuators. Ways to work around it can be Racing Beat's presilencer with a pick up tube, or to use an rpm switch, solenoid and air pump to open the ports similar to how S5s do it. I've never used the RB presilencer, so I can't comment on whether enough pressure is available, but it does have a "bent" design that may help produce it. I have used the rpm switch method, and I can say it works perfectly every time.

RandomHero

iTrader: (2)

Even if you get something to open up your aux. ports at the proper rpm there is still the need to rotate the other valve in the upper intake in proper timing with the aux. ports. So it can bounce the pressure waves back and forth and all that.

Should read up on the VDI system, its really pretty cool. N/A cars werent sold in Japan so they never had this. They only made them for export. Ironic because a variable intake system is still in use on the rx8.

also, if your car still has cats then you are doing them an extreme disservice leading to premature failure by depriving them of the split air from the pump. It helps them get hot.

barnett87rx7

iTrader: (1)

so if i put straight pipes on my s4 turbo will i loose power because of the lack of back pressure not opening the actuators?

RotaryRocket88

iTrader: (7)

Turbos have 4-port engines. You don't have any aux. ports.

squatches

so for an s4 it effects nothing when the pump is removed? slight bit confused