canonize-ryda

when i took off my air pump i put on a mini air filter on the hose going to the engine so in case it sucks air it doesnt get dirty, anyways it looks cool but should i just block it off, i mean i have totally no emissions on my car so the mainly what im looking at right now, easy enough block off or not? thanks

oakback

What year is the car? And do you have a catalytic converter?

canonize-ryda

86 na and no cat has intake and cat delete full exhuast minus headers

oakback

Rip that **** out. You can also remove the airpump muffler thingie, it's a kind of a pain, though.

canonize-ryda

well simplt enough do i need a block off plate where the air pump once connected to the engine

HAILERS2

Called getting a hacksaw, drill with bit, flat metal plate approx 1/8" thick and a half hour to 45 minutes. Done. Metal plate at HomeDepot. Throw in a magic marker to the list. Opps. some gasket making material or RTV used sparingly on the mating surface.

RotaryEvolution

iTrader: (30)

or put it all back in so the car runs faster, since it all had practical purpose.

RotaryRocket88

iTrader: (7)

If you remove the air pump you're also going to need a double sheave alternator pulley or "yoohoo belt" to prevent the water pump pulley from slipping.

oakback

If he has no cat and no emissions, how is his air pump making his car run faster?

canonize-ryda

o wow im way past putting it back its shot and was out maybe a year ago ive had a mini filter on it for some time now just to keep dirty air out of it, i do have a double pulley alt and i know all of this.... i have full exhuast cold air intake and no emissions, air pump was never hooked up even when i bought it, i just simply want a striaght answer... do i need a block off plate there or not.... is the mini filter okay.... ez enough thanks

3vil

iTrader: (4)

i'm a bit confused. did you pull off the ACV as well, or just the air pump?

RotaryEvolution

iTrader: (30)

inoperative 5/6th ports?

cold start warmup assist?

smooth idle?


anyone help me out?
i see far too many people gutting the non turbo cars, all for nothing. they actually generally ran better before ripping everything out and didn't smell like a gas station. this isn't a honda forum.

remove the smog pump and make a block off plate for the ACV, you can't leave it open without a plate or you'll have a vacuum leak. if you also don't already have it done, wire open the 5/6th ports.

Innovation

iTrader: (1)

Like Karack said you will have a loss of power and idle issues. My pump seized and I removed it and did notice a reduction in power. I wired open the 5/6th ports but it just wasn't the same.

scathcart

Auxilary ports are actuated by exhaust backpressure on S4 cars, not the air pump.
Idle and warm-up are completely fine with the thermowax and BAC valve in place; removing the emissions equipment shouldnt affect either.

RotaryEvolution

iTrader: (30)

removing the smog pump= replacement cats once a year.

exhaust back pressure requires a catalyst, even if it is a high flow one on an S4. the pre-cat is not a requirement so i junk it first before anything. simply removing the precat you'll notice an improvement in performance. removing everything usually results in losses somewhere that hurt performance and drivability. people who yank emissions almost always yank everything else along with it, because people are dumb. taking weight savings and simplification far too seriously.

oakback

My statement was based on his no-cat, no-emissions status. If he's keeping it that way, then air pump is useless, amirite?

RotaryRocket88

iTrader: (7)

Without a cat, yes the air pump is pretty much useless. The potential performance problem comes from having a gutted exhaust system that likely will not produce enough back pressure for the aux. port actuators. Personally I prefer to keep the air pump, and use an RPM switch setup to keep the aux. port actuators functional: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/activating-aux-ports-vdi-rpm-switches-907824/.

If you're talking about having a filter on the inlet to the ACV, you could just stick a rubber plug in it. Nothing will go into the ACV if the air pump is gone.

RotaryEvolution

iTrader: (30)

yes, an electrical or mechanical port actuator system is a workaround. one which i almost never see done. more rather just about everyone who sais they removed emissions who shows me their car has basically nothing left on the motor at all to control the variable fuel pressure system or the auxiliary ports.

all of that results on loss of power, not an increase. so that said, all the work to simplify the car and improve air going in and out was wasted time.

RotaryRocket88

iTrader: (7)

Yep. "Emissions removal" usually means the person will rip out anything they don't think they need. Even if it has a non-emissions purpose. The BAC, thermowax or the air pump on an S5 NA are typical examples.

canonize-ryda

k my car came race piped with no cat, airpump on car not running or hooked up, so i removed it, i have wired my 5th and 6th ports to open at 4k at 4 clinder since it dont set for rotary, i have no idle issues, no warm colds start issues just asking if i need to block off the opening to the engine where the airpump once hooked in, and as far as acv i dont know where it is located but if its arounf the air intake box or the airpump it may be removed. im not entirly shutre what the acv looks like, but im not having many issues just seeing if it nneds blocked or not, ive done it block and filtered and both ways are comparibly the same... only issue at this point is it dies like 5 times before it stays running, other than that and it going up to 1500 rpm everyonce and a while (i also have to replace a vac solenoid since the filter part broke off and i super glued it shut thinking it wasnt a filter on it)

scathcart

That's not true.
Proper placement of the pick-up tube for the exhuast will allow the auxilary ports to open without a Catalytic convertor.
Example vehicle:
86 N/A, borla catback, stock exhaust manifold, 2.5" stainless downpipe, cone filter. Auxilary ports open under load at 4400 rpm. Verified with grease on the actuators, and by video.
Example 2:
Racing beats presilencer for the s4 n/a bolts to the stock pick up tube and allows the auxilary ports to open.

canonize-ryda

so block off plate or not? i still havent gotten a straight answer, ive been told not too go that far and how to make block off plates but do i need one on my hose into the engine that once connected the air pump. thanks

RotaryEvolution

iTrader: (30)

if it's not functional i would get a block off plate and omit the ACV to clean up the engine bay. without the smog pump it's not doing anything being there. you can get block off plates at mazdatrix.com

http://mazdatrix.com/c-5.htm

half way down the page.

canonize-ryda

but it was unclear more like a sugeecstion. but okay thanks