i have a s4 n/a. i already removed power steering, ac, air pump, stock intake, and a bunch of emmisions. I was told that there is a mod to make my 5th and 6th port stay open. Is that possible and if so how???

 

You can wire the ports open, but I wouldn't recommend it. Theres write ups on it here, just have to search.

 

like he said tie them open you get no bottom end but top end power. what you can do is they sell the valve or you probably can do it, where it's contour to flow better. i think pineapple racing sells them. but if you want to do it just get some epoxy and contour the inner part of the valve like the one they sell. hope that helps

 

thanks to the both of you.

 

Err, i have my 5th and 6th ports wired open and it totally kills your low end, if you're looking for a daily driver, do not do this. Also, it does nothing for your high end either so you really shouldnt even bother.

 

yes i would highly recommend that mod as you no longer have functional aux ports and so they stay closed which really kills top end it may kill low end but with the contour mod that should help alleviate the problem substantially. i remember the difference with and without functional aux ports and it was a night and day difference especially up top.
pineapple racing quotes a 8hp increase and some one many years ago on this forum quoted a 2%-3% increase in airflow from their safc when adding the contours. good luck.

p.s. heres a nice video of their product
http://www.rebuildingrotaryengines.c...6_Port_Inserts

 

im sorry but i'd have to disagree that it does nothing to top end.and if u have an s5, do you also have ur VDI wired open? that would help top end also if they are non functioning on ur car.


btw NGE = FTW!

 

They're supposed to be open in the top half of the rev range, so wiring them open will make no difference to top end compared to a properly working system. If they're not opening the system should be fixed so that they do.

 

Yeah, you're not going to GAIN any top end. Those ports are to help out the low end torque(or lack of) the rotary has. Not to increase the top rpm power.

 

well i was under the impression that since he removed his air pump they'd be non functional and closed. therefore he could wire them open and have more top end than having them permanently closed. i didnt mean for it to sound like i said they'd be better than a functioning system but that they'd be better than a non functioning system.

 

Gotcha.
For your city driving you probly could leave 'em closed and never know. But if you're really driving it you'll certsinly be missing out on the highend goodness!

 

The air pump has nothing to do with 6PI actuation on S4's.

 

I am sure you would lose low end, but I still manage a 14.2 with them open/gone on a S4.

I daily drive my RX7.

I think my engine with the ported intake manifolds and custom exhaust header/system makes the engine sound exactly like a big SP engine..just my .02 cents.

 

Gus24 leave your auxiliary ports alone unless you're making a dedicated track car.
If you drive around town with wired open ports you will have your *** handed to you constantly by GEO's and Hyundai's

 

As it's been said, S4's do not use the Air Pump for the 6PI system. They use backpressure from the exhaust coming through the split air pipe from the cat, and to a tiny pipe that tees off from it.

The S5's use air pressure from the air pump and are controlled by a solenoid valve which gets its signal from the S5 computer.

Since your car is an S4, you have a few choices...if your exhaust is stock or provides enough backpressure use the stock system. If not, you'll have to go to electronic activation (essentially a rpm switch and an air compressor plus some minor stuff). The third option is to put the air pump back and use a valve (for control and dump) and tee and adjust so the actuators open the valves at the right pressure.

Key thing to remember: Make sure the actuators are sealing well (hold pressure) and aren't seized, and that the rod going to the auxiliary valves and the valves itselves turn freely.

How do I know all of this? I'm in the same boat and I'm finally going to fix it this winter. I'm going with a modified option three, but keeping the air control valve because I have the air pump, ACV, and cat on the car. I'll be tapping and threading an air nipple for the 6PI to the small area on the ACV near where the air from the air pump enters.

The archive has detailed write-ups of electronic and air pump activation for the 6PI system.

 

I think our OP's aux ports are working fine, he just wants to wire them open permanently for some reason

 

if my 5th and 6th ports are ported should i take them out. there is mild slack with the inserts.

 

I don't know you might want to get the 6th port inserts.

 

The 6PI system has zero effect on quarter mile time, since the engine spends almost the entire run in the top half of the rev range where the ports should always be open.

 

5th and 6th port "mod" yields no increase in performance. People believe this because the system is not working in the first place, therefore the secondary ports never open, so when somebody wires the ports open, you gain top end, but u lose bottom end.

People need to just make the ports work properly so one yeilds the benefits of having both "bottom end and top end" power, or in other words, stock power.

 

Finally, someone talking sense.

 

Yeah, if they're open when the RPMs get up anyways, what difference would wiring them open do?

 

Yeah, it's like a coat hanger going from one to the other. Dude, it totally kills the RPM man. This is why I bought another intake manifold and a ACV.

 

That comment makes no sense at all...

 

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