5th and 6th port mod
#1
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5th and 6th port mod
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???
#3
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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
#5
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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.
#6
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
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
#7
btw NGE = FTW!
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#8
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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.
#10
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.
#13
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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.
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.
#15
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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.
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.
#20
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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.
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.
#21
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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.
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.