Do I Need my Air Pump
11-29-04, 08:27 AM
#2
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yes, however...
The 6-ports on an S4 N/A (86-88) are operated by backpressure from your cat. an the cat needs the air pump to survive. So, if you ditch your air pump, then your cat will brake, and your 6-ports wont work.
if you dont know what 6-ports are - do a search as that topic has been discussed more that Paris Hilton's legs.
-a
The 6-ports on an S4 N/A (86-88) are operated by backpressure from your cat. an the cat needs the air pump to survive. So, if you ditch your air pump, then your cat will brake, and your 6-ports wont work.
if you dont know what 6-ports are - do a search as that topic has been discussed more that Paris Hilton's legs.
-a
Last edited by sunshine; 11-29-04 at 08:30 AM.
11-29-04, 09:43 AM
#3
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This is true but if you ditch the cat for a more... useful option 
then you don't need to worry about that either.
Now the question I have is where the backpressure is coming from. Is it something in the manifold or is it from the split air pipe?
then you don't need to worry about that either.Now the question I have is where the backpressure is coming from. Is it something in the manifold or is it from the split air pipe?
11-29-04, 10:49 AM
#6
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What size is the belt that goes from your water pump to crank shaft? I heard that you can fit it on there if you remove your air pump instead of using the dual pulley for your alternator. Someone here was saying that in order to get it off after, you'll need to cut it, cause you pretty much pry it onto the belts in the first place.
11-29-04, 01:36 PM
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Originally Posted by sunshine
yes, however...
The 6-ports on an S4 N/A (86-88) are operated by backpressure from your cat. an the cat needs the air pump to survive. So, if you ditch your air pump, then your cat will brake, and your 6-ports wont work.
if you dont know what 6-ports are - do a search as that topic has been discussed more that Paris Hilton's legs.
-a
The 6-ports on an S4 N/A (86-88) are operated by backpressure from your cat. an the cat needs the air pump to survive. So, if you ditch your air pump, then your cat will brake, and your 6-ports wont work.
if you dont know what 6-ports are - do a search as that topic has been discussed more that Paris Hilton's legs.
-a
just wondering because I was going to remove my airpump and cat this week
Last edited by CompuBob; 11-29-04 at 01:39 PM.
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11-29-04, 07:48 PM
#9
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Originally Posted by Aaron Cake
They don't.
hehe, ok then I guess we just figured out his problem :P
11-29-04, 09:51 PM
#12
you can replace the cat with a straight pipe. just tap into your air pump to acv hose and run your 5th and 6th ports off of that pressure. there are write ups on doing this and you should be able to do it relatively effectively with some basic tools and parts. i recommend making a T fitting instead of just drilling into the hose like the write ups say though. also, aquairum valves don't usually have enough flow to work properly.
https://www.rx7club.com/2nd-gen-archive-72/how-air-pump-auxilary-port-activation-330310/
https://www.rx7club.com/2nd-gen-archive-72/how-air-pump-auxilary-port-activation-330310/
11-30-04, 08:16 AM
#13
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Originally Posted by 1RevvinFC3S
Er, I guess I shouldn't replace my cat with a straight through test pipe if I want to maintain functionality of my 5th and 6th ports. DAMN!
PEOPLE!
The 6 ports on S4's and S5 are activated differently. S4's use back pressure from teh exhaust. S5's use the airpump. That means on an S5 you can tamper with teh exhaust without any 6-port reprucussions. On a S4, if you open up the exhaust, then the 6 ports will not activate unless you provide for their functionality in another way.
-a
Last edited by sunshine; 11-30-04 at 08:18 AM.
11-30-04, 09:11 AM
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Originally Posted by bigturbo
does this also apply to turbos?? I have a full 3 inch exhaust on the way with no cat turbo back on a 87 (s4). Will i need to change anything??
11-30-04, 07:22 PM
#16
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Originally Posted by sunshine
Your sig says you have an S5. Your 6 ports are activated by the air pump. You can run a straight-thru exhaust without problems. You just need to keep the air pump and ACV.
PEOPLE!
The 6 ports on S4's and S5 are activated differently. S4's use back pressure from teh exhaust. S5's use the airpump. That means on an S5 you can tamper with teh exhaust without any 6-port reprucussions. On a S4, if you open up the exhaust, then the 6 ports will not activate unless you provide for their functionality in another way.
-a
PEOPLE!
The 6 ports on S4's and S5 are activated differently. S4's use back pressure from teh exhaust. S5's use the airpump. That means on an S5 you can tamper with teh exhaust without any 6-port reprucussions. On a S4, if you open up the exhaust, then the 6 ports will not activate unless you provide for their functionality in another way.
-a
... The neighbors'll love me.
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