RotorJoe

Still a little confussed. Does the air pump open the 5 and 6 ports on a N/A 1988. I done a little search and I receive mixed results. some say that the air pump does open them and others say that they are controled by back pressure. I thought the air pump was for emissions and the air tube off of the cat opens the 5 and 6 port from back pressure. Is this correct or not???

Spraintz

iTrader: (1)

86-88 NA's use exhaust backpressure to open em.

89-91 use the air pump

Fitness Stain

what about an 88 turbo....
i removed the air pump....
TREE-HATER

thats not going to effect me is it????
i dont think it will but i have nothing better to do other than ask!
=-dustin

Icemark

spraintz is correct

Icemark

You don't have 5th/6th ports on a 13BT

the only thing it will effect is that your cat will probably overheat and distroy itself...

luv'n my 7

which isn't that big of a deal anyway! Rip those cats out of your car to free upi the exhaust, if you dont hve emitions in you area.

If you dont have enough backpressure to open em up then do what im gonna do. Buy a pre-silencer, that will give you enough backpressure to open those son's a bitches up!

Fitness Stain

dont worry.....
my cats were gone when i bought the car.....
thats why i did the elimination.....
figured i was already half-way there

RotorJoe

on that note, How do you tell if your 5th and 6th ports are functioning properly???

RotorJoe

Does the Racing Beat PreSilencer have enough back pressure to operate the ports??

marcus219

ive been told that mated with the rb header it does have enough to open the ports...

RotorJoe

Thank You, that is the set up I am running (RB Header w/ RB PreSilencer and no air pump) and I also have the CorkSport single side out cat back system.

Daedalus

So does this mean that the 89+ don't have the split air tube on their cats?

RotorJoe

not sure dude, mine is an 88