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View Full Version : anyone have a test pipe on their turbo'd 2ZZ?

SLOWICA
07-14-2005, 04:18 PM
Just checking to see if anyone has done this... maybe this may be my cure to the severe loss in power? Pics would be greatly appreciated.
SLOWICA
07-14-2005, 04:18 PM
What happens when your ECU (in my case an Apex PFC) doesn't sense a difference in oxygen readings after the cat?
Black_TRD
07-14-2005, 05:31 PM
every one i know with a turbo car dont have a cat(including celicas and matrix with the 2zz), specially with the power fc you will not have to mod the second o2 sensor because it does not use it for anything

its best to not have a cat, maybe you will need to tune it a bit because of the increase in flow
Jesse IL
07-14-2005, 05:54 PM
You want to have fun, try this:

Get an O2 bung installed in your downpipe. It will cost like $25 and you can have a plug in it most of the time. This also allows you to put a wideband O2 there if you get one or for tuning. So now that you have your bung there, screw your front O2 into and remove the rest of the exhaust (unplug the rear O2 in the car and pull the grommet back through). Talk about ****ing loud, but it sounds awesome. With that crappy XS map, you'll might get some surging in first and second like I did.
Jesse IL
07-14-2005, 05:55 PM
What happens when your ECU (in my case an Apex PFC) doesn't sense a difference in oxygen readings after the cat?

The second O2 is not used with the PFC. PFC = OBDI = no after-cat O2
Smaay
07-14-2005, 11:15 PM
What happens when your ECU (in my case an Apex PFC) doesn't sense a difference in oxygen readings after the cat?

The second O2 is not used with the PFC. PFC = OBDI = no after-cat O2



correct. look at my down pipe, its 3" all the way back and the 2 bungs are for the factory O@ and the AEM wideband

http://www.controlledinertia.com/Portals/0/399/new%20wastegate.JPG
zerocooll21
07-14-2005, 11:21 PM
Looks good jeff :) Is it still at mikes or you got that in yet??
SLOWICA
07-15-2005, 08:34 AM
where can I buy bungs and caps?
Jesse IL
07-15-2005, 11:35 AM
where can I buy bungs and caps?

Exhaust shops will have them. The plugs are basiicaly just like the threads on the O2 sensor.
SLOWICA
07-15-2005, 06:59 PM
where can I buy bungs and caps?

Exhaust shops will have them. The plugs are basiicaly just like the threads on the O2 sensor.

And the same goes for bungs... thanks...
youngxlos
07-15-2005, 10:43 PM
is that ITB on the back??? how much???? any specs on them???
Smaay
07-15-2005, 11:07 PM
oh yeah the car is running now..in fact i took it to the track last friday...on 5psi i ran a 14.1 @ 99 at LACR...not too bad on 5 psi...
cool2miketlu
07-15-2005, 11:37 PM
I don't see any ITB, a big external wastegate but no ITB... Unless I am blind
youngxlos
07-16-2005, 06:01 AM
here look
http://www.filehigh.com/serve.php?u=902&i=25783&t=.jpg
Jesse IL
07-16-2005, 06:44 AM
That's probably from a motorcycle.
zerocooll21
07-16-2005, 11:51 AM
oh yeah the car is running now..in fact i took it to the track last friday...on 5psi i ran a 14.1 @ 99 at LACR...not too bad on 5 psi...

Some good #'s for 5 but why you runnin such a low boost??
Smaay
07-16-2005, 04:51 PM
those are ITB from an 4AG i believe... i dont have my AVC-R hooked up yet so that what the spring in my wastegate puts out...