83 euro cat. whats inside
#1
Rennlist Member
Thread Starter
83 euro cat. whats inside
I was wondering what's inside of the cat converter of a 83 euro catalytic converter. two pipes in and two pipes out. Is there an X crossover or just strait through? Would an x pipe be a good idea in place of the converter or just a waste of effort. I think the converter is just about shot.
#3
Rennlist Member
The stock twin cats that you have are connected with an H pipe in front of them where the two exhaust pipes from the manifolds connect to the converters themselves.
You can put an X pipe in its place, many have done it.
You can put an X pipe in its place, many have done it.
#5
Rennlist Member
Thread Starter
HI STRIKEMASTER . So it's an intermediate muffler then on to a resonator next then final muffler? If no cat why is there a smog pump? This car is stone cold grey market with NO federalization done to it that I can find. The car is kinda loud so maybe it is a muffler going bad and not a cat. I can't see an h pipe anyware either. Does your car have one. thank you for your reply... Rob
#6
Drifting
My '83 euro pipes.
Mine is a WP0ZZZ car---No cats, air pump, EGR No H, Y or X pipe Duel exhaust pipes all the way back. K-Jet CIS...When I put an A/F gauge in it, I put it in the right side header because the floor pan already had a plugged hole for the wire in the floor on that side..I'll see if I can find some pix of the pipes and post them . Here's some from the PET. The first one shows the rear half. In pix-2, part #8 IS listed as a catalytic converter but only for the M-28.3/4 engines.....Same looking part on mine but it sounds more 'hollow' than a cat should when I bang on it. Part #1 in pic-1 replaces part#12 in pic-2 on my car. Part#8 in pic-2 has 2 short pipes coming out of it on my car, not a single flange coupling as shown.. I don't know how much gas mixing goes on in it. Anyone ever taken one apart??
Last edited by STRIKEMASTER; 09-13-2017 at 11:49 AM. Reason: More info
#7
Rennlist Member
Thread Starter
My car seems to be set up just like yours. Do you think an x pipe in place of the front muffler would have any benefit? WPOZZZ car as well. I would love to see those pix for sure. I don't have a camera to show mine with. Thanx for the effort....
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#8
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Thread Starter
Part #8 is the cat converter on my US car with one pipe coming out. On the euro there are two short pipes coming out. My question is, is it a cat converter or, muffler? IT seems most dual exhausts that I've seen have an x or h pipe to balance output. So, I was wondering if a crossover exists inside the first can coming off the headers. thanks for the pix.
#9
Drifting
Euro pipes
Here's some pics underneath my '83..As you can see , no cats. The A/F sensor is on the passenger's side because there's already a hole in the floor pan near the C.E panel..
#10
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Thread Starter
Thanks for the pix STRIKEMASTER. Mine looks just like your set-up. Is the A/F sensor for a wide band gauge? So..no catatonic diverter, but just a muffler. Any need for the smog pump Without A cat? Thank you for the effort with the pix.................Rob
#11
Drifting
No air pump on mine, No cat to feed air into ...I'd like to be able to mount the alternator where the air pump should go, make it less vulnerable to high manhole covers..LOL Has anyone done that?
I put an APSX D2 wide band kit in it...$139.99 on Ebay..I used the Passenger's side because there's a hole in the floor on that side so I don't have to cut one. CIS is not individually adjustable and I have new M-B ***047 injectors and a rebuilt FD from 928Intl, so I consider the readings from the Pass. side to be representative of the system..
I just thought of a 'shade tree' way to see if the exhaust mixes: After you get the A/F bung installed, squirt a little oil in that pipe and cap off the bung. If smoke comes out both pipes when you fire it up, then it mixes both sides.
As a side note What's the production# (last 4 digits) on yours? Mine is 1138, Like the first George Lucas film THX-1138
I put an APSX D2 wide band kit in it...$139.99 on Ebay..I used the Passenger's side because there's a hole in the floor on that side so I don't have to cut one. CIS is not individually adjustable and I have new M-B ***047 injectors and a rebuilt FD from 928Intl, so I consider the readings from the Pass. side to be representative of the system..
I just thought of a 'shade tree' way to see if the exhaust mixes: After you get the A/F bung installed, squirt a little oil in that pipe and cap off the bung. If smoke comes out both pipes when you fire it up, then it mixes both sides.
As a side note What's the production# (last 4 digits) on yours? Mine is 1138, Like the first George Lucas film THX-1138
#12
Rennlist Member
On my 84 Euro (LH) with no cats, but with the Euro front muffler, there is an air pump which feeds air into the back of the heads. This is the factory setup. Not sure if that is the same for earlier CIS Euros...
#13
Burning Brakes
Part #8 is the cat converter on my US car with one pipe coming out. On the euro there are two short pipes coming out. My question is, is it a cat converter or, muffler? IT seems most dual exhausts that I've seen have an x or h pipe to balance output. So, I was wondering if a crossover exists inside the first can coming off the headers. thanks for the pix.
For what it's worth, I'm looking for one of the single-outlet Euro versions for my car. There has to be someone out there who has one sitting under their workbench who would like to see it go back onto a car that had one originally. Obviously, it's NOT a performance enhancing piece!
Maybe it wouldn't be that hard for a good exhaust shop to construct one out of a similar sized muffler & the remains of a U.S. cat with the same inlet/outlet. Of course, for "off-road use only"