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Catalytic converter..

Old 01-19-2010, 09:13 PM
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Catalytic converter..

Anyone swapped theirs out for a hiflow or just completely removed it or something?
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Old 01-19-2010, 09:35 PM
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Says it's suitable for race cars, would it be worth it to put it on my street-only 8?
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Old 01-20-2010, 03:43 AM
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not me. that was swoope, I poo-poo'd it when he first got, but it's lasted him well

my latest cat has several times more flow area, more flow per cpi, premium catalyst materials, and is rated for 400+ BHP, but the negative is it cost 6x more than the Davesport unit



.
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Old 01-20-2010, 07:20 AM
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Does that have O2 sensors? Looks to me like it does not, especially since it is universal.
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Old 01-20-2010, 07:52 AM
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Originally Posted by TeamRX8 View Post
not me. that was swoope, I poo-poo'd it when he first got, but it's lasted him well

my latest cat has several times more flow area, more flow per cpi, premium catalyst materials, and is rated for 400+ BHP, but the negative is it cost 6x more than the Davesport unit
.
And I was the one to tell Swoope about it.

Originally Posted by michaelsk8er View Post
Does that have O2 sensors? Looks to me like it does not, especially since it is universal.
If your midpipe doesn't already have it, a new bung will have to be welded on to accept the 2nd O2 sensor.
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Old 01-20-2010, 09:18 AM
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Originally Posted by michaelsk8er View Post
Does that have O2 sensors? Looks to me like it does not, especially since it is universal.
it's a universal cat converter only that's available in several tube sizes, no piping or anything else
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Old 01-20-2010, 01:36 PM
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Dave called me to confirm my pipe size prior to shipping - real nice guy to talk to. Mine measured 3.25" inside diameter where I need to weld it.
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Old 01-20-2010, 01:44 PM
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Nemesis: what pipe are you welding it into?
I've considered cutting up my RP High Flow and possibly having a davesport Cat welded into it.
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Old 01-20-2010, 01:47 PM
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Originally Posted by Jedi54 View Post
Nemesis: what pipe are you welding it into?
I've considered cutting up my RP High Flow and possibly having a davesport Cat welded into it.
I'm going to be doing the same thing.
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Old 01-20-2010, 02:01 PM
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Originally Posted by alnielsen View Post
And I was the one to tell Swoope about it.

If your midpipe doesn't already have it, a new bung will have to be welded on to accept the 2nd O2 sensor.
In a S2 the O2 bung is in the CAT itself, not the midpipe. It has front O2 sensor at the end of the header and a rear O2 in the CAT itself. No idea if you can move it outside the CAT without a CEL though. I'm still running stock but I do remember the layout from my header install.
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Old 01-20-2010, 02:03 PM
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Yes you can. That is how it is setup on the aftermarket items.
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Old 01-20-2010, 02:09 PM
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3.25" inside diameter?

That makes no sense .....
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Old 01-20-2010, 02:15 PM
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Originally Posted by michaelsk8er View Post
In a S2 the O2 bung is in the CAT itself, not the midpipe. It has front O2 sensor at the end of the header and a rear O2 in the CAT itself. No idea if you can move it outside the CAT without a CEL though. I'm still running stock but I do remember the layout from my header install.


The OE converter has two catalyst bricks with a space between them and the O2 sensor reads the exhaust gas in this space. The aftermarket cat is a single catalyst brick. Putting a bung after it is the same as the OE setup as far as the rear O2 sensor is concerned, it's just that there isn't a second catalyst brick after it takes the exhaust reading.
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Old 01-20-2010, 02:56 PM
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Originally Posted by TeamRX8 View Post
3.25" inside diameter?

That makes no sense .....
Let me check again tonight, because that does sound odd. Jedi - I will be working on a Racing Beat straight race midpipe.

Last edited by Nemesis8; 01-20-2010 at 02:58 PM.
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Old 01-20-2010, 03:02 PM
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very nice Nemesis: can't wait to hear what you think of this cat.
Where's swoope been? Maybe I'll harass him for some more info on these things. While I like my RP cat, I am on my second one and am not sure how much longer this one will last. Some people have great luck with them, others don't.


Al: if you get around to doing this, let me know what the pipe diamater is, would ya? Or if I beat you to it, I'll send the info to you.
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Old 01-20-2010, 03:06 PM
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That's 3" OD, so the cat should be 3" ID if it's a slip in and weld on fit

why are all the S1 owners discussing this in the S2 forum?
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Old 01-20-2010, 03:07 PM
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Originally Posted by Jedi54 View Post
very nice Nemesis: can't wait to hear what you think of this cat.
Where's swoope been? Maybe I'll harass him for some more info on these things. While I like my RP cat, I am on my second one and am not sure how much longer this one will last. Some people have great luck with them, others don't.


Al: if you get around to doing this, let me know what the pipe diamater is, would ya? Or if I beat you to it, I'll send the info to you.
I have the blown rp cat and hipo cat sitting around. I just haven't done anything with it yet.

Swoope did something different with his setup. He put the cat to the rear of the midpipe in hopes that the exhaust gas would cool slightly and possibly lengthen the life of the cat. I'm not sure that is necessary with this cat. It will also require an extension cable to reach the new location for the last O2 sensor.
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Old 01-20-2010, 03:14 PM
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Originally Posted by TeamRX8 View Post
That's 3" OD, so the cat should be 3" ID if it's a slip in and weld on fit
3" on the RP cat piping?
Muchas gracias Team.

Originally Posted by TeamRX8 View Post
why are all the S1 owners discussing this in the S2 forum?
awwww, CRAP!!
didn't even notice this was in the S2 forum. I blame Nemesis for this...
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Old 01-20-2010, 04:36 PM
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Doesn't even know the details of the parts on his car, the force is weaksauce on this one

actually I was referring to the RB pipe, they're both 3" OD tube

http://www.rx7.com/store/rx8/rx8exhaust.html

http://www.racingbeat.com/resultset....rtnumber=16201

.
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Old 01-20-2010, 07:18 PM
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It's 3.25" ID. My camera is at the office, so look tomorrow for a scaled pic.
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Old 01-21-2010, 12:46 AM
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as
this is very off topic. and i have been on vacation..

mark... yep,, it works! suck it!

ray.. told you. do it.. you have help..

i would say about 5 of them are running..

i am at 39k miles..

beers

Last edited by swoope; 01-21-2010 at 12:50 AM.
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Old 01-21-2010, 12:49 AM
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Originally Posted by alnielsen View Post
I have the blown rp cat and hipo cat sitting around. I just haven't done anything with it yet.

Swoope did something different with his setup. He put the cat to the rear of the midpipe in hopes that the exhaust gas would cool slightly and possibly lengthen the life of the cat. I'm not sure that is necessary with this cat. It will also require an extension cable to reach the new location for the last O2 sensor.
i dont know what you are talking about,,

but mark did provide a link to a extended o2 sensor link.. that works now..

the first one did not.. had to send it back, but they did get it right..

beers
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Old 01-21-2010, 12:53 AM
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Thread hijackers suck..
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Old 01-21-2010, 01:13 AM
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Originally Posted by DarkLord7854 View Post
Thread hijackers suck..
yep,,

no info here..

move along..

beers
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Old 01-21-2010, 11:47 AM
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Originally Posted by TeamRX8 View Post
That's 3" OD, so the cat should be 3" ID if it's a slip in and weld on fit

why are all the S1 owners discussing this in the S2 forum?
Because their post count goes up!
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