Best catalytic converter?
06-20-09, 01:54 PM
#1
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
Best catalytic converter?
I have ten days to pass emmissions. Problem is, Im runnin a carb and premix, hollowed out cat, headers and no smog pump. What im goin to do is buy the best cat converter i can and run a smog pump to the backpressure hose for the
5th and 6th ports (mine r always open)
What is and where can i find the best catalytic converter?
Whats the cleanest burnin premix?
What additives will help?
Should i make and exhaust leak where the o2 sensor goes?
The emmissions guy is a good friend of mine and hes only doing a tailpipe test. Hes on camera and cant do too much for me
Thanks
5th and 6th ports (mine r always open)
What is and where can i find the best catalytic converter?
Whats the cleanest burnin premix?
What additives will help?
Should i make and exhaust leak where the o2 sensor goes?
The emmissions guy is a good friend of mine and hes only doing a tailpipe test. Hes on camera and cant do too much for me
Thanks
06-20-09, 01:59 PM
#2
finally back in an RX-7!!
iTrader: (1)
Join Date: Jun 2003
Location: Northern New Jersey
Posts: 847
Likes: 0
Received 0 Likes
on
0 Posts
there is information about emissions (and how to pass them) in the FAQ.
in terms of the best brand / best working cat - I would be willing to bet that you will get a lot of different opinions, just do some searching around the net...
in terms of the best brand / best working cat - I would be willing to bet that you will get a lot of different opinions, just do some searching around the net...
06-20-09, 02:14 PM
#3
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,832
Received 2,603 Likes
on
1,847 Posts
all the aftermarket cats are basically the same thing, unless you get one of those fancy metal substrate ones.
if you're on a dyno, and the carb is about 14.7, with the airpump air going to the right place and a cat, you should be in the ballpark
if you're on a dyno, and the carb is about 14.7, with the airpump air going to the right place and a cat, you should be in the ballpark
06-20-09, 02:25 PM
#4
If you're willing to have an exhaust shop make one for you, get the biggest element you can find, cut the stock flanges & split ait pipe off & have them welded onto the new one. I use a free one from a Cadilliac dealership that's about 2-3x the size of the stock main cat. It passes smog with flying colors every time.
Trending Topics
06-20-09, 04:06 PM
#8
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
06-20-09, 04:08 PM
#9
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
06-20-09, 11:01 PM
#10
If you're willing to have an exhaust shop make one for you, get the biggest element you can find, cut the stock flanges & split ait pipe off & have them welded onto the new one. I use a free one from a Cadilliac dealership that's about 2-3x the size of the stock main cat. It passes smog with flying colors every time.
But IF you can find a welder definatly just get one in decent shape and use it. Then hold on to it, off of the car of course
, for your next test
06-21-09, 02:52 PM
#14
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
06-21-09, 07:07 PM
#16
the bonez cat here http://www.rx7.com/store/rx7/fcexhaust.html works wit my header but a bigger cat might cleanup up the exhaust more. Im going to loosen up some of the header bolts and make an exhaust leak also.
06-21-09, 07:15 PM
#17
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
06-22-09, 06:47 AM
#19
Right near Malloy
iTrader: (28)
Join Date: Dec 1999
Location: Behind a workbench, repairing FC Electronics.
Posts: 7,841
Received 510 Likes
on
345 Posts
How long will the average Magnaflow or Bosal or Walker cat from the local parts store last behind a rotary anyhow?
I had to have one stuck in my exhaust as well...
RB Header, 2.5" catalytic, XS Power Catback.
I had to have one stuck in my exhaust as well...
RB Header, 2.5" catalytic, XS Power Catback.
06-22-09, 09:58 AM
#20
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
Is this big enough? http://cgi.ebay.com/ebaymotors/MAGNA...Q5fAccessories
06-22-09, 10:36 AM
#21
Probably, as long as whatever it is, it fits. But the bigger it is, the more of an exhaust restriction it will be, which only matters if it's going to be used for a long while.
06-26-09, 10:41 AM
#23
Senior Member
Thread Starter
Join Date: Jun 2006
Location: Connecticut
Posts: 315
Likes: 0
Received 0 Likes
on
0 Posts
I went thru without a cat or smog pump because my temp plate was going to expire, my parts hadn't arrived and i needed to bring results whether pass or fail to dmv to get my plates.
HC CO NOx
LIMIT - 385 - 1.23 - 2692
EMISSIONS- 952 - 7.10 - 0
I'll post my results after the retest with a cat, denatured alchohol and smog pump
HC CO NOx
LIMIT - 385 - 1.23 - 2692
EMISSIONS- 952 - 7.10 - 0
I'll post my results after the retest with a cat, denatured alchohol and smog pump
06-26-09, 11:09 AM
#24
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,832
Received 2,603 Likes
on
1,847 Posts
