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Old 06-12-2019, 08:53 PM   #76
GeneralBurrito
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Originally Posted by Redwood Chair View Post
Looks like your exhaust manifold isn't quite sealed up.
Yeah I've taken it off and inspected it, no visual cracks. I got a flat block and sanded down the surface to be as flat as possible, replaced the manifold gaskets, checked other gaskets, and I can still hear the slight tick of an exhaust leak. The 2 rear manifold gaskets that I replaced were really pitted and had some type of liquid on them after removing, are they not torqued enough? I read it's between 15-22 ft-lb, and I always do it to 20 ft-lb with a couple ugga duggas after.
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Old 06-12-2019, 09:03 PM   #77
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If it runs good run it, hillbilly pulse air and all.

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Folks on here don't know a good deal when they see it.
how psi stock cna support?

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Old 06-14-2019, 08:52 AM   #78
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Originally Posted by GeneralBurrito View Post

Passed
So the car measured ZERO emissions? Was it actually running???

EDIT: Comparison below: The difference is pretty dramatic.
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File Type: jpg emissionsmed.jpg (93.7 KB, 56 views)
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Old 06-14-2019, 10:33 AM   #79
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I know, I was surprised myself. I heard and partially viewed the entire thing. Car had the sniffer in just like before and was on the dyno. I don't know if the low numbers were from possibly still running lean? The car still drove perfectly fine, if not a little better after doing the ignition timing.

If anything, the car is secretly a Tesla, and the B230F and exhaust noise is just a disguise.
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Old 06-14-2019, 10:37 AM   #80
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I know, I was surprised myself. I heard and partially viewed the entire thing. Car had the sniffer in just like before and was on the dyno. I don't know if the low numbers were from possibly still running lean? The car still drove perfectly fine, if not a little better after doing the ignition timing.

If anything, the car is secretly a Tesla, and the B230F and exhaust noise is just a disguise.
My experience is an over-lean running car will elevate NOx readings. So it looks like it's running fine and maybe you have a really good cat that's burning off everything.
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Old 06-14-2019, 11:04 AM   #81
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My 1995 945 always did really low numbers when it was tested. The tech joked that the air in the shop was probably dirtier! Since it’s a 95 it no longer needs to be tested here in Connecticut, the last test it had 355k on it and easily passed.
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Old 06-14-2019, 11:17 AM   #82
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My experience is an over-lean running car will elevate NOx readings. So it looks like it's running fine and maybe you have a really good cat that's burning off everything.
Just a simple and cheap (compared to other companies) Walker 81111. Still fairly new since the car is for driving to school and back with the occasional grocery run. A plus from the Walker cat is that it's 2.25" so it fit perfectly with the OEM turbo exhaust piping.
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Old 06-14-2019, 02:05 PM   #83
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My experience is an over-lean running car will elevate NOx readings. So it looks like it's running fine and maybe you have a really good cat that's burning off everything.
It's called a THREE WAY catalytic converter. It cleans up THREE pollutants: CO, HC, and NOX.

A good kitty will knock all the numbers down close to zero.

Here is a smog dilema thread:

http://forums.turbobricks.com/showthread.php?t=330758
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Old 06-14-2019, 02:19 PM   #84
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It's called a THREE WAY catalytic converter. It cleans up THREE pollutants: CO, HC, and NOX.
A good kitty will knock all the numbers down close to zero.
Didn't know there was such a thing as a three way, just CARB compliant cats.
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Old 06-14-2019, 02:34 PM   #85
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Default A three way?

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Originally Posted by GeneralBurrito View Post
Didn't know there was such a thing as a three way, just CARB compliant cats.
Google Fu

http://www.walkerexhaust.com/support...ytic-converter

Last edited by ZVOLV; 06-14-2019 at 02:40 PM..
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Old 06-14-2019, 03:16 PM   #86
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Time to take it all apart and make racecar
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I believe the D24 was designed by hitler himself.
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Old 06-14-2019, 03:23 PM   #87
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Time to take it all apart and make racecar
Already chopping off the manifold. No pipes to restrict exhaust flow=faster, right?
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Old 06-14-2019, 04:47 PM   #88
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Quote:
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Didn't know there was such a thing as a three way, just CARB compliant cats.
The converters on the old carburated cars starting in 75 were two way. Volvo used the three way first in 77 with the lambda control. Last time I looked to buy a two way converter I couldn't find one. lol.
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Old 06-19-2019, 11:27 AM   #89
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I had a three way once on Denver my truck ran so dirty the tech advised I keep the Wisconsin plate (supercharged 355), however the tech helped me tune for altitude and with a jet and idle air bleed change the air was cleaner and i got better gas mileage
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