Amazing the difference a functioning cat makes

[dguy]

Before:

	Limit [/b]	Reading [/b]
HC ppm [/b]	106	82
CO % [/b]	0.59	0.68 [/color]
NO ppm [/b]	1164	1445 [/color]

After:

	Limit [/b]	Reading [/b]
HC ppm [/b]	106	20
CO % [/b]	0.59	0.02
NO ppm [/b]	1164	695

Phew.  Now I can put her in to hibernation, before the M.T.O. starts flinging salt everywhere...  

[BootMachine]

WOW...big diff!

[WillEV]

Was that a hight flow cat you used?

[dguy]

Was that a hight flow cat you used?

Yup.  It's the one which Rodney Dickman sells.  (go to the "Engine" tab of his page, and look for Replacement Catalytic Converter.

Including shipping & whatnot it worked out to about the same price as a high-flow stainless steel cat from local sources, plus extension pipes, plus hassle.  A 20 minute install with a saws-all or other handy cutting tool to remove the old cat.

The only thing I'm not entirely pleased with as far as Rodney's cat goes, is that the s/s clamps he includes.  The extensions which mate up to the OEM exhaust are 2 1/8", but the clamps he sends are 2 1/4".  Then again just try and find a 2 1/8" stainless steel muffler clamp.    I ended up spending another $4 at CTC for a pair of proper size mild steel clamps.

[2ML67]

I am glad your car passed e-test but I still feel my idea of a 3800SC swap would of been easier. Changing complete set up is much easier than changing one small piece. How do you like that logic (works for me). Dan

[aaron88]

I disagree Dan

I think you went the hard way, because you used the auto that came with your motor.  I think you generated all sorts of unnecessary electrical troubleshooting requirements.

Besides with the northstar the cat isn’t even required (because I don’t feel like making it fit) and what could be easier than not putting the cat on at all.

Aaron

.

[dguy]

I am glad your car passed e-test but I still feel my idea of a 3800SC swap would of been easier. Changing complete set up is much easier than changing one small piece. How do you like that logic (works for me).

"Complete" setup?  Oh puh-lease!  Unless something has changed recently, you're still missing 1 pedal in the cockpit.  

Show me a tweaked L67 mated up to a 4-spd Muncie & 3.32 diff, then we'll talk.