This is topic Smog question? in forum Tech Talk at Northern California Ford Owners .
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Posted by EPIK (Member # 7481) on
:
I know this won't pass a California visual, but I was wondering if this setup would pass a sniffer emission test?
The car is a 91 LX 5.0, 5 speed...The combo is...
-Stock bottom end
-Edelbrock heads & RPM II manifold
-E cam
-LT's & catted midpipe (possibly a custom 4 cat midpipe, but 2 cats at the minimum)
-C&L maf & 24# injectors
-Mac cold air intake
-Smog pump delete
-pullies
-stock timing & fuel pressure
Sorry if this is a noob question, but how do you guys think this would do with a sniffer test?
[ March 29, 2010, 03:50 AM: Message edited by: EPIK ]
Posted by 50 Deep (Member # 6216) on
:
FAIL!!!
2 high flow cats would barely pass with shorties and would fail for sure without the pump.
4 high flow cats might get you there but without the smog pump to inject air into the exhaust and clean things up I doubt it. Maybe 4 high flows with the smog pump.
4 CA legal cats are gonna run you $400+exhaust work and that might get you through without the smog pump. Probably pass for sure with the smog pump.
That's my guess
Posted by jordan_0806 (Member # 5888) on
:
quote:
Originally posted by 50 Deep:
FAIL!!!
2 high flow cats would barely pass with shorties and would fail for sure without the pump.
4 high flow cats might get you there but without the smog pump to inject air into the exhaust and clean things up I doubt it. Maybe 4 high flows with the smog pump.
4 CA legal cats are gonna run you $400+exhaust work and that might get you through without the smog pump. Probably pass for sure with the smog pump.
That's my guess
not entirely true...even though every car is different. my last coupe passed with just dual cats...with flying colors
but in dustin's case, I would swap to stock headers and exhaust ....should be okay since you don't have anything radical on that car...
if you know someone who just wants to make sure it will pass sniffer, I would 4 cat the long tubes
[ March 29, 2010, 02:33 PM: Message edited by: jordan_0806 ]
Posted by essasin (Member # 4741) on
:
I don't think you can pass without a smog pump. The clean air it pumps into the exhaust really helps pass the sniffer. It's supposed to burn spent gases but I think it just pumps enough oxygen to balance out the carbon for a reading out the tail pipes.
Running 2 cat mid pipe and LTs is very plausible. There are a good amount of cars that run an HCI combo and some with blowers that pass with two cats.
Posted by EPIK (Member # 7481) on
:
I do still have the smog pump, just don't have it installed. So you guys think that with this combo, a 2 cat h pipe, stock timing & the smog pump hooked up it will pass the sniffer?
Posted by threethirty1 (Member # 7814) on
:
My 331 passed with:
afr 185
rpmII
tfs1
bassani catted x
bbk shorties
fuel pressure at 25#s
***Stock 195 t-stat*** was the secret. It wouldnt pass until I installed it.
Posted by EPIK (Member # 7481) on
:
quote:
Originally posted by threethirty1:
My 331 passed with:
afr 185
rpmII
tfs1
bassani catted x
bbk shorties
fuel pressure at 25#s
***Stock 195 t-stat*** was the secret. It wouldnt pass until I installed it.
Did you have the smog pump hooked up?
Posted by 93ReefBlue5.0 (Member # 5780) on
:
quote:
Originally posted by EPIK:
So you guys think that with this combo, a 2 cat h pipe, stock timing & the smog pump hooked up it will pass the sniffer?
yes.
[ March 29, 2010, 11:10 PM: Message edited by: 93ReefBlue5.0 ]
Posted by Luke87GT (Member # 21) on
:
Dustin, I'd install the smog pump, get a stock stat, and get the car HOT before the test using 87 octane.
I think you have a 50/50 shot, depending on the condition of the cats.
[ March 29, 2010, 11:32 PM: Message edited by: Luke87GT ]
Posted by threethirty1 (Member # 7814) on
:
quote:
Originally posted by EPIK:
quote:
Originally posted by threethirty1:
My 331 passed with:
afr 185
rpmII
tfs1
bassani catted x
bbk shorties
fuel pressure at 25#s
***Stock 195 t-stat*** was the secret. It wouldnt pass until I installed it.
Did you have the smog pump hooked up?
Yes, sorry i missed that in your post. But I believe if you get the car hot it will pass.
Shit, i failed 4 times gross polluter before I got that 195 thermostat. The car simply was not getting hot enough.
Posted by EPIK (Member # 7481) on
:
quote:
Originally posted by Luke87GT:
Dustin, I'd install the smog pump, get a stock stat, and get the car HOT before the test using 87 octane.
I think you have a 50/50 shot, depending on the condition of the cats.
Don't have the cats yet, but I plan on buying new cats & making a custom H pipe for the LT's. I will install a stock T stat too. I guess I will throw the smog pump back on as well...
Posted by essasin (Member # 4741) on
:
I'm in the same boat as you. What cats are you going with? I'm having trouble finding ones with CARB number stamped into them.
Posted by EPIK (Member # 7481) on
:
Im just gonna get some universal cats, not worried about the carb #.
Posted by alexdel209 (Member # 9239) on
:
with the smog pump hooked up and cats and stock fuel pressure and timing you should pass.no chance without the smog pump.
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