Is Emissions Compliant and Performance Possible???
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New User
Joined: Aug 2002
Posts: 15
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From: Springfield USA
Is Emissions Compliant and Performance Possible???
I'm considering a mild cam (Crane 255DEH), lifter, timing set for a 400. Also considering an new intake but have to pass the sniffer in the state of Virginia. Is this possible? If you had to pass the sniffer with a 400, and was looking at performance upgrades, what would you do? Thanks in advance for any advice.
Hotshot
Joined: Oct 2002
Posts: 18,488
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From: The Big, Oregon
Is Emissions Compliant and Performance Possible???
If an HP engine is set up properly, it will pass emmissions better than a stock engine. I have a 300-6, built, that I took through emmissions. There was no visual inspection, though. The readings are: HC 32.8ppm, CO 0.31%, and NOx 647.2ppm. These were all pass numbers for an 84 F-250, and further, I had no cats or EGR!
Jared
Jared
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Joined: Jan 2002
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From: San Luis Obispo
Is Emissions Compliant and Performance Possible???
You should be fine as long as you dont have to have a visual inspection. Here in California I cant add a 4bbl because of that reason. I did install a rv cam and some hi-po valve springs and passed smog with no problem. Good luck
Posting Guru
Joined: Aug 2000
Posts: 1,127
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From: (near) Denver USA
Is Emissions Compliant and Performance Possible???
Dillon77,
You mean the Comp Cams 255DEH? I've seen that cam in M-block 400s pass the 2-speed idle emissions test easily in Colorado, both with and without smog pump and cat.
With a smog pump and cat, you could get a lot more cam than that to pass emissions. In the 400 buildup article in 09/98 HotRod magazine, they imply (didn't state it explicitly) that they could pass CA emissions with the custom grind cam they used (duration 224/230 @ 0.050").
You mean the Comp Cams 255DEH? I've seen that cam in M-block 400s pass the 2-speed idle emissions test easily in Colorado, both with and without smog pump and cat.
With a smog pump and cat, you could get a lot more cam than that to pass emissions. In the 400 buildup article in 09/98 HotRod magazine, they imply (didn't state it explicitly) that they could pass CA emissions with the custom grind cam they used (duration 224/230 @ 0.050").
Lead Driver
Joined: Nov 2000
Posts: 6,628
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From: Albuquerque
Is Emissions Compliant and Performance Possible???
where I live the N0x and CO3 levels are not set that low for 400s. The emmission's equipment on these engines was not very effective in the first place. A well tuned engine using the regular preperation should make it at least at idle.
Posting Legend
Joined: Sep 2001
Posts: 30,255
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Is Emissions Compliant and Performance Possible???
I agree with the esteemed gentlemen above.
AND-
You can set up an air pump to run constantly to help reduce HC :-)
You could always try to set up your 4V intake with a 2V to 4V adaptor plate and use a stock carb, who knows it might make it thru an inspection...
Maybe a stock color paint job on the aluminum and grind off the name/logo?
Remove the labels on "performance" components and paint them black? Unless of course they have a CARB #.
Set up the egr system properly.
Thanks for using FTE!
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AND-
You can set up an air pump to run constantly to help reduce HC :-)
You could always try to set up your 4V intake with a 2V to 4V adaptor plate and use a stock carb, who knows it might make it thru an inspection...
Maybe a stock color paint job on the aluminum and grind off the name/logo?
Remove the labels on "performance" components and paint them black? Unless of course they have a CARB #.
Set up the egr system properly.
Thanks for using FTE!
[font color=red]As a Moderator I do not "Subscribe" to most topics,
please send email/pm if you need a reply -Thanks![/font]
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