Want my 383 to be emissions legal
10-31-2008, 01:54 PM
#1
Registered User
Thread Starter
Join Date: Jun 2000
Location: Fairfax, VA
Posts: 306
Want my 383 to be emissions legal
Hey all, it's been a while since I worked on my Formula due to a job relocation form Boston to Fairfax, VA. Specs are in my sig.
I'll be moving to a larger apartment with an attached garage in a couple of months, and would like to start working on my Formula again. My main concern is making my 383 emissions-legal so that I no longer have the headaches associated with finding someone to pass me. Virginia only gives 30 days to pass the emissions inspection after registering an auto.
My plan is to swap out the CC306 with something a lot milder and less lopey. The 306 is way to loud, which caused me to install THREE twister mufflers (3.5" in place of the cat, and two 2.5" right before the tips) in addition to the muffler that came with my Flowmaster AT cat-back. The result isn't bad, much quieter, but the sound is a little muted although people have complimented me on the sound. Also, there is a ton of cam surge under 2000 RPM since the 306 is all top-end.
I'm looking for a very streetable cam with 114 LSA that will start making power at around 2000 RPM. I'm also open to the idea of new heads. The LE2's valve seals are leaking lots of oil, causing blue smoke at startup and during shifting at higher RPMs.
What options do I have so that I'll be able to pass emissions and keep as much HP on the table as possible?
One more thing, my compression is pretty low right now, I think maybe around 9.75:1, although I need to double-check it. I'm toying with the idea of adding a SC -- kinda makes sense with me trying to find a mild cam and already having low compression, right?
I'll be moving to a larger apartment with an attached garage in a couple of months, and would like to start working on my Formula again. My main concern is making my 383 emissions-legal so that I no longer have the headaches associated with finding someone to pass me. Virginia only gives 30 days to pass the emissions inspection after registering an auto.
My plan is to swap out the CC306 with something a lot milder and less lopey. The 306 is way to loud, which caused me to install THREE twister mufflers (3.5" in place of the cat, and two 2.5" right before the tips) in addition to the muffler that came with my Flowmaster AT cat-back. The result isn't bad, much quieter, but the sound is a little muted although people have complimented me on the sound. Also, there is a ton of cam surge under 2000 RPM since the 306 is all top-end.
I'm looking for a very streetable cam with 114 LSA that will start making power at around 2000 RPM. I'm also open to the idea of new heads. The LE2's valve seals are leaking lots of oil, causing blue smoke at startup and during shifting at higher RPMs.
What options do I have so that I'll be able to pass emissions and keep as much HP on the table as possible?
One more thing, my compression is pretty low right now, I think maybe around 9.75:1, although I need to double-check it. I'm toying with the idea of adding a SC -- kinda makes sense with me trying to find a mild cam and already having low compression, right?
10-31-2008, 02:35 PM
#2
Registered User
Join Date: Sep 2007
Location: CA, home of the smog nazi
Posts: 1,356
You could try an emissions cam from Lloyd. It's close to a CC 503 but with more lift, 112 LSA, and makes good power. The heads won't hurt you for emissions, you might just consider changing the valve seals.
I'm not sure how much a SC effects emissions, you might try the Forced Induction section.
I'm not sure how much a SC effects emissions, you might try the Forced Induction section.
11-01-2008, 11:36 PM
#4
Registered User
Join Date: Jul 2006
Posts: 290
Here is what I did to pass in Ca, should work in your state too
https://www.camaroz28.com/forums/sho...d.php?t=634651
https://www.camaroz28.com/forums/sho...d.php?t=634651
11-02-2008, 01:06 PM
#5
Registered User
Join Date: Mar 2004
Posts: 2,705
If your going to be taking apart your motor anyway you could sell your current heads for something with larger chambers, than you could drop plently of compression. But even with a headgasket you should be able to get to 9.5.1.
I would toss is a smaller blower cam and look for a used s trim or a smaller procharger. You could pick up all lost hp from the smaller cam, probably even gain some some and still pass emissions in VA.
If you get an intercooled setup or go with meth injection you can really make some power.
I would toss is a smaller blower cam and look for a used s trim or a smaller procharger. You could pick up all lost hp from the smaller cam, probably even gain some some and still pass emissions in VA.
If you get an intercooled setup or go with meth injection you can really make some power.
11-03-2008, 07:54 AM
#6
Registered User
Thread Starter
Join Date: Jun 2000
Location: Fairfax, VA
Posts: 306
Here is what I did to pass in Ca, should work in your state too
https://www.camaroz28.com/forums/sho...d.php?t=634651
https://www.camaroz28.com/forums/sho...d.php?t=634651
If your going to be taking apart your motor anyway you could sell your current heads for something with larger chambers, than you could drop plently of compression. But even with a headgasket you should be able to get to 9.5.1.
I would toss is a smaller blower cam and look for a used s trim or a smaller procharger. You could pick up all lost hp from the smaller cam, probably even gain some some and still pass emissions in VA.
If you get an intercooled setup or go with meth injection you can really make some power.
I would toss is a smaller blower cam and look for a used s trim or a smaller procharger. You could pick up all lost hp from the smaller cam, probably even gain some some and still pass emissions in VA.
If you get an intercooled setup or go with meth injection you can really make some power.
I have some time to decide, as I need to pull my top end apart first
11-03-2008, 08:26 PM
#7
Registered User
Join Date: Mar 2004
Posts: 2,705
the 114lsa will make it pretty emissions friendly. But its not everything.
As for finding a cheap blower, the market falls 500 pts everyother day, rebounds but never that much. If you stay on top of the FS section you will find some steals in the coming months.
As for finding a cheap blower, the market falls 500 pts everyother day, rebounds but never that much. If you stay on top of the FS section you will find some steals in the coming months.
11-05-2008, 11:53 AM
#8
Registered User
Join Date: Mar 2005
Location: BayArea, CA
Posts: 72
I passed CA smog with this one in my 383.. stock heads tho
edit: btw, I'm trying to sell it if you are interested.. lol
Comp Cams XFI LT1 Camshaft, 218 / 224, .570 / .565 113 LSA, Very Strong mid range powerband. Headers, exhaust, computer tuning recommended.
edit: btw, I'm trying to sell it if you are interested.. lol
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