112 lsa cam in cali
06-28-2004, 10:24 PM
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112 lsa cam in cali I done a search already and couldn't find what I was lookin for anyways,what is the biggest cam lift and duration that I can use to pass on a 112* lsa.I've heard people pass the hotcam with a good smog tune.would that be as big as I could go with a 112* lsa?
06-29-2004, 12:48 AM
#4
agreed, all in the tune and overlap of the cam. if your trying to stay legal then i wouldnt push it, stick with what has proven to pass. no sense in getting something and hoping your tuner is able to get you to pass. or you can just say **** it and get what you want and cam swap.
06-30-2004, 09:51 PM
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Originally Posted by jrp
agreed, all in the tune and overlap of the cam. if your trying to stay legal then i wouldnt push it, stick with what has proven to pass. no sense in getting something and hoping your tuner is able to get you to pass. or you can just say **** it and get what you want and cam swap.
anyway I was lookin into a 224 but on a 112*lsa,I wanted to have some lope to it 
do you guys know if anyone makes a 2 piece timing cover,that way it will make cam swapping easier. 
07-01-2004, 02:27 AM
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Originally Posted by lock down
I spoke to Dave at Black Magic Racing in Hayward and he told me that there is a company working on the 2 piece timing cover
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07-01-2004, 10:42 PM
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A 112 LSA is almost guaranteed not to pass the sniffer in California; haven't seen one person do it even with tuning, a 224/224 114 Cam is biggest cam I've ever seen pass the sinffer here in Cali.
07-02-2004, 01:06 AM
#11
Originally Posted by Linear Velocity
A 112 LSA is almost guaranteed not to pass the sniffer in California; haven't seen one person do it even with tuning, a 224/224 114 Cam is biggest cam I've ever seen pass the sinffer here in Cali.
07-02-2004, 01:31 AM
#12
Originally Posted by Linear Velocity
A 112 LSA is almost guaranteed not to pass the sniffer in California; haven't seen one person do it even with tuning, a 224/224 114 Cam is biggest cam I've ever seen pass the sinffer here in Cali.
My '00 SS has a 220º/220º .581"/.581" XER cam with 112º lsa installed +4º. It also has an A4 trans and stock t/c. The exhaust system is completly stock including exhaust manifolds. the car sailed through the Cali smog test recently. Also, my '01 Silverado has a 214º/214º .560"/.560" 112º lsa cam and it also sailed past the test only exam.
Earlier this year I watched a Berger ZL-1 Camaro with the rare 427cid breeze through the Cali smog test. These cars are equipped with cams with over .600" lift and duration over 236º@.050". It also had the GMMG LT headers, high flow CATS and sewer pipe for exhaust. (I don't see LT headers hurting emissions therefore if the smog tech ignores their presence, you got away with SOMETHING).
What I'm trying to point out is that the onboard computer through the closed loop system is capable of correcting the a/f ratio under medium load conditions so to achieve stoich a/f ratio and therefore a clean tail pipe. Some daring individuals have passed their states emissions test without CATS using long cams with narrow lobe centers.
PCM tuning may or may not be required dependng on exact cam profile.
Hope this helps..........
Good luck,
Richard
07-02-2004, 02:50 AM
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I have a 112 in Cal but I also have -4 overlap. Stay away from cams with overlap and you should be gold. Also, if you are running stock heads you don't need to go that big. A 220 or 222 will make plenty of power. Check out my numbers through a 12 bolt with 4.11's. Good luck!
07-02-2004, 09:25 AM
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Would corking up the exhaust a bit help with a larger duration cam?
The idea being that the extra exhaust backpressure would negate some of the scavenging effects of overlap.
Overlap is what fails emissions, right?
The idea being that the extra exhaust backpressure would negate some of the scavenging effects of overlap.
Overlap is what fails emissions, right?
07-02-2004, 10:00 AM
#15
Originally Posted by Richard@WCCH
I hate to do this but......................
My '00 SS has a 220º/220º .581"/.581" XER cam with 112º lsa installed +4º. It also has an A4 trans and stock t/c. The exhaust system is completly stock including exhaust manifolds. the car sailed through the Cali smog test recently. Also, my '01 Silverado has a 214º/214º .560"/.560" 112º lsa cam and it also sailed past the test only exam.
Earlier this year I watched a Berger ZL-1 Camaro with the rare 427cid breeze through the Cali smog test. These cars are equipped with cams with over .600" lift and duration over 236º@.050". It also had the GMMG LT headers, high flow CATS and sewer pipe for exhaust. (I don't see LT headers hurting emissions therefore if the smog tech ignores their presence, you got away with SOMETHING).
What I'm trying to point out is that the onboard computer through the closed loop system is capable of correcting the a/f ratio under medium load conditions so to achieve stoich a/f ratio and therefore a clean tail pipe. Some daring individuals have passed their states emissions test without CATS using long cams with narrow lobe centers.
PCM tuning may or may not be required dependng on exact cam profile.
Hope this helps..........
Good luck,
Richard
My '00 SS has a 220º/220º .581"/.581" XER cam with 112º lsa installed +4º. It also has an A4 trans and stock t/c. The exhaust system is completly stock including exhaust manifolds. the car sailed through the Cali smog test recently. Also, my '01 Silverado has a 214º/214º .560"/.560" 112º lsa cam and it also sailed past the test only exam.
Earlier this year I watched a Berger ZL-1 Camaro with the rare 427cid breeze through the Cali smog test. These cars are equipped with cams with over .600" lift and duration over 236º@.050". It also had the GMMG LT headers, high flow CATS and sewer pipe for exhaust. (I don't see LT headers hurting emissions therefore if the smog tech ignores their presence, you got away with SOMETHING).
What I'm trying to point out is that the onboard computer through the closed loop system is capable of correcting the a/f ratio under medium load conditions so to achieve stoich a/f ratio and therefore a clean tail pipe. Some daring individuals have passed their states emissions test without CATS using long cams with narrow lobe centers.
PCM tuning may or may not be required dependng on exact cam profile.
Hope this helps..........
Good luck,
Richard
Last edited by Oatmeal; 07-02-2004 at 09:07 PM.
07-02-2004, 10:58 AM
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In my truck i have a 224/232-558/568 112lsa and with no cats, its on the edge of passing. With alittle tuning it will pass no problem or i can just throw on my cats and pass the way it is.
07-02-2004, 02:51 PM
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Originally Posted by Richard@WCCH
I hate to do this but......................
My '00 SS has a 220º/220º .581"/.581" XER cam with 112º lsa installed +4º. It also has an A4 trans and stock t/c. The exhaust system is completly stock including exhaust manifolds. the car sailed through the Cali smog test recently. Also, my '01 Silverado has a 214º/214º .560"/.560" 112º lsa cam and it also sailed past the test only exam.
Earlier this year I watched a Berger ZL-1 Camaro with the rare 427cid breeze through the Cali smog test. These cars are equipped with cams with over .600" lift and duration over 236º@.050". It also had the GMMG LT headers, high flow CATS and sewer pipe for exhaust. (I don't see LT headers hurting emissions therefore if the smog tech ignores their presence, you got away with SOMETHING).
What I'm trying to point out is that the onboard computer through the closed loop system is capable of correcting the a/f ratio under medium load conditions so to achieve stoich a/f ratio and therefore a clean tail pipe. Some daring individuals have passed their states emissions test without CATS using long cams with narrow lobe centers.
PCM tuning may or may not be required dependng on exact cam profile.
Hope this helps..........
Good luck,
Richard
My '00 SS has a 220º/220º .581"/.581" XER cam with 112º lsa installed +4º. It also has an A4 trans and stock t/c. The exhaust system is completly stock including exhaust manifolds. the car sailed through the Cali smog test recently. Also, my '01 Silverado has a 214º/214º .560"/.560" 112º lsa cam and it also sailed past the test only exam.
Earlier this year I watched a Berger ZL-1 Camaro with the rare 427cid breeze through the Cali smog test. These cars are equipped with cams with over .600" lift and duration over 236º@.050". It also had the GMMG LT headers, high flow CATS and sewer pipe for exhaust. (I don't see LT headers hurting emissions therefore if the smog tech ignores their presence, you got away with SOMETHING).
What I'm trying to point out is that the onboard computer through the closed loop system is capable of correcting the a/f ratio under medium load conditions so to achieve stoich a/f ratio and therefore a clean tail pipe. Some daring individuals have passed their states emissions test without CATS using long cams with narrow lobe centers.
PCM tuning may or may not be required dependng on exact cam profile.
Hope this helps..........
Good luck,
Richard
Yeah I guess with tuning, anything is possible.
But I'd personally have a higher duration cam on a 114, then a smaller one on a 112 for smog purposes. Just adding the I have seen multiple people not pass with a 112 LSA, I haven't seen one person fail with a 114. Again, if it were me 114 would fall under the better safe than sorry category, but to each his own.
07-02-2004, 03:14 PM
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I think overlap has more to do with it than LSA. However, the cam I am looking to get will be pushing it at either 0* or -2* of overlap. Yet since the cars are tested at ~1250 rpm, you should be able to get a bigger cam to pass if it is leaned out.
07-02-2004, 08:55 PM
#19
Originally Posted by Trojan T/A
I think overlap has more to do with it than LSA. However, the cam I am looking to get will be pushing it at either 0* or -2* of overlap. Yet since the cars are tested at ~1250 rpm, you should be able to get a bigger cam to pass if it is leaned out.
This is an interesting topic guys. I appreciate all your ideas and input on this one. Any test results are gladly welcomed.
Richard
07-02-2004, 09:15 PM
#20
What is the LSA on those ZL-1 camaro's? I hear these camero's have big cam's from the factory and they seem to pass, Any one have cam spec's on the ZL-1's, I would be happy with just a 224/224/112 in cali. 