Call it what you want but you sure as hell can't call it "stealth".


Not sure what kind of track times it would have done with the JBA shorty headers it came with as I installed LT's literally a couple days after I bought it.

 

I would clearly categorize it as "cammed" . Even a cam with -8* overlap might have a clearly detectable cam sound depending on the tune, and exhaust system on the car.

 

Any idea if an EPS 222/226 .597/.598 113LSA would pass smog?

 

It is a -2 overlap, prolly too much, maybe with some tuning tricks??

 

 

what about the TSP228R? im looking for a cam for my 04 gto 2443 heads shorty headers catless mids? any sugestions.

 

The eps TT2 would work with -4* OL (even though -6* would be better with a 114lsa), and it has a wider split which you need. http://www.engpwrsys.com/index.php?a...od&productId=5

 

you dont think something with a little more duration?

 

You could, but then you'd need to go with a wider lsa which will flatten the TRq curve and drop the DCR. The bigger cam might have better power above 5k, but not below.

 

To pass smog that cam would need at least a 115 LSA probably a 116 minimum. I have that one on a 114LSA and no way would it pass smog.

 

Hi Tyler,
To pass in Cali comfortably, you should plan on -6 overlap. Let us assume that you are a regular guy that has no access to favors or dishonest testers, -6 with smaller intake duration has better chances of passing.
In situations where strict rules do apply there are many ways to squeeze power.
From my experience, lack of overlap has to be compensated and a good way to do that NA is increase flow in and a more violent bang (Give it compression). So to give you an example of something to run in Cali:
-AFR 210 heads, milled to desired compression for fuel/cam used.
-Cam, 220/224 114+4 LSA

Overlap is calculated as follow:

({Intake duration+exhaust duration} divided by 2) minus- (2 times lsa)

 

With the new smog laws, the new smog machine will automatically fail with any aftermarket tune. Its going to be a doozey to pass

 

Do you have good solid info on that...?
If you do a link to that info would be greatly appreciated.

 

well i talk to 2 different star station shop and they both said that. one of them said that the new machines are coming out next year. I don't know how reliable they are since they probably saying this to scare me and to cover their own asses

 

^^It sure pays to know somebody if you know what I mean.

 

What if I have access to marginal favors, etc., but nothing magical? Like if I stick a monster cam in it obviously they can't do much because it's going to fail the sniffer no matter what... but is there a way they could screw with it on the dyno if it were right on the ragged edge?

Obviously visual and whatever isn't a concern as long as there's a way to get through the sniffer.

Also, are LTs just a visual issue or will they cause a sniffer fail too? Assuming I could run O2 extensions and everything to retain sensors.

 

I know this is an old thread. But since smog has been on my mind lately, I figure I should answer it for future reference. Long tubes are basically a visual fail. Although there is a remote chance that long tubes may not allow the cats to get sufficiently warm during testing to pass the sniffer, this is unlikely. More than likely, long tubes WOULD pass the sniffer test.

Cams, on the other hand, are the opposite. Although there are no CARB legal cams (thus making ANY cam swap illegal), NOBODY is going to tear down your engine to verify the use of stock cams with a micrometer. Therefore, cams couldn't fail visually. They CAN fail the sniffer, though.

 

Bringing this back from the recently dead, but now that CA smog tests are computer and visual only (no sniffer) for 2000 and up vehicles, will an aftermarket cam prevent any readiness monitors from setting? The smog computer checks that all readiness monitors are set and that they have not been turned off via an aftermarket tune. The tech will reset all the monitors and fail the test if any show ready on restart. Would really appreciate it if somebody could update the info here in light of recent changes in the testing procedure.

 

A mild cam will pass smog emissions. There was a video of a red Camaro earlier in this thread with a 224 cam. I'm pretty confident that would pass smog, unless the smog ref owns one of these cars and knows exactly how it's supposed to idle. If your car is clean and by the book, the smog ref will look less closely in the details of your car.

I also have a pair of JBA short tube headers CA legal for sale if you'd like them. Brand new never installed. I wanted to be smog compliant but hey, you only live once.

 

I just think anything with any kind of rough idle will alert the tester, even if it "sniffs" clean. Now that they only do visual and plug into the OBD2 port, hard to say if they fail any aftermarket tune. GM dealers reflash stuff all the time, and I would think a GOOD tuner could make a smooth tune "transparent".