Whats the largest cam that will pass texas emissions

I was thinking hotcam and cc305 but will an xe 224/230 pass? Or maybe something in between the hotcam and 224/230?

Im in the dallas area, and im asking because they have emissions....

just get the cam you want and take it to a small, no offence but "mexican" shop and get it inspected there ive done that for years

:thumb: its easy to cheat emmisions dont let that decide what kinda parts to put on your car...put a huge whapin cam in your car

plus im sure there is someone on this board who lives close to you and can do inspections at there shop

Yes, you can get a xe 224/230 to legally pass. But, with almost any aftermarket cam, it depends on the tuning. Actually, I've seen much larger cams pass harris county dyno emissions testing.

Well I know of certain people who can pass me i just dont wanna worry about doing it illegaly, but I would like to hear some loopholes. I thought you could only get a valid inspection in the county you live in...?

THere are some loopholes around that law.... i think you can get an inspection in a county you dont live in if you are a student.

There are other ways too, im just not sure.

As far as cams go, duration and overlap are what wont let you pass.

Id get a custom grind with some huge lift. That would be your best bet.

Anywhere I can go to check out the loopholes, or anyone know of any others or can anyone verify that a student can go to another county?

I really dont think you need to worry about loopholes with the cams you listed. They should easily pass, assuming the rest of your exhaust system is up to par, you've got good cat(s), and decent programming.

thing is I dont want to be restricted to them, I only chose them because I may need them to pass.... this isnt a drag car so midrange is more important but maybe something bigger will work better...

sweet

Originally posted by flor585
the student loophole works, if you want to know more loopholes go to an inspection place and look at the paper tht list them all. there are several things.

if nothign else just go to a few places and say your a student untill it works, im sure it wouldnt take but a try or two.
if your an older guy it should still work too, just say your working on your phd or somthing. might want to know the name of whereeveryour "going to school" technical schools and stuff are ok too.


brook


LOL.. I don't know where you got this info from, but it's completely false. If he went to any local inspection station. all he'd get is a crazy look from the inspector ~ followed shortly thereafter by a "so, what's your point?" .. And even if they didn't test for emissions, they'd still do a visual check for cats.

So.... gut your cats, they have to be there ~ visually.. Even if they're non functional.

Originally posted by spoetzel
:thumb: its easy to cheat emmisions dont let that decide what kinda parts to put on your car...put a huge whapin cam in your car

plus im sure there is someone on this board who lives close to you and can do inspections at there shop

Are you going to pay his fines or defend him ?
Get REAL folks the emissions testing is spreading, all the
out side counties of DFW are next, Ellis,Johnson next year etc.Soon it will be everywhere. And I can't believe there are
inpection stations willing to chance the HUGE fines for cheating.

its not necessarily "student" oriented, but as long as you keep your PERMANENT address in a non-emissions county it doesn't matter if your TEMPORARY address is in an emissions county...

even when i move permanently to the dallas/ft worth area, ill still be keeping my permanent address in brazos county where my parents are...

Originally posted by flor585

lets pretend your right,
how is it that my car is registered in harris county(emission county) and I get my insections in brazos county(no emissions) and they also had papers about this issue??

Don't know... Don't care. ;)


It means "road trip" time for anyone looking to try and "buck the system" that lives close to D/FW obviously. My point pertained to him actually staying in an emissions county and saying he doesn't need to get checked if he didn't reside there.... Even though he/she does.

Well, exactly how big of a cam do you want to go with anyway???

Well for the sake of emissions the 224/230 cam with mild headwork is all im thinking about, but im planning on having this my daily driven/autocross (roadrace maybe in future) car so what ever gives me the power I want in the range Ill use most autoxing. Not decided yet, im keeping it simple at the moment because this isnt going to be the last thing I do so its gonna stay simple and inexpensive. Dont want to go to far and make too much power and be unreliable having to rev a stock shortblock to 7k. so maybe an emissions legal cam is all I need, once the car is together and im at that point ill know exactly what im gonna do but for now I was wondering whats I can pass with and now how to get by having to pass so I dont even have to worry....

You'll do just fine with the cam you've selected , If the computor is unmodified , and the cats are functional , you will pass the emissions test !! The computor is there to monitor emissions as part of its role , if you had an emissions problem , then the check engine light (or SES ) would come on for various reasons , i.e. "system too rich , bank one and two , or catalyst inefficient bank one or two , etc. etc. , I'm an ASE certified Master tech and have a state inspectors license. The cats are there to CLEAN up your exhaust , thats their purpose , you can go fast AND be clean !! (just ask anybody in California !!) Now if you go TOO far with mods , then the cats can't do their jobs as designed , but the cam you specified should be within reasonable limits ! Surf the California boards and they can tell you when you are aproaching "No mans land !! Hope this helps !!:) :)

1Bad80-Z is right about cats, but I think im gonna disagree on the computer issue. If you get the PCM tuned it will run better emmisions wise. The PCM tune will allow the computer to better calculate the incomming air without having to rely as much on the o2 sensors.

The computer will tell you if anything is WAY outta whack, but wont necessarily tell you if you are running rich or lean. My car had a pretty small cc305 cam and it ran RICH until i got it tuned and it ran better. You will pass easier if you get that sucker tuned for the cam you want.

If you wanna pass with the most power, get some long tubes with EGR and Air, use cats, and dont remove air or EGR when you get your PCM tuned. Talk to Lloyd Elliot or Joe Overton, they have some nice cams that will pull much harder than a hotcam or cc305 and will still pass emmisions.

Disco , I'm not trying to start an argument , but this is what I do for a living !! The Engine computor is VERY sensitive !!! It WILL tell you if the engine is running rich or lean !! If the O2's see a rich or lean condition for more than 30 seconds , then the SES (Or check engine light WILL illuminate !!
) OBD II diagnostics are VERY sensitive , and unless the PCM has been reprogrammed it WILL see any discrepancies and a telltale will follow. The only time that the SES light won't illuminate is when the computor can compensate for the rich or lean condition , It's calles short term fuel trim and the PCM is capable of corrections within certain parameters , if or when , these parameters are exceded , then the SES light is illuminated to tell the driver that a diagnostic routine is required to find out what the cause is. Just trying to educate the ones looking to push the envelope !!!:) :)

What about if I unplugged injectors and plugs to a few cylinders to dilute the offending gases? BTW I have tunercat and datamaster so I can do anything tuning wise the pcm allows...

OMG, dont just start unplugging stuff. Maybe if you had TPI, but not with MPFI. If you started unplugging injectors, you could burn a valve or your rings, who knows. It will just run that one cylinder VERY lean. The others will still be rich, maybe get worse. I dont even know if the PCM would let it run like that.

Originally posted by disco192
OMG, dont just start unplugging stuff. Maybe if you had TPI, but not with MPFI. If you started unplugging injectors, you could burn a valve or your rings, who knows. It will just run that one cylinder VERY lean. The others will still be rich, maybe get worse. I dont even know if the PCM would let it run like that.

If you run it in open loop, it wont make corrections to fatten up the other cylinders.
If you dont have combustion in the cyclinder you can't run lean and burn valves or rings - your just pumping air.

Either way its not a very good idea. If anything, it would cause the other cylinders to run very rich due to the excess oxygen in the exhaust.

No. If, you program the car to run in "open loop" then the computer wont make corrections for the 02 sensor readings and the other cylinders will not be richened.

i was assuming closed loop.

Open loop is only at WOT.

or under a certain coolant temp... I have tunercat and datamaster and I am running on an open loop tune right now anyways.... so do you think that would work??

Originally posted by disco192
i was assuming closed loop.

Open loop is only at WOT.

Nope - Computers can be programmed to run in open loop at all throttle positions, not just WOT.

So would that help any? Not sure if thats trreh way it works or not...?

A few definitions here. Open loop= The PCM operates under certain defined parameters programed into the PCM by the factory. Closed loop= The action taken by the PCM when the engine reaches a certain temp. ( 150 deg. ) and the O2 sensors are at their operational temp. and have begun to occilate (swing) above and below the .5 volt parameter , and #3 is time. Time , temp. , and O2 operation are the three requirement for closed loop. Mind you that this discussion can be a VERY lenthy subject , but this is it in a nutshell. If you disabled one or more injectors , then the SES light will illuminate for missfires on those affected cyl's. A pissy inspector has the right to pull codes on your vehicle if the SES light is on to see if you're violating emissions regulations ( alot do !! ) Again , the cam you are talking about is not big enough that the PCM can't compensate for. You're gonna need alot of overlap to pass enough raw gasses through the cats that the cats can't handle. Thats their job !!:) :)

I agree, he should be able to pass the cams he originally suggested, but he's also mentioned that he may be going bigger. I've passed much larger myself with a bit of tuning, but pulling an injector clip can also be a viable option, with the right programming, if needed to pass with a big cam. No offense, but many tech inspectors will give you the green light, as long as you pass the sniffer (especially the kiddos that work at the sticker stops and such), but if needed, the SES light can be disconnected, if it cant be programmed out.

And with a few small exceptions I agree with your open/closed loop definitions. Aftermarket programing can change the open/closed loop triggers, so they are not bound by the factory settings.

Yes I may go bigger, if I can use it without too much added cost. I assume to dissconect the ses light you have to pull the dash?

With the proper wiring diagram you can put a switch in the ground side ( computor) of the SES light to disable the light until you need it. The SES light has a constant hot and the PCM grounds the other side to illuminate the light when a problem has been detected. If needed , I can tell you the wire (Color code and PCM location ) that you'll need to tap into . :)