Just curious to see what the largest cam and the lsa that can be installed and still pass smog based on actual experience and who did the tune. Tia.

 

I have a 218/218 with .561" on a 114 and it passed the NOx and CO tests with flying colors. It also passed the HC tests, but not with flying colors (allowable was like 36ppm and I had like 28ppm). I think my tune was crappy, resulting in poor AFRs during the smog test, so after I get my tune I hope its going to lean out and reduce those HC numbers a bunch.

 

This is a great question.. something I have been struggling with as well as I am close to doing a Heads and Cam swap on my Cali z06. I have emailed LG about this and they responded saying their G5X1E cam was designed to pass emissions. However, seeing that LG is based in Texas, it is designed to pass smog there. Another good question would be how relative Texas smog is to Cali Smog Checks. If they are similiar then this is the solution.

There is a local car they built with AFR heads and this cam that was making 450 RWHP. Seems like a great cam. The Specs for the G5X1 on the LG website are 228/232 degrees of duration with .588/.574 inches of lift and a lobe separation of either 112 or 114. I am not sure how much the G5X1E varies form this. Most likely the 114 degree LSA is used to minimize emissions and maybe a lower duration? This is something ot contact LG about.

Another source I spoke to about this matter is aandacorvettes. I was asking Andy about the comp camp 224 228 Duration Cam with .581/.588lift with 114DEG LSA. He responded saying:

That cam is "iffy" at best for passing california emissions. The 220- 224 comp cam should work.

Im assuming by iffy he meant it would be entirely dependent on the tune, as that could make or break emissions legality as you approach that line. You should probably contact these vendors and speak with them more in depth with your plans. And if you choose to go through aandacorvettes, you can even drive down to oxnard for your tune, and I am sure they will help with making sure your came and tune will pass emissions.

It seems to me like the limit is in the range of 228 degrees of duraiton and .580 inches of lift with an LSA of 114. However, it would be great to have someone contest to this with experience in this state.

I will post back when I do my heads and cam swap this summer. Good luck and keep us posted on your progress. I am curious to know how it all goes.

 

I was told Intake duration in the 220-224 range and exhaust in the 220-228 range should be fine with a good tune (on a 114 LSA I might add).

Personally, I plan to go with a 220 224 .581 .588 114LSA

 

All though I am not from CA I did have a 220/224 115+0 in my 346 and it passed the test fine. I did not have to do any fiddling around or employ any "tricks" to get it to pass either.

 

I have the G5X1-E and from what I was told by LG Jr., I guess it's what you would call a little bit bigger than the G5x1, but on a 115 LSA. I've always wondered how my car would do on a smog check but don't want to spend $50 on a pre-test to find out. Curious to see other's results.

-Rick

 

Rick what are the cam specs on the G5X1-E?

 

I am running a TR 224/224 and passed with flying colors. I have all bolt on's, in the future I plan on going with a bigger cam and Patriot 5.3 Stage II heads with the 90/90 combo. Back when cams for these were coming into the market place, the TR 224 was the rage...now it's a baby cam...LOL

 

Blown-Interceptor, congrats on passing with flying colors, that makes me feel a lot better about stepping up my cam to something like yours. Can you tell us your smog numbers for the three categories (HC, CO, and NOx) and how they compared to the maximum allowable? This should all be on your smog report. I ask so I can get a feeling for which pollutant categories become risky as cam rowdiness increases.

I have heard from Nick at Newtech in the Bay Area that the 224/228 cam becomes borderline for smog, and his girlfriend there has told me that she had a 224/224 cam on a 114 and passed smog. The impression Ive gotten is that one should also go no lower than a 114 LSA.

 

Seems to me that the G5X1-E is the largest cam that anyone here is running. I guess anyone who has experience passing emissions with that cam in cali would answer the question fo whats the largest possible came =]

This cam from LG sounds pretty solid. Its definiteltly the one im most interested in.

 

Calling LG to find out more about it...seems that it puts out maybe 10-15 more rwhp than 224-224 114 lsa xer lobe type cams.

 

I just got off the phone with LG Motorsports. They said the cam is a little bit larger than 224 and has no problem passing emissions in Cal. They wouldn't give specs but i believe its on a wider lsa (115) than g5x1. They have seen rwhp figures of 490 with L92 heads and supporting mods through LG pro and cats. With my TSP 5.3 stg 2.5,ls6 intake and ARH he said i can expect to see around 430. On another thread kilrb posted 410 rwhp with same heads (tsp 5.3 stg 2.5) LGM streets, tr224+4 and ls6 intake. I know dynos read differently and the tune can also make a difference but kind of supports the 10-15 rwhp more if all things are equal assumption. It would be nice if someone posts some dyno figures with this cam along with their supporting mods.

 

How does the TR 224/224 compare to the stock ZO6 cam..anyone know?

 

The 2002-2004 z06 cam specs are .551/.555, 204/218 117.5 lsa...TR 224/224 will make much more power with headers...all things being equal.

 

Don't know why it say's "Ernie Trans Am" at the top, looking below, you'll see it's my file (emailed to me).




470rwhp/436rwt
AFR 205's @ 63cc
FAST 90/LS2 both ported by Tony Mamo
LG G5X1E
LG Street Series headers w/cats
Ford SVO 30's flow matched
Powerbond UD pulley
Halltech CAI
*lots of other supporting stuff*


-Rick

 

I met with Rick a couple of months ago to check out his G5X1-E/AFR Z06. The car screams! Driveability was very near stock, and cats with the Ti's keep it pretty quiet. I really wish CA didn't have such lame smog rules.

 

Thanks Rick! Just what i think a lot of us here in Ca. wanted to see...big hp #'s from a cam that can be smogged without having to go fi in a 346 motor.

 

THERE IS HOPE AFTERALL!! Oh as soon as word really gets out with the cali folks on this forum... LG's G5x1E cam is going to start selling like crazy! haha

Well, seems like this is the setup to use... I dont see any reason why someone would want any other cam in cali if they want power and emissions friendliness.

Props to LG for designing an incredible product. I am itching to call and order my heads and cam. But, one thing at a time. Must install my pfadt coilovers and swaybars first.

Heads and cam comming soon.

 

After talking to LG I was informed that this set up was putting down about 470 rwhp.. but I was surprised that the lg street headers were at the same level as the lg pros. I feel the more research I have been doing there doesnt seem to be too much of an advantage of having the pros over the streets unless you are making 600+ hp. I mean, this is proof that the streets perform just as well as the pros yet at 60 percent of the price. Kinda puts a new perspective on it. Thanks for the info.. it definitely helps with the decision on headers.

 

There is a youtube video of the LG g5x1-e cam that i posted on a thread with a T/A that sounds sick..for those that haven't seen that thread here it is
http://youtube.com/watch?v=A1hb58Y1MUA