I am wondering how hard it would be too detune my 7730 for california smog emisions, it has been tuned for performance and too work with 58mm throttle body, ported 083 heads with 2.02 1.60s, and a lt4 hot cam but i only have the 1.5 rockers on it right now? These crazy shops want alot of money, is it that hard or are they ripping me off?

 

If you are located in Southern California than Kevin91Z can do it for you. He is located in Orange, California.

 

damn thats kinda far im in fresno, california

 

i wonder how much he would charge though or whats a decent price?

 

will you be tested at wot?

 

The cam may be a problem also

 

the cam shouldnt matter as long as it isnt burning too rich. no they do not test at wot

 

do u have your egr, smog pump,and correct exhaust?

 

The cam will matter, mine failed because of it.
And it's a small cam.

 

Yes i have all the correct stuff installed for smog, just need it detuned because it was tuned for performance like the timming and air fuel ratio, the guy who was supose too tune it for smog said he has had bigger cams than that lt4 hotcam in vehicals and has been able too detune them for smog with no problem so im thinkin since i only have the 1.5 rockers on right now that it shojld pass easy with it detuned

 

Sorry, you will see

 

If your drivability tune is correct there is no need to change anything to pass smog.

After all, they test at 15 and 25 MPH.

If you fail it is not the cams fault, it's the tuner.

Kevin has tuned much larger cams than a LT4 hot cam and they pass the test just fine.

HTH

 

dyno don, do you think it might be able too pass right now since it was tunned with hallowed out cats and i have just installed brand new ones so it will run leaner?

 

Adding cats won't make it leaner, it will clean up the pollutants.

However, if it is running rich down low, it will ruin the new cats in time.
The biggest killer to a cat is raw fuel, after all, it is just an afterburner, it burns up any fuel that didn't get burned in the combustion process.

 

ok cool ty for the info, when he did the tune he kept the air fuel ratio at about 15.0 im pretty possitive he didnt want it running too rich because i had just had the motor built and diddnt want it too flood the motor because the rings wouldnt seat properly

 

when they were testing in ohio... they tested at all different speeds...I made sure I drove the car for app. 30 min and left it running before the test.

 

cool ill definitly try that before i go

 

Just took a chance and went too smog the car and it passed with flying colors

 

Dam how do you guys pass, my cam has a big lope to it as soon as they heard
that they said no. They said bring it back when it's stock

 

very nice