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Want to get rid of emmission control system.

This is a discussion on Want to get rid of emmission control system. within the Open S30 Z Discussions forums, part of the 1st Generation Z (S30) category; I want to ax the complete smog system on my 1972 240 (california car). Are there any articles, etc. on ...


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    Default Want to get rid of emmission control system.

    I want to ax the complete smog system on my 1972 240 (california car). Are there any articles, etc. on doing this? Are there any components that I should absolutely leave or do I just take it off and plug the holes? Any direction is appreciated. Thanks.

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    You need to leave the PCV fitting in the center of the balance tube and the tap for the brake booster hose. Everything else can go away.... Except the linkage to the carbs of course. We supply a couple of iterations of the cleaned up balance tube if you're interested in taking a look.
    www.ztherapy.com
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    Thanks. The balance tube you offer looks clean. Do I have to worry about smog testing when I sell the car? I think I read somewhere that 1975 and older cars do not need smog tests. Is that your understanding?

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    That varies from state to state. Where do you live?
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
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    I'm in Los Angeles, CA.

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    Quote Originally Posted by Todd_S View Post
    I'm in Los Angeles, CA.
    Then your 'home free'. California's smog program only applies to 76 and newer vehicles. You don't have to smog it for a transfer unless it's in that catagory.
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    What's you goal or reason for removing the emmissions equipment? You should probably consider that your engine might run worse without those parts. Otherwise, you'll need to figure out how to retune the engine properly with the parts off.

    FFT...
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    Quote Originally Posted by TomoHawk View Post
    What's you goal or reason for removing the emmissions equipment? You should probably consider that your engine might run worse without those parts. Otherwise, you'll need to figure out how to retune the engine properly with the parts off.

    FFT...
    This is exactly my question too...precisely what do I need to do to remove my smog gear on a 2/71? All that useless weight, with a frozen air pump and a dirty, rusty, "holey" balance tube... for what? How will removing all that junk affect my tuning- which is almost flawless now? I'd love to get one of ZTherapy's tubes, but I don't want to throw my Z into a tizzy randomly pulling "stuff" off.

    2/71 240Z, HLS30-23788. 920 Gold/Black. California car. 5-speed, otherwise all original/paint, stickers & matching #'s. Driven almost daily over my local "road course" along a river. Performing thorough mechanical restoration, using only OEM parts to not ruin the provenance as an "original" car. Please check out my Flickr photostream!
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    Unless you leave a hole open for a leak I doubt you'll notice any difference. This is one of those things that has been done thousands of times with no ill effects. Any "run quality" issues can be addressed by dialing in the carbs. The condiition of ones carbs? That's another issue.............
    Bruce Palmer
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    I have one of the Ztherapy balance tubes on my '70. Runs great and looks really clean, glad I installed it, took some of the varibles away when it came time to tune... fewer varibles increases your chance of successl and less headaches down the road.

    Best regards,

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    Thanks for all the great responses. I appreciate it.

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