Results 1 to 5 of 5

Thread: SM needles for SU's

  1. #1
    Adicted to G's Z06C5R's Avatar
    Member ID
    CZCC-7982
    Join Date
    Mar 2005
    Location
    CT
    Posts
    7

    Default SM needles for SU's

    Hey all, I'm new here... I've been over at Zcar for about a year, and thought I'd start posting here too, for a second opinion.

    Anyhoo - I'm looking into procuring some SM needles for my '71, and I was wondering if they would be a worthwhile upgrade for my otherwise stock L24 (although I will probably upgrade my coil and plug wires at the same time)?

  2. #2
    zguitar71 zguitar71's Avatar
    Member ID
    CZCC-7611
    Join Date
    Dec 2004
    Location
    Missoula, Montana
    Age
    50
    Posts
    462

    Default

    A lot of people go from Z car site to Z car site, I am one of them. I think I responded to your question on Zcar.com. I think the SM needles will not do any thing for the stock 2.4, they can make the mixture too rich too. I know a person with them on a 2.4 and he has not had any problems but I do not think he has gained much from them either.
    Did I hit that cone?
    1/71 series II 240z, 920 gold (AKA baby poo yellow, but I love it anyway)
    Christopher Gray

  3. #3
    beandip beandip's Avatar
    Member ID
    CZCC-1887
    Join Date
    Mar 2002
    Location
    Beaverton, Oregon
    Age
    81
    Posts
    4,038

    Default

    Quote Originally Posted by Z06C5R
    Hey all, I'm new here... I've been over at Zcar for about a year, and thought I'd start posting here too, for a second opinion.

    Anyhoo - I'm looking into procuring some SM needles for my '71, and I was wondering if they would be a worthwhile upgrade for my otherwise stock L24 (although I will probably upgrade my coil and plug wires at the same time)?
    There has been this misinformation passed on for a long time about SM needles. DONT DO IT. Even with a built 280 , they are too rich and will cause engine damage in the long term. The excess fuel in the chambers will wash away and or delute the oil film and early piston wear will be the result. The excess gas will also delute the oil in the crank case and bearing dammage is the result. I have pages of documentation on this , actually Kim Blough from IDAHO Z CAR , has done extensive testing in this area . He has published the findings . As well as several others. I have a never used set I will sell cheep. Gary
    I'd rather die while I am living than live while I am dieing. CZC 1887 IZCC 12602 Member of NorthWest Z Car Club

  4. #4
    Adicted to G's Z06C5R's Avatar
    Member ID
    CZCC-7982
    Join Date
    Mar 2005
    Location
    CT
    Posts
    7

    Default

    So even if I upgraded the coil and wires to try and burn the extra fuel, it'd still be too rich? I was also thinking of putting a lighter weight oil in the dampers to lean it out a little under acceleration...

  5. #5
    Registered User landmizzle's Avatar
    Member ID
    CZCC-4054
    Join Date
    Apr 2003
    Location
    Modesto,CA
    Age
    55
    Posts
    129

    Default

    Howdy,

    I would highly recommend that if your engine is stock (viz. stock bore and stroke, stock cam, etc.) that you not use the SM needles. You will not benefit from them.
    I use the SM needles and love them. However, my 240Z engine has been stroked out to 2.8 Liters and it has a mildly aggressive cam that really comes on strong at around 4000 RPM. In addition, the valves have been enlarged to the 280Z version and I've had some port work done on the head.
    With those changes, the SM needles work great. In your case I would pass on them or wait to use them after you've done some modifications that will benefit from their use.


    Best Regards,

    Landmizzle '72 240Z

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •