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Thread: Wolf Creek Racing - Mikuni 40's

  1. #1
    Registered User Travel'n Man's Avatar
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    Default Wolf Creek Racing - Mikuni 40's

    Just arrived from Wolf Creek Racing

    Todd has done a fantastic job with this new addition to my car. I'm really stoked about getting these on and the car fired up. All soda blasted and ready to set the idle and sync. Pretty close to a plug and play install.

    I'll be removing the current mechanical fuel pump and adding an electric one along with a pressure regulator to maintain fuel pressure at 3 +/- .5 PSI along with a heat shield and triple fuel rail.

    The jetting setup is:
    40mm Mikuni Carbs
    32mm Venturis
    40 Pump Jets
    57.7 Pilot Jets
    150 Main Fuel Jets
    190 Air Connector Jets

    Hometown elevation is 3200 feet

    Hope to install over the weekend - stay tuned for further updates.


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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  2. #2
    Registered User d240zx2's Avatar
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    Wow! That is a PRETTY set-up!
    First & Third owner of HLS30-00721
    B. 01/70 D. 03/12

    New owner of HLS30-15653
    B. 12/70 D.

    Frank in Houston, Texas

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    No doubt! That is drop dead $exy. And emphasis on the $
    1971 240Z HLS30-38691
    93.9% done and getting better every day
    Now with 100% more DATSUN SPIRIT L28 Power
    1968 Datsun 2000 SRL311-03416

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    Default

    Very nice setup indeed. Is the heat shield and triple fuel rail also sourced from Wolf Creek ? What is the pricing level on the shield/rail if i may impolitely ask ?

  5. #5
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    Mike -
    Todd at Wolf Creek Racing could not get the heat shield or the fuel rail. I had to hook up with a guy from Japan to buy and ship it to me. There is a source for the heat shield but I could not find the 3 barb fuel rail anywhere in the states at all.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Heat Shield was a breeze to attach - very supportive and raised edge all the way around to add support to the vibration and heat. I am adding a heat barrier to the underside that reflects heat up to 2000 degree at 90% - gotta keep the fuel cool!

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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    petrolhead spitz17's Avatar
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    Beautiful!!!
    '72 Fairlady 240Z-L - HS30-10052, Imported in 1973 from Yokota Airbase
    '70 240Z - HLS30-19927, History in SCCA CP & Trans-Am, ICSCC CIP, IMSA GTU
    '77 Porsche 930 Turbo Carrera - Black on black
    '13 Subaru BRZ Limited - Daily Driver

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    Those are sweet! Any guess on what kind of horsepower increase they will add?

    Rich

    HLS30-02614 in the Cocoon
    HLS30-40147 Very Yellow Daily Driver
    HLS30-40498 Next resto
    SPL311-27444 It lives
    http://www.rcdeng.com

  9. #9
    Registered User Travel'n Man's Avatar
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    Rich -

    From my understanding talking to Todd at Wolf Racing and Dave at Rebello's they should generate around 40 additional horsepower - my engine output should be close to 270 horsepower with the engine rebuild from last year and the head work from Rebello's. I could have pulled some more horsepower out of it but really no need since my intentions are not to track this car. A different intake manifold would have gotten my closer to 300hp. At some point I will dyno it but just so my plugs are looking good once I get the install done I'm really happy where I am currently. Next years project will be a 5 speed / r200 / upgraded half shafts.

    Hopefully to have this finished up over the weekend - it should just take a couple of hours to get everything hooked up and sync'd.

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    Last edited by Travel'n Man; 04-22-2011 at 04:21 AM.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Very nice. My bet is that you won't be able to keep your foot out of it.

    Bonzi Lon
    1973 HLS30-168500
    1968 SPL311-18100
    1969 HLS30-000110 SOLD Shipped to Dubai UAE
    CZCC#11300

    Ones and Zeros

    "We drive only blue cars." Dishwalla

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    Hopefully install will be finalized tomorrow evening - stay tuned for pictures............... Ended up using a Lokar Throttle Kit that is really much superior to the current linkage. The intake manifold ended up being pretty short and does not give much room to complete the install due to barely having enough room to bolt the intake on. Removed the current bolts and replace with shortened studs. Fuel pump mounted good - inertia switch with relay - fuel pressure regulator. Pressurized the system this evening and fuel lines leaked using the original Datsun fuel clamps. Moving to EFI clamps and may have to change to standard fuel lines instead of the braided fuel line from Canada.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Are those meshy covers on the air horns just protective covers, or are they actually filters?

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    Registered User Marty Rogan's Avatar
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    Quote Originally Posted by Travel'n Man View Post
    Rich -

    From my understanding talking to Todd at Wolf Racing and Dave at Rebello's they should generate around 40 additional horsepower - my engine output should be close to 270 horsepower with the engine rebuild from last year and the head work from Rebello's. I could have pulled some more horsepower out of it but really no need since my intentions are not to track this car. A different intake manifold would have gotten my closer to 300hp. At some point I will dyno it but just so my plugs are looking good once I get the install done I'm really happy where I am currently. Next years project will be a 5 speed / r200 / upgraded half shafts.

    Hopefully to have this finished up over the weekend - it should just take a couple of hours to get everything hooked up and sync'd.

    Click image for larger version. 

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    So, what was done to the motor to get it up to 270HP? Which block did you start with?

  14. #14
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    Wow!! I've heard my SU's for the past several years - I heard the sound of Mikuni's tonight!!

    FANTASTIC is all I can say!!

    If you have thought about it.......do it!! Finalizing timing - idle and air tomorrow...........I'm really fired up!! I had to go back to regular fuel line instead of the black braided - a lot of fuel line leaks - correct pressure at 3psi.

    Marty - Yes - the air horns do have actual filters on them - I would not want to drive on a dirt or gravel road - nor do I plan on it. Check out my garage - the engine is detailed there........N42 Block

    Damn - this is going to be exciting!
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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  15. #15
    Fired Up! JLPurcell's Avatar
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    Beautiful from any angle!
    JLP
    Jerry Purcell
    1970 HLS30 00029 Owner since 1976 Now owned by Les Canaday (Classic Datsun Motorsports)
    1972 HLS30 93606 IZCC Registion #105 Original owner back home after full restoration by Classic Datsun Motorsports

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    Just wanted to catch everybody up on this install

    Power band and torque is fantastic - no real heavy fuel smell as I have heard in the past with triples - sound is excellent - fairly quiet until you get on it and then that beautiful sound of air and exhaust. Highly recommended for anybody that is looking to grab some more HP and Torque out of their engine. Much more power than the SU's had but this is a step up from SU's and should have more power IMO.

    Set up:
    Mikuni 40mm Triples
    Mikuni Air Horns 50mm long / 80mm dia.
    Custom Stack Filters
    Mikuni Manifold
    Carter Fuel Pump: P4070 (a little loud)
    Holley Fuel Regulator: 12-804
    Fuel Pressure Gauge: 2178
    Inline Glass Fuel Filter
    Fuel Line: 8mm or 5/16th
    Fuel Pump Plate
    Pertronix Ignition
    3.0 ohms Coil
    Triple Fuel Rail from Japan
    Heat Shield from Japan
    Heat Barrier: Thermo Tec-13575
    Lokar Throttle Kit: LOK-TC-1000U
    K&N Filters Breathers -
    Fuel Pump Cut-Out Switch w/relay
    Manifold Gasket
    Timing Set @ 12-14degree at 1000 RPM just to get a base setting - final setting was 36 degree at 3000 RPM
    No vacuum advance
    Spark Plug gap set @ .45
    Fuel Pressure at 3 PSI

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    Last edited by Travel'n Man; 05-08-2011 at 05:10 AM.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Quote Originally Posted by Travel'n Man View Post
    Mike -
    Todd at Wolf Creek Racing could not get the heat shield or the fuel rail. I had to hook up with a guy from Japan to buy and ship it to me. There is a source for the heat shield but I could not find the 3 barb fuel rail anywhere in the states at all.
    And what's the source and pricing? I have a set of trip Mikuni 44s from Todd myself.
    '70 240Z - HLS30-08215 - Production Date 8/70
    '70 240Z - HLS30-06293 - Rusty and has Identity Crisis (must have been wrecked and the back 1/2 sectioned in from a later car maybe even a 280Z)...PARTS CAR!
    '71 240Z - HLS30-018482 - Production Date 1/71,Corvette Yellow, driven under a 4Runner, bought for parts, hit lotto with parts on car, may fix and put back on road

    My Photo Gallery

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    Registered User Travel'n Man's Avatar
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    Allen -
    I'll have to get in touch with my guy in Japan and see if I can get him to order any more - Let me check with him and I'll let you know. If he doesn't want to mess with it again the price really doesn't matter.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  19. #19
    Registered User Travel'n Man's Avatar
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    These carbs bring the entire rebuilt engine to life. The sound of the climbing RPM's and the de-acceleration is fantastic!!........head and cam work makeup part of all that along with the headers and exhaust system.

    3 of my plugs were a little on the phat side so I backed off the setting just a little - I'll run 100 miles or so and then re-read all 6. I guess on the initial set up some of my setting were off a 1/4 turn or so.

    Fuel consumption is all based on your right foot......

    Over all this was Z$ well spent!!Click image for larger version. 

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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  20. #20
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    They look delicious. Good job well done I'd say.
    Zed not Zee

    HS30-00352 still being rebuilt (year 6)
    HS30-101370 chopped in half

    CZCC #1608

  21. #21
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    Very, nice and well spent I am sure, cant wait to upgrade my crappy carb set up.

  22. #22
    Registered User Travel'n Man's Avatar
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    Default Plug Reading

    Every 100 miles I roll I am pulling plugs and reading - tweaking each cylinder fuel setting to get the nice light tan/grayish top of the plug. The beautiful thing about these is there is a setting for each plug - they are dead on or not - once your plug is reading correctly you are done.

    Click image for larger version. 

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    http://www.ngksparkplugs.com/tech_su...qs/faqread.asp

    http://www.4secondsflat.com/Spark_plug_reading.html
    Last edited by Travel'n Man; 05-22-2011 at 04:46 AM.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  23. #23
    Registered User Travel'n Man's Avatar
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    She is a absolute thrill to drive every time I start the ignition!! She gets a lot of nods and grins at car shows as well. I've had several people ask me to fire her up just so they can hear the Mikuni triples and the air flow...........you gotta love it!
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  24. #24
    Registered User Travel'n Man's Avatar
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    Default A few updated pictures of the Mikuni's

    Updated pictures from the Wings & Wheels Air Show

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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  25. #25
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    Default OER Corporation

    I have had a few folks interested in how I located the Fuel Railing and Heat Shield.

    I sourced these items from OER Corporation:

    Contact: Yikio Junabiki - OER Customer Service



    1. Heat Shield for L6
    2. 3 Barb Fuel Rail for L6
    3. EMS Shipping


    My delivered total was approx $170 - all monies were handled through PayPal

    I do not think that OER stocks the fuel rail and may depend on availability from their source.

    Click image for larger version. 

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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  26. #26
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    OER did revise their correct contact - Please use the below email address:

    webmaster@tatsumi-company.com

    Dear Mitchell


    We are sorry for our late reply.
    We thank for your kind information. Beautiful car, isn't it!
    ?How about the condition afterwards?

    The OER webshop does not advertise it in particular.
    Because I do not know the method to easily publicize widely all over the world.
    We thank for your message.

    If you can, we would appreciate it if you revise e-mail address to webmaster@tatsumi-company.com instead of my e-mail address yuiko@tatsumi-company.
    Because there are too many junk e-mails.
    It is difficult to find out an important email from that.

    We are very sorry for the inconvenience which it might have caused in your business.

    If there is technical question, please contact us without hesitate.
    Please take care, and I look forward to hearing from you again.

    Best regards,
    Yuiko
    Last edited by Travel'n Man; 06-21-2011 at 03:08 AM.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    I would like the 3 Barb Fuel Rail for L6. I emailed Yuiko @ the email above.

  28. #28
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    Thanks for posting all the details regarding jet and air corrector sizes Mitchell! I've got a Rebello 3.1 Stroker that was tuned for autocross so it appears the mixture is set for the top end. As a result, the plugs are very black and sooty. I am going to adjust the jets and air corrector jets once my car is off the rotisserie, so your post is a good starting point.

    Tom


    Nissan Monterey Blue Early '74 260Z
    RLS30-037826
    Complete rotisserie refreshtoration in process

  29. #29
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    Tom -
    Are your Mikuni's? Are the 40's - 44's - 50's?
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  30. #30
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    Binh asked me to post a couple of pics of my intake - best of luck with your Mikuni quest!

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    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


  31. #31
    Registered User madkaw's Avatar
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    Mitchell,
    Beautiful set-up and congrats. I have set of 40's sitting on a shelf waiting to go on!! I am trying to be patient and doing all my tuning with my SU's, but I truly believe the SU's in stock form do not breathe enough air for a modified air-simple in air-out air physics. Yes SU's can supply plenty of fuel(based on my wideband), but not enough CFM.
    I would strongly recommend a wideband for realtime readings instead of reading plugs. It will be much easier for you to tune and you might be suprised how rich or lean you really are.
    I am waiting to finish my cold air box before installing mine. I am trying to concentrate on eliminating the fuel rail next to the valve cover and having cold air into these carbs.
    Now we need a good in-car video of your car so we can hear them babies sucking air!!
    Again-nice job.
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    Registered User surfer.tech's Avatar
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    Default

    Thanks for the pictures Mitchell. That mikuni intake does look short. I'm concerned that manifold might not clear my Kameari headers. Must get more info...
    HLS30137283

  33. #33
    Registered User esmit208's Avatar
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    WELL
    I used a currency converter to get an idea of what a heat shield would cost. I have a set of OER 47MM that will eventually be installed on Project 3/72. The heat shield cost 5500 yen, approx $70.00. The shipping cost to North America ranges between 9600 yen and 25800 yen. 25800 yen is roughly $331.00. If you use a median shipping price you can expect to pay approx $205.00 for shipping to North America for a heat shield. F#%@&^K
    "HAPPINESS"....isn't just around the corner......"HAPPINESS"....is the CORNER"

  34. #34
    Mike B
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    Quote Originally Posted by esmit208 View Post
    WELL
    I used a currency converter to get an idea of what a heat shield would cost. I have a set of OER 47MM that will eventually be installed on Project 3/72. The heat shield cost 5500 yen, approx $70.00. The shipping cost to North America ranges between 9600 yen and 25800 yen. 25800 yen is roughly $331.00. If you use a median shipping price you can expect to pay approx $205.00 for shipping to North America for a heat shield. F#%@&^K
    Z Car Customs in Oregon sells them for $145, plus $20 shipping
    http://www.zccjdm.com/catalog.php/az..._SOLEX_MIKUNI_

    -Mike

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    Quote Originally Posted by esmit208 View Post
    WELL
    I used a currency converter to get an idea of what a heat shield would cost. I have a set of OER 47MM that will eventually be installed on Project 3/72. The heat shield cost 5500 yen, approx $70.00. The shipping cost to North America ranges between 9600 yen and 25800 yen. 25800 yen is roughly $331.00. If you use a median shipping price you can expect to pay approx $205.00 for shipping to North America for a heat shield. F#%@&^K
    Edward -
    Not sure how you came up with your shipping cost, but when I made my purchase of the heat shield along with the fuel rail shipping was $35.00.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Mitchell,
    have you noticed any difference in your power braking? I am considering a vacuum log for my Mikunis to connect all the ports to increase vacuum for my booster.
    Also, I have been making my heat sheild myself and noticed the accelerator pump linkage has a long throw and I actually had to punch holes in my sheild to allow for travel. Looking at your sheild i am suprised you have enough clearance for full travel of the pump linkages.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    No problems on either end - my angle is great with no interference at all.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Default Balance Tube

    I designed a balance or vaccuum tube for my Mikuni manifold. It was fabricated by a machine shop that specialize in race car parts.

    If you would like a copy of the drawing, please send me a PM.

    Fixitman
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    I opened the links you posted and all prices are in YEN. I didn't know that ZCCJDM stocks the heat shield. Thanks for schooling me. Yes your rig does look good. It's nice to get some raw feedback about performance improvements. Can't wait to hook up the 47's.

    Not sure how you came up with your shipping cost, but when I made my purchase of the heat shield along with the fuel rail shipping was $35.00.[/QUOTE]
    "HAPPINESS"....isn't just around the corner......"HAPPINESS"....is the CORNER"

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    Default 240z

    Hi, I would love to come and see your set up, I use to live in Johnson city, Tn and now live in Nasville, Tn I am in Johnson city a lot and could come up to see your 240Z. I have a 71 240z I have been working on with a Rebello engine installed with SU CARBS I have been thinking about the Mikuni or webers.

  41. #41
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    Michael -
    Shoot me a PM and we can get together. I'm only 1 hour from Johnson City - I don't get me car out after the first salt hits the roads -but I'll be happy to let you see it and fire it up - Mikuni's sound great!
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Just an update for anybody keeping up with this install or thinking of installing Mukini's. With all the beautiful weather we have had this March I've had my car out a lot enjoying the early spring in the Western North Carolina mountains. I filled my car up a couple of weeks ago (when I fired it up for the first time this calendar year) and have driven a couple hundred miles - topped off my gas this afternoon and getting right at 21 MPG. I have had a few spirited drives and some easy town crusing but overall 21 MPG is great with triples and a modified L28. I have seen some threads with folks reporting 8MPG. I really think a lot of folks try to go too big for the cars based on their engine size and then spend forever tuning, adjusting, tweeking, changing jets due to the carbs are too big for the engine. My Mikiuni's have been spot on since day one (with very little fine tuning). I did add an air/fuel gauge inside my glovebox to monitor things. I'll try to post a picture later this week.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    I wanted to update this install with the location that I installed my Air Fuel Gauge. Works great - out of the way and easily accessed for me to monitor if needed. If you're going to tune triples this is a necessity. Close up the glove box door and nobody knows it's there.

    Click image for larger version. 

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    Last edited by Travel'n Man; 04-03-2012 at 07:38 PM.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Mitchell, were did you buy your air fuel gauge? And did you have to install an O2 sensor? I'm trying to figure out an inexpensive way to fine tune my EFI.
    Bob
    Last edited by rcb280z; 04-03-2012 at 08:57 PM.

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    Registered User Travel'n Man's Avatar
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    O2 Sensor and Air Fuel Gauges are not cheap - did a ton of researching and ended up using one at Summit Racing (since the hidden radio was digital I figured why not for the AFR gauge) it reads the digital number and sweeps from halfway down - either on the lean side or the rich side. The 02 sensor installed in the collector of the header. Run some power and your good to go.
    Life's a journey; enjoy the ride!

    Mitchell
    L28 - N42 Block w/Flat tops - N42 Rebello Head & Cam - Triple 40 PHH Mikuni's - Headers - Recaro Seats -
    R180 3.9 Diff - Close Ratio 5 Speed - Toyota Vented Brake Upgrade w/ Porterfield High Performance Pads & Shoes

    1972 Datsun 240z
    HLS30-75040


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    Cool, just as I thought. This would be great for me if I could make it work. California smog laws are tough! This would help me dial it in to pass!

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    Mitchell,

    What are your pilot screws set at- how many turns?
    Also, any regrets for not running the fuel enrichments(chokes)?
    Just started mine today and it didn't seem to want to do much as far as an idle until I engaged the enrichments( It was a cold start)
    Last edited by madkaw; 04-27-2012 at 11:23 AM.
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    Formerly known as Koalia Reverend's Avatar
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    Awesome thread, im hoping to use of this knowhow in my upcoming Weber installation.
    -72 240Z "Goldie"

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