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Thread: Weber carb swap info for E16 N12's.......

  1. #1
    Regular pulsar38501 has disabled reputation pulsar38501's Avatar
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    Weber carb swap info for E16 N12's.......

    I was a little surprised to find that there was no previous threads about Weber carb swaps on Pulsar/EXA's, so I figured I'd start one. I personally have done two Weber carbs on these cars - the 32/34 on my street Pulsar, and a 38DGAS for the mini-stock car. I highly recommend this as your next performance upgrade !! Post your questions here and we'll try to help you.100_0073.jpg
    Last edited by pulsar38501; 19th February 2011 at 01:59 PM.

  2. #2
    Club Member Mojo is very helpful round here
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    Moar info!

    Also, what are the gains? Might do this on my E16i, if the gains are worth it.

  3. #3
    Regular pulsar38501 has disabled reputation pulsar38501's Avatar
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    Okay..... Well, the 32/34, to my understanding, is out of production, so the 32/36 is now the recommended carb for this swap. I found on the street Pulsar that the progressive carb is very smooth during the transition, but it lacks a bit of power. This may be due to the smaller throat size of the 32/34 versus the larger 32/36. If you're wondering what the "32" is, that is the primary throttle bore size in millimeters, and the "34" is the secondary throttle bore size.

    On the open highway the Weber produces good power in these cars, and my '85 will cruise all day long at 80 MPH - just don't get caught !! I have a cheap air/fuel ratio gauge conncted to a stock one-wire O2 sensor, and at highway speed the readings look damn-near spot on. The improvement in fuel mileage over the US spec "hopeless chokeless" Hitachi carb was amazing - I actually gained about 5.5 MPG after swapping the carb. One word of advice, though - get the 1983 distributor w/vacuum advance - the one that operates off the computer was a P.O.S. that relies on an exciter and uses the old Hitachi carb's throttle position sensor as a reference to know how much to advance the timing. I burned up three of those damned things before I figured out that it wouldn't work properly with the Weber. I also highly recommend using an ACCEL "Super Coil" and ACCEL 8MM plug wires and NGK plugs with this setup - I have NEVER had any problems out of either ACCEL or NGK products, and I run this setup on both the street and race car - just because it WORKS !!!

    For all out racing and performance, the Weber 38/38 is the recommended carb swap - if, of course, you aren't worried about fuel economy. This is the carb I have installed on the '86 Pulsar that we built for mini-stock racing. I originally had installed a Holley 350CFM 2300 2BBL on this car, but during testing and one race late last year I found that the carb was just way too big for the engine, and that the adapter plate I had to make for it to fit the stock manifold had some transitional airflow problems. I haven't track-tested this setup yet, but I can tell a big difference in the way the car sounds just running it in the garage. We are going to get our chance to find out if we made any improvements this weekend - the first race of the season is Friday night, so I'll let you know more after we try it out and tune it a little bit.....

  4. #4
    Quote Originally Posted by Mojo View Post
    Moar info!

    Also, what are the gains? Might do this on my E16i, if the gains are worth it.
    In my opinion, for the 32/36, it is definately worth it. The power gains on the carb swap alone are not huge but definately noticeable. The increase in MPG is nice too but the best part of it is the reliability of the simple webber over the hitachi. My N12 ran like crap untill I swapped out the carb and now purrs like a kitten EVERY time I start it and I can turn the idle down till it lopes like a damn v8 w/o dieing if i want to.

    A few pics not long after installing my webber, have since went with the taller air filter as the one that came with the carb just didnt let enough air through if it got a little dirty and I spend a lot of time on dusty gravel roads.




  5. #5
    i did a 32/36dgv conversion on my old n12. Engine had a stock rebuild with a stage 2 cam, extractors and 2 1/4" exhaust.
    It went like a dog shot in the bum, and i actually sold the setup to another member of this forum after i sold the car.
    The webber came off a ford escort from memory, full conversion kit cost about $40.
    Still doesnt match the whistle of a turbo
    BOV, Lowered, 3" zorst, pod, Jetspeed "edge" bodykit, blitz fmic, stainless exhaust manafold, bosch 040 pump, exedy hd clutch, profec b spec II ebc, Apexi Power Fc and commander, 19" chrome hp design rims, gt2871r, 740cc injectors, z32afm, hks cams and rocker stoppers.
    251rwKw @ 18psi on a dynodynamics roller. Trust me, 170fwhp is nothing compared to 335rwhp! but i still miss my exa!


  6. #6
    First Time Poster Deluxesentra is very helpful round here
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    Hi to everyone!

    I hope is not too late to get some info regarding this particular set up since I've been having so many troubles with my car.

    Maybe this is not the right forum to ask since I have an 87 sentra but since it has the same engine as the EXA/NX models.

    I live in Guatemala and here we have limited resources as well as knowledge regarding webers and distributors so I decided to get a piece of advice from you guys. And it will be very appreciated. My car has the E16(S) engine which has computer controlled carb and distributor (correct me if I'm wrong). Its my daily driver car. As the time pass by things are getting older and so is my ride. Last year I started to have problems with cold starting ( I still have this problem), car car suddenly dies etc, etc. So I decided to get the weber kit 34/36 and resolve my problem.

    So far I have the weber kit, the distributor from an 83 model, I also saw at my friends house crane XR700 optical electronic points conversion (which I'm not sure will work with the 83 model dizzy), a blue bosch coil, 8mm wires and NGK plugs. What I'm missing now is that sensor you guys mentioned previously. I'm lost. Please help.

  7. #7
    Regular pulsar38501 has disabled reputation pulsar38501's Avatar
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    Sorry I haven't been back on in a while - the year went by fast, and things are just now getting settled down a bit.

    Just so you know, we took the Pulsar mini-stock car to Fairgrounds Speedway Nashville, ran the entire season (seven races), and finished sixth in points for the year. We didn't win any races (due to improper gearing, but we were limited by what we could get for a final drive!), but we were consistant and didn't have any DNF's! That says something for the NXA's and race prep as opposed to the cars that were fast and breaking every weekend!

    To "Deluxesentra" - you don't need to worry about the throttle position sensor if you have the '83 distributor with the vaccum advance. Nor do you need the optical trigger system. The stock distributor is good for around 10,000 rpm, so you shouldn't have any problems with it. The system is very easy to wire up, and if you need some help PM me and I'll give you a hand.

    The 38/38 Weber worked as advertised all year, and the car had plenty of power once it got on the cam. We had to figure out what jetting was required for the mains, and after some experimentation we finally got it dialed in. Got some great in-car video from the season on my YouTube channel. If you'd like to see them , you can check them out here:

    http://www.youtube.com/user/nissanguy38501

    Hope everybody has a great Christmas. Happy Holidays!!

  8. #8
    where can i get all the stuff to do this modification to my car?

  9. #9
    Regular pulsar38501 has disabled reputation pulsar38501's Avatar
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    Try Redline Weber....http://www.redlineweber.com/

  10. #10
    Thnx

  11. #11
    im having a little trouble here can anyone tell me witch one do i buy and how to order

  12. #12
    Regular pulsar38501 has disabled reputation pulsar38501's Avatar
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    You want the K 662 kit. The other kit should only be used for all-out racing. You may have to buy a set of "numbered" drill bits that go from 1 to 60 and a soldering gun so that you can fine-tune the main jets in the carb if needed. Usually these carbs ship with the jets calibrated pretty close to what the car will need. I think you have to call Redline to order, but the call is toll free. Make sure you get a new fuel filter to go with the kit!!

  13. #13
    ..
    Last edited by 85PulsarNx; 14th March 2013 at 01:05 AM.

  14. #14
    I just picked up a weber 32/36 that I plan to install on my vb11 van (e15). I'm having trouble sourcing an adaptor plate and was wondering if someone could help me out.

    Can someone please measure the stud spacing on the stock hitachi carb for me? That would be so helpful.

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