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    Thread: FAQ - Carbs

    1. Member PNW_Dubbin_Ain't_Easy's Avatar
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      05-25-2007 10:44 AM #101
      ya if you could post another pic or 2 of the set up that would be great and thanks for the choke question. now if I could get the damn thing to turn over i'd throw a party!!!

    2. Banned Mike Ngo's Avatar
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      06-12-2007 10:03 AM #102
      Quote, originally posted by SilverSLine »
      Thanks for the info. I have a 91 and am trying to eliminate the Motronic harness and ECM. Do any years have ICM's that plug directly into the distributor? I want to keep it as simple as possible.

      any answers?

    3. Member Cynical 1's Avatar
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      06-13-2007 06:21 PM #103
      my 81 rocco has a direct-to-distributor icm. may try that model.

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      07-03-2007 01:40 PM #104
      Running a 2L 16V with dual weber 45's and have the carter pump. Which fuel filter should I run? I've heard of a 3 port filter than I can run the nipple on the tank that was for the return line to instead of capping off that nipple.

    5. 07-04-2007 02:21 AM #105
      what about blockin off the frigin injectors how to?

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      07-04-2007 01:37 PM #106
      Quote, originally posted by OnTheRunDCI »
      Running a 2L 16V with dual weber 45's and have the carter pump. Which fuel filter should I run? I've heard of a 3 port filter than I can run the nipple on the tank that was for the return line to instead of capping off that nipple.

      I use a ~'89 Maxima fuel filter. It has 5/16 (8mm) nipples on both sides.
      '83 GTI 2L Dell 40's (crashed)
      '86 Cabby ABA/SDS - Bitch Basket
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    7. Member Cynical 1's Avatar
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      07-08-2007 07:49 PM #107
      Quote, originally posted by mofoco »
      what about blockin off the frigin injectors how to?

      cheap and dirty - use dimes and some high temp silicone in each injector port.
      or, go buy 4 trans drain plugs from the dealer and screw them in.

    8. Banned Mike Ngo's Avatar
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      07-27-2007 10:18 AM #108

    9. Member 6thGearGLIGuy's Avatar
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      07-28-2007 05:01 PM #109
      I got a couple questions about my carb set up
      -the carter 4070 pump i got didnt come with any wire harness, where can i get some wires that will hook up to the terminals on the pump?
      -I plan on running new fuel lines what size should i go?
      -I wanna run a fpr, how much pressure is good for dellorto 40s?
      Thanks very the help

    10. Member the12for12's Avatar
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      08-30-2007 05:33 PM #110
      Concerning Flat Slide Motorcycle carbs
      ......to be continued
      Quote, originally posted by Jeprli »
      Flat slide main jets only come into action at top quarter of throttle, midrange is controlled by the size and position of needle(you move a clip on the needle to a different position, upwards leaner, downwards richer, it basically controls when the main jet will kick in) and for first half of throttle it's all in the a/f mixture screw. If engine is running too rich with these carbs, it will bog down at lets say 4000rpm, if it's too lean it will let you know a lot sooner as it will have hard time starting. These type of carbs use very low fuel pressure as most are gravity fed so don't go crazy with pressure 2-3 psi the most. Oh and there is the float bowl which has a fork that controls these floats, you can bend that tab and allow more fuel into the bowl, but that is only for those who really know what they're doing. Also adding a little bit of high quality 2 stroke oil as a premix to your tank will keep flatslides smooth , and keep them from seizing(16:1-10:1 premix ratio). Balance and lighten your engines when using these as they rev up a lot quicker than fuel injected motor. These are practically impossible to synchronize, so the best you can do is have each one set exactly the same. I'll be doing this for my winter project, using a 2l aba motor with most probably yamaha R1 slides.

      All additional info IM the original quoter, Udig?

    11. 09-02-2007 03:42 AM #111
      yep we need more on bike carbs, I have two magazine articles that give an overview of the conversion, if someone could host them they could be put up for refrence....

    12. 09-07-2007 09:52 PM #112
      As for that premix ratio, use between 75:1 - 100:1. I made a mistake, sorry.

    13. Member the12for12's Avatar
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      09-09-2007 11:31 AM #113
      Quote, originally posted by chopWet »
      yep we need more on bike carbs, I have two magazine articles that give an overview of the conversion, if someone could host them they could be put up for refrence....





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    14. Member Big CADDY's Avatar
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      09-19-2007 08:19 PM #114
      wiring in a 8980 timing computer and a 6A or 6AL. using a VW ICM\




      Modified by Big CADDY at 10:14 PM 1-29-2009

    15. 09-20-2007 07:55 PM #115
      i have a 2L 8v counterflow (rv head) im gonna run sidedraft from a cbr 900rr any extra info would be wasome thanks my only main concern now is my ignition comes from my digifant box and i need to know how im gonna get my spark these setups appear to be for a cis or cis-e box help on ignition


      Modified by bradford_ramage at 8:44 PM 9-21-2007

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      10-11-2007 02:21 AM #116
      okay, lets take this to the top with some real crazy idea's
      I have recently acquired a mk2 8v along with a dual 40mm mukini carb setup and cam.... I really want to run nitrous with that setup and don't even know where to start.
      12for12
      I'm gonna need ur help on the carb side of this from A to Z, its gonna be rather ground breaking and a spare 8v motor has been donated for the cause to see what this will produce. I have some help from experienced tech's awaiting the neccessary info to install the carb setup. Just lay it out here for them and we'll be testing the nitrous grounds shortly there after.
      Yes I said nitrous, everyone can keep their negative comments to themselves.


      Modified by GermanRob at 11:22 PM 10-10-2007

    17. Member Big CADDY's Avatar
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      10-11-2007 08:13 AM #117
      I too have a nitrous setup I was thinking of putting on mine.

    18. Member jetta1986's Avatar
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      11-26-2007 07:34 PM #118
      hey guys does any one here know how to tune a set of Dellorto 40mm carbs ive got em on a 2.0 x flow it rips all the way till 4th gear and after that it wants to almost die out

    19. 12-19-2007 01:38 AM #119
      can the car run with the stock bosh coil, dizzy and no msd or ICM?

    20. Member Big CADDY's Avatar
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      12-19-2007 02:25 PM #120
      no. but wiring in a ICM is simple.

    21. 01-10-2008 02:23 AM #121
      I have a 92 16v gti. And a pair of 45dcoe's, now since i have no ignition control unit. Can i just use a MSD6AL with my factory computer and Dizzy? Or will this not work? And what size fuel line are you using from the pump to the front?


      Modified by DriVeWaY2L16V at 1:49 AM 1-11-2008

    22. Member Big CADDY's Avatar
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      01-10-2008 10:29 PM #122
      you can use one of the existing lines for fuel, swap out fuel pumps, run a regulator and filter and your good to go. no return needed with 4psi
      use the factory dizzy and a MSD 6A or 6AL. you can add the 8990 timing computer for more advance also. the diagrams are above. The ignition control units are a dime a dozen in junk yards.

    23. 01-11-2008 01:37 AM #123
      Do i need to wire the Hal sender on the ICM to the one on my Dizzy or anything ? Or do i just add the ICM and i'm good.

    24. Member Big CADDY's Avatar
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      01-12-2008 10:25 PM #124
      just use the wiring diagram above. pretty simple.

    25. 01-25-2008 07:37 PM #125
      does the ICM need to be ground it it self to the body or could it be mounted anywere? (it's usually mounted on that alum bracket to a metal bracket)

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