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    Thread: The all carb diet.

    1. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      07-31-2008 12:18 PM #101
      Same here!
      I wasn't referring to maximum torque in my above post, more like a solid flat curve that trades the most torque at one peak for the best compromise between that and a flat curve. So, instead of having a torque peak of say 3700, and 100ft/lbs, I'd be tuning via ignition timing to hit a torque peak of 2500-3500 with 85ft/lbs.
      1987 GTI 16v, no build thread.

    2. 07-31-2008 04:05 PM #102
      I feel ya, my torque peaks at almost 5500, so I'm out of that conversation

    3. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-01-2008 08:02 AM #103
      Fiddled with the car last night, out of boredom. Put a stronger throttle return spring on, MUCH better now. Reset the timing too, for ishts and giggles. I still can't get over how smooth the car idles with the Jacobs ignition...even at 15:1 under warmup conditions (no choke used).
      T-minus 4 days until I can legally drive the thing....
      1987 GTI 16v, no build thread.

    4. Member WhiteG60's Avatar
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      1980 VW Scirocco, 2004 Audi A6 S-Line 2.7T
      08-01-2008 08:26 AM #104
      Quote, originally posted by B4S »
      Fiddled with the car last night, out of boredom. Put a stronger throttle return spring on, MUCH better now. Reset the timing too, for ishts and giggles. I still can't get over how smooth the car idles with the Jacobs ignition...even at 15:1 under warmup conditions (no choke used).
      T-minus 4 days until I can legally drive the thing....

      What ignition did you have before? Stock?

    5. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-01-2008 09:00 AM #105
      Yep, plain jane ol' CIS-E 8v knockbox setup. It's still there (obviously), just now being amplified by the Jacobs stuff.
      1987 GTI 16v, no build thread.

    6. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-01-2008 07:07 PM #106
      My Rowland single sidedraft manifold is at the post office, awaiting my arrival tomorrow morning .
      Now...run the duals for the summer and make it to the show next weekend, or swap it all out and hope it goes smoothly?
      I won't be able to sleep tonight!
      1987 GTI 16v, no build thread.

    7. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-02-2008 11:57 AM #107
      A package from South Africa arrived yesterday...






      I can't say enough good things about Rowland Manifolds in SA, the customer service is top notch, and it arrived in 8 days. After a local show next weekend I'll be swapping to a single carb...mainly because I can't leave well enough alone (and I happen to have a set of Mikuni sidedrafts just sitting around doing nothing) .
      1987 GTI 16v, no build thread.

    8. 08-03-2008 02:00 AM #108
      Am I seeing only one port for vacuum on that new manifold? Any plans to change and/or correct that? Best of luck with it either way. [IMG]http://**********************/smile/emthup.gif[/IMG]

    9. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-03-2008 08:53 AM #109
      I plan on drilling out that port, as well as drilling the second barrel. I'll use an NPT thread tap, to make it easier to find fittings. I'm going to run both ports to the brake booster, since I don't need more than one vacuum line (CIS-E knockbox) and the check valve on the brake booster line provides that. When I swap to the above manifold, I'm removing the knockbox and planning on setting up a Megasquirt as an ignition controller.
      1987 GTI 16v, no build thread.

    10. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-03-2008 08:31 PM #110
      1987 GTI 16v, no build thread.

    11. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-03-2008 09:13 PM #111
      Oh, also upped the idles to 65 from 58 (damned emissions carbs) and moved to 190 airs. The main circuit was coming in too early and making my cruise AFR a bit too rich, but the larger airs will hopefully take care of that. Also, it needs leaning out up top, I'm at about 12:1 at WOT. Outside of that, I think I'm good to go with the jetting...for now .
      130 mains
      190 airs
      65 idles
      32 chokes
      42 pumps (might need to go larger on these)
      1987 GTI 16v, no build thread.

    12. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-07-2008 08:32 PM #112
      LOL!
      Well...turns out you really should DRIVE the car before settling on the jetting. I had no choice but to drive the car to the glass shop for the new windshield since the installer couldn't get it in ( ), and it was a 15 minute jaunt from my place along country roads. Even though I was barely able to see through the spiderwebbed glass in my car, I had a chance to watch the wideband...and it's rich (11-12:1) under 2200, and less rich (13-14:1) above 2200. So I'm assuming then that the mains kick in somewhere around there, and that the idles are faaaaaaaaaaaaar too big. I've still got some tuning to do, obviously, but I think it's close. I'm going to swap the idles back to the 58s that were in there originally, and see what happens. My main circuit seems to be pretty good, I'd prefer a leaner cruise, but I'll take what I can get that'll still leave me with a 13:1 WOT reading.
      (Oh yeah, got my 45 & 50 Mikuni pump jets, and a 1.8 needle, for the single carb setup. Big [IMG]http://**********************/smile/emthup.gif[/IMG] to Todd at Wolf Creek Racing)


      Modified by B4S at 8:33 PM 8-7-2008
      1987 GTI 16v, no build thread.

    13. 08-07-2008 08:51 PM #113
      ok im planning on running a single carb like you b4s. here it is.
      todd hooked me up with a lot of jets to help my tunning i would like to know what ends up working best.
      and here is my ? can i set up my stock ignition to run with a carb?

    14. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-07-2008 09:32 PM #114
      Well, it would help to know what your stock ignition is .
      MkI, MkII, MkIII?
      If it is an 81 caddy like in your profile, then it'll have a vac advance dizzy if it is stock. You can run your stock ignition for sure, but you'll lose the benefit of the vac advance, unless that vacuum port on your mikuni is ported vacuum and not manifold vacuum. I think it's ported...but not sure. If it is, then you can hook up your dizzy vacuum line to it. The spark will fire off fine, but a hotter ignition will help a lot.
      1987 GTI 16v, no build thread.

    15. 08-08-2008 04:34 AM #115
      yes it is a vac port. ill get a new coil asap.

    16. Member WhiteG60's Avatar
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      1980 VW Scirocco, 2004 Audi A6 S-Line 2.7T
      08-08-2008 08:54 AM #116
      Whats everyone's opinion Solex carbs? I have a CRAZY deal on 2 barely used 40mm side draft solex's on a manifold with a pretty killer linkage for $200. They were on a 1.6L Scirocco that dynoed over 130whp.

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      79 rabbit
      08-08-2008 09:05 AM #117
      b4s- those 65 idle jets are way fat. you shoudnt need bigger than a 55

    18. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-08-2008 09:10 AM #118
      Yeah, I learned that one the hard (and expensive) way, lol. Mine are emissions carbs, with a pre-drilled idle bleed though that is the equivalent of a 220 air on the idle side, as well as 5 very large progression holes. I'm going to try the 58s first, then test out the 52s or 46s I have. My hands are tied right now, since the car isn't with me, but tonight I'll HOPEFULLY have some more info. I'm going to order a megasquirt over the winter, so that I can run a mappable ignition and datalog everything . The carbs are staying though (or carb, depending on how it goes).
      1987 GTI 16v, no build thread.

    19. Member impulse byer's Avatar
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      98 5.9 Grand cherokee, VW other again...
      08-08-2008 10:24 AM #119
      Look's good B4S If you want to get rid of one of the counterflow mani's LMK
      Mine 2.0L 16V duel 40's mm's, mild head work, stock block (280km's ) 150whp and can daliy it all you want with great gas mileage spring to fall


      and a vid...
      http://www.youtube.com/watch?v=OuY6wXW7ZU0
      I think i will go and put in my other set of cams just for fun Thats the only think i miss with carbs lumpy idle with big cams This thing idles smooth at 900-1000rpm with 276 shrick's. Oh well the 283/279 Cats might bring it back a little. :
      Quote Originally Posted by prasina2 View Post
      I thought the steps were:
      1. Buy car you're unfamiliar with 2. Buy turbo, having no knowledge of turbos or cars 3. Buy bolts and bolt on turbo 4. Tow-truck drivers and mechanics profit.
      Did I miss anything?

    20. Member Shawn B's Avatar
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      1984 GTI
      08-10-2008 04:29 AM #120
      Not mine but the owner is part of our club:

    21. Member WhiteG60's Avatar
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      1980 VW Scirocco, 2004 Audi A6 S-Line 2.7T
      08-10-2008 04:35 PM #121
      Just got my dell's all done and rebuilt.
      None done:

      One done:

      All done:

      Just need to get new idle mixture screws.

    22. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-10-2008 05:18 PM #122
      Mmmmm, delicious!
      1987 GTI 16v, no build thread.

    23. 08-10-2008 08:56 PM #123
      ill play. my baby dellorto FRD 34B's


    24. Member B4S's Avatar
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      2002 Forester S, 1987 GTI 16v
      08-10-2008 09:05 PM #124
      I saw that thread in the Mk1 forum...I love the idea of using alternate carbs. I'm going to try a set of S.U. carbs next .
      1987 GTI 16v, no build thread.

    25. 08-10-2008 10:36 PM #125
      haha thanks they run pretty damn good

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