40DCOE SSD on a 2.0 Jetting - Page 7
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Thread: 40DCOE SSD on a 2.0 Jetting

  1. #121
    Opeler SpringGT's Avatar
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    Quote Originally Posted by Knorm65 View Post
    Yes I was thinking the same thing. I’ll have to make it though. It doesn’t look like anyone has made one. Probably not many cars with a racing carb and ac lol.


    Sent from my iPhone using Tapatalk
    How about a vacuum cut off switch for the compressor clutch. It cuts the ac off when under load / passing, etc.

    https://www.youtube.com/watch?v=C3Pyek_8FC4


    https://rover.ebay.com/rover/1/711-1...SABEgJtuPD_BwE
    Last edited by SpringGT; 08-31-2018 at 03:11 AM.

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  3. #122
    Can Opeler Knorm65's Avatar
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    40DCOE SSD on a 2.0 Jetting

    Just a little check in. Since the last post I sourced a larger accelerator pump jet. Must suppliers only sell up to 60 and my drill set doesnít have the right size to drill one out so I found a 70 pump jet. All hesitation is completely gone. It drives better than a Weber 32/36 and has much better power and response. I also went one size richer on the mains and 2 sizes richer on the air jets.

    All semblance of fuel efficiency is now gone, but Iím getting perfect 12.5 AFR at WOT across the power band. At highway cruise itís a bit too rich at about 11.8-12.5 AFR, but itís worth it for the amazing top end performance. My MPG this week was 16.5MPG lol. But that includes 2 autocross events and going 90 on the highway for 50 miles.

    Iím still fighting issues with idle jets occasionally getting clogged after very spirited acceleration and cornering. I might know what is going on though. My air filter doesnít cover up the fuel bowl vent. I pulled a piece of grass out of my idle jet the other day. The only way that could possibly get there is through that vent. I might make some kind of brass filter or something to thread in that 1/2Ē vent hole
    Last edited by Knorm65; 1 Week Ago at 01:09 PM.
    "Mira," 1970 Opel GT Working ARA AC, European 2.0L and Midikit
    "Kara," 1972 Opel GT Targa, Welded Doors, Rhinolined

  4. #123
    3000 Post Club norbertone.gt371's Avatar
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    Wow
    that sounds more like a Commodore GS,not the room but the thirst
    Knorm65 likes this.

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  6. #124
    Can Opeler Knorm65's Avatar
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    Quote Originally Posted by norbertone.gt371 View Post
    Wow
    that sounds more like a Commodore GS,not the room but the thirst
    Sheís a thirsty girl! I usually get around 18MPG though. I could probably get 20 if I drove the speed limit, but thereís no fun in that!
    "Mira," 1970 Opel GT Working ARA AC, European 2.0L and Midikit
    "Kara," 1972 Opel GT Targa, Welded Doors, Rhinolined

  7. #125
    Opeler SpringGT's Avatar
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    Quote Originally Posted by Knorm65 View Post
    All semblance of fuel efficiency is now gone, but Iím getting perfect 12.5 AFR at WOT across the power band. At highway cruise itís a bit too rich at about 11.8-12.5 AFR, but itís worth it for the amazing top end performance. My MPG this week was 16.5MPG lol. But that includes 2 autocross events and going 90 on the highway for 50 miles.
    It is too bad that you can't get adjustable jets so that you could lean out your cruise mixture like with an aircraft engine. With an AFR meter and an adjustable jet you could really fine tune your fuel consumption going down the highway. Wishful thinking!

  8. #126
    Can Opeler Knorm65's Avatar
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    Quote Originally Posted by SpringGT View Post
    It is too bad that you can't get adjustable jets so that you could lean out your cruise mixture like with an aircraft engine. With an AFR meter and an adjustable jet you could really fine tune your fuel consumption going down the highway. Wishful thinking!
    Man that would be cool! Although I am runing rich enough to possibly run a tiny bit of boost and that would lean things out a bit.

    I could lean out highway cruise by drilling a couple holes in the transition are by the throttle plates or by using something called a Venturi fountain tube that the DCOE tuning group came up with.
    I just havenít gotten around to messing with it. Iím fine with my average 18mpg. Still better than my 2018 truck.
    "Mira," 1970 Opel GT Working ARA AC, European 2.0L and Midikit
    "Kara," 1972 Opel GT Targa, Welded Doors, Rhinolined

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