jitenshakun Posted May 28, 2020 Author Share #13 Posted May 28, 2020 A more experienced Z owner than I checked them and his conclusion was that if anything the jets might be a bit lean. I don't have them handy but I'll post them up later. Link to comment Share on other sites More sharing options...
jonbill Posted May 28, 2020 Share #14 Posted May 28, 2020 Are the jets stacks all the same then for 5 as for the other cylinders? I don't think the linkage can make #5 alone rich. It has to be something unique to #5. its jets, tubes, air bleed, cylinder rings, valves, throttle plate etc. Link to comment Share on other sites More sharing options...
jitenshakun Posted May 28, 2020 Author Share #15 Posted May 28, 2020 Jets were the same. The idle screw had a sticky point and may not have been the same. Fingers crossed the reset might do it. I'm a bit unable to test right now as my fuel pump just died. Parts are on the way. Link to comment Share on other sites More sharing options...
jitenshakun Posted May 30, 2020 Author Share #16 Posted May 30, 2020 Jets are all the same.Main jet 135Maim air corrector 165Emulsion F15Access pump jet 45Aux 55F8Sent from my SM-G950W using Tapatalk Link to comment Share on other sites More sharing options...
jonbill Posted May 30, 2020 Share #17 Posted May 30, 2020 and the idle jets too? much of the part throttle running is on the idles, not the mains. Link to comment Share on other sites More sharing options...
Patcon Posted May 30, 2020 Share #18 Posted May 30, 2020 Another thing to consider is internal damage If you crank the idle jets down too hard you open the idle orifice which makes it hard to adjust the carb. An O2 sensor would help but only if you can isolate it properly Link to comment Share on other sites More sharing options...
jitenshakun Posted May 30, 2020 Author Share #19 Posted May 30, 2020 The visual inspection of the jets is that they look good. Fuel pump is fixed and I'll see how the idle adjustment and some fuel cleaner do. Sent from my SM-G950W using Tapatalk Link to comment Share on other sites More sharing options...
jitenshakun Posted September 23, 2020 Author Share #20 Posted September 23, 2020 Bit of an update. I figure the PO set up the carbs based on the picture below. I added in a wideband and nailed down that the carbs were pig rich everywhere with a really lean acceleration.I've leaned out idle jets, main jets, and idle mixture. The next step is to bump up acceleration, followed by narrowing the emulsion tube.I also learned my engine is a recently rebuilt stock bottom end (l28) with a stock e88 (l24) head.Sent from my SM-G981W using Tapatalk 1 Link to comment Share on other sites More sharing options...
jitenshakun Posted October 12, 2020 Author Share #21 Posted October 12, 2020 Here's what I've landed on for my L28/e88 with DCOE 42: Choke 32mm2nd vent 3.5Main 135Emulsion F7Air 165Idle 55F13Pump 401.5" air hornsElevation 3,500' I have no hesitations across all types of acceleration conditions. My most problematic condition (slow acceleration off idle jet) is now a "spike" in AFR to 15. Previously it was to +20. My cruising idle is a bit rich (11 AFR) but compared to all the +/- I did it's the best of the tradeoffs across jet combinations. The single biggest change was going to the F7 emulsion tube, which didn't show up in any Z tips. It came from Des Hammill as a "will work with most applications" statement. I haven't put it on a dyno, nor do I plan to. I had a car that could barely get up hills and was terrible out of corners while daily driving. I know have a car that snaps whenever I accelerate, pulls all the way at WOT, and has AFRs between 11 and 15 the whole time. Pretty happy as a first time Weber tuner. Link to comment Share on other sites More sharing options...
jonbill Posted October 12, 2020 Share #22 Posted October 12, 2020 I'm glad you've got it sorted. Link to comment Share on other sites More sharing options...
jitenshakun Posted October 12, 2020 Author Share #23 Posted October 12, 2020 I'm glad you've got it sorted.Thank you.Sent from my SM-G981W using Tapatalk Link to comment Share on other sites More sharing options...
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