240260280 Posted September 9, 2017 Share #121 Posted September 9, 2017 btw are all tests run with air filters either in place or removed? A partially restrictive air filter will have a choke effect and draw more fuel so if they are in place for one run but not for another, a change in AF may occur, Link to comment Share on other sites More sharing options...
blodi Posted September 9, 2017 Author Share #122 Posted September 9, 2017 Put in 165's. I kept the 230 airs. I'll report back tomorrow or Monday with a log. The AFR is 20.9 when I first plug in the Innovate and the car has been sitting for a day or more. So, that tells me it should be calibrated? Yes, all air filters are on and have stayed on through all testing. They are also brand new and should still be really clean. Link to comment Share on other sites More sharing options...
240260280 Posted September 9, 2017 Share #123 Posted September 9, 2017 (edited) Great. Thanks for reporting the details, it helps to rule out variables. No worries about the free-air calibration. It should be close. Still it is difficult to understand the cause of these occasional strange jumps in behaviour. Why the recent run has the rise in the middle part of the run is baffling. The larger air jet should have leaned the top end like the 238 but not as much. Maybe it is atmospherics as SweatyBetty suggested. I guess more testing is needed. It sure is iterative. Hopefully the new E tubes on the way will have different shapes with no hump in the middle. We could be simply battling an"F16"... and not the type that flies. Edited September 9, 2017 by 240260280 Link to comment Share on other sites More sharing options...
blodi Posted September 10, 2017 Author Share #124 Posted September 10, 2017 I agree...some odd results. I'm hoping one of the new e tubes flattens the curve. We've never been fully able to flatten it out other than when I put the 238 in. Link to comment Share on other sites More sharing options...
blodi Posted September 11, 2017 Author Share #125 Posted September 11, 2017 Tried to take logs yesterday....running into a new electrical issue all the sudden. AFRs' looked good up until about 5K (usual lean bump then hovering around 12.-7-12.9) The butt dyno suggested power felt really good. Then at ~5K the engine starts sputtering and the ignition fuse blows and the tach/center gauges all die. So...gotta figure that all out now. Link to comment Share on other sites More sharing options...
blodi Posted September 12, 2017 Author Share #126 Posted September 12, 2017 Also, the other E Tubes showed up today! But, until I get this electrical issue sorted...testing is gonna have to wait. Link to comment Share on other sites More sharing options...
240260280 Posted September 12, 2017 Share #127 Posted September 12, 2017 Murphy's law. Glad the e-tubes arrived. We will have great data soon! No need to rush... snow is still far away Link to comment Share on other sites More sharing options...
Duffman Posted September 12, 2017 Share #128 Posted September 12, 2017 (edited) I have finally got my triples dialed in on my 70 Z with rebuilt L28, stock cam and flat top pistons. Thanks, Blodi, for posting your experience, it helped me a lot! And a big thanks to 240260280 and Chickenman for all of their help over the last number of months, it helped make sense of these wonderful carbs! Weber DCOE 40 151 current specs: Venturis - 32 mm, auxiliary - 4.5 mm, float needle valve - 1.75 mm, idle jets - 50F9, main jets - 161 (drilled), air corrector jets - 200, pump jet - 50, pump exhaust - 00, emulsion tube - F16 I am running around 12.5 to 13.5 on acceleration, with 14.5 on highway cruise (with AFR gauge). Idles very smooth at 850, but could go lower if I wasn't running AC. Life is good ... Edited September 12, 2017 by duffman addition Link to comment Share on other sites More sharing options...
Patcon Posted September 12, 2017 Share #129 Posted September 12, 2017 5 minutes ago, duffman said: Life is good ... How far above sea level? Link to comment Share on other sites More sharing options...
Duffman Posted September 12, 2017 Share #130 Posted September 12, 2017 (edited) Phoenix, AZ, is about 1100 to 1200 ft above sea level. Edited September 12, 2017 by duffman Link to comment Share on other sites More sharing options...
blodi Posted September 13, 2017 Author Share #131 Posted September 13, 2017 Nice work duffman! I'd be curious how your afr curve looks. Do you have logging capability? Nice looking setup! Link to comment Share on other sites More sharing options...
Duffman Posted September 13, 2017 Share #132 Posted September 13, 2017 I don't have logging software to graph my results, unfortunately, but I did the same thing you did with consistent runs from 3000 to 5500 rpm on a flat road. I was getting solid readings on my gauge.Sent from my iPhone using Classic Zcar Club mobile 1 Link to comment Share on other sites More sharing options...
Wilbur
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