 Dyno pull questions, Too Lean? |
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 Dec 7 2013, 07:03 PM
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Member  Group: Members Posts: 295 Joined: 6-August 11 From: Everett, Wa Member No.: 13,409 Region Association: Pacific Northwest  |
Hey all, took my '75 2.0 to a dynojet dyno last week to establish a baseline of sorts. Based on receipts from previous owners, I think it has Euro-spec Mahle p's and c's, a web-cam of unknown grind, to go with the dual webers she sports. Here were the results:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i219.photobucket.com-13409-1386464602.1.jpg) I paid for two runs, but the guy running the dyno said I was so lean he wasn't comfortable doing a second pull. The sheet shows it being right around 14-17:1 most of the pull, and richening up after 5k rpm. Is that not where I should be with this car? Also, the resistance of the dyno wheel exposed the ignition irregularities you see on the power graph, any suggestions on what that could be? I'm running a svda dizzy out of a 1.8 car, with pertronix, and the total advance set at about 28 @3500 RPM (I THINK, I can't remember exactly, it's been too long since I did it, lol). Thanks, as always! Chris |
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Posts in this topic
audio_file Dyno pull questions Dec 7 2013, 07:03 PM
Jake Raby Way too lean. So lean that it was breaking up and ... Dec 7 2013, 07:10 PM audio_file Thanks Jake! Guess I'll be finding a good ... Dec 7 2013, 07:20 PM rdauenhauer Nice! Who's chassis Dyno? Dec 7 2013, 07:21 PM
audio_file
Nice! Who's chassis Dyno?
Hey Rich! ... Dec 7 2013, 07:24 PM Jake Raby If you just pulled it a couple of times you'll... Dec 7 2013, 07:29 PM audio_file
If you just pulled it a couple of times you'l... Dec 7 2013, 07:33 PM Jake Raby The street will take much longer to kill it than t... Dec 7 2013, 07:47 PM audio_file
The street will take much longer to kill it than ... Dec 7 2013, 07:51 PM Jake Raby Then thats where part of the lean condition may co... Dec 7 2013, 07:57 PM messix was Cam running the dyno?
they're good guys u... Dec 7 2013, 08:02 PM audio_file Ok, any other way to check for exhaust leaks besid... Dec 7 2013, 08:11 PM r_towle Cover the tailpipe (s) with a piece of wood while ... Dec 7 2013, 08:22 PM gothspeed +1 ....... right where that dashed line is where t... Dec 7 2013, 08:39 PM  |
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