 First days with an AEM AFR guage installed, Hmmmm.... rich at cruise? |
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| Gint |
 Nov 26 2012, 05:43 PM
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Mike Ginter  Group: Admin Posts: 16,096 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains   |
Running pretty good. It could be leaner, but it's not horrible for a pair of carbs that sat for well over a year and a half without a rebuild. I'm getting anywhere between 12 and 13.7 to 1 when I'm getting on it. Goes a lean for a second during transition from idle to mains. I'll work that out eventually. About what I expected. Not perfect, but that was the point of installing the gauge and getting a baseline before I touched anything. The gauge does tend to fluctuate quite a bit. Even at steady state throttle/speed/grade/etc...
What's weird to my mind is that it goes stupid rich at cruise. I expected it to lean out some. Trailing throttle cruise sometimes goes as low as 10.5 briefly, usually around 11:1 though. It will go up sometimes as high as 12 at slight throttle cruise, but I expected that to be leaner as well. Thoughts? 2.0 with about 10K on a local rebuild, 10 years ago. It's the 4 from Scott's Martini car. Stock build, pistons, cam, everything stock based on the receipt from the build. Dual Weber 40IDF's that sat for almost two years before this engine fired again this last time. I haven't rebuilt them yet. I have new jets and 32mm vents from ACE. I want to baseline what I have now, rebuild, adjust, baseline and then re-jet and check it out again. I want to see the effects of the changes as I do them. Carbs now: 60 idles 115 mains F11 2.0 AC 28mm Vent |
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| Mark Henry |
Nov 26 2012, 06:32 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Post all the specs on the carbs and engine
carb size Main Venturis Main Jets Idle Jets Emulsion Tubes Air Correctors - Main circuit air correctors - Progression Circuit |
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| Gint |
Nov 26 2012, 07:54 PM
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Mike Ginter Group: Admin Posts: 16,096 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
QUOTE(Mark Henry @ Nov 26 2012, 05:32 PM)  Post all the specs on the carbs and engine carb size Main Venturis Main Jets Idle Jets Emulsion Tubes Air Correctors - Main circuit air correctors - Progression Circuit 2.0 with about 10K on a local rebuild, 10 years ago. It's the 4 from Scott's Martini car. Stock build, pistons, cam, everything stock based on the receipt from the build. Dual Weber 40IDF's that sat for almost two years before this engine fired again this last time. I haven't rebuilt them yet. I have new jets and 32mm vents from ACE. I want to baseline what I have now, rebuild, adjust, baseline and then re-jet and check it out again. I want to see the effects of the changes as I do them. Carbs now: 60 idles 115 mains F11 2.0 AC 28mm Vent |
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Posts in this topic
Gint First days with an AEM AFR guage installed Nov 26 2012, 05:43 PM
Gint BTW, I bought the AEM wideband AFR gauge setup fro... Nov 26 2012, 05:59 PM michael7810 I have the same problem. From a small load to ped... Nov 26 2012, 07:01 PM
Gint
When at cruise with no hills it's good above ... Nov 26 2012, 08:07 PM wndsrfr
What's weird to my mind is that it goes stup... Nov 26 2012, 07:06 PM Gint
What's weird to my mind is that it goes stu... Nov 26 2012, 08:03 PM LotusJoe You might check out the information on this site.
... Nov 26 2012, 07:26 PM McMark If your venturis are too small, you'll get int... Nov 26 2012, 09:24 PM Trekkor I have the same a/f gauge.
13.1 at WOT under load... Nov 26 2012, 09:42 PM Gint I got some 32's from ACE. They'll go in a... Nov 26 2012, 11:21 PM ww914 Mike
I don't know if this will help you or no... Nov 28 2012, 08:54 AM bulitt Also, the lower the rpm the more retarded the igni... Nov 28 2012, 04:07 PM Gint Thanks Warren! That's cool.
Yeah, it occ... Nov 28 2012, 09:45 PM 72hardtop Your idle jet is to big. Drop to a 50 idle and adj... May 18 2014, 12:55 PM stugray Here is an interesting way to view data:
http://d... May 18 2014, 11:17 PM |
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