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11-12-2014, 01:33 PM
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#76 |
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Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: Exhaust backfiring
I'm not talking about the idle mixture. The carb has four circuits, the idle circuit, the cruise (primary) circuit, the power circuit, and the secondary circuit. The middle two of these are richer than a cob or you wouldn't be getting such terrible gas mileage. The adjustments required are made, according to the manual, by modifications to the PRIMARY METERING JET. SECONDARY METERING PLATE, PUMP DISCHARGE NOZZLE, PRIMARY POWER VALVE, SECONDARY DIAPHRAGM SPRING. These modifications are most easily done with an accurate A/FR meter.
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Rich Weyand 1978 K10 RCSB DD. |
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11-12-2014, 04:48 PM
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#77 |
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Registered User
Join Date: Aug 2014
Location: Frederick md
Posts: 178
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Re: Exhaust backfiring
Ok now I understand I've really never messed with carbs before i'll get a meter
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11-12-2014, 04:50 PM
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#78 |
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Registered User
Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: Exhaust backfiring
Also, if you google the mfr and model number for the carb plus the word "manual", you can download the manual for that carb.
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Rich Weyand 1978 K10 RCSB DD. |
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11-12-2014, 09:25 PM
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#79 |
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Registered User
Join Date: Aug 2014
Location: Frederick md
Posts: 178
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Re: Exhaust backfiring
I talked to my buddy who tuned the carb and both the idle and intermediate circuit are if anything on the lean side. I'm going to run this tank out and see what's up this wi be the first tank since everything has been done to it
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11-18-2014, 10:10 AM
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#80 |
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Registered User
Join Date: Aug 2014
Location: Frederick md
Posts: 178
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Re: Exhaust backfiring
I finally bought an afr meter it's an aem wide band should be here tomorrow
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