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#1 |
Registered User
Join Date: Feb 2009
Location: Charlotte, NC
Posts: 144
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Too Rich: SBC 670 Holley Street Avenger
Hey, all.
I have a 360ci SBC with an Edelbrock top end kit #2022. Compression ratio is about 10:1. 93 octane fuel with Stabil left over from winter storage. http://www.jegs.com/i/Edelbrock/350/...FcURMwod_xwA4A I have the timing set to 12* BTDC at idle and 36* of Mechanical timing ~2,500 RPM (Vacuum advance disconnected & plugged). I installed a fresh set of spark plugs gaped to about .040" and within about 20 min of idling the truck wouldn't idle any more because the plugs were fouled out. I was getting between 5" and 10" of Hg at idle and I know it should be higher than that. A knowledgeable buddy of mine suggested it could be the Power Valve (PV) or my floats are set too high. I think my floats are ok as the the fuel level is just below the threads, from what I can see. As anyone had any issues like this? Thank you. Kindest Regards, c10seth |
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#2 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,602
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Re: Too Rich: SBC 670 Holley Street Avenger
Hook your vac advance up to manifold vacuum, your idle and vacuum will come up, turn down your idle and adjust your mixture screws. Presently you're likely idling on the power circuit and with a low vacuum your power valve could be opening.
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#3 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Too Rich: SBC 670 Holley Street Avenger
make sure your choke is not stuck closed
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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#4 |
Registered User
![]() Join Date: Jul 2012
Location: White Salmon, WA
Posts: 263
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Re: Too Rich: SBC 670 Holley Street Avenger
Both good suggestions. Your vacuum definately should be higher with that setup, idle in gear with say around 14". What is your idle speed?
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#5 | ||
Registered User
Join Date: Feb 2009
Location: Charlotte, NC
Posts: 144
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Re: Too Rich: SBC 670 Holley Street Avenger
Quote:
![]() Electric choke seems to be opening and closing fine, but I'll keep a close eye on it. Quote:
Thank you all, c10seth |
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#6 |
Registered User
Join Date: Feb 2009
Location: Charlotte, NC
Posts: 144
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Re: Too Rich: SBC 670 Holley Street Avenger
Hey, all.
I reconnected the vacuum line for the dizzy advance, threw in a new set of plugs, and wow. That made a huge difference. I was getting about 20inHg and she stopped belching black smoke. I didn't realize that was that big of a deal with this Holley 670. Thank you for your help ^_^ Seth |
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#7 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Too Rich: SBC 670 Holley Street Avenger
Funny it turns out to be a distributor issue , when all indications would point towards the carb
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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670, float, holley, power valve, too rich |
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