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04-07-2014, 11:52 AM
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#1 |
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Registered User
Join Date: Dec 2011
Location: Sapulpa, OK
Posts: 187
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Pinging 6
I can't figure out what I'm doing wrong...
Got a 235 with about 27k on it since rebuild, Fenton headers, Tom Langdon's HEI, and a 2-bbl Weber,3:38 rear end, granny 4 speed. I only run 91 octane gas. Truck runs great, but going up some hills at 50-60MPH, I get some pinging. It wasn't doing this 6 months ago - I've retarded the timing, but when I get it retarded enough to lose the uphill ping, it's too retarded to run at max efficiency. Spark plugs are toast brown, no other problems I know of. Reading Sharps40 disaster story kinda has me worried. Should I be? |
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04-07-2014, 12:43 PM
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#2 |
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Senior Member
 
Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: Pinging 6
Check advance weights and springs and see if they are working well. Also you could check the vacuum pot to see if it is returning correctly. If both of those look fine a lean condition will also cause detonation.
Jimmy
__________________
60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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04-07-2014, 12:50 PM
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#3 |
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Registered User
Join Date: Dec 2011
Location: Sapulpa, OK
Posts: 187
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Re: Pinging 6
I'll sure check that out, Thanks!
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04-07-2014, 01:03 PM
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#4 |
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Registered User
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: Pinging 6
You obviously have carb adjusted right...might consider richening it a tad. Sharp's issue was to much advance, to lean and not enough octane far as I can remember. Note..to much retarding can cause issues as well...8-10 degrees below TDC is a good setup I believe...I'm not a go pro on timing. lol
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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04-07-2014, 04:05 PM
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#5 |
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Registered User
Join Date: Dec 2011
Location: Sapulpa, OK
Posts: 187
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Re: Pinging 6
Thanks to y'all for the advice - will do as advised!
It is shore nice to have this wealth of info on the board. |
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04-14-2014, 07:19 AM
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#6 |
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Registered User
Join Date: Dec 2011
Location: Sapulpa, OK
Posts: 187
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Re: Pinging 6
I backed off the timing a bit, re-adjusted carb. Pinging quit, idles a bit different, but running strong. I had just listened to it to get best running, prob had it way too advanced. Got a 400 mile trip up into the Ozarks in a couple weeks, ought to see how it does on some real hills.
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04-14-2014, 10:26 AM
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#7 |
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Registered User
Join Date: Dec 2011
Location: Sapulpa, OK
Posts: 187
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Re: Pinging 6
good luck!
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04-14-2014, 11:12 AM
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#8 |
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Registered User
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: Pinging 6
Glad yer truck is running better...hope it pulls the hills better to.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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