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10-07-2004, 02:06 PM
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#1 |
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Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
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Detonation
I thought I heard detonation pinging at about 4000 rpm but I can only hear it with the window open. And after hearing it a few times I think it might be just something rattleing(exhuast or something). I can not hear it with window up?
Thanks for any reply
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1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
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10-07-2004, 08:54 PM
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#2 |
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Stepsides RULE
Join Date: Jul 2004
Location: Pineville, LA
Posts: 1,921
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valves? If its hot and your city driving, your valves might ping from loose / funky timing, poor gasoline, or just a high ambient temp. Just throwin something out.
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1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord |
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10-08-2004, 12:38 AM
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#3 |
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Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
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I ran into several detonation problems on my 75. I ws running the stock very restrictive air cleaner that had no snorkle. I flipped the lid to remove the restriction and improvement but still sucking hot under hood air and still getting detonation when pull steep grades at hwy speeds. Funny thing is even in 75 there knockout existed for a snorkle. Go figure. So I slapped a stock 85 air cleaner on with snorkle. Problem much better.
I later found that the wrong down shift cable was installed for my TH 350 and it was locking out the 4bbl. 
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Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
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10-08-2004, 04:38 PM
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#4 |
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Stepsides RULE
Join Date: Jul 2004
Location: Pineville, LA
Posts: 1,921
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Over the summer, back in July i think, i went to the dealership and got the fresh air duct (that is the official name), as mine had been missing. A lot of people say its not a crucial piece of the puzzle, but if it came with one it was designed to run with it, therefore you need it
 It definately made a difference.
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1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord |
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