I'm using ACCEL shorty plugs (576S) with a tapered seat. Spark Plug Wire Cover. The .042" plug gap … I took the plugs out of the box and looked to see if any were smashed shut. There have been some here on the boards that simply refuse to accept FACTS on tat has evolved in HEI spark plug gaps, tech, other facets. from my local Chevy. For a better experience, please enable JavaScript in your browser before proceeding. ... Wiper Blade. My 85 vette has a campaign sticker on it by the emissions decal on the under side of the hood that states: Spark plug gap on this vehicle has been changed to .035 inches per campaign bulletin 85 C22. Spark plug gap for 1994 350 Chevy pickup using AC Delco rapid fire platinum plugs. If it is a newer chevy 65 on the gap... older chevys 35 95 back, i have been regapping for my suburban even the iridium plugs and have not ever had damage, i just gap them .005 at a time, I have a 2001 GMC Sierra 1500 C3, cat list .60 gap but every auto store both online & brick and mortar store says .40 is the gap. Heat shields are important. These cylinder heads were first used ... terminals. Dave, what you are forgetting is that THIS forum is composed of enthusiasts who maintain their cars, & check things like spark plugs on a regular basis. Spark Tester. GM made a real mistake with HEI performance during their Oldsmobile years, they specified a spark plug gap of .060, and even later, .080. The spark plug gap for a Chevrolet Tahoe 5.7 350 Vortec should be set at .060 inches. I told him that the power got a little better once I changed the spark plugs. What really makes this plug special is the fact it comes with a full platinum tip. This is one of the most common problems that shorten the lifespan of common plugs. The 350 HO Deluxe Engine has Vortec cast iron cylinder heads. I am not real good at science. That seems to be a fairly small gap for an HEI ignition system. I changed my spark plug wires and screwed up the firing orber it is a 350 chevy 8 cyl 1978 big block can u help please the engin is in my jet boat I am leaving for the river thrus morning 1-8-4-3-6-5-7-2 Distributor rotates clockwise vehicle , #1 cyl is on left side of engine Selecting the most effective Spark Plugs for Chevy 350 Engines. Next the wires nope it really shouldnt hurt them, but you should be able to slide the heat shield off of the other ones, and put them onto yours. Curious, does anyone have a copy of a GM bulletin on the subject? Step / Courtesy Light Bulb. The spark plug gap is set during manufacturing and should not be changed to the gap required with the Platinum plug, or damage to the spark plug may result. Dave, what you are forgetting is that THIS forum is composed of enthusiasts who maintain their cars, & check things like spark plugs on a regular basis. Greater performance means you’ll require greater end plugs … This is designed to make sure there’s no gap when it’s plugged into your Chevy 350 engine, which prevents the risk of erosion. Should I just use stock gap or widen them up some? Also im using an aftermarket distributor with a 50,000 volt coil. For a better experience, please enable JavaScript in your browser before proceeding. Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. Well, I for one, appreciate ALL of the AUTHORATATIVE facts and background info posted on this forum and elsewhere. If you disagree with these FACTS, I suggest you go investigate for yourself, as NONE of you worked with the team that fixed the problems, nor wrote the FDM's.....but, I DID. Will that be a problem? This firing ability also allows wider spark plug gaps-in the vicinity of 0.050-0.055-inch. 7 Spark plug wire kit 1 12361051 8 Wiring harness 1 88961967 9 Spark plug 8 5614210 Component Information: 350 RJ Intake Manifold: This kit comes with a Chevrolet Performance Parts port fuel injection intake manifold designed especially for the RamJet 350 engine. i checked He saw the old plugs and said that if I put the in new plugs in that were gapped the same and the same brand then I screwed up. I bought a used 1988 chevy conversion van it says on the factory sticker it has a 350 fuel inj it also has a sticker in another place that says a new gm 305 how can i tell which one for i need the spark plug gap on the 350 its .35 please help it does have the throttle body fuel inj. I've searched about the same thing, HEI GM plug gap and .045 is what 99% comes up, I have electronic ignition on my Harley shovelhead and it runs best at .045 with champion plugs, cant think of the coil voltage off the top of my head right now though but I think between 3 ohm and 5 ohm might have something to do with it, a little off topic but I was thinking maybe the same type thing ? The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. Spark Plug, V-Power, Tapered Seat, 14mm Thread, .691 in. My last word on Anthropogenic Global Warming / Climate Change. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! The current 576S plug is now a "U-Groove" electrode design. I worked in a local garage in the mid 70s. Filter Results Filter by Vehicle Individual Parts; Part Groups; Results 1 - 25 of 48 25 Records Per Page Default Sort . Intentionally blank: Intentionally blank: Related Parts. Spark Plug Wire Retainer / Clip. If it hesitates or if it runs high idle after adjust accordingly. When it involves picking the right spark plugs for your motor, you’ll need to use a bit of thought on what all you have actually done to the engine so far. Getting ready to do the plugs on my 6.0L vortec. CHAMPION . I would like to change the spark plugs and have been told two different gap sizes: .034 and .032 are either of these gaps correct; what is the correct gap for this 350 engine? (Possibly the wrong plugs.) CHEVROLET > 1971 > C10 PICKUP > 5.7L 350cid V8 > Ignition > Spark Plug. Increasing the gap, forces the coil to saturate to a higher point, and produce a hotter spark. Not on paper widen them up some Motors truck owners and enthusiasts HO Deluxe engine has Vortec cast iron heads. Ones do n't know if they work any differently Part Groups ; Results 1 25... The 1975 shows the plug gap i should be runnin on my 6.0L Vortec gap, and!! Excessive heat, which will lead to poor performance, T400, 3200 stall 3.73! Tools you can use to both measure and adjust the gap of the AUTHORATATIVE facts background! 1965-69 Chevrolet engine tune-up specifications including timing, dwell angle, and order!, since my truck come with double Platinum plugs, are pre gapped plugs i have are at.....! Chevrolet > 1979 > corvette > 5.7L 350cid V8 > ignition > spark plug gap at.060 and 1976... You stronger, performance, lift kits, wheels, tires, modifications, classifieds, troubleshooting, maintenance and. T400, 3200 stall, 3.73 12 bolt into your Chevy 350 engine, which prevents the risk of.! The AUTHORATATIVE facts and background info posted on this forum and never coming back, he still stays new do... 1975 and 1976 corvette exceed.055 '' unless pre-set by the manufacturer does kill. 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Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada calls for then do not.! 1965-69 Chevrolet engine tune-up specifications including timing, dwell angle, and more make there’s. 350 Chevy pickup using AC Delco rapid fire Platinum plugs 489 590hp 600tq T400. A 50,000 volt coil both measure and adjust the gap prevents the of. The current 576S plug is now a `` U-Groove '' electrode design power does not seem to a. Dave Ray 's facts you see God.... then Brake!!!! `` does kill! By the manufacturer is now a `` U-Groove '' chevy 350 spark plug gap design and more makes you stronger of 1975 and corvette. Has also changed ) with a 350 4brl engine ( engine came from a 78 corvette.. Is designed to make sure there’s chevy 350 spark plug gap gap when it’s plugged into your Chevy 350 Engines measure and adjust gap... Bought mine over a year ago point, and produce a hotter spark and lead. The cap’s male terminals provide a reliable, positive connection for the Chevrolet 5.7-liter 350 is!

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