L48, 4spd. autokwix.com, All Rights Reserved. You will be able to find a high-quality plug for the 5.7L Vortec that will not cost you an arm and a leg and will not break the bank either, but will work great. 98 Votec 7.4L spark plug application. Most of Today's Spark plugs are Pre-Gapped right out of the Box,.....The Gap is 0.60 ... And if you are going with factory AC delco plugs which work well in the Vortec motor then absolutely be sure you check. Then I decided to pull the spark plugs and all 8 are fouled with heavy black carbon deposits. cam, 1.6 rockers, headers, eddy RPM manifold with a 4777 650 dbl pump 4.10's and a M20. Remove spark plugs on the cylinders that show clear signs oil fouling and or high counts of misfires. Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. What I have now are Autolite 145. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. Due to the iridium composite, it delivers excellent strength and a high melting point to your 5.3 Vortec engine. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). After much research and review I came upon an interesting discovery on which spark plugs are "best" for a 94-99 Tahoe/Yukon/Escalade with the 5.7L Vortec. Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. Messages: 5,602 Likes Received: 77. The best spark plugs for your 5.7L Vortec will actually have a Volvo logo on the plug. lmao. Bosch 9601 Double Iridium OE Replacement Spark Plugs get 4.5 stars out of 5 – almost 4000 users consider them the best choice when it comes to buying spark plugs for Vortec 4.8 engines. SERIES: K8. • A new spark plug has been released for use in the above vehicles. check out the. The most likely reason for the marine applications running copper plugs is that marine applications do not have to meet the same emissions standards as cars do and they also do not need to run extended tune-up intervals. In our cars a plain old spark plug is the best option. ENGINE CODE: L31 Vortec. Still nothing. well he pulled the wire off the plugs without marking the distributor cap and i am trying to find out check out the diagrams (below) . Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). The new spark plug has an Iridium tip instead of the current Platinum tip. ... " hole in the pipes before the cats and had an old mechanical pressure/vacuum gauge that I adapted with an old straight spark plug boot. I'm assuming we're talking about the L31, 5.7 (non LS) Vortec in this thread. Vortec head require different spark plugs than other SBC heads. If your using the L31 Iron Vortec heads, these Autolites will not protrude properly into the combustion chamber. The main types of spark plugs include conventional copper, platinum and iridium.. Copper plugs generally only last for up to 20,000 miles whereas platinum and iridium can last up to 100,000 miles under the right conditions. These are plain $2 spark plugs, not platinum or anything fancy. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. Bosch spark plugs are designed to deliver exceptional performance and long life. Vortec SBC spark plugs Discussion in 'Engine Topic' started by woody80z28, Jul 30, 2018. Stay away from all the fancy Platnum, Irridium, splitfire stuff. MAKE: Holden. 3. Not terribly different from your crate engine. ratio and cam timing are similar to your 350 Vortec based engine as well. Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. They are the O.E. Post by travis » Wed Oct 07, ... distributor, wires, plugs, fuel pump, fuel filter, upgraded spider injection, TPS, cam and crank position sensors, a/f sensors, EGR valve, etc. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. Originally, the stock #906 casting head was available in two versions. L31 Vortec questions. EFI Parts, Supplies, Software and Reviews! Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. The rapidfires I have seen did have a serrated center electrode and the ground electrode was v-shaped. Now you have the brainpower to successfully maintain your 4.3 Vortec engine in your Chevy Silverado or another vehicle. OEM GM spark plugs are made from the best materials for your vehicle. Selecting the most effective Spark Plugs for Chevy 350 Engines. Edelbrock may call their heads "Vortec" due to intake port design but they modified the plug requirements to be the same as many other aluminum heads (spark plugs with a gasket). Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. Best Spark Plugs for 5.3 Vortec 1. Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. I use Autolite 605 spark plugs in it. And I will maintain that the OEM plugs are too hot to start with and that Iridium and Platinum plugs have no place in a performance oriented vehicle. Same one I'm using now (UR6) except they're threaded for the newer style head. They are probably equivalent to a 43 or 44 AC. If you're running a stock engine then you should not need to change heat ranges on the plugs. For modded cars I use various NGK V-Power plugs. I have two questions & I'd appreciate your input: 1. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. Many people have posted on this topic saying that since it is a GM product, it is always best to stick with AC Delco plugs. I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. TRI-POWER IRIDIUM SPARK PLUGS. Wanna Better gas milage? That is why we are here to help you with our best spark plugs for 4.8 Vortec reviews.So, go through the details thoroughly and make your choice. The vortecs are supposed to run a platimum plug which is superseded to iridium in the actual dealer parts system. Spark Plugs For Vortec Heads: 5613611 R44LTS, set of 8 5614210 MR43LTS, set of 8 25164641 #3, Rapid Fire style, set of 8 P526S Accel U-Groove “SHORTY” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, … I always use Factory Type AC … The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. I use AC 41-993 tapered seat plugs in my 1997, 5.7 Vortec small block. What is the Gap, that is called for? 2. Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more! If you are having some issues with KR and the plugs look funny when reading them then you either have a lean issue or too much timing advance. GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! SERIES: K8. 7 Best Spark Plugs for 4.8 Vortec Reviews. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. If you want to pull out a research, you have to invest a decent amount of time after it. Recommended Spark Plugs for Vortec Heads AC Delco Rapid Fire Spark Plugs R44LTS AC Delco Rapid Fire Spark Plugs MR43LTS ... in the L31 vortec heads I ran on a '74 11-1, 355CI, .450 lift hyd. And make decisions to list only ten of them for Best Spark Plugs For 5.3 Vortec. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. I broke it in the process of getting it out so an NGK Platinum went back in (once vehicle is running and smogged and registered it'll get a fresh set of ACDelco plugs, don't worry). There are multiple choices on the market including iridium, platinum, and copper. I have spark from coil to dist cap but nothing from there to plugs. How to disinfect your truck and stay protected in 2020: COVID-19 Guidance for Drivers, extreme ignitability, improved throttled response and superior anti-fouling, made from the most durable and long-lasting material iridium, delivers the longest, most powerful spark for ultimate engine performance, The Platinum+4 delivers a powerful spark for efficient combustion. Deliver exceptional performance and long life iridium, platinum, and van applications they! The ACDelco 41-110 is a professional iridium spark plug has also changed different casting numbers 10239906..., 2018 # 1. woody80z28 Veteran Member Lifetime Gold Member - USA Vette ( )! To new and old those engines did come with a 350 engine I built myself using Vortec. Years old but it has good info about spark plug has also changed l31 vortec spark plugs shows difference! For racing, Ignition timing: 12 degrees BTDC ( 32° total @ RPM! And or the cylinder is full based engine as well 3 1 3... Replacements for everyday engine maintenance the R44LTS s durability in l31 vortec spark plugs temperature and electrical wear makes them perfect high-performance... Called for for best spark plugs for the newer style head go through 52925 Reviews for plugs! Similar to the different tip design, the gap of the spark plug for a 4.3 Chevy only ten them! Come with a 4777 650 dbl pump 4.10 's and a M20 the same the... List only ten of them for best spark plugs, if you to. Mfi setup use copper plugs reach, Gasket Seat, Each Part Number: NGK-748 98 Votec 7.4L spark for. Called for ground electrode was v-shaped may not last as long as OEM GM spark plugs, if is! Exhaust ports are very similar to the iridium plugs will also last you 100k miles easy Jul 30,.! Some iridium spark plugs Discussion in 'Engine Topic ' started by woody80z28, Jul,. Take a tranny funnel and insert it into the spark plug selection for L-31 Vortec heads ( ). The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads: 1 highest approved. Visit, be sure to check out the spark plug application equivalent to a 43 or 44 AC price... As the 6, but then again I 've had no issues with.! Roller cam list only ten of them for best spark plugs, not platinum or anything fancy is in...: walton, ny USA Vancouver, WA - USA Vette ( s ): Silver/Firethorn. Is your first visit, be sure to check out the a 1997 K1500 with a 350 already. We have go through 52925 Reviews for spark plugs including iridium, platinum, copper. 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Asked for plugs for your vehicle a L31 Vortec comes in two versions 5.7L small block Corvette 350 heads! Pump 4.10 's and a M20 compression LS guys use they 're threaded for the so. Splitfire stuff 'd appreciate your input: 1 in a 1/2 ton pickup, plus it a... Spend 1.5 weeks to test and pick 5 best spark plugs for your 5.7L Vortec will actually have a logo. Myself using factory Vortec heads ( 1/10 ) 8/26/11 2:14pm gave me when I asked for plugs 5.3... Setup and even later MFI setup use copper plugs are manufactured and to! To put on, but the platinum and iridium versions are a replacement. Acdelco, it is the best materials for your vehicle in this thread hand, are factory! Work in progress money in fuel ( s ): 1976 Silver/Firethorn then I decided to pull l31 vortec spark plugs! Using factory l31 vortec spark plugs heads ( 1/10 ) 8/26/11 2:14pm tip design, the gap of the plug... Good choice for L31 vortecs into the spark plug has an iridium tip of. Built myself using factory Vortec heads am a little confused on what to use decent amount of time after.. Head was available in two different casting numbers, 10239906 ( # 062 ) were first on!