Shop for ACDelco Spark Plug Part #: R45 for your vehicle. 3.Part number 276S may be used for Header applications in place of P/N 276. Worked fine. Usually the second number is the heat range. 9.0 to 9.75 R45 or R44, Above 9.75 R44 only, if over 10:1 you might need to drop back to an R43 . & HEI. i am using an R45 spark plug. Parts are just part of what we do. Some 1968 info from the Delco Spark Plug Catalog 4 Bbl. Posts: 3,724. My Chilton Parts and Labor manual states the correct AC Spark plug is R44. When it comes to replacing your spark and glow plugs, ACDelco offers a full line of Professional premium aftermarket and Specialty spark and glow plug products. Place your order online today and pick it up in store at your convenience. Will any of these R44 styles work? Engine & Drivetrain. Refer to recommendation section for specific engine applications Comp. Available for most older vehicle makes and models, ACDelco Spark Plug design features: * A copper … The R43 is the coldest, R44 is warmer, R45 is warmer still. Stock gap with 100% stock ignition system. and material, plugs produced by various manufacturers do not have exactly the same heat range. The R45 is a hotter plug than R44 which is hotter than R43. 350's? They are used in Buicks & Olds with .060 gaps. Filling Station - Chevrolet & GMC Reproduction Parts Re: What to use that is hotter than R45 AcDelco Plugs [Re: wisebri24] #340499 04/17/15 12:12 AM: Joined: Feb 2008. Not a 350, but I had 45's in my 454 and while they performed satisfactory after changing back to 44's (new plug wires at the same time) it starts substantially better - like, first compression stroke 9 times out of 10. I think I have 2 or 3 sets of used 44's in my "stuff" somewhere. Register or Log In To remove these advertisements. The second ACDelco spark plug to enter our list, this time a slightly different unit with different features. I ordered new ones from Rick's. Spark plug heat range is the measure of how fast the spark plug tip dissipates combustion heat. Oh BTW The "TS" at the end stands for tapered seat, projected nose We use cookies to personalise ads, to provide social media features and to analyse our traffic. ACDelco 41-110 Professional Iridium Spark Plug. Asked by Wiki User. Location: Falls City, Nebraska "100 Miles From Nowhere". It must do this in a precise and controlled manner so the spark plug will: Stay cool enough to avoid pre-ignition and/or electrode destruction due to detonation. Thought I would go ahead and do a tune up on the 1952 3100 I purchased a few weeks ago just so I would know when the parts were all replaced. R43N Some 1969 info from the Delco Spark Plug Catalog 302 Z/28 - R43 307 2Bbl. Why don't libraries smell like bookstores? Chev. Due to different engine modifications and conditions,a hotter or colder spark plug may be required. What does contingent mean in real estate? The AC R44 is hard to come by, you'd have to cross to a Champion part number. AC Delco R44 spark plugs vs R43 I wanted to try to find a set of AC Delco R44 plugs as that is the factory plug application for my 1969 350/300 engine. When it comes to replacing your spark and glow plugs, ACDelco offers a full line of Professional premium aftermarket and Specialty spark and glow plug products. Is Cicely Tyson related to Min Louis Farrakhan? The TSX is a wider gap. ACDelco R44T in my factory 72 350, R44XLS in my 69 L34 396. - R45 350 - R44 396 - R44N Some 1970 info from the Delco Spark Plug Catalog 350 4Bbl. Like R-44Ts. AC Delco R44 spark plugs vs R43 I wanted to try to find a set of AC Delco R44 plugs as that is the factory plug application for my 1969 350/300 engine. Hi I would like to replace the sparks on my 67 Camaro SS 350 with the original L48 engine. Spark Plugs and Wires. hi rich, i don't know which plug is better but i have a similar combo. Some of the spark plugs are R44TS and some of them are R45TS, which is the right plug for my engine? 57 replacement spark plugs for AC Delco R44. ChatMaster - … Bear in mind that the heat range has nothing to do with the spark - it is a measure of how efficiently the plug dissipates heat from combustion. Who is the longest reigning WWE Champion of all time? Hendersonville, N.C. bobg1951chevy. I have an 83 Monte Carlo that was converted to an SS. Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS 6222 BPR5HS 45 3210 B4 41-965 2467 PTR5A-13 45L 3112 B4L On Ebay, I have seen R44T and R44S..hot start and cold start or something like that. good luck mike Do not use it - its too cold for the application. See Answer. R44 was for street driving. 57 replacement spark plugs for AC DELCO R44. 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