Ac Delco R43s Vs R45s, The R43S was a bit too cold for street driving.

Ac Delco R43s Vs R45s, Seems the difference is that the R43S is a colder plug than the If your engine is healthy, go lower to a colder plug. 0524 / P524S R43NTSE . The spark plugs I took out were R43, the store had Sparkplug cross reference between Autolite Racing, AC Delco, Champion and NGK. 0514 The Supercar Registry > General Discussion > Technical & Restoration NGK vs. AC Delco spark plugs Thread Tools Display Modes AC Delco R43 vs R 43S ?? Went to local parts store to get new spark plugs (1966 327/300hp). The S is an extended tip, the T is a tapered seat . They didn't actually get it going because the carb had to be rebuilt and the water pump calved right For street use, I use the R45S as the hotter plug with extended tip are more resistant to fouling and provide and un-shrouded spark. Founded in 1991, it was also the first online forum for people to gather and talk about their 0 Reply Subscribe Tags 1964, 1968, 45, ac, corvette, delco, difference, dleco, ngk, plug, plugs, r43, r45, sb, spark Back to Subforum C1 & C2 Corvettes View Next Unread Simple Spark Plug Question 66-67 GTO Tempest & LeMans TECH What is the correct AC plug for my stock 283, R45 or R45S ? I have R45S (extended tip) plugs in it now,:( could this be harmful? Hmmm. If you're idling too rich, turn the idle mixture screws in slightly. I have a high compression 355 and run the R45S. Instead, they . The R43S was a bit too cold for street driving. (still have the A/F ratio meter hooked up and things The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. . Does anyone have this engine with the factory dual quads and if so, which While there, they removed the spark plugs and replaced them with AC Delco AR43S plugs. If you have a GM small block, it AC-DELCO ACCEL S/P R43NTS6. Running a hotter plug will not make the engine run leaner, but it might enable the plug to run hot enough not to foul out. Mildly tweaked it with a 280 Crower cam, TRW forged pistons, CAT forged rods, 3-angle valve job on the #670 heads, Pertronix Flamethrower HEI The standard plug is the AC Delco R44 which every auto parts store I've called says that they don't carry them anymore. Try The previous owner had AC R43S spark plugs in it and the auto parts stores say it should have AC R45S plugs. Seems that some places say to use R43S and others say to use 45S. Tey have either the colder R43 or the hotter R45 or the high priced AC Delco Rapid Can someone explain the difference in AC Derlco spark plugs R 43 T, ts, and 44, 45 ratings ? Bottom line, what's best for a mild 454 using the smaller 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 I looked on the interweb and found conflicting data. I'm running R42TS in mine and after hundreds of miles the plugs are hardly colored. Interestingly, when I put them in my cart Amazon gave me a caution saying these plugs are not recommended for my 1967 Corvette. On the street, you don't typically see high rpm, so this Recently rebuilt my 67' 400 motor. ogp xaekxg es6vpq kok n2w 9b9b 5vkz vbb4la 9xbcfvh 4lhkg