correct spark plug
Thread Starter
Burning Brakes
Joined: Mar 2004
Posts: 1,005
Likes: 163
From: Grand Harbor in South Carolina
correct spark plug
I'm sorry to beat a dead horse but I went to Advance Auto to get plugs for my '61. Their computer said R43S for my base 283ci/ 230hp. I believe this has been talked about before with similar plugs but I wanted to be sure. Is there an issue I need to address with these plugs?Thanks Wib
Le Mans Master
Joined: Nov 2000
Posts: 7,246
Likes: 21
From: Going too fast over the hill. Iowa
I believe your owners manual will say you need nonresistor plugs. If you still have an original coil, resistor plugs and resistor wires will overload it.
I still have a box or two of ac 43s or 44s (s means extended tip) plugs around the garage. They are also for sale in the NCRS Driveline. If you have a replacement coil or metal core wires, use whatever works - and don't worry.
I still have a box or two of ac 43s or 44s (s means extended tip) plugs around the garage. They are also for sale in the NCRS Driveline. If you have a replacement coil or metal core wires, use whatever works - and don't worry.
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Originally Posted by SWCDuke
R45
Duke
Duke
I think the saying goes something like "garbage in, garbage out". They may have a great computer but whoever put that information in it has no business in that business. 43's have a place in race engines or as a bandaid in a terminally lean engine.
Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,270
Since AC no longer makes non-resistor plugs, many use resistor plugs with no apparent problems. AC heat range "5" works best on all street driven SBs.
If you want a true non-resistor plug equivlent to the AC 45, the NGK B4 or Denso W14-U fill the bill.
Duke
If you want a true non-resistor plug equivlent to the AC 45, the NGK B4 or Denso W14-U fill the bill.
Duke
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo