CaptainK
CCCUK Member
I have a 1968 327/300hp engine. Mostly standard, except Edelbrock intake and carb.
I want to change the spark plugs as its been a while, but no idea what plugs to use. Last time I had the plugs changed I bought what the internet says is the plugs for me to use - some big fat ended short ones. Even some well known Corvette suppliers list the fat plugs as the ones for my car, weirdly. Turns out they were wrong as I had a garage replace them, and they didn't physically fit as the ones in the engine were thinner and had a longer screw part.
Below is a new plug (the clean one) I bought wrongly many years back (B6S), and next to it is an original plug that was in my engine when I got the car (AC Delco 45TS).
I have no idea what plug is currently in my engine, as the garage sorted out new plugs when they said mine were too big.
So fast forward to NOW and I want to change plugs again. I could go for the AC Delco 45TS again as evidently they fit, but thought I'd ask you for any recommendations as they weren't in the car long before I had them changed.
Also as the "TS" says, I'm guessing I need "Tapered" plugs. But do I need "S" plugs? Can I got for a 44 instead of a 45? What would be the NGK or other manufacturer equivalent? The AC 45 TS also seems to be "resistor" plugs - do I need them? I've read up on this, and the more I read the more it confuses me.
I've also read it also depends on driving style and kind of driving you do. Apparently if you drive more in town you need a hotter plug or something. I have no idea. But I drive mostly A and B roads and some duallies / motorways. Try to avoid city driving.
Please recommend me a plug. Thanks.
I want to change the spark plugs as its been a while, but no idea what plugs to use. Last time I had the plugs changed I bought what the internet says is the plugs for me to use - some big fat ended short ones. Even some well known Corvette suppliers list the fat plugs as the ones for my car, weirdly. Turns out they were wrong as I had a garage replace them, and they didn't physically fit as the ones in the engine were thinner and had a longer screw part.
Below is a new plug (the clean one) I bought wrongly many years back (B6S), and next to it is an original plug that was in my engine when I got the car (AC Delco 45TS).
I have no idea what plug is currently in my engine, as the garage sorted out new plugs when they said mine were too big.
So fast forward to NOW and I want to change plugs again. I could go for the AC Delco 45TS again as evidently they fit, but thought I'd ask you for any recommendations as they weren't in the car long before I had them changed.
Also as the "TS" says, I'm guessing I need "Tapered" plugs. But do I need "S" plugs? Can I got for a 44 instead of a 45? What would be the NGK or other manufacturer equivalent? The AC 45 TS also seems to be "resistor" plugs - do I need them? I've read up on this, and the more I read the more it confuses me.
I've also read it also depends on driving style and kind of driving you do. Apparently if you drive more in town you need a hotter plug or something. I have no idea. But I drive mostly A and B roads and some duallies / motorways. Try to avoid city driving.
Please recommend me a plug. Thanks.
