How to find the right AC Delco plug for my heads
Thread Starter
Member
Joined: Jul 2011
Posts: 454
Likes: 0
From: Augusta Township, MI
Car: 1985 IROC-Z
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
How to find the right AC Delco plug for my heads
I recently posted pictures of my plugs & asked for some advice. Though they look okay, I've decided to swap them out over the winter and change from NGK to AC Delco.
The problem I'm having is, that I'm not sure which AC Delco plugs are the correct ones. The instructions that came with the Edlebrock heads list Champion RC12YC plugs for street applications, so I cross-referenced that to NGK and came up with BK5RE. That was easy, but when I try to cross reference either to AC Delco, I get a list of different plugs and I'm not sure which one is the same heat range.
The problem I'm having is, that I'm not sure which AC Delco plugs are the correct ones. The instructions that came with the Edlebrock heads list Champion RC12YC plugs for street applications, so I cross-referenced that to NGK and came up with BK5RE. That was easy, but when I try to cross reference either to AC Delco, I get a list of different plugs and I'm not sure which one is the same heat range.
Moderator
Joined: Jan 2000
Posts: 19,659
Likes: 310
Re: How to find the right AC Delco plug for my heads
Did you happen to see this thread from a while back?
https://www.thirdgen.org/forums/tech...ml#post3379970
https://www.thirdgen.org/forums/tech...ml#post3379970
Joined: Oct 2001
Posts: 12,221
Likes: 1,141
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: How to find the right AC Delco plug for my heads
C4 corvette uses the FR3LS or FR5LS and it's what I use. I still have some old stock that I use so not sure what the numbers are these days
Thread
Thread Starter
Forum
Replies
Last Post
bensbaby
Tech / General Engine
2
Jul 8, 2022 04:33 PM