Spark Plug Question
Thread Starter
Drifting
Joined: Jan 2012
Posts: 1,734
Likes: 276
From: Port Huron MI
Spark Plug Question
This may sound stupid... but I want to do this the right way, so I'll risk it:
Based on the pad stamp, my vette has a small block chevy engine from a 1969 chevelle or camaro. I've rebuilt the entire top of the engine with Edelbrock manifold, Doug's headers, Atomic 2 EFI and matching distributor. I was going to put in new plugs and run plug wires today, but the AC Delco R43S that was supposed to fit had too short a nose to seat into the block. I went back to my local places to get just R43 plugs... which apparently O'Reilly, Advanced Auto Parts, etc no longer stock or can order??? and got R45XLS plugs instead. Now these plugs fit, but will it run too hot in a 350/300 block? I read on camaro forums (due to the engine) that this will keep a street use car from fouling, but most of that was in reference to early cars and many with big blocks.
I've been very frustrated by how slowly progress has been on my 1970 resto, mainly because doubt kills progress and as an amateur I have a lot of doubt, including on something as basic as the right frickin' plug. Please, expert panel, tell me what the best plug would be to run on this SLLLLLLLLLOOOOOOOOWWWW going restoration.
As always, many thanks in advance.
Based on the pad stamp, my vette has a small block chevy engine from a 1969 chevelle or camaro. I've rebuilt the entire top of the engine with Edelbrock manifold, Doug's headers, Atomic 2 EFI and matching distributor. I was going to put in new plugs and run plug wires today, but the AC Delco R43S that was supposed to fit had too short a nose to seat into the block. I went back to my local places to get just R43 plugs... which apparently O'Reilly, Advanced Auto Parts, etc no longer stock or can order??? and got R45XLS plugs instead. Now these plugs fit, but will it run too hot in a 350/300 block? I read on camaro forums (due to the engine) that this will keep a street use car from fouling, but most of that was in reference to early cars and many with big blocks.
I've been very frustrated by how slowly progress has been on my 1970 resto, mainly because doubt kills progress and as an amateur I have a lot of doubt, including on something as basic as the right frickin' plug. Please, expert panel, tell me what the best plug would be to run on this SLLLLLLLLLOOOOOOOOWWWW going restoration.
As always, many thanks in advance.
Le Mans Master
Joined: Jun 2019
Posts: 7,656
Likes: 2,469
From: Indiana
I would consider NGK basic plug equivalent
all that ac delco is chinesium
edit..in for sale section someone was selling nos ac delco 44
edit 2
here
https://www.corvetteforum.com/forums...old-stock.html
all that ac delco is chinesium
edit..in for sale section someone was selling nos ac delco 44
edit 2
here
https://www.corvetteforum.com/forums...old-stock.html
Last edited by interpon; Jul 25, 2021 at 06:47 PM.
Thread Starter
Drifting
Joined: Jan 2012
Posts: 1,734
Likes: 276
From: Port Huron MI
"Chinesium" ... That's pretty funny. Thanks for the feedback. Since I have them already, since they fit, and based on that Cat Z06LMB's comment, I'll run the 45's -- unless there is a sudden outpouring of "don't do it's". Thanks guys.
Last edited by Stroh; Jul 26, 2021 at 08:37 AM.
