what iridium plugs for edelbrock LT1 heads?
03-29-2017, 09:37 AM
#1
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what iridium plugs for edelbrock LT1 heads?
Hi all, I haven't been on the forum in a while. I have a "93 Z28 with a LT1 with Edelbrock LT1 heads. I have been using Champion RC12YC plugs and now they are in need of a change and I want to go to an iridium plug. My question is, do I just find a 14mm x .750 gasket seat iridium plug and go with the gap as they come out of the box or try to find a plug that is pre gapped at .050" (Chevrolet reccommended gap)? NGK 6341 fits except the gap is closer to .030". any help would be appreciated. What should I expect with a smaller gap? The engine has 10.4:1 compression, cam that is the closest to stock that Comp offers, Edelbrock LT1 heads and intake, Holley 52mm throttle body. Thanks in advance.
Last edited by glfrmrk; 03-29-2017 at 10:07 AM. Reason: Left out some information
03-29-2017, 12:17 PM
#2
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Re: what iridium plugs for edelbrock LT1 heads?
See this chart.....
https://www.camaroz28.com/forums/n2o...-chart-431689/
Hopefully, you had those heads ported, because out of the box, they are not much of an improvement over the stock heads. Edelbrock claims 24 HP increase.
https://www.camaroz28.com/forums/n2o...-chart-431689/
LT1 w/ Trick Flow & Edelbrock Heads
Thread – 14mm
Reach – 3/4”
Socket – 5/8 hex
Seat – Gasket
Thread – 14mm
Reach – 3/4”
Socket – 5/8 hex
Seat – Gasket