73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Performance => Topic started by: 77c10diesel on November 20, 2009, 10:12:28 am

Title: What spark plugs are best for a 454?
Post by: 77c10diesel on November 20, 2009, 10:12:28 am

I did a search and did not come up with an answer. I am looking to improve the MPG of my 89 Suburban with the 454. Now, I know it is not an econo-box and not capable of 20+ MPG, I just want to make sure that I am squeezing the most out of it that I can, and that it is running the best it can.
I was wanting to know if any of the fancy 3 prong, Platinum, wisbang plugs are worth the extra money. No I don't want to spend $25 each for the new pulse plug, I am talking plugs in the $5 or maybe less range.
I also know that there are other factors that effect MPG, I am addressing those also, just looking for answers on the plugs.
Thanks

Title: Re: What spark plugs are best for a 454?
Post by: VileZambonie on November 20, 2009, 10:19:15 am

AC delco CR43TS

Title: Re: What spark plugs are best for a 454?
Post by: steve3408 on November 30, 2009, 04:00:06 pm

You might try some NGK Iridium spark plugs,they made a difference in my old chevy, starts/ runs a little better, and maybe 1-2 mpg better on gas.Plus you dont have to change 'em again for a long time they last like twice as long (or longer) as conventional plugs.

Title: Re: What spark plugs are best for a 454?
Post by: malibu795 on December 01, 2009, 03:36:22 pm

Quote from: VileZambonie on November 20, 2009, 10:19:15 am

AC delco CR43TS

i run the R43T from AC delco

aslo how strong is your ignition system?? and what gap are you running?

Title: Re: What spark plugs are best for a 454?
Post by: 86C20 on December 27, 2009, 07:56:23 pm

ok i did the acdelco 10s.
are they anybeter then the 43s..?