LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

.045 spark plugs

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Old Mar 3, 2005 | 08:29 PM
  #1  
LT1 Bunny's Avatar
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From: Charlotte, NC
.045 spark plugs

Well, after going through everything with this darn car...I finally got it to run right!!! I was using ngk tr55s...ran like poop. Went hotter, went cooler....nothing seemed to work. Then I finally took some advice from a friend (68 year old man whos raced his whole life, and sons, and sons son...etc...). The plugs I'm running now are ACDelco MR43LTS. Yes thats right...Marine plugs. Before I use to have to trun the key...practically flood the motor every single time!

I threw these in because I did infact flood the motor out AGAIN...damn thing started right up. Idled perfect and I drove it too. GREAT! I'm seriously impressed. The plug is gaped at .045 .
Old Mar 3, 2005 | 10:11 PM
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Re: .045 spark plugs

Time to throw the engine in the drag boat!
Old Mar 3, 2005 | 10:14 PM
  #3  
lt4 fd's Avatar
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From: plano texas
Re: .045 spark plugs

What does a marine plug have thats different than a normal automotive plug like the tr55?
Old Mar 3, 2005 | 10:45 PM
  #4  
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From: Wyoming
Re: .045 spark plugs

im running autolite 104s gapped at .050 and it ran good and started good untill the rockers loosened up and made a huge mess...im a moron.
Old Mar 4, 2005 | 06:26 PM
  #5  
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From: Charlotte, NC
Re: .045 spark plugs

Originally Posted by shoebox
Time to throw the engine in the drag boat!
seriously! I could but my boat is a tiny little boat...I'd probably sink to the bottom

I have no clue what is so different other than they are gapped colder. The ones on my boat run on .045 . ??? I have no clue why they are different.

Well...I got bored so I threw in a set of heads I had laying around and the cc306 that I bought I don't know how many years ago (I think 2). So she's been a real b!tch to me for a few days. I've got brand new o2s but I dont have a mas air flow sensor so I think thats why its idling like **** right now. It's really heard to keep it steady after you get on it a few times. I also dont have an exhaust for it.

I'm actually thinking about selling the motor though. I really dont need it and it was in the car still so I thought I would amuse myself with this while I'm building a carbed motor for it (hence the...sounds like a winstone cup car).
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