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73-87 Chevy _ GMC Trucks => Performance => Topic started by: txchainsawgogi on March 02, 2011, 10:55:50 pm

Title: easy spark plug question
Post by: txchainsawgogi on March 02, 2011, 10:55:50 pm: what would you guys run in a stock 78 chevy c10 350 if you lived in texas, and had headers and dual straight pipes? i know picking plugs on my motorcycles is down to a science, since i run the carbs with K&N pods, have so and so jetting and live at a certain sea level...

is it that complicated on a daily driver beat up truck?
Title: Re: easy spark plug question
Post by: bowtieman82 on March 03, 2011, 12:32:59 am: try some NGK plugs they work great in chevy, ive ran them for over 10 years now no problems had one set last me 3 years as long as i cleaned them and keep my truck turned.
Title: Re: easy spark plug question
Post by: Grim 82 on March 03, 2011, 08:21:24 am: AC Delco R43TS
Title: Re: easy spark plug question
Post by: three8six on March 03, 2011, 11:39:36 am: x2 @ Grim
Title: Re: easy spark plug question
Post by: royo on March 03, 2011, 12:34:49 pm: Quote from: Grim 82 on March 03, 2011, 08:21:24 am
AC Delco R43TS
Why r43s why not r45s ???
Title: Re: easy spark plug question
Post by: Grim 82 on March 03, 2011, 01:32:18 pm: GM released a service bulletin to specify that the 43 supercedes the 44t or 45's for these motors. It's a cooler plug so there is less tendency for spark knock, which was especially critical for the ESC equipped models.
Other people would say that with today's quality of gas you need a hotter plug, etc, but from personal experience I have seen increased mileage and better performance when I switched to 43's. All motor combinations behave differently, and there are many choices for spark plugs, but I would err on the conservative side as opposed to using too hot of a plug and eventually burning a hole in a piston.
Title: Re: easy spark plug question
Post by: Red87 on March 04, 2011, 01:40:10 pm: I've been chasing down an oil leak with the help of a friend, and we tore out the top end of my wife's 87 and found the problem area. During tear-down, when I pulled the plugs, they were severely white (indicating lean condition), so my friend recommended getting cooler plugs. Glad I saw this posted, as I'm ready to put the top end back in this Sunday.
Title: Re: easy spark plug question
Post by: txchainsawgogi on March 11, 2011, 04:45:58 pm: keep the gap right out of the box or widen it?
Title: Re: easy spark plug question
Post by: Grim 82 on March 11, 2011, 08:41:09 pm: I always set the gap on new plugs. Most of the time they are right on, but I have seen some that are way off. Also I run mine a little wider than the stock recommendation.
Title: Re: easy spark plug question
Post by: txchainsawgogi on March 11, 2011, 09:31:28 pm: Quote from: Grim 82 on March 11, 2011, 08:41:09 pm
I always set the gap on new plugs. Most of the time they are right on, but I have seen some that are way off. Also I run mine a little wider than the stock recommendation.

ahhh but HOW much wider? haha.
Title: Re: easy spark plug question
Post by: Grim 82 on March 11, 2011, 10:49:41 pm: If you are running a 43 range plug IIRC the recommended gap is .035, and a 44 or 45 is .045.

I run .050 on r43ts's since I put in the MSD dizzy and some massive plug wires. This was from running it and removing and looking at the plugs and re-adjusting the gap until I had it as wide as I could get and still get a nice golden brown burn on the plugs, with as much timing advance as I could get burning 89 octane without pinging. So much trial and error...
Title: Re: easy spark plug question
Post by: 76k104x4 on March 11, 2011, 11:02:18 pm: i use the Accel shorty header plugs
Title: Re: easy spark plug question
Post by: roger97338 on March 12, 2011, 10:32:38 pm: Autolite 26's.
Title: Re: easy spark plug question
Post by: Blazin on March 13, 2011, 11:30:57 pm: I run the 43TS's or the Autolite 26's.