easy spark plug question

[txchainsawgogi]

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?

[bowtieman82]

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.

[Grim 82]

AC Delco R43TS

[three8six]

x2 @ Grim

[royo]

AC Delco R43TS

Why r43s    why not r45s

[Grim 82]

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.

[Red87]

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.

[txchainsawgogi]

keep the gap right out of the box or widen it?

[Grim 82]

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.

[txchainsawgogi]

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.

[Grim 82]

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...

[76k104x4]

i use the Accel shorty header plugs

[roger97338]

Autolite 26's.

[Blazin]

I run the 43TS's or the Autolite 26's.