Bobsmyuncle

iTrader: (32)

347 ls1
12:1 cr
minimum of 93 octane always
7k redline


any suggestions?

part numbers and gaps?

nysbadmk8

Ngk tr6, gap .035-40

Darkman

iTrader: (2)

Another alternative in that application would be a Bosch 4505. The gap is preset and requires no adjustment.

Bobsmyuncle

iTrader: (32)

what are the differences going from a small gap to a larger one

nysbadmk8

.035 is a small gap..

sjsingle1

iTrader: (1)

big gap..........big spark

Bobsmyuncle

iTrader: (32)

no shiiiiiitttttttt. thanks.............



i meant, which is better for making more power. i would assume the larger gap would be better, bc it would cause more complete combustion. am i wrong???/

Dskeet6

iTrader: (20)

tr7 maybe.....

nysbadmk8

Your the one asking about spark plugs Einstein

Bigger gap, gives the possibility for more power, and spark blow out.

And based on the fact that I am assuming you have h/c/i car, since you are running 12:1 cr and reving to 7k keep the gap smaller,

Z28/2002

iTrader: (27)

I ran TR6s in my motor: Heads, cam, carb'd and 11.3:1 compression and had them gapped at .038

Bobsmyuncle

iTrader: (32)

someone asking about something doesnt make them mentally retarded. if i built a 347, wouldnt u think i know that .035 is smaller than .040????

now, why would u keep the gap smaller?(i know what a gap is)

Darkman

iTrader: (2)

A narrow gap increases the likelihood that spark will occur, but results in a weaker spark. Conversely a wider gap increases the strength of the spark but increases the possibility spark will not occur. Occasional misfires can go undetected, but still result in reduced power. The idea therefore, is to run the widest gap that will fire reliably in a particular application. The widest gap you can get away with depends on factors such as compression ratio, whether you change plugs frequently or infrequently, etc. Thus, within the operating range of possible gaps established by the manufacturer, the "right" gap is largely subjective.

sjsingle1

iTrader: (1)

a big gap takes a strong ignition......LS1s have a pretty strong 1.....and if not strong enuff for ya.......get some truck coils