Feenix

I run 104s gapped at .050 but would gap em .035 if I were to spray

shoebox

It does not matter what a plug comes gapped at, you always check it before installation.

mrmint69

.035 For Supercharged.

BUBBA

I can see where .035 would work ok with highly volitile juice, but seems that with a weaker, shorter spark that with boost you risk blowing the damn thing out before a complete lite off, which might compromise your power numbers and MPG. Then again...

95Blackhawk

.035 here. .050 per GM is for emission reasons.

klrz28

my tr55's are gapped at .060. Ive got LTCC though makin over 450hp at the crank

Sweetred95ta

Is that gap per the LTCC instructions?

klrz28

yeah, ls1s are gapped at .060 i had em at ..035 and Iwent to .060, made quite a bit of difference. I wouldnt recommend gappin that big unless you have ltcc. If your cars stock go.050 and run premium

ABA383

TR 55s gapped at .035"...

--Alan

klrz28

No tr 5's are gapped at .035

kline454

i ran tr55 at .050 on my 350, now on my 383 with go juice im running tr6 at .037, I run msd 6a and coil on both the setups.

klrz28

You hit the dyno yet ?

NoRiceInside

someone fill me in on this gap science. im taking a break doing my LT1 tune up. #2 is gettin to me.

i have acdelco platinums. for some reason ive been gapping them to .045 and throwing em in. is there a benefit to gapping them tighter or will it hurt?

OBE1 95Z28

If you're not running serious power adders like nitrous or a supercharger, there's no need to reduce the gap. The power adders can blow the spark out, that's why the gap is reduced and ignition "boosters" are used.

2000GTP

I've come across a few people who gap their plugs tighter because they have a good number of miles on their ignition system. Is their any truth to that?