Mr_president

iTrader: (38)

ok, i have read through numerous threads and i want to be safe by asking witch plugs would you guys recommend with my set up i curently have tr6s in right now. im not sure what the gap is but i want to reput new plugs and make sure there gapped correct

1st question: witch plugs for my application tr6 or tr55s (cam and boltons only;however i do have some detionation)

2nd question: what would you gap my plugs for my application to get the most hp!? (stock engine)

thanks!!

FstBlkz28

iTrader: (13)

if your not spraying, theres no reason to be running the tr6's. The tr55's are what you want, I have mine gapped at .051 right now ... but I think in a few weeks when I throw the new set in I'm gonna gap them to .055 and see if i can notice any differences.

black01_WS6

iTrader: (13)

the ngk come pre gapped, and you only need to run the tr55's. @ 50. if you are getting any detionation it is with your tune. what af are you running? tr6's are too cold of a plug if you are not FI or nitrous.

SgtB

iTrader: (3)

He is absolutely correct.

LS1-450

iTrader: (33)

Do you know your A/F ratio @ WOT? I make about the same power as you (mod's. in signature) & use Autolite 103's presently gapped @ .046 w/ no trouble. My car backfires @ .055. The .050 suggested sounds resonable to me. My A/F ratio is 14.7:1 @ idle & 12.8-12.9:1 @ WOT. Check the air/fuel ratio under the noted conditions with a wide band O2 sensor or take it for a dyno tune.

crazy camaro

iTrader: (5)

if you got some cash to drop i recomend ac delco irridiums

Mr_president

iTrader: (38)

well with the tr6s it runs fine im not sure what there gapped at but i keep throwing a p0300 code but i do have a fairly good size cam! my air to fuel ratio was perfect on the dyno i cant rember what it was but my idle is pig rich im going to try the tr55 at like .50 but i want the most out of them im not fi or nitrious yet but we put the tr6s to take away the detionation.... soo exactly what is recommended for the most hp

tr55 with .50 or 55 or.51 ect..

FstBlkz28

iTrader: (13)

I've heard the "rule" is Stock - .004 for every 50hp you have over stock.

LS1-450

iTrader: (33)

How is it running fine when it's throwing a code? The plan of starting with TR55's @ .050" is a good place to start. As I've stated, mine preferrs Autolite 103's @ .046". Very few on this board would try Autolites because their not in the main stream of threads. Not saying that there's anything wrong with TR55's & many have had success with them. You just have to try things until you like how it's performing & TR55's @ .050" sounds good.

WS6FirebirdTA00

iTrader: (33)

i have tr6 plugs in my car, what they said is totally false abuot them being only for FI applications. lots of guys run these plugs. for every 75-100 hp or so you add over stock you want to go a heat range colder. i would get tr6 gapped at 0.045-0.050

Mr_president

iTrader: (38)

wooooooow,im getting a bunch of differnt answers! ok i dont know what to do now! apparently my plugs are at like .30 something ,and i have tr6s what should i do if i buy new set of tr6s and gap them at like .55 how much more hp would i gain (hypothisis) anyone!
also ive had these plugs for a good 6 months the code just started comging up alot recently!

0r what is the best gap with the tr6s or tr55s?

WS6FirebirdTA00

iTrader: (33)

that is too tight a gap for n/a, get some new ones and gap them at 0.050 and be done with it

Mr_president

iTrader: (38)

cool thanks bro! any other opions appretiated!

slowpoke96z28

iTrader: (2)

figure out why the car is detonating first off. if the car detonates now because of a hot plug, tr55 would only make it worse. if the detonation is due to a lean condition or too much timing, it wont get worse with a hotter plug. if the tr6s aren't fouling out, they are fine for your engine, IMO

bshell

iTrader: (24)

You have mods that shouldn't require tr6s, yet you have to run them to prevent detonation. This leads me to think that you have an internal problem that you are covering up w/ the colder plugs. You need to find out why you are getting detonation w/ the regular plugs first. Carbon deposits and oil vapor blow by are a couple things that will cause it. Fix the cause of the detonation first, and then find out what heat range plug and at what gap will yield the most power.

WS6FirebirdTA00

iTrader: (33)

its not about preventing detonation, although that correct plugs will prevent it, it is about reading the plug and putting the correct plug in there. any cam cars i have dealt with tr55s were too hot, might not be the same for everyone but it has been for everyone i know. pull a plug and read it, that will tell the truth, just dont put the gap at 0.030, that is too tight IMO

TJ

iTrader: (10)

my car HATES NGK plugs.

i run the best times on motor, and nitrous with the colder plug

NGK tr55 = autolite 605
NGK tr6 = autolite 103

i use the 103's gapped at 45 or 50 at the moment, and have no troubles.

Big Geek

iTrader: (2)

Not to be funny or throw a wrench in here but I haven't heard you mention your total timing or compression. Both of these issues play into this equation as they are both critical to plug selection. I noticed in your signature that you have your camshaft advanced two degrees, this can also play into plug selection depending on the spec's of the camshaft. As some of the other gentleman here have suggested try using a stock heat range plug but I would also pull some of the ignition lead out up top. This may give you a little better burn rate in the cylinders at idle and lower RPM. If you were to put a stock heat range plug in it with a decent amount of timing in the lower no/low load areas and pull some of the total timing out up top it may help with detination and rich idle. These types of problems are much easier to figure out with a wide band O2 measurement. These are just some suggestions. Happy holidays to you and yours.

Jim C.

LS1-450

iTrader: (33)

Thank-you! Didn't think that I could be the only one. Just had never heard from anyone else who had the same success with that set-up. As stated above; my car runs best on Autolite 103's gapped @ .046" (mods. in signature).

Mr_president

iTrader: (38)

hmmm wish i could tell you that stuff of the top of my head! i do have a scanner on my car on the obd2 plug in that gives me # reading like iac engine load fuel trims ect... can i jot some of this down and post to help!!?? were to guys get you autolites at