onefastbird95

iTrader: (4)

I am putting a vortech s-trim on my 95 lt1 formula. I have done some research and found some people put ngk tr6 and some put autolite 104 on there lt1's, but I have not gotten any deffinate answers... also there are different opinions on gapping. Vortech told me 40-42 would be the correct gap. I am also wihsing to replace the plug wires with some stock replacements. Please let me know your guys opinions so I can make the best possible selection.

onefastbird95

iTrader: (4)

anyone?

CALL911

iTrader: (17)

It depends on your boost level. If you are over 13#'s of boost, you should run an Autolite 103. Almost all guys are gapping at .35, although some go a little smaller like .32

I have heard some guys having issues with the NGK plugs.

SRZ

iTrader: (14)

TR6 gapped @ .030. CALL911 I didn't know autolite 103's were cold enough. Hmm I've got 2 sets laying around as spares.

onefastbird95

iTrader: (4)

I am going to be running right around 9#'s of boost so would you guys recommend the autolite 104? or another plug? I also hear mixed reactions on plug wires... mine have 40k on them so they need replaced and I was thinking a basic replacement plug wire would work, any opinions on that?

onefastbird95

iTrader: (4)

what is going to be the difference from choosing the autolite 103 and 104?

Fire67

iTrader: (3)

Sounds like your motor is stock... With 9psi. Definitely upgrade your plug wires, the stockers and cheap stock replacements suck.

I ran TR6ix's in my stock motor with 10psi at .035

Now Im running Autolite Iridium plugs gapped at .024

onefastbird95

iTrader: (4)

if I decide to go the autolite route which autolite would work best with the stock motor and 9psi?

Fire67

iTrader: (3)

Not sure of the autolite part numbers, but you'll need to go 1 heat range colder than stock. Im running 2 heat ranges colder but my engine is far from stock and we're maxing the blower out.

onefastbird95

iTrader: (4)

Yeah I was told to run 1-2 heat ranges colder than stock, I am prob going to pick up some autolites but don't know for sure yet if the 104 is what I want for a near stock motor with 9psi. Hopefully someone who has experience with the autolites will chime in!

CALL911

iTrader: (17)

Not sure between the 103's and the 104's. For my boost level, I know the 103's are perfect (15#'s), but not sure if it would still be good for your boost level.

onefastbird95

iTrader: (4)

Yeah for some reason I thought I remembered seeing seeing guys would use the 104's on superchargers that produced around 6-8 psi, but still waiting to have that confirmed by someone who has tryed them out and can tell me the best bet for 9psi

Jon@BruteSpeed

iTrader: (3)

I have been running Champion RS12YC for the last 5 yrs. I am also at 9lbs on my LT1 and my ETs show the engine loves them. If you are not a Champion fan you could cross reference these.

Jon@BruteSpeed

iTrader: (3)

Also, don't gap them any larger than .035.

Fire67

iTrader: (3)

Call911- You will only need 1 heat range colder. NGK TR6 is one part# I positively know. If you go to Advance auto parts or AutoZone I KNOW they can cross reference it.

2 heat ranges will be too cold for your setup.

burnzilla

iTrader: (3)

On a stock internal LT1?
I would be looking at some forged rotating assembly kits.

Jon@BruteSpeed

iTrader: (3)

That is what I have run since 02

CALL911

iTrader: (17)

I know for a fact that Autolite 103's are perfect for my boost setting. This has been proven on several similar boosted cars I know, and was reccomended by my tuner, until he found out I had AFR heads, and that the 103's don't have the gasketed seal I need for my heads.

I will be running Autolite 3922's in my car this year.

onefastbird95

iTrader: (4)

Have you run 9psi on your stock bottom end or did you build it up? I have been told 9psi is a bit much for stock, people say to bump it down a couple psi... not sure the best route to go

CALL911

iTrader: (17)

9psi is about the most I would run. Even with 9#'s, you better have a top notch fuel system, along with either a large intercooler or a methanol injection setup, not to mention a great tune.

Safely with a stock bottom end, and everything I listed above, I wouldn't go above 6#'s unless you are ready to buy a new block if the stock one goes.

Just my .02 cents. Everyone has their own opinion on this.