redbadss

iTrader: (4)

like the title says, whats the difference between the two spark plugs? i've seen the msd plug wires with the ngk plugs and seens these two plugs are priced the same..

jmm98LS1

iTrader: (28)

tr6 is a colder plug

1999FirehawkLS1

iTrader: (21)

tr6 for spray or colder
n/a run the tr55

davered00ss

iTrader: (4)

TR6 is one heat range colder. Better for FI or Nitrous applications to avoid detonation. I have also heard that you should go to a colder plug when you add 50rwhp, but not sure I believe that. I'm ~150rwhp over stock and still running the TR55's w/ ~11.1:1 compression.

TORCHD 02 TA

iTrader: (39)

TR6 plugs are a colder lug used with H/C, N20 or FI

TR55 is used for a N/A car

davered00ss

iTrader: (4)

H/C = Heads/Cam is a N/A natural aspirated car.

TORCHD 02 TA

iTrader: (39)

You'll need to run a TR6 plug with a H/C car.

I am cam only running a TR6 plug

davered00ss

iTrader: (4)

It might be advisable, but not necessary. Like I said, a lot depends on the tune and compression ratio.

thirdgenbum

iTrader: (17)

what are ya'll gapping your tr55's at for n/a combinations? i'm slightly modded, small cam and 11:1 c/r...got a set of truck coils too. any help would be appreciated, i'm trying to wrap up the last bits of my swap today and tomorrow.

davered00ss

iTrader: (4)

Out of the box, they come .056-.057. I normally just make them all .057 I think the book says .059-.060

SOMbitch

iTrader: (8)

Not necssarilly. My tuners car runs 8.50's at 155 plus and he suggested TR55's for my car so I think he knows a little LS1 stuff...........

TORCHD 02 TA

iTrader: (39)

well i guess every tuner is differnet then