ArcticZ28

iTrader: (14)

My uncle's got a 95 vette which is in need of a tune up before we sell it. I'm gonna pick up some NGK TR55's, but was wondering what gap I should be running in it. The car is all stock except for a cat-back. I would know what to run if it was an LS1, but I don't really have much experience with the LT1's, so any feedback is appreciated. My guess would be .050.

emerica4601

iTrader: (5)

yep, .050

ridethesmallbus1

.044 what NGK said to gap for LT1

ArcticZ28

iTrader: (14)

.044? That seems a bit small. How did you come across that info?

95N20FORMULA

iTrader: (3)

mines at .44 and its worked good for me...

ArcticZ28

iTrader: (14)

If I order the TR55's for an LT1 from thunderracing, they come pre-gapped at .050. I'm wondering if this is just how they come in general, or if they are gapped that way just for the LT1's.

ridethesmallbus1

they came at .060 for me

3pnt4maro

iTrader: (2)

mine came at 50. i put mine at .44

Matts94Z28

iTrader: (6)

mine are @ 40 and work just fine.

sdm1234

iTrader: (8)

hmm mine are at .050 and no problems here. it sounds like theres a wide variance!

ArcticZ28

iTrader: (14)

Yea, quite a wide variance.

Hot94Z28

Well I put mine at .40 but I have a modded car. So .50 should be fine for it.

ArcticZ28

iTrader: (14)

Yea, I'm thinking anywhere in the .045-.050 range should be fine. I certainly wouldn't go smaller than that.

96slow6

Its a crap shoot. I have a stroker with all msd and tr55's. I run .050 and have great results. Now for some one with a stock opti running alittle smaller say .040 is as small as i could recomend, you might buy a few thousand more miles out of that stock opti by taking some of its load off of it. Also being its a little smaller you are less likely to get the spark blown out at upper rpm's.

streetwarrior96

.045 here