BMD18

Hi i am wanting to do a lil tune up i have changed the oil and oil filter and got a new gatorback belt!! But i was wondering what are the BEST spark Plugs for a LT1? Some one told me NGK where the best but very expensive!! Please let me know your opions!



BOW TO THE Z28

MTBSully

NGK tr55's, and they really arent that expensive

Stl94LT1

TR55's are ~$1.50/each

mdacton

Is the car stock? and what is it? If stock I would run the stock delco plug.

Fatdog2

NGK's.Will bring a smile to your face.

marshall93z

Wow! Where?

They are like ~$3 around here.

Bersaglieri

Just put in Autolite 106's today to replace some fouled TR55's. Like a buck each.

-Dustin-

jay_rich

Im running autolite 104 platinums gapped at .045 for N/A right now....the car had coppers in before and it ran solid.

I have some NGK BR7EF for the 150 shot i will be running.

Jay

bombebomb

I have ngk tr55's in mine, it has a spun bearing

CheshireCat

mdacton asked the question. What are you running? If it is a stock LT1, then there's no real reason to switch away from a stock style plug. The AC Delco's in mine were still strong past 115k miles. I replaced them with Autolite Platinums of the stock heat range. No problems.

If you plan on running Nitrous, then go with a copper plug. Otherwise, the stock plugs work great. It's a spark plug. Don't overthink it unless you've done a bunch of power adding mods that would require a different heat range.

Bersaglieri

Unless when you pull your AC Delco's and half or more of the platinump pucks are gone. Maybe they have fixed that problem, but that's why I dont run them.

-Dustin-

caldercay

There are different types of TR55's, hence the price difference. Go to
Summit and enter "tr55" in the search box - you'll see 5-6 types.

marshall93z

$2.39 for the cheapest one. And it's the same one I used... "V-Power".

az0884

I used some cheap Autolite 106's and the car has never run this good.

I think more expensive is not always better, but then again i might be having to change them sooner than if I would have gone with a more expensive plug but It only take about 30 minutes to do on my car...maybe the headers make it easier but i laugh when shops say its like a 5 hour job.

sam pace

I love the NGK TR55IX. They are the Iridium plug.
They cost a little more, but they last 3 times longer and you can use nitrous with them.
They also have less resistance to spark.
I gapped mine down to .045". My car runs the best at that gap.
Lt1's suck to do plugs on, unless you are warped or have little fingers.