gwj

It's getting plug change time again, usually about every 20-25K with the NGK TR55s. Seriously considering going to a higher mileage plug if the performance hit isn't there. How 'bout it folks? Anyone had good performance/mileage out of iridiums? Lets hear it........ good or bad.

Crazy Man

iTrader: (6)

Man I went from ac delco Iridiums to Ngk tr55s and I can really tell the car dosent run as well on the ngks dosent Idle as smooth and I think personally the ac delco Iridiums blows ngks out the water.....

Blacker

iTrader: (3)

I have been running NGK Iridiums and have 10K on them. They look great and the car idles fine.

gwj

Thanks for the input, guys. It seems I just don't have much time to work on the cars anymore, especially with all the projects the wife finds for me.

Another_User

Really? That's a little crazy to go from old iridiums to new plugs of any kind and have the car idle worse.

WILWAXU

iTrader: (6)

What did you have the NGK's gapped at.

btw, your results are not common.

Grimes

iTrader: (3)

Well, FWIW, I just replaced the stock platinums at 42k miles, with TR55's, and it's a lot better in terms of idle quality and seat of the pants feel.

01ls1lover

iTrader: (18)

What are they supose to be gapped at?

WILWAXU

iTrader: (6)

NGK TR55's should be at (.059) or .055 on my cheap guage

davered00ss

iTrader: (4)

My TR55IX plugs were shot @ 13K. I pulled them when I did the headers and the gaps were huge. The car did still run great, just huge gaps after 13K.

gwj

13K! Thats pretty wild, considering the miles I've put on NGK coppers before.
Wonder how often people get those results.....
Gerald
(still haven't done that plug change)