2004 6.0 NV4500 Tahoe

[randeez]

Should have because I failed myself

task failed successfully

 

[Dantheman1540]

Got scolded by the tuner for using iridium TR5s. He said “the platinum/iridium plugs have a coating which keeps them clean longer but is more prone to misfires in something with a lot of timing”. He suggested copper tr6 gapped at .035 so that’s what I ordered.

 

[Tonyrodz]

Got scolded by the tuner for using iridium TR5s. He said “the platinum/iridium plugs have a coating which keeps them clean longer but is more prone to misfires in something with a lot of timing”. He suggested copper tr6 gapped at .035 so that’s what I ordered.

Isn't the factory gap a little bigger? Just curious--Why the different gap?

 

[OR VietVet]

Yea, I think the factory gap is .042. Plus, what is "a lot of tune".

 

[Dantheman1540]

Yea, I think the factory gap is .042. Plus, what is "a lot of tune".

A lot of timing is mid to high 20*s, I think it hits 30* in a few spots. Factory lq4 tunes have like 6-8* of timing in the top end, it’s fairly pathetic.

Isn't the factory gap a little bigger? Just curious--Why the different gap?

Everyone likes a tighter gap………. To prevent spark blow out.

 

[Tonyrodz]

Everyone likes a tighter gap………. To prevent spark blow out.

That's what she said.

 

[OR VietVet]

I knew a girl like that once........just once.

 

[iamdub]

Got scolded by the tuner for using iridium TR5s. He said “the platinum/iridium plugs have a coating which keeps them clean longer but is more prone to misfires in something with a lot of timing”. He suggested copper tr6 gapped at .035 so that’s what I ordered.

I was just discussing with my Tahoe Twin yesterday how the "old school" copper plugs were actually better performers, but last about 100K miles less. It's got me thinking that I'd probably be a good candidate for some copper plugs with how mine's tuned and with how little I drive it. I'm glad you shared the details. I've been trying to find something unnecessary to spend money on.

*EDIT* NGK #42-TR6? #4177?

 

[Dantheman1540]

I was just discussing with my Tahoe Twin yesterday how the "old school" copper plugs were actually better performers, but last about 100K miles less. It's got me thinking that I'd probably be a good candidate for some copper plugs with how mine's tuned and with how little I drive it. I'm glad you shared the details. I've been trying to find something unnecessary to spend money on.

*EDIT* NGK #42-TR6? #4177?

That’s the ones! Plugs are so easy to do in these trucks it’s really not a problem for me, to spend $29.99 and 1 hour a year in doing the plugs. Since I’m not driving it 20k a year anymore I’ll probably do them whenever the heck I remember or something like every 20k.

How much timing are you running towards the top end?

 

[iamdub]

That’s the ones! Plugs are so easy to do in these trucks it’s really not a problem for me, to spend $29.99 and 1 hour a year in doing the plugs. Since I’m not driving it 20k a year anymore I’ll probably do them whenever the heck I remember or something like every 20k.

Agreed and same.

How much timing are you running towards the top end?

Low octane:




High octane: