Spark plugs

[ClassicChimaera]

QBee said:

My high output turbo Saab runs on 9s.....

I might have had a motorbike that ran on a 9 but that's a long time ago.

[Ribol]

N7GTX said:

Unfortunately many people on forums with zero mechanical or practical training or experience can, by brainwashing and repetitive posting "convince" others of their views. Those people then take up the suggestions and follow this rigid, unbending 'advice' as they now believe the proposer must be right.

Nice to see how much things have changed in here:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[ChimpOnGas]

Ribol said:

N7GTX said:

Unfortunately many people on forums with zero mechanical or practical training or experience can, by brainwashing and repetitive posting "convince" others of their views. Those people then take up the suggestions and follow this rigid, unbending 'advice' as they now believe the proposer must be right.

Nice to see how much things have changed in here:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Welcome back, it's been a while

Bored with PH ballocks and took a break, or just out early for good behaviour?

And yes... this debate goes way back, almost as long as I've been using iridium plugs in my TVR with absolutely no issues whatsoever

Back in the day when real world long term testing counted for something we would view such irrefutable and watertight evidence a conclusion to the debate.

But as you quite rightly point out.... on PH the debate must go on

[PhilH42]

Now I didn't really want to resurrect the argument again but I'd like to pick the brains of the few FI owners on here on their choice of plugs and findings.

So I moved to BPR7ES when I fitted the turbo from 6's but would quite like to try the 7eix plugs....anyone running these on FI and projected or not...anyone running hotter 6 or cooler 8 and any fouling problems on mixed driving?

Thanks in advance chaps.

[QBee]

Running 6EIX plugs with the turbo (I asked my guru, he couldn't see any reason to change them, as they had worked so well NA). So far absolutely no problems in 3000 miles. Do you want me to take one out for a look see?

[PhilH42]

Yes please Anthony

Projected?

Edited by PhilH42 on Tuesday 12th September 11:31

[PhilH42]

What happened to Sardonicus's post....I was just about to reply

Still I picked up the bit about forget the 8 cheers.

[QBee]

PhilH42 said:

Yes please Anthony

Projected?

Edited by PhilH42 on Tuesday 12th September 11:31

Look pretty clean to me - comments, anyone? it had just come 170 miles on motorways, so should be clean, i.e. No town driving to foul it

[PhilH42]

Look ok to me from here, thanks for removing.

[phillpot]

Can we see the other 7 please? ......

[QBee]

phillpot said:

Can we see the other 7 please? ......

I will get another couple out when it has cooled down enough - just been to the shops and back for carrots, cream and shower gel (don't ask). any excuse for a drive. So they should be as dirty as they get.

[Classic Chim]

What gap are you employing Anthony, I was told I could go upto 1 mm but I've reduced it to 0.8 mm just to make it easy on the Coil packs.
Great plugs these Iridium, they'll last longer than my chassis

[N7GTX]

PhilH42 said:

Now I didn't really want to resurrect the argument again but I'd like to pick the brains of the few FI owners on here on their choice of plugs and findings.

So I moved to BPR7ES when I fitted the turbo from 6's but would quite like to try the 7eix plugs....anyone running these on FI and projected or not...anyone running hotter 6 or cooler 8 and any fouling problems on mixed driving?

Thanks in advance chaps.

I am still on the original B7ECS plugs as my Powers warranty runs until April. I change them each year regardless of mileage and never had a problem. But my boost can go as high as 18psi so I have not wanted to risk a claim by changing to another type; hotter, colder, projected or whatever.

[QBee]

Classic Chim said:

What gap are you employing Anthony, I was told I could go upto 1 mm but I've reduced it to 0.8 mm just to make it easy on the Coil packs.
Great plugs these Iridium, they'll last longer than my chassis

Je n'ai pas un scooby, mon ami.
I will check tomorrow.
Probably just the gap they came with

[Classic Chim]

[Classic Chim]

Which is about 0.7 to 1.0 mm from memory.
Yours looks a fat 1.0 mm as a paddy mate of mine would say

[PhilH42]

N7GTX said:

I am still on the original B7ECS plugs as my Powers warranty runs until April. I change them each year regardless of mileage and never had a problem. But my boost can go as high as 18psi so I have not wanted to risk a claim by changing to another type; hotter, colder, projected or whatever.

That's fair enough and much higher boost than mine, double in fact! What will you do after April though stay as is (don't change what's not broken and all that) or are you a little curious to try the eix's ?

[N7GTX]

PhilH42 said:

N7GTX said:

I am still on the original B7ECS plugs as my Powers warranty runs until April. I change them each year regardless of mileage and never had a problem. But my boost can go as high as 18psi so I have not wanted to risk a claim by changing to another type; hotter, colder, projected or whatever.

That's fair enough and much higher boost than mine, double in fact! What will you do after April though stay as is (don't change what's not broken and all that) or are you a little curious to try the eix's ?

I have been tempted by trying a long lasting iridium plug (60k service interval on some Toyota) but 2 things stopped me.
1. This thread prompted me to contact NGK technical for advice and they have responded on here. Basically, you can use the iridium 6 on most normal or moderately modified engines. On heavily modified they said stay with the old recessed 7.
2. To prevent detonation at high boost I must use Shell Nitro, BP Ultimate or a minimum of 98 octane fuel (no knock sensors) at a current price of around £1.25 a litre Oh, and the price of a Powers rebuild will make your eyes water so I'll bottle out and stick with the old plugs.

[QBee]

N7GTX said:

PhilH42 said:

N7GTX said:

I am still on the original B7ECS plugs as my Powers warranty runs until April. I change them each year regardless of mileage and never had a problem. But my boost can go as high as 18psi so I have not wanted to risk a claim by changing to another type; hotter, colder, projected or whatever.

That's fair enough and much higher boost than mine, double in fact! What will you do after April though stay as is (don't change what's not broken and all that) or are you a little curious to try the eix's ?

I have been tempted by trying a long lasting iridium plug (60k service interval on some Toyota) but 2 things stopped me.
1. This thread prompted me to contact NGK technical for advice and they have responded on here. Basically, you can use the iridium 6 on most normal or moderately modified engines. On heavily modified they said stay with the old recessed 7.
2. To prevent detonation at high boost I must use Shell Nitro, BP Ultimate or a minimum of 98 octane fuel (no knock sensors) at a current price of around £1.25 a litre Oh, and the price of a Powers rebuild will make your eyes water so I'll bottle out and stick with the old plugs.

Interesting. How modified is moderately modified, I wonder? I have always used super unleaded for track days, and run at 2.5psi on the road. But you have got me thinking. Will do some research...

[PhilH42]

N7GTX said:

I have been tempted by trying a long lasting iridium plug (60k service interval on some Toyota) but 2 things stopped me.
1. This thread prompted me to contact NGK technical for advice and they have responded on here. Basically, you can use the iridium 6 on most normal or moderately modified engines. On heavily modified they said stay with the old recessed 7.
2. To prevent detonation at high boost I must use Shell Nitro, BP Ultimate or a minimum of 98 octane fuel (no knock sensors) at a current price of around £1.25 a litre Oh, and the price of a Powers rebuild will make your eyes water so I'll bottle out and stick with the old plugs.

Totally understand your stance and I'd agree its probably a very sensible option in your circumstances but it does make me wonder what margin is put in there! In my experience (not specifically cars) everything now is very over engineered out of fear of litigation and I think that clouds the reality. I'm not doubting the experts advice but do you not cross the road ever again in case you get knocked over by a bus....I mean what's the real world risk of it actually happening and thats what I'd like to know to make an informed choice? It will happen to someone it always does but maybe the risk can be mitigated with more frequent change intervals and definitive boost or modification guidelines.

All this is not worth the punt of course unless you notice real everyday improvements.

Oh and bloody bad luck with the prang, no shame with some people, hope you manage to nail the *uck** to the wall.

Edited by PhilH42 on Wednesday 13th September 09:24