Omega Owners Forum - What plugs to fit in my 3.2?

Marks DTM Calib

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Re: What plugs to fit in my 3.2?
Reply #60 - 12. May 2011 at 10:41

chrisgixer wrote on 12. May 2011 at 09:47:

And we're discarding them over the benefits because of that...?

Thats the key thing, there are no REAL benefits as the quads require attention before the 80k interval is reached due to them working loose.

In addition, there is the potential for them to slow the flame front.

Hence, you can infer that they are not worth bothering with. Thumbs Up!

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Lazydocker Omega King Offline Victim of Pinky's Power Trip! Posts: 11336 Woodbridge, Suffolk Gender: Drives: 2003 3.2 Elite Estate LPG Converted, inspected and Certified	Re: What plugs to fit in my 3.2? Reply #61 - 12. May 2011 at 11:15 I knew someone with better knowledge would explain it better I'll stick with the whatever I get as they'll only be in a year or so anyway
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chrisgixer

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Re: What plugs to fit in my 3.2?
Reply #62 - 12. May 2011 at 13:29

Marks DTM Calib wrote on 12. May 2011 at 10:41:

chrisgixer wrote on 12. May 2011 at 09:47:

And we're discarding them over the benefits because of that...?

Thats the key thing, there are no REAL benefits as the quads require attention before the 80k interval is reached due to them working loose.

In addition, there is the potential for them to slow the flame front.

Hence, you can infer that they are not worth bothering with. Thumbs Up!

Depends if we believe the shielding theory. I wouldn't leave them in for 80 k anyway esp with lpg, as suggested earlier. Previous set where loose on other car, but I didn't know of the issue when I installed them, so didn't re tighten after the initial torque (25nm is it? ) when the washers relaxed.

It's only a potential shielding after all. I don't buy it personally ESP given the gap that's bigger than I visualized. But it's been an interesting topic. ESP if it windes Andy B up Grin

. sorry Andy Wink

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Marks DTM Calib

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Re: What plugs to fit in my 3.2?
Reply #63 - 12. May 2011 at 14:38

chrisgixer wrote on 12. May 2011 at 13:29:

Marks DTM Calib wrote on 12. May 2011 at 10:41:

chrisgixer wrote on 12. May 2011 at 09:47:

And we're discarding them over the benefits because of that...?

Thats the key thing, there are no REAL benefits as the quads require attention before the 80k interval is reached due to them working loose.

In addition, there is the potential for them to slow the flame front.

Hence, you can infer that they are not worth bothering with. Thumbs Up!

Depends if we believe the shielding theory. I wouldn't leave them in for 80 k anyway esp with lpg, as suggested earlier. Previous set where loose on other car, but I didn't know of the issue when I installed them, so didn't re tighten after the initial torque (25nm is it? ) when the washers relaxed.

It's only a potential shielding after all. I don't buy it personally ESP given the gap that's bigger than I visualized. But it's been an interesting topic. ESP if it windes Andy B up Grin

. sorry Andy Wink

Lol, its a slow down of the flame front, which I can see happening as the flame is shielded from the mix on the outer part of the electrode. The actual initial ignition wont be any different.

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Andy B

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Re: What plugs to fit in my 3.2?
Reply #64 - 12. May 2011 at 15:30

chrisgixer wrote on 12. May 2011 at 13:29:

.... ESP if it windes Andy B up Grin

. sorry Andy Wink

Doesn't bother me either way. Wink

I've had twins in, fitted quads and replaced them after nothing like 80k & gone back to twins. I've never had plugs come loose (last time I had a loose plug was 1980 in my GT250 Grin

& that was a single.)
IMO once the flame front has set off, the spark plug has no further influence whether it's a single, twin, quad or even 2 plugs like her Smart.

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Kevin Wood

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Re: What plugs to fit in my 3.2?
Reply #65 - 12. May 2011 at 15:46

It really isn't worth 5 pages of worrying about, IMHO. Wink

If the flame front is delayed, the effect is to slightly retard the ignition timing. Given that the car was sold with quad plugs that's probably what the engine was running when the ECU calibration was made, so, if there's a significant effect, it's already compensated for.

Kevin

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Andy B Over Active Poster Offline Posts: 21988 Bury Lancs Gender: Drives: 1999 3.0 Elite auto/TDM	Re: What plugs to fit in my 3.2? Reply #66 - 12. May 2011 at 15:49 Kevin Wood wrote on 12. May 2011 at 15:46: It really isn't worth 5 pages of worrying about, IMHO. ...... Who's worried?
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TheBoy

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Re: What plugs to fit in my 3.2?
Reply #67 - 12. May 2011 at 16:12

Kevin Wood wrote on 12. May 2011 at 15:46:

It really isn't worth 5 pages of worrying about, IMHO. Wink

If the flame front is delayed, the effect is to slightly retard the ignition timing. Given that the car was sold with quad plugs that's probably what the engine was running when the ECU calibration was made, so, if there's a significant effect, it's already compensated for.

Kevin

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

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Kevin Wood Global Moderator Admin Team Offline Posts: 20377 Alton, Hampshire Gender: Drives: 3.2 MV6 (LPG), Westfield	Re: What plugs to fit in my 3.2? Reply #68 - 12. May 2011 at 16:15 TheBoy wrote on 12. May 2011 at 16:12: retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood .. Only if they didn't calibrate the ECU with the quads. TBH, it's all speculation, though. A back to back test is the way to sort things like this out.
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TheBoy

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Re: What plugs to fit in my 3.2?
Reply #69 - 12. May 2011 at 16:16

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

A race? I wouldn't be so immature Roll Eyes

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Lazydocker

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Re: What plugs to fit in my 3.2?
Reply #70 - 12. May 2011 at 16:21

TheBoy wrote on 12. May 2011 at 16:16:

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

A race? I wouldn't be so immature Roll Eyes

Brackley to a meet perhaps Lips Sealed

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chrisgixer

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Re: What plugs to fit in my 3.2?
Reply #71 - 12. May 2011 at 17:02

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

Bah, there'll be feck all difference. So may as well have the extra life, as Mr Gm intended.

I'll fit quads, well, I have already, knowing LPG was on the way it obviously makes sense to check your ignition system first. BEFORE the install. Roll Eyes

There in lies a clue. Wink

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Re: What plugs to fit in my 3.2?
Reply #72 - 12. May 2011 at 17:04

chrisgixer wrote on 12. May 2011 at 17:02:

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

Bah, there'll be feck all difference. So may as well have the extra life, as Mr Gm intended.

I'll fit quads, well, I have already, knowing LPG was on the way it obviously makes sense to check your ignition system first. BEFORE the install. Roll Eyes

There in lies a clue. Wink

Some smart arse said it would have made sense to do the cambelt as well

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Lazydocker

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Re: What plugs to fit in my 3.2?
Reply #73 - 12. May 2011 at 17:05

chrisgixer wrote on 12. May 2011 at 17:02:

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

Bah, there'll be feck all difference. So may as well have the extra life, as Mr Gm intended.

I'll fit quads, well, I have already, knowing LPG was on the way it obviously makes sense to check your ignition system first. BEFORE the install. Roll Eyes

There in lies a clue. Wink

Ahh... So it was related to the EML we managed to get up then Cheesy

I've got quads on order and the mileage on them will be pretty similar if TB changes the twins at the same mileage I change the quads (because I'll get there before him Roll Eyes

) at, shall we say 30k, and we'll ask the master to do a direct comparison Thumbs Up!

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TheBoy

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Re: What plugs to fit in my 3.2?
Reply #74 - 12. May 2011 at 17:06

Lazydocker wrote on 12. May 2011 at 17:05:

chrisgixer wrote on 12. May 2011 at 17:02:

Kevin Wood wrote on 12. May 2011 at 16:15:

TheBoy wrote on 12. May 2011 at 16:12:

retarding the ignition sounds like taking away some of my precious GGs.... ....so that be fighting talk, Mr Wood Tongue

.. Only if they didn't calibrate the ECU with the quads. Wink

TBH, it's all speculation, though. A back to back test is the way to sort things like this out. Wink

Bah, there'll be feck all difference. So may as well have the extra life, as Mr Gm intended.

I'll fit quads, well, I have already, knowing LPG was on the way it obviously makes sense to check your ignition system first. BEFORE the install. Roll Eyes

There in lies a clue. Wink

Ahh... So it was related to the EML we managed to get up then Cheesy

I've got quads on order and the mileage on them will be pretty similar if TB changes the twins at the same mileage I change the quads (because I'll get there before him Roll Eyes

) at, shall we say 30k, and we'll ask the master to do a direct comparison Thumbs Up!

Mine get changed bi-annually normally, so around 20-25k... ...that said, TBE doesn't do many miles....

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