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Jun 19, 2012 21:26:54 GMT
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any good ?any difference in running?
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Jun 19, 2012 22:26:54 GMT
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Define "performance plugs".
If you have a tuned engine you might need a different grade of plug (ie colder, to stop them overheating).
Fine-tipped Iridium plugs supposedly allow a slightly more consistant, more complete burn, with a smoother idle. That's from a guy who's opinions regarding engine tuning I trust - and confirmed by the short-term variation reading on his wideband lambda sensor. They also last ages - but cost a lot - and will still get fouled by poor fuelling or burnt oil just as fast as regular plugs.
I don't think he noticed much difference in terms of power or economy though.
TBH, in a boggo engine - or any engine that's burning oil - I wouldn't bother. However, I would recommend Denso plugs over and above NGK: I've come across a few issues with NGK plugs just lately (eg duff plugs in new batches, and not recovering well after being flooded).
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ChasR
RR Helper
motivation
Posts: 10,195
Club RR Member Number: 170
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performance spark plugsChasR
@chasr
Club Retro Rides Member 170
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Not really  . On my Porker which came with Nology Silver Plugs on the second engine(they are over £10 a plug!) it ran no better, and used no less fuel when compared to the stock Bosch plugs. What does help however is having the entire ignition system in order with good quality parts  . On the Stag, going from a brand new 'Country' coil to the old Bosch Super red coil cured a few running issues as an example. |
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Raoul Duke
Part of things
Posts: 990
Club RR Member Number: 117
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performance spark plugsRaoul Duke
@raoulduke
Club Retro Rides Member 117
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Allegedly the plugs with 3 or 4 grounds might possibly last longer, supposedly, because there's only ever one spark therefore they might perhaps wear out more slowly? Notice how positive I am about that. I'm afraid my plugs tend to get slightly wrecked long before natural 'wear' takes its toll...
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...a redder shade of neck on a whiter shade of trash...
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"Splitfire" spark plugs always gave Mini's and MGB's a few extra horsepower. i couldn't believe it myself so on one car i swapped the standard plugs four times with Spltfire plugs and every time the Splitfires would show an extra four horspower.  they didn't seem to make any difference on any other cars though which was odd. so there is something in the A series and B series engines that liked a different style plug. |
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Jun 20, 2012 12:28:27 GMT
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unless your running a high boost or high compression motor i wouldnt waste money on "performance" plugs tbh
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if at first you don't succeed...use a gas axe!
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Jun 20, 2012 17:35:22 GMT
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Another vote for the Splitfires from me. My twin SU'd Metro R6 1.4 16v was up on power by a few horse, ran more smoothly, was better on juice and the plugs were still in it when I sold it.
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Jun 20, 2012 17:51:15 GMT
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A few years ago i put Bosch Super4 plugs in the panda, and instantly you could feel more power and the fuel economy went up. The car is still running on the same plugs and the car still purrs on then
(if anybody thinks the old plugs might have needed replacing, they were Champion Copper core and were less than a year old when changed)
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1993 Fiat Panda Selecta
2003 Vauxhall Combo 1.7DI van
2006 Mercedes Kompressor Evolution-S AMG SportCoupé
"You think you hate it now, wait til you drive it"
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rutts
Part of things
Posts: 10
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Jun 20, 2012 18:34:32 GMT
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i used denso iridium plugs in my modified c20xe engined manta. i did not give a hoot on fuel saving but it ran fantastic and never missed a beat. get them bought but as above make sure you have good plug leads (magnecore) good quality bosch coil and new cap and rotor if used.
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scruff
Part of things
Posts: 621
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It depends on where the worst bit of your ignition system is.
Clearly correctly specced plugs will improve power over incorrect plugs, however, if they aren't the limiting factor in your ignition system you will not see any change.
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1994 Lotus Esprit - Fragile red turbo with pop up lights.
1980 Porsche 924 - Fragile red turbo with pop up lights.
I spy a trend...
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Jun 21, 2012 17:22:34 GMT
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It depends on where the worst bit of your ignition system is. Clearly correctly specced plugs will improve power over incorrect plugs, however, if they aren't the limiting factor in your ignition system you will not see any change. I'd agree with that. |
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. On my Porker which came with Nology Silver Plugs on the second engine(they are over £10 a plug!) it ran no better, and used no less fuel when compared to the stock Bosch plugs.
. On the Stag, going from a brand new 'Country' coil to the old Bosch Super red coil cured a few running issues as an example.
