Plug Gapping @ high boost
22 June 2003, 06:37 PM
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If Iridium plugs are fitted with Bosch Coil Packs, is there any advantage to increasing the plug gap?
I was under the impression that the point in having iridium (harder wearing) plugs and better coilpacks was that you could successfully produce a bigger spark without it being "snuffed" by the higher boost pressure, and that a bigger spark resulted in better combustion ergo more/smoother power.
So when I fit them, should I go for the standard 0.7, or bigger?
I was under the impression that the point in having iridium (harder wearing) plugs and better coilpacks was that you could successfully produce a bigger spark without it being "snuffed" by the higher boost pressure, and that a bigger spark resulted in better combustion ergo more/smoother power.
So when I fit them, should I go for the standard 0.7, or bigger?
no one?
23 June 2003, 11:31 AM
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Steve
I've found that bosch coils/plugs would only allow a boost increase whilst maintaining a set gap. Opening the gap any further brought back a misfire. You could probably do one or the other but not increasing gap and boost.
The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs.
Andy
I've found that bosch coils/plugs would only allow a boost increase whilst maintaining a set gap. Opening the gap any further brought back a misfire. You could probably do one or the other but not increasing gap and boost.
The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs.
Andy
23 June 2003, 01:45 PM
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That's cool: Thanks for the help.
I just didn't want to be gently destroying the nice new plugs with a larger voltage than needed. As I will be increasing the boost, I'll leave them stanard.
Thanks again.
I just didn't want to be gently destroying the nice new plugs with a larger voltage than needed. As I will be increasing the boost, I'll leave them stanard.
Thanks again.
23 June 2003, 02:36 PM
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Andy,
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
23 June 2003, 02:40 PM
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Andy,
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
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23 June 2003, 02:42 PM
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Andy,
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
23 June 2003, 02:44 PM
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Andy,
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
"The later cars seem to be able to run a wider gap, I think this is due to a better ignition amp rather than the coils or plugs."
I suspect this phenomenon could also be related to the improved head design on the later engines.
Moray
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