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saxon46

Plugs gentleman please

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Looking to replace the plugs on my 3.2 carrera....... wr4cc's would they be the plug of choice

thanks

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do you have catalyst? if not use these ...if yes wr5dc will do 

 

Ivan

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Any advantage for going for the high end plugs guys? The platinum or multi electrode? 

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Did a bit of testing on plugs 3 years ago.

Always surprised that the standard plug for a 3.2 is a hotter grade over the earlier CIS cars.

If everything is 100% - a NGK BR 10 EIX gave the best result in a single plug engine.

For day-to-day fit and forget Bosch Super 4 are very good.

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1 hour ago, Leicestershire said:

Did a bit of testing on plugs 3 years ago.

Interesting, do you mind sharing more details of this?

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here an official plugs list what you should use- above i made a mistake WR7DC should have been...

 

 

carrera spark pl.jpg

Edited by proporsche

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Would I be correct in saying the R in WR7DC indicates it’s a resistor plug? I’m having huge interference issues with a Canems ECU who recommend resistor plugs for this very issue. 

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I have resistor plug with no interference issues at all (that I'm aware of).

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You should use resistor plugs the connectors are made for those plugs

 

Ivan

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8 hours ago, jevvy said:

Interesting, do you mind sharing more details of this?

Just basic observations nothing too scientific.

Pulled car out from hibernation.

Ordered a set of super 4 as part of a service kit but was sent standard plugs. Made supplier aware of problem and a set super 4 was sent out in post. While cross referencing the 6 incorrect plugs I found that BR10EIX were a cross reference for other applications. I already had 4 new BR10EIX on the shelf. These are expensive motorcycle plugs at £15 each but inspired by the BS on various forums ordered 2 more to make a set.

My builds had always felt better on super 4’s and previous dyno sessions have always been carried out on these plugs. I put this down to the ability of a multi electrode to clear any contamination generated by dirty carbs and lumpy cams. 

Changing to the BR10EIX plugs just felt sharper. A power run to check engine health matched the best results from earlier runs. Lunacy on roundabouts etc becomes more instant with a cleaner throttle response.

Negatives

These are a very ‘cold’ plug. When stating to use the car this year they were unable to cope with the combination of old fuel laced with fuel stabiliser and a splash of 2 stroke oil, resulting in a temporary change back to super 4’s.

 

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