sorry if this is the wrong room



as with any used car i buy i like to give it a good service for a piece of mind this Si seems well looked after considering the recipts and oil on the dipstick is clear

but just wondering what spark plugs people are using in NA silvertops i know i had NGK copper core ones in my last Si which seemed great but that was some years ago and theres the new super 4 on the scene

ive been using them in my volvo turbo and seem fine (ive heard they are no good for high boost though 20+ psi) obv no problem in an NA engine

I've heard they help the car pull better on hills

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She's still alive! -23/02/2017

I am running super 4's, in a C2 admittedly but they do seem to be a very good plug I can't say anything bad about them.

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ive seen a company on ebay doing them £11 + postage which is cheaper than motorfactors/halfords

just stick with the ngk copper core, dont use champion plugs

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I just use bosch ones lol

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NGK everytime mate

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FEED ME MORE!!!!

ngk win win

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fifi

Did you know that there can only be one arc at a time when your spark plug fires, you will never have two, three or four electrodes fire at once. The double and quads only have an advantage if the plug becomes "fouled" on an electrode, then one of the others will be able to continue in a best case scenario - heard of the term longlife plug?

There are other things to spark plugs; heat ratings, gap setting be quite important.

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http://www.fiestamk7.com - A forum dedicated to the Fiesta Mk7 - 1 year old and going strong!
http://www.fiestamk3parts.com/ Info and guides on the Mk3 Fiesta

I like boost! Formerly cookie456_the2nd

Can't remember what's on mine but I got them from halfords.

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I currently have NGK with a heat range of 7, but I'm going for heat range 8 when I service next just for piece of mind.

Heat range is the key, don't get sucked into all the marketing nonsense.

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Rest in peace Ben "Jam" Elvin. Gone but never forgotten.

how did ypu find out the heat range for the plug mate

It's usually in the numbering for the code with NGK, not sure on others.

http://www.ngksparkplugs.com/tech_suppo ... ugs/p2.asp

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Rest in peace Ben "Jam" Elvin. Gone but never forgotten.

I knew this when I bought mine, as you say they should last longer but also its never bad to have a few routes, by definition the the route with the least resistance will work and this can vary so they can give a better spark constantly.

Either way they work well for me, but I do wonder how many do think all 4 spark at the same time.

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