neil.cavanagh Posted August 7, 2008 Share Posted August 7, 2008 Guess it is time I changed the plugs on my k-series. (5 years old, 30K miles). What are the best ones to fit? Tuned vvc based trophy engine.... Link to comment Share on other sites More sharing options...
mav Posted August 7, 2008 Share Posted August 7, 2008 If you have the original MG rover ones, they should be good for a while yet... Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 7, 2008 Support Team Share Posted August 7, 2008 Neil - NGK BCPR7E or BCPR7ES. £10 for 4 from Halfords (maybe even cheaper elsewhere). Yellow SL #32 - member of Drowned Rat Racing Link to comment Share on other sites More sharing options...
Mark Durrant Posted August 7, 2008 Share Posted August 7, 2008 Neil I use NGK BCPR7ES . Do not fit Denso Iridiums as I found these fouled to easily Mark D Comp Sec Link to comment Share on other sites More sharing options...
Jason Plato Posted August 7, 2008 Share Posted August 7, 2008 BCPR7ES are suitable for more than 200bhp here is C7 TOP Taffia rear gunner Link to comment Share on other sites More sharing options...
7 wonders of the world Posted August 7, 2008 Share Posted August 7, 2008 NGK 8 grade precious metal electrodes with a 1.1mm gap - depending which ignition system your running. I'll check the part number tonight Too young to be old ! Link to comment Share on other sites More sharing options...
robmar Posted August 7, 2008 Share Posted August 7, 2008 DJ - they won't be needing them being 189.7 bhp 😬 Link to comment Share on other sites More sharing options...
Jason Plato Posted August 7, 2008 Share Posted August 7, 2008 aye - 189.7bhp @ 6200rpm 😬 here is C7 TOP Taffia rear gunner Link to comment Share on other sites More sharing options...
I.Mupferit Posted August 7, 2008 Share Posted August 7, 2008 Interesting comment about the Denso Iridiums as I have found these to be the only plugs that don't foul on my Duratec. Link to comment Share on other sites More sharing options...
neil.cavanagh Posted August 7, 2008 Author Share Posted August 7, 2008 Cheers guys!! and Rob I think you are confusing me with Mark with his 189.7bhp. Though with 60kg less mass I'm sure he would be willing to set his rev-limit to 6000rpm to even the score up a little... 😬 😬 😬 😬 😬 Link to comment Share on other sites More sharing options...
dannylt Posted August 7, 2008 Share Posted August 7, 2008 Brent - that sounds like a mapping issue, probably around cold start. I've had 4 or 5 new maps on my Caterham, and a couple of them caused fouling problems, one of them major (i.e. swapping plugs just to get engine warm enough). Both were sorted eventually. Iridium plugs are expensive, the only real reason is to get mega service intervals I think. Which is hardly an issue on our cars... Link to comment Share on other sites More sharing options...
I.Mupferit Posted August 7, 2008 Share Posted August 7, 2008 Hmmm, could well be mapping as it only started doing it after the new engine was mapped back in March. Hotter plugs improved it but not completely so I read up on this issue and it seemed that Iridium plugs would give a cleaner burn with less tendency to foul up - allegedly. Anyhow, I bought some and they are, indeed, considerably better than the standard NGK's in this respect and haven't fouled yet. My son has also tweaked the map a bit to even out the peaks and troughs in the graph and that also made the engine run more smoothly so maybe we just need to spend some more time on it and I can go back to the cheaper plugs! 😬 Link to comment Share on other sites More sharing options...
steve and casper Posted August 10, 2008 Share Posted August 10, 2008 Talking of ignition issues.Any ideas why my recently aquired superlight goes into hunting mode on starting up ,it just revs on idle betwen 500 and 1500 rpm which is a tad tiresome and somewhat disconcerting Link to comment Share on other sites More sharing options...
Tony Whitley Posted August 10, 2008 Share Posted August 10, 2008 Usually a problem with the IACV (or less likely, the throttle pot, you'd know if it was that as the engine would run like a dog) - the ECU has a fallback mode where it winds the idle speed down until it almost stalls then turns up the wick again over and over (by controlling the injectors I suppose). Edited by - Tony Whitley on 10 Aug 2008 11:46:32 Link to comment Share on other sites More sharing options...
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