Cosworth spark plugs
30-07-2005, 07:53 PM
#1
PassionFord Post Whore!!
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Cosworth spark plugs
Which ones do u guys reccomend, i may go for the ford ones i think the model number is somthing like agpr... are they good?
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30-07-2005, 10:42 PM
#8
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i only stick the best in my cossy wich is the pp8 plugs and i have tried every plug and so far its pp8 all the way m8 ..but apr6fs are not even listed for a cossy but people still use them but if you whant the best then its the pp8 .will cost you Ł38 a set mine are 1 year old never missed a beat
30-07-2005, 10:56 PM
#9
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APR6FS is a Pinto style plug with a 18mm thread and tapered seat, so you have nooo chance of fitting it in your cossie! Even if you could' it is way too hot a heatrange for that application - a standard NGK plug needs to be at least an "8" heat range to even start being suitable.
Ford Motorcraft AGPS071C is the plug that ultimate sleeper is probably thinking of - listed as RS Turbo application by Ford, at least as good as pp8's and less than Ł12 from your friendly Ford dealer
Ford Motorcraft AGPS071C is the plug that ultimate sleeper is probably thinking of - listed as RS Turbo application by Ford, at least as good as pp8's and less than Ł12 from your friendly Ford dealer
31-07-2005, 12:11 AM
#10
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I use the standard Big turbo Escort Cossie plugs gappaed at 0.6mm in my Stage one Saff and have NEVER had any problems 
They come in a Motorcraft box but are made by DENSO NIPPON & I think they are something like Ł11 each, but i work for fords and get a HUGE discount on them, so i get the set for about Ł17
They come in a Motorcraft box but are made by DENSO NIPPON & I think they are something like Ł11 each, but i work for fords and get a HUGE discount on them, so i get the set for about Ł17
31-07-2005, 09:05 AM
#12
Norris Motorsport
PP8's are a good plug BUT only suitable for std and stage 1 cars as they are a reasonably hot running plug and thus are not suitable for power outputs over around 280bhp.
O71's are a reasonable plug in terms of heat rating but I do not recommend them as the short reach on the ground electrode means that the centre and and ground electrodes wear quickly (Due to material and surface area proximity) which if not checked and gapped on a regular basis can cause miss fires.
O71's are a reasonable plug in terms of heat rating but I do not recommend them as the short reach on the ground electrode means that the centre and and ground electrodes wear quickly (Due to material and surface area proximity) which if not checked and gapped on a regular basis can cause miss fires.
31-07-2005, 03:23 PM
#16
just finding my feet
I have put the 071's in mine and it runs lumpy at idle.
071's are listed as a replacment erst plug, my not last for ever but are dirt cheep to buy
31-07-2005, 09:44 PM
#18
Team HOTHOT!
Originally Posted by Stu @ M Developments
The Denso Iridiums i sell are the "best" plugs. 
altho i may need another set Stu, as mine are now swimming head high in oil due to a poxy paper gasket
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