Spark plug choice for classic Impreza turbo? Have to replace them every 1000miles!
#1
Spark plug choice for classic Impreza turbo? Have to replace them every 1000miles!
Basically i have to change the spark plugs in my Classic every 1000miles due to get a misfire feel until car is warm on light throttle, once warm engine all smooth and on boost is all fine. I know this is a plug fault as change them and is all ok for another 1000miles. when take them out all look correct colouring and all same colour.
Always use Laser plat PFR7B, just wondering if I went for more expensive to buy spark plugs ie HKS super fire m series, would I get the same 1000miles before need changing?
Running 1.6bar boost, catch can, mapped etc etc etc.
Also would people recommend changing heat range from 7 to 8?
Cheers
Always use Laser plat PFR7B, just wondering if I went for more expensive to buy spark plugs ie HKS super fire m series, would I get the same 1000miles before need changing?
Running 1.6bar boost, catch can, mapped etc etc etc.
Also would people recommend changing heat range from 7 to 8?
Cheers
#5
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You could try an R7434-8 'racing' plug although not cheap at over £100 per set.
I would avoid the HKS plugs as they are just rebranded Denso items, and have been known to crack the ceramic surrounding the tip.
I would avoid the HKS plugs as they are just rebranded Denso items, and have been known to crack the ceramic surrounding the tip.
Last edited by FB Tuning; 12 December 2010 at 09:42 PM.
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