spark plug replacement, how often?
#1
I read your email
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spark plug replacement, how often?
Just wondering how often you guys replace your spark plugs? I've read where some guys replace 'em at every oil change, but that seems a wee bit excessive to me. I've had mine in for about 9k miles so far and upon inspection the actually look okay. Is it time to change 'em or what?
#2
Registered Piston Eater
i know rotaries go through plugs extremely fast but i dont know why, and i am one of those people who has to know why...so......why? every oil change sounds too often unless you take your 7 to the track all the time or race it like everyday. im not sure how long they are supposed to last if you drive normally, but then again, most people with 7's dont
#6
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Originally posted by jr69187
Why i was told the plugs wear out is due to the fire three times as much as a piston plug.
Jr
Why i was told the plugs wear out is due to the fire three times as much as a piston plug.
Jr
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#9
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Originally posted by REVHED
You're almost right... they only fire twice as often.
You're almost right... they only fire twice as often.
#10
Aussie Rx7 Freak
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#11
Registered Piston Eater
I have the denso 4 prong ones in now. they get dirty real quick, im thinking of switching to NGK. so say you have a rotary and a piston engine that both are driven with the same stress on them and have the same brand of plugs, how long should the rotary ones be replaced if the piston ones are supposed to be at 50000 miles?
Last edited by The_7; 07-31-03 at 11:05 AM.
#12
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Probably a bit of just over-maintenance, but, I mean if they want/can afford to do it, I guess nice clean spark plugs are better than older, somewhat burned out ones..... 2000miles seems maybe a little excessive, but hey can't really fault them for looking after their Rotary. I've always stuck to the NGK plugs. A litter more expensive than the Denso one's but from what you get out of them, worth it IMHO.
#13
Lapping = Fapping
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Sort of, the 4 times more than a piston thing. Or you can look at it this way. Ahem. Direct fire with 0º and 180º sparks on the Leading plugs causes them to fire twice as often. They will most likely wear twice as fast. If that happens, you'll only need to buy two new plugs instead of all four.
#14
Rotoholic Moderookie
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If you only drive your Rx7 in the summer (like I do/will) Once a year should be good. I figure if a piston changes at 50,000 I'll change my plugs at a little under 20,000km (what I put on my daily driver every year, which INCLUDES winter, though I'll probably do more driving with the Rx7 in summer to make up for it).
For the price of plugs (like $20 CDN for all four) once a year is nothing.
We'll see how it turns out.
Jon
For the price of plugs (like $20 CDN for all four) once a year is nothing.
We'll see how it turns out.
Jon
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