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RB S5 - what plug?

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Old 11-03-2018, 04:45 PM
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Default RB S5 - what plug?

I am still running on old RB S5 English engine but I am out of plugs.
i ran it today for the first time in 5 years with the 5 year old plug and and it started right up. I think 8 got the idle right but I kept flaming out after a few minutes. I checked the plug and it doesn’t burn all the way to the tip so probably time for a new plug before trying to tune the engine.

trying to research on the net and some say I can use the OS P3 plug, but the P3 doesn’t fit being a turbo plug and totally different thread.

Any plug recommendations for plug for this engine?
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Old 11-03-2018, 05:49 PM
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Something like a Novarossi C6G should serve you well.
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Old 11-04-2018, 02:50 AM
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Hey Berki,

so the S5 needs the normal plugs instead of the Turbo plugs, right?
I don´t know this engine, but i have a RB S9 somewhere in my boxes.
I tried some different glowplugs on that S9 engine.
The most important thing you have to pay attention to, is that the RB glowplugs are slightly longer than fore example a OS A5 (A8).
I used OS LC3/4 plugs (these have nearly the same lenght as the RB plugs) in my RB engine. Worked very well.
I also heared that the Nova plugs are "a long version" and should be a fit, but i have no experiece with those plugs.
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Old 11-06-2018, 01:55 PM
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Thanks for the responses, much appreciated!
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Old 11-07-2018, 05:15 PM
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I ran McCoy MC8 plugs on S7 and S5s.
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Old 11-12-2018, 03:24 AM
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Novarossi glowplus i think it's the most accurate
Standard glowplugs
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Old 11-16-2018, 04:46 AM
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I’m not a nova based expert but I’ve had experience with a few, stick to a nova brand plug that’s either made by rb or any other brand that runs Novarossi plugs! They are the best. Second best I would say is a O’Donnell plug as they also run a lot of plugs made for the deck height of a nova based engine. If u can’t find any of those then look into a McCoy plug for standard size. You can look up the recommended plug and check dimensions, you will probably notice they are a bit different then os brand plugs because the deck heights more then likely are different. Same with turbo, u run nova/O’Donnell with any nova based engine and os/sirio based plugs with os/sirio based engines.
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Old 11-16-2018, 05:05 AM
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Agreed.
​​​​​​
For that engine you can run Rossi r3/r4 or if you can find the novarossi c6s. That's for hot ambient temperatures, go down to c5s if colder outside. You'll be set from 10°c-30°c and common nitro contents.
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