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Old 04-02-2009, 07:53 PM   #1
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Default Blowing glow plugs?

Hey guys,

As the title states I am blowing glow plugs very fast. It seems like 1 every few tanks and I did get a faukty ine right out of the package once. I am using an os 8 in my grp non-tuned engine and my engine temps are right at 200 or a bit beloow. I have about 1/2 to 3/4 of a gallon through the engine. Since its relatively new could this affect it?

Also I realized today when I started my buggy up there were small bubbles coming from the sides of the glow plug? Is this bad?
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Old 04-02-2009, 07:55 PM   #2
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Use an O'donnell 77 or 97 and your good
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Old 04-02-2009, 07:57 PM   #3
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whats wrong with the os 8, just want to know? Also the 97 I find on amain is a turbo plug and mine takes regular? But its only 6 bucks so is it really a turbo plug? And the 77's say they are for 1/10 scale??
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Old 04-02-2009, 07:59 PM   #4
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too short and they're not sealing properly (bubbles)
the os 8 is for os engines only because only is uses the short body plugs
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Old 04-02-2009, 08:00 PM   #5
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oh alright, so is the 97 a turbo plug or will it work? Also is the 77 a 1/10th plug?
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Old 04-02-2009, 08:02 PM   #6
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nope the turbo is 97t
it doesn't matter that it says 1/10 on it if you need a hot plug (which i recommend for better idling) it works fine. Its the only plug i run no matter how hot or cold it is outside
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Old 04-02-2009, 08:04 PM   #7
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Ok so is there a non-turbo 97 plug? Also will my engine have had any damage caused by using the os 8 plug? Would it have performed to potential with it?
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Old 04-02-2009, 08:17 PM   #8
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97 is the standard plug
short plug=less compression=not performing to full potential
no damage just not full potential
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Old 04-02-2009, 08:20 PM   #9
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awesome, this thing rips with the os 8, cant wait for the new plug. Also cant find the 97 anywhere?
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Old 04-02-2009, 08:22 PM   #10
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If you can't find the 97, you could also try the McCoy MC-59 or MC-8. I have had pretty good luck with the mccoy plugs too, and they are cheap.

You definately don't want an OS plug in that engine
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Old 04-02-2009, 08:22 PM   #11
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ya I was just about to ask how the McCoys were, will they perform the same as O'donnels?
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Old 04-02-2009, 08:23 PM   #12
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Quote:
Originally Posted by rgrassey@me.com View Post
ya I was just about to ask how the McCoys were, will they perform the same as O'donnels?
Yup they will do just fine.
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Old 04-02-2009, 08:24 PM   #13
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I think the OS 8 plugs are great. They can be run in any engine if you want too, but can be harder to tune in non-OS engines due to being short and desinged for an OS chamber. I ran them and MC-59's in my STS and I was having the same problem you were at the same amount of Nitro through my engine. I like the MC-59's they seem to be easier to get a tune with.

I was fine then one day just started blowing left and right. This was after my first initial tune after break in. Your engine is probably finally starting to settle and getting fully broke in and the tune changed on you.

Turned out I needed to make my bottom end richer and lean the top a little more. I was blowing them every 1/2 tank to full tank.
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Old 04-02-2009, 08:25 PM   #14
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I never had luck with McCoys. Try them and if they work for you then awesome.
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Old 04-02-2009, 08:25 PM   #15
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what plug should i run with my rb ws7-2 (the old version) its a standard plug motor..
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