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Old 12-08-2014, 04:47 PM   #16
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yes sir... the RB#5 works good and #6 I think.. can't remember all the way, it has been a while..lol and yes, the OS#8 plug are too short and would give you some tuning problems..
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Old 12-08-2014, 07:58 PM   #17
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Originally Posted by mercfocus View Post
Which RB plug?
I found these:


And thereís this LRP that looks like it might be good:


The Duratrax Carbons Iíve been using are short too. Iím wondering if thatís been part of the problem.
If youre running a short plug in a long plug button, that will cause some issues. Youre loosing a lot of compression that way. Try an OS LC3.
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Old 12-14-2014, 03:32 PM   #18
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Originally Posted by merdith6 View Post
I just remember coming across several of those engines back in the day they came in hyper OFNA cars I think. Not one ran good. Could have been worn out but every one of them, Possibly. As far as tuning I have been helping racers tune .21 buggy engines for about 15 years. I started out with inexpensive force 4 and 6 port Taiwan engines about 20 years ago and they ran without issues for a long time. The hyper engines just had terrible carbs and lost compression quickly in my opinion. I always recommended they get another engine. It ran crappy. end of story.
My comment was not intended to sound quite as obtuse as it did.
I have ran/tuned/modified/used many of these engines and still do. There are many different types of this engine and they all use the same carb. I find the carb. to be adequate and the piston/sleeve fitment is usually good for at least twenty litres of fuel.
Sure it is never going to compare to the latest three hundred dollar mill, but for the money it is fine.
End of story.
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