Does anyone know where I can buy a Bowman Ring for my DLE-30?
Thanks, Aframe2

Direct from the "Master" himself...... [email protected]

thanks, tande. aframe2

The new DLE 30cc engines should not need a NEW ring, give it time to break in. Capt,n

Captainjohn,

Have they changed their ring design or metallurgy?

Did we need another thread on this. Search "Bowman ring"

raptureboy,

You always have the option of not reading/subscribing!

DLE changed their rings

I have two Dle-30s. One I've had almost three years and the other one just over a year. How will I know if they
have the old ring or the new ring? Aframe2

If you want to freshen it up, throw a Bowman ring in it, they aren't that expensive and are usually better than the stock rings in any engine.

If you ever run the engine....you may find out it runs OK and does not need a new piston ring. If it runs good...that all that is necessary!!!!!!!

Captn, one engine has never been started, so I guess I'll fire it up and
see what it does, the other engine runs fine but has a persistent miss
that is very annoying and embarrassing at the field, if you know what I
mean. I've tried everything from different gaps in the plug and tweaking
the carb fuel mixture, but the miss is still there. I would like to remedy
that condition. If the Bowman ring will do that I will gladly opt for that
solution. aframe2

Sometimes an annoying miss can be using the original non-CM-6 plug they send with the engine. Those are well-known to create many different issues. If already changed, you may want to ensure that the voltage source to your ignition module isn't "dropping out", particularly if being driven by a regulator/ubec of unknown reliability. I think most of us equate a 'miss' to an ignition-related(or plug) issue.

Why do you need to know?
The miss you experience is not caused by the ring I can assure you. It is an ignition matter.

Changing out the stock ring to a Bowman ring is really about personal choice. Bowman rings will seat tighter and the ring gap is less. These qualities are preferred by many because it will increase the performance of the engine and by a descent amount. My last ring conversion went into a DLE 55 and the top rpm increased approximately 500 rpm. Plus the idle and transition became even smoother. So, "No" it's not a necessity, but is a nice performance mod. Of course this is IMHO and I'm sure others will differ.</p>

  But hey, I do this for me.</p>

what battery are you running on that engine with a miss. The older DLE 30's do not like voltages above 5 volts. Even a fully charged 4 cell nimh would give my DLE 30 a miss till the voltage dropped to 5 volts.

Is there a web site?

No.

does anyone have a currant list of engines he has rings for?

Email him...
[email protected]

Kerwin50, I am using a jr 4.8v ignition battery. Mine goes the opposite way. The first few flights run great with
no miss at all. Then all of a sudden it will start to miss a little on the next flight. Then continue to get worse
on the next succeeding flights.The engine never quits but the miss is annoying. Aframe2

Have you checked the timing on the engine? Too much advance can cause rough running (missing). You and others have mentioned several things that have been checked ... but how a bad plug cap. If the insulation in the cap is damaged or broken down (usually by a rough landing where the cap hits the ground) the engine can run rough with an intermittent miss. You might just try a different ignition just to rule that out a a source of the problem.

If it is a JRNiMh, that sounds somewhat typical....voltage probably dropping under load after a couple flights. If NiCad, could have "memory", maybe....either way - what you have is ignition-related, very little doubt with the extra info you just provided. Truckracer is right on - if you have a spare ignition, try it....spare battery, try it....

Thanks, Bob and the rest for the advice. I will try another ignition and another battery. Aframe2

Yes first thing is to put in a NGK-CM-6. Spark plug.You might retard the timing a few degrees some are timind way to far advanced. Move the sensor counter clockwise same way the engine turnes. If engine has good compression Bowman ring will not cure the miss.
I do have bowman rings in nearly all my engines.
Dle did change there rings some time ago and they are much better now.
BCCHI