+1:nod::nod::nod:

Just some info for the odonnell engine owners .

The SS.21 as you are aware comes with an odonnell 97T glow plug.After extensive testing ,Steve Odonnell Has found that this plug gives you the maximum performance and superb durabilty.

please remember flames outs occur and blown plugs happen for many reasons.

1.Wrong plug selection(wrong temp)
2.Change of fuel(brand,blend)
3.Stretched conrod.(must be changed After 7 litres)
4.To rich
5.To lean
6.Different brand of plug.
7.Your engine has finally bedded in .
8.High level of nitro without re-shimming
9.Not enough oil content (castor and synthetic must be used not only synthetic.
Recommended (9% synthetic,3% castor)and a maximum of 30% nitro.Engine is already set for
25% nitro using anything higher you must re-shim engine with a .1-.2 of a thou shim.
10.Different brand and temp glow plugs will drop your idle which will need to be reset so will the finalbedding in of your engine (can happen anytime 5 litres or even 50 litres there is no time frame

It is very important to re-tune your engine if you use different branded plugs and types .This is very important and the re-tuning must not be done during a pitstop during a race it takes time to re tune (or use the same brand and temp plug and retune to a different plug when racing is completed)

Also when you change your restrictor the engine needs to be re-tuned 7mm is already installed when you go to the 8mm or even 8.5 (not supplied) restrictor everything changes and you must
re-tune your engine (richer mixture) .
Dont be aggressive with the idle ,lsn and hsn needles as you will damage the screws plus the rubber o rings.

Alot of racers think that just put the plug in and off you go im sorry it just doesn't work that way .
You have to re-tune when using another plug like when you change brands or blends of fuel same thing .

I REPEAT PLEASE READ THE MANUAL JUST DONT DO WHATEVER YOUR PAST EXPERIENCE TELLS YOU .

thank you for your time .
_________________

i have ran the os motors v spec , IMO i have found the odonnell down low to have more than enough punch and acceleration up the straight i was running a 2047 pipe with a longer header on it at the national titles here in australia last weekend , it was powering along my truggy just fine i only had the throttle epa set on 75% and was running a 7mm restrictor :D

Nice info Matt.:nod::nod::nod:

just I ran mine in, in about 1 hour
whow...seems to have no pinching at the top at all
just started first second on the box each time
never seen that before...
makes me wonder if they have been run-in a bit at the factory ?
is a jp-4 pipe ok ?

I like the fact that it was not overly pinched like Vspecs. where conrod is practically shot after break in.

my SS21 still have no play on the conrod and perfect seal. and still a bit of pinch at the top. after 1/3 gal.

Remember that engines with extreme pinch are also not a perfect fit.They also wear out quicker and create more heat from excessive friction.

Have you ever had a engine like the odonnell that you can run such lean settings as what are stated .1.5 turns from close on the lsn never heard of .

The engine is precise, a perfect fit thats why its not so pinchy on the top

But i repeat if its not run in as per the manual dont expect it to last as long .

30% nitro you need to shim .2mm extra which will bring it to about .6mm from .4mm

Hong nor 2047 or jammin jp4 pipe with long header perfect combination.

take care guys .

Cobra, why do you say add a shim for 30%? have you had flameout/detonation issues in it's stock form?

As far as LNS needle being only 1.5 turns out that's has nothing to do with quality of the motor. it could be from any factor like size of the needle, size of the port.. etc. too manu variables.

Also there is no such thing as a perfect fit Piston and sleeve, no matter how perfect it come from the factory it will have it's tolerances. and that's why the sleeves are cross hatched so the rubbing action with piston wear it to a makes the perfect fit.

As for this mill being reliable. there just isn't enough data out there and combined time used to say it's better or worse than vspec or ninja or nova. Only time will tell. But for now I give it a huge thumps up.

I ran it in as per instructions..
25% nitro sidewinder fuel
jp-4 with long header

nice work , i like the fact that there isnt as much pinch in these as others it saves the conrod stretching ...

im sure odonnell has done extensive testing to this engine befor the release and after the flawless run i have had im more than happy with engine it is awsome ...

IMO i would run the OD 97 plugs i have found these to work the best overall and i was very happy with them :nod: i was running 30% nitro

will be good when the OD pipe is released i bet it will work a treat with this motor :D

Dear Dev

Yes some flames outs and pitting only because some people mix there own fuel in the garage as i know and it is never acurate and sometimes its even over 30% from what i know .

.2mm shim is better for them not to damage there motor as you know alot of guys in r/c are engineers but in reality factory workers if you get my drift not everyone knows everything and thats why we need to lead them in the right direction .

I have pulled apart the odonnell to pieces and have measure everything alot of the parts like needle are same size as most out there like os etc .

So yes i have done my homework i study very deep to come up with a conclusion its not just off the top of my head its real facts that have been tested and proven .someone else's tests might be different who knows but im just stating what i have found .

Your doing a great job dev keep it up the more info the better this way we all learn something different .

pardon any ignornance. but in reading this thread and handlin the motor in the shop. i will say its very well made at least from observation. i see a lotta comments bout waitin for a 2047 pipe to come out for it.

i'm sure you folks prolly already know, but the losi RE11 is a 2047. 65bux from gasket to stinger. just a thought, apologies if already a known quantity.

R

i thought you said you were done with rctech ?

LOsi pipe you'll get what you pay for. my RE10 looks painted not anodized. it's also been noted by some that re10 and re11 runs hotter than other pipes.

I love the 2050 pipe on this motor. until the Odonnell pipe comes out I"ll stick with the 2050 or 2060