tom111

Hi,

I would like to know how often do you replace your piston ring? I mean I won’t open my engine head just to take a look at the ring condition, is there some kind of index like “every 80 tanks or so…”


Thanks,

rckiwi

When it starts to get hard to start is a good indication! I usually replace every 10 tanks on my modified motors and 25+ tanks on std motors. For the cost of a new ring and gasket is well worth replacing before needed really!

SAVAGEJIM

Wow, ten tanks? I admit, I have yet to run my engines to the point of where they need new rings (not yet at least), but ten tanks does seem like to short of a duration.

rckiwi

These are modified race motors so I prefer to have them at the peak performance all the time! some times I will replace only after a few tanks

da mad maori

i replace them when the old one comes flying out the exhaust in chunks



kiddin
ive done 25+ tanks on my g27rc zen and its starting to NOT pull wheelies so to me that means she's getting low on comp

guyeh

We change ours at the begining of each race season...

racer/flyer

My Feedback: (1)

I'm no expert, but I doubt there really is a standard duration. I'm sure it all depends on how hard you run the engine and with what mixture settings are used. You always want a brown paper bag color on the plug at FULL THROTTLE. I would just do what da mad maori said, waiting till you see a small drop in performance, then replace.

slawhammer

As a general rule of thumb..Replace the piston ring after 25 hours of run time...or both cylinder and ring ..if the cylinder walls look scratched or nicked..
You have to chose what is best for your application of use... and how you use your RC Unit.....If you race every week end that's a different story all together
cuz you always want your engine the best running condition.....Just my thoughts here.....AKASlawhammer

tom111

What is the piston ring size of the stock Smartech Titan engine? (it is a 28cc engine)

Thanks for all the advises

da mad maori

it should be written on the side of the cyl....
eg.. 32-28.... is a 32mm bore / 28mm stroke so the piston ring will be for a 32mm bore

tom111

I haven’t opened my engine yet, I would like to order that ring without opening the engine first, is there a way I can know that? Any Titan owners that familiar with their engine,I know that the stock engine is CY28cc, it is probably 34mm-36mm, but which one???
Thanks.

da mad maori

lol the number is on the outside of the cylinder... you dont have to open it.... just look at it

rckiwi

Titians run a Smartech made engine no CY some were ordered from the factory with Zenoah motors but if it is a 3 bolt barrel it is Smartech 28cc engine, sorry I don't know the size of the bore on these.

rckiwi

Haha was just cleaning out some old boxes and just found the technical data for Smartech Engines 23cc 28mm stroke x 32mm bore, 28cc 28mm stroke x 36mm bore!

tom111

Thanks! so 32mm & 36mm it is (for the 23cc & 28cc engines), any idea what’s their thickness? I noticed that for these measurements they sell both 0.8mm thick & 1mm thick?