here's a tough 1 ,mixing different engine parts

[mattvictor]

I have a pico evo 2,which is no longer in production . I just noticed my conrod getting loose on the crankshaft at top dead center . I just happen to have a brand new novarossi conrod . would anyone know for sure if I could use that ?maybe I could even install the novarossi con rod piston and sleeve ,all are brand new and out of a .21 plus 5 from the same era . is that a more definitive possibility ?

 

[2revo1maxx]

I'd say about a 1% chance of that conrod working out. Just because something is out of production doesn't mean it can't be found.

 

[mattvictor]

I figure all that out already by checking every conrod I had ,but check this out ...I spoke to the tech at ofna, and he found an old conrod for that motor , and he wanted me to pay 70 bucks . I literally stop the motor as soon as I heard something wrong ,so the problem had just started . I think he thought it had been going on longer ,and he told me if I put in a new conrod that my motor wouldn't have much compression due to how high the piston went in the sleeve. I don't think he's right ,based on the fact that the problem had just happened ,I mean it may have run 5 or 6 minutes like that . what do you think ?

 

[2revo1maxx]

I would compare part #'s to other Ofna picco conrods, they probably use it in another engine that's currently being produced.

 

[w bill]

If your gona use a different con rod center to center on the pins need to be exact bushing and pin diameters have to match up.Doesn't seem like much but a few thousants on an inch can cause damage or performance problems.So unless you have calipers and micrometers dial indicators and know how to use them mix and match is not a good idea.

 

[mattvictor]

guys think about me picking up the old conrod for 70 bucks ? I just don't feel like buying a new motor right now ,since we only have a 5 month season .I figure I'll get into a new motor next season ,but at least that tech at Ofna said that he has the exact conrad from that engine in a back stock somewhere. and do you think 70 bucks is a fair price ? additionally do you think I'll have a problem putting a new conrod in without putting in a new piston and sleeve ? I really appreciate you guys letting me pick your head ,thank you very much .

 

[Extreme RC Mods]

Tell him you'll give him $30 and take it off his hands as it's old stock from a discontinued engine, I think he's sticking it to you at $70. If the rod is worn out, chances are the bearings should be replaced at the same time, that will add a few more dollars as well.

 

[mattvictor]

Oh no, Dj at Ofna won't negotiate. and I don't wanna spend money on the bearings ,the motor is already a few years old ,that's why I'm not doing the piston and sleeve either .

 

[Extreme RC Mods]

To be honest, your taking a big risk by just replacing the rod, if the bearing happens to let go chances are it will take everything with it. What's the part # for the rod, I'll do a bit of research if you like. I'm only trying to help, I fully understand your position but $70 for a rod is too high imo. Let me know, 90% of the engines I work with are picco's.

 

[mattvictor]

I don't know how to find a part number ,any suggestions would help .

 

[Extreme RC Mods]

Which exact engine is it? have you got some pictures or other info on it?

 

[mattvictor]

the engine is a picco evo 2 from about 3 and a half years ago. it is the basis for the red head jpx .21 or the "jammin" motor. it is a standard button, and it had a blue cooling head with flames and stars on it . I can take pictures with this phone ,and I know how to send them along with a text message .do you have a phone number that I could call and send pictures via text message . I'll send pictures of all the internals and the conrod . thanks a lot for the help . do you sell motors as well ? I have been looking at the team losi nitro tech as an other new motor .