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New Picco P2 .21 installed, now where's the power?

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LATEST P2 INSTALL UPDATE

I finally received and installed the RD Logics pipe. Man, it's a really nice lookin' pipe, but it's very LOUD. I don't just mean regular LOUD, I mean REALLY LOUD. It seems to amplify the sound somehow. It's so loud that I no longer feel comfortable running it around my neighborhood. Anyway, on to the running report...............

ImBroken; man that's a good call, hehe. I did have it running briefly and it seemed to be stronger now (with the RD Logics pipe). I immediately noticed it revving up and figured something was slipping. Sure enough, the slipper was a tad loose and was spinning. I cleaned the slipper thoroughly, and I also cleaned the clutch assembly.

I will post another report after I run it some more and try to tune for power, but I may have to get the RRP slipper kit. I am already using the RRP metal spur gear. Will the RRP slipper kit work with that spur gear?

Anyway, that's the update on my P2 install. I might sell off the RD Logics pipe, as I am certain the LOUD NOISE is bothering the neighbors. Would anyone have a recommendation for a quieter (but still tuned) pipe?

Did I mention the RD Logics pipe is LOUDDDDDDDDDDDDD!!!!!!!!
;-)
 
P2 AT FULL POWER!

Finally, this thing is rocking. Cleaning and tightening up the slipper, as well as putting on the RD Logics pipe, made this thing come to life. It will now wheelstand with ease, and do about three or four backwards rolls if you hit the trigger too hard, hehe. I had to richen the HSN much more than tmaxx4 (his was 4+1/4). Mine must be around 6 turns out by now. It might be just a tad rich, but I'd rather keep it that way. It is still making mucho power.

Regarding the noise, I had a silicone exhaust deflector, which I put on, plus I added about 4 inches of radiator overflow tubing behind that. I drilled a bunch of holes in the overflow tubing to act as baffles. I am no audio scientist, but the addition of the overflow tube to the deflector really helped tone down the noise. I used a couple of small zip ties to hold the tubing against the frame rail, so it's tucked up there pretty nicely.

I installed a 22t (it had a 20t) pinion, but this thing will obviously withstand a lot more gear. Currently I have 22t/72t ratio and it hits top speed very quickly. I am not sure if this P2 motor revs higher than the 2.5 (I don't think it does), but it definitely hits the RPM limit much faster than the 2.5. This thing would easily handle a 64t spur, but that would be mostly for top speed then. For general bashing, it seems hard to beat what I currently have.

Bottom line; I am finally happy with the P2. It took some tweaking, but it screams. Thank you all for tips and help.
 
I kno this thread has been resolved but I jut wanted to state something about the pipe for the newbs out there. If u run that small of a pipe then your back pressure is going to force to much fuel into the engine. Causing it to run way to rich no matter wat the settings. That's wat I think was robbing u of your power.

BTW kind of a wierd thing my mind just thought of so don't laugh at it please. But usually when people are rich, they have more power!:eyes: I can relate everything to engines!:ninja:
 
Is it possible to have a to big of pipe then?? like a .25 on a .15 or something? Just curious, I'm a :n00bie: . (been into planes mostly, but now trucks and cars too!) Thanks~Andy
 
Absolutely the engine needs backpressure to function and if you have a huge pipe then the engine will work poorly. I am not positive why you need backpressure but I know you need it. Mabey someone could explain why an engine needs backpressure?
 
A 2-stroke engines' intake and exhaust ports are open at about the same time. So, that means that some of the incoming fuel mixture could just as easily exit through the exhaust as it could go into the combustion chamber. The tuned pipe produces pressure waves that culminate in just enough backpressure to force some of this escaping mixture back into the engine, producing way more power. Of course, it's a delicate balance to create just the right pressure and that's why different size pipes have different results.

There is a lengthy and complicated formula for calculating shape and volume of a tuned pipe. I've seen the formula but I don't pretend to understand the math. It is easy to understand the premise though.
 
The gas tank and fuel lines also play big roles. When the piston goes down it forces the exploded fuel and air into the pipe which has a chamber that pressurizes the gas tank through the tubing and forces fuel through the only other opening in the gas tank which goes to the engine. If that prssure is to large than it will force to much fuel into the engine as mentioned above. If it's to litte (to big of pipe) then the engine will be starved of fuel. That is why u can prim the engine by plugging the stinger, your making all of the air go to the gas tank.
 
hey, guys I got a question, is there another pipe you would suggest buying for this motor. I can't find a canadian dealer that carries that pipe. I don't wanna order from the us because of add cost at the boader and what ever else.
 
the sirio big bore pipe would probably work pretty well with that picco .21 motor.
 
Originally posted by Obsessednitrolover
hey, guys I got a question, is there another pipe you would suggest buying for this motor. I can't find a canadian dealer that carries that pipe. I don't wanna order from the us because of add cost at the boader and what ever else.
Click to expand...


The sirio big bore pipe works wonders.:thumbup:
 

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