I'll check that....any other suggestions anyone?

Hi.

Maybe its the combustion chamber. I had an issue with a Plus4 with the same "lean" idle sound. Monty suggested me to change the combustion chamber, and that was the fault.

What plug, pipe, header, fule etc are you running?

Do you know what was wrong/ what happened to your combustion Chamber?


Dave

I couldn't see any error on the chamber, but you can read this:

http://www.rctech.net/forum/10483754-post2357.html

anyone have any input on the new .25 truggy roma motor/ building a truggy this week and looking for power, starters going to be the bonito tuned/pre-run..but that roma lookin serious? thanks sorry if answered/asked, just looking for most recent update if possible..

Well I got the motor in the truck but it won't run well. Idle is really inconsisitant, sometimes its high, sometimes its low without moving the idle screw, it occasionally surges and dies. If I can get it to stay running any length of time and wind it up it will die on the top end.

There could be alot of things goings on there,

Where should I start?

sounds like inconsistent fuel pressure to me

front bearing leaking?
pressure line pinhole?
gummed up carburetor?

first things i would check

does a different engine do the same thing in that car?

I just got my P5XLT in the mail and I am going to try to get at the least a gallon through it today after I find some fuel ( everyone is out of stock ).

One of the things I've noticed is that there is NO head shims in box ! I haven't taken the head off yet but am assuming there already installed.

Is there any recommendations for running Byron's 30% / OD 97t / platinum 086 pipe /,,,,,,,,,,,,, head shims ?

I read somewhere along these 100pgs. that it was a good idea to flush the engine out with fuel ? or after run oil ? before first start up !

Any advice on this adventure would be appreciated.

How do i prevent an enigne flameout after a fuel stop? I had this happen to me a couple of times during heats. Using a 21-4T.

Novarossi, changed the Btta front bearing to a 17004 (i think) instead of the 17011. Monty said all the recent Btta's came with this new bearing. It is the same bearing that the P5 now comes with. Its not a bad bearing and was told it will last a while, just not as long as the 17011 that the motor used to come with. I have a 17011 that is going to go in when the time comes.

Use Novarossi plugs. The OD's aren't as good.

Try not to pit on a completely empty tank is the best thing to try.

Too rich LSN
Too rich HSN
Too cold plug
Too low idlespeed
Overfilled tank
Too cold plug
Too cold plug

What plug, fuel and pipe are you running?