Trinity EXTECH .21
06-03-2009 | 02:48 AM
#1667
I think your motor is not broke in yet your probably getting close.It is typical for this motor to run erratic until it is broke in. The factory settings pertain to using Trinity Platinum 30% fuel so running Byrons they will be a little different but not a bad place to start. leave your high speed fat for now and work on the bottom to were you can idle and hit the throttle and it will still blow smoke but takes off and then flattens out from being too rich on top. Don't try to set your setting on the box you need to put the motor under a load to tune and then you can dial in at your track. After you run around get a little temp in it you should start with your bottom end first then work on the top. When the motor brakes in totally it will richen up and you will need to re tune and then it will hold a tune. Remember this motor .21 should not need to ever get above 200 deg f my motors run around 180-190 all the time don't try to tune by temp tune by sound you should always see a little smoke all the times. Motors that flame out when you hit the throttle normally are too lean not enough fuel for the motor it will flame out and too rich will fuel wash the plug and makes crackling noise and then stalls. Hope this will be some help.
[QUOTE=smracer31;5888072]I know it was mentioned but have you checked the carb boot yet? pull the motor out and take the boot off and pull it over your finger and inspect. if you have a small pinhole tear/hole the motor does exactly what your describing. Without taking the boot off its hard to check for leaks, and when you put it back on seal it up with some engine sealant on both ends of the boot and zip tie the big end.
Yes I have pulled the engine out and inspected the carb boot but I have not pulled the boot off the carb. I will have to try this. Is it easy to get off and then back on. I am guessing to remove it I will have to pull the ball linkage off to slip the boot off or is there another way?
06-03-2009 | 07:41 AM
#1668
Tim I hear you and thanks for tyring to help. The sound that I am hearing can be heard from 50 ft away. The sound I am hearing now matter where the needles are rich or lean is the same. Its not high pitch or screacthing but more like its going to break. its a very quick eractic/vibrating almost like when your driving a stick shift real car and you go from 5th gear down to 2nd at 50mph but stuttering fat off throttle. Shit this is getting hard to explain. The only other way I can articulate it like when you hit your anti lock brakes and you hear the computer take over pumpming the breaks really fast but with bog and fat sound that pitches high then low extremley fast and very eratic.
Also does it seem to vibrate like crazy?
Hope this helps!
06-03-2009 | 10:01 AM
#1669
That sound is unfortunately familiar...If it is what I think it is you pop open the back plate and look the crank pin and rod..the crank pin may be worn out. As I have asked before does it seem to have a lot of slop at TDC. By looking at the rod / pin you may see a gap showing wear. I hope this is not the case but from your description.....
Also does it seem to vibrate like crazy?
Hope this helps!
Also does it seem to vibrate like crazy?
Hope this helps!
06-03-2009 | 11:26 AM
#1671
I have the same problem with that pipe the baffle broke im using a jp-2 pipe and it works good i just don't know what kind of run time im getting
06-03-2009 | 02:19 PM
#1672
Not using a big boy.
I can't recall the modle right now but its the pipe that comes with the engine and the clutch in one box.
The nitro box is what I purchased. I am not sure if this pipe has a bafle or not.
I can't recall the modle right now but its the pipe that comes with the engine and the clutch in one box.
The nitro box is what I purchased. I am not sure if this pipe has a bafle or not.
06-03-2009 | 06:18 PM
#1674
They do not all have baffles..The JP series are chamber pipes, there are no baffles in them..I am not sure about all the others, but I know for sure not all pipes have baffles, some use a multiple chamber system..shine a flashlight into the end of the pipe, if you can see the mounting tab, there is no baffle (JP3)
06-03-2009 | 06:47 PM
#1676
No harm, no foul! You want to know how I found out..I bought a JP3 and I looked inside, and saw no baffle, so I called Ofna and said what the Hell?? My pipe has no baffle! send me another one! That was when I got educated that not all pipes have baffles
06-03-2009 | 08:45 PM
#1677
Tech Adept
Joined: Sep 2007
Posts: 115
[QUOTE=PinoyCali;5884602]
I'm running a Novarossi p5 head on my 24. My stock head split in 2 pieces also.
You can PM him here, or go to the Epic website and see if you can contact him there. Don't know if their e-mail addys have changed with the move and merger.
Just send e-mail and pm. Hope he will answer back.
I will try OS or NR cooling head.
If extech is sirio base can I use the regular sirio green cooling head?
Just send e-mail and pm. Hope he will answer back.
I will try OS or NR cooling head.
If extech is sirio base can I use the regular sirio green cooling head?
06-03-2009 | 09:16 PM
#1678
Tech Adept
Joined: Sep 2007
Posts: 115
what plug are you running in this motor. you may have mentioned it already.
