traxxas 3.3 conrod split in half
10-12-2009, 10:41 PM
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traxxas 3.3 conrod split in half
my conrod split in half my revo was running great and it just stop and i pend to find my rod slipt in half
i woulr like to know if the 2.5 rod is the same as the 3.3 because i got a old 2.5 and it looks the same and have any body hard this hapend to there rod hirs a pic.[img][/img]
i woulr like to know if the 2.5 rod is the same as the 3.3 because i got a old 2.5 and it looks the same and have any body hard this hapend to there rod hirs a pic.[img][/img]
10-12-2009, 11:06 PM
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RE: traxxas 3.3 conrod split in half
the rod for both is the same. These engines tend to split rods when they are run lean. I had a 3.3 that would run great and overheat... my solution to this was tune to absolute max performance then richen 1/3 turn for smoke... temps stayed under 280[8D]
10-13-2009, 04:35 PM
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RE: traxxas 3.3 conrod split in half
I have had this happen before, but only with the 3.3 engines. I took a new conrod to a machine shop and had one made that was much better quality, and much stronger and costs less than the TRX replacement.
10-13-2009, 07:02 PM
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RE: traxxas 3.3 conrod split in half
^ Howd you manage that? I mean, you'd be taking a new Traxxas rod to the machine shop, with them removing material from it if they were machining it, making it weaker. Curious [8D]
10-13-2009, 07:26 PM
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RE: traxxas 3.3 conrod split in half
He took the TRX rod to the shop and had one made like it...only beefier.
Its a common issue with the 3.3 to split the conrod. Some last many many gallons others split during break-in. Too lean or too rich of a tune can lead to rod failure.
Its a common issue with the 3.3 to split the conrod. Some last many many gallons others split during break-in. Too lean or too rich of a tune can lead to rod failure.
10-13-2009, 08:09 PM
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RE: traxxas 3.3 conrod split in half
ORIGINAL: rcnitrohead
^ Howd you manage that? I mean, you'd be taking a new Traxxas rod to the machine shop, with them removing material from it if they were machining it, making it weaker. Curious [8D]
^ Howd you manage that? I mean, you'd be taking a new Traxxas rod to the machine shop, with them removing material from it if they were machining it, making it weaker. Curious [8D]
ORIGINAL: Snook Man
He took the TRX rod to the shop and had one made like it...only beefier.
Its a common issue with the 3.3 to split the conrod. Some last many many gallons others split during break-in. Too lean or too rich of a tune can lead to rod failure.
He took the TRX rod to the shop and had one made like it...only beefier.
Its a common issue with the 3.3 to split the conrod. Some last many many gallons others split during break-in. Too lean or too rich of a tune can lead to rod failure.
10-16-2009, 03:34 PM
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RE: traxxas 3.3 conrod split in half
this is what i was going to say but forgot his website , he makes very strong conrods for the 3.3 . LOL never ever seen a conrod split down the middle before thats weird
ORIGINAL: jbooker82
Davis Diesel makes a hd rod for the 3.3.
Davis Diesel makes a hd rod for the 3.3.
10-16-2009, 11:43 PM
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RE: traxxas 3.3 conrod split in half
but i need a piston also i but it back and no compresion on it mabe we it split the rod it push the piston up to high
10-18-2009, 07:21 PM
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RE: traxxas 3.3 conrod split in half
ORIGINAL: rcnitrohead
Ah thats what I was thinking, whoops I missed that in your post
. How much did it run you, I'm surprised it was cheaper than stock!
Ah thats what I was thinking, whoops I missed that in your post
. How much did it run you, I'm surprised it was cheaper than stock!
10-18-2009, 11:01 PM
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RE: traxxas 3.3 conrod split in half
^^ Haha, it always does 
. Can't wait to make R/C related parts on a drill press already.. Been working with lathes since college started and its pretty awesome, also helps that I'm 2X faster than the rest of my class
. Can't wait to make R/C related parts on a drill press already.. Been working with lathes since college started and its pretty awesome, also helps that I'm 2X faster than the rest of my class
10-20-2009, 01:51 PM
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RE: traxxas 3.3 conrod split in half
i guess i don't need a piston i did not have comprecion on it but it was because i put the coolong head wrong and it was not to tight but
tuck it a part and fix it and i have plenty of cumprecion it fire right up and befor it would just spin but know i'm good i did not thing not having the heard linend up right would make the motor have no comprecion
tuck it a part and fix it and i have plenty of cumprecion it fire right up and befor it would just spin but know i'm good i did not thing not having the heard linend up right would make the motor have no comprecion
10-27-2009, 10:15 AM
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RE: traxxas 3.3 conrod split in half
Yes their both the same just replace it and get another one it wont happen i garranty it.
Ive been in the rc era for 15 straight years this happened to me only once before i replaced it.
Ive been in the rc era for 15 straight years this happened to me only once before i replaced it.
10-28-2009, 02:00 PM
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RE: traxxas 3.3 conrod split in half
This happened to me this past weekend...
Got lucky, though. Absolutely nothing else was broken...piston is good to go, crank and crank case OK, not even a scratch on the sleeve...guess I got a little lucky.
Got lucky, though. Absolutely nothing else was broken...piston is good to go, crank and crank case OK, not even a scratch on the sleeve...guess I got a little lucky.
10-30-2009, 01:56 AM
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RE: traxxas 3.3 conrod split in half
jesus that is bad lol... anybody heard of the 2.5r doing this? i have that motor and have heard it's built similarly to the 3.3 with the exception of being smaller. i hope this never happens to me lol
10-30-2009, 12:39 PM
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RE: traxxas 3.3 conrod split in half
My buddy had a 2.5 on a Rustler that did the same thing as the above photo, but his punched a hole through the crankcase.
His driving "style" is horrific, W.O.T. for extended periods of time, and running as lean as possible for max power.
That seems to be the formula for Traxxas rod destruction.
His driving "style" is horrific, W.O.T. for extended periods of time, and running as lean as possible for max power.
That seems to be the formula for Traxxas rod destruction.
11-03-2009, 10:53 PM
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RE: traxxas 3.3 conrod split in half
ive had 3 connecting rods break lately 
one of them punched a hole in the crank case and the one of them ripped the wrist pin almost of the piston and the other one blowed the side of the piston. they gotta solve this problem. all of these was in different motors
one of them punched a hole in the crank case and the one of them ripped the wrist pin almost of the piston and the other one blowed the side of the piston. they gotta solve this problem. all of these was in different motors