Broke another piston...

Alligator

New member
Nov 9, 2006
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N. Idaho
Here's the rod - Sorry about quality, Iphone camera...
IMG_0024.jpg
 
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mytmousemalibu

Cut your ride, sissy!
Apr 12, 2008
2,230
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Kansas
Ah, theres the money shot!:spit:

Pretty common on the Traxxas 2.5, 2.5R and 3.3......... That nice little notched beam design is a bad stress riser and seems anyone that runs a decent race tune-up in one ends up making a 2-piece con-rod at some point or another :(
I only put a gallon of 20% through my 2.5R before i yanked it for the Collari and my old motor went into a Kyosho TR-15 buggy with a boat pipe!

Get ya a RB Concepts or a nice OS, Novarossi and you'll have your hands full! Werk's racing/Sirio have some nasty mills too, my Collari is a Werks motor. Some of them have 2 huge transfer ports on both sides of the crankcase, big enough you almost can put motor screws in:D
 

Alligator

New member
Nov 9, 2006
1,919
0
0
48
N. Idaho
Ah, theres the money shot!:spit:

Pretty common on the Traxxas 2.5, 2.5R and 3.3......... That nice little notched beam design is a bad stress riser and seems anyone that runs a decent race tune-up in one ends up making a 2-piece con-rod at some point or another :(
I only put a gallon of 20% through my 2.5R before i yanked it for the Collari and my old motor went into a Kyosho TR-15 buggy with a boat pipe!

Get ya a RB Concepts or a nice OS, Novarossi and you'll have your hands full! Werk's racing/Sirio have some nasty mills too, my Collari is a Werks motor. Some of them have 2 huge transfer ports on both sides of the crankcase, big enough you almost can put motor screws in:D

Put a OS.18 in it yesterday. :D
 

ZeroGravity58

Well-known member
Mar 23, 2008
1,401
51
48
38
Maryland
I used to run OS motors all the time and they never let me down....I used to run 40% nitro fuel without any problems. Motor would last me about 2 gallons of fuel before they were toast. I sold all my nitro cars though all i have left is my first car which is the origonal RC10 buggy with the gold chassis....
 
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mytmousemalibu

Cut your ride, sissy!
Apr 12, 2008
2,230
0
0
Kansas
Put a OS.18 in it yesterday. :D

:happy2: :thumb: Thata fix it! She'll scoot with reliability now! :D Addicting motorsports are like a plague! :spit:

Wish there were actual car/truck diesels besides conversions for us, just plane engines. I say that because instead of alum pistons and ABC sleeves and such, the diesel plane engines have steel pistons and cylinders/sleeves and are overbuilt to handle the stress!;) I have heard of may instances of old timers flying the same, untouched diesels fairly contenouslly since 1950's and such! We could wear out many a chassis on the same motor:eek:
 

Alligator

New member
Nov 9, 2006
1,919
0
0
48
N. Idaho
:happy2: :thumb: Thata fix it! She'll scoot with reliability now! :D Addicting motorsports are like a plague! :spit:

Wish there were actual car/truck diesels besides conversions for us, just plane engines. I say that because instead of alum pistons and ABC sleeves and such, the diesel plane engines have steel pistons and cylinders/sleeves and are overbuilt to handle the stress!;) I have heard of may instances of old timers flying the same, untouched diesels fairly contenouslly since 1950's and such! We could wear out many a chassis on the same motor:eek:

Thanks, got it for a steal too. I hear ya on the diesel plane motors, it would be nice to have one for the torque alone. What would be real nice is one for my Baja 5T, that thing is a pig.