Sirio Conrod
#1
Sirio Conrod
Hi,
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
#2
Re: Sirio Conrod
Originally posted by RS
Hi,
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
Hi,
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
Defenetly if conrod broken something is wrong. It can be worn out, but no broken.
#3
Tech Master
iTrader: (1)
I got into some serios for the first time the other day, (an anti trinity thing actually) what I saw was some serious machining steps at the bottom of the beam at the big end. It was cause for concern for me so I worked on that area some. Hopefully those will work out for the customers I built them for. I had heard of this before but I thought I had heard they had addressed this.
I'm curious.Precisely where did yours break??
I'm curious.Precisely where did yours break??
#4
Re: Re: Sirio Conrod
Originally posted by Top Gun 777
...................... but I can say from what I saw-cranck pin isn't hard enough and bronze they use on conrod isn't that right for this particular aplication. I can sugest them ( Sirio) to coat pin with chrome or make surface hardening with higher number.
Defenetly if conrod broken something is wrong. It can be worn out, but no broken.
...................... but I can say from what I saw-cranck pin isn't hard enough and bronze they use on conrod isn't that right for this particular aplication. I can sugest them ( Sirio) to coat pin with chrome or make surface hardening with higher number.
Defenetly if conrod broken something is wrong. It can be worn out, but no broken.
My Sirio Evo2 after a gallon of fuel has developed an unsual wear between the crank pin and the conrod's big end. I've stoped using it and ordered a new conrod but...... i made a mistake not measuring pin dia and conrod bushing before break-in, so I don't know if only changing conrod is enough.
Do you know what are those stock diameters???
I love my Sirio Evo2, it is the fastest engine I've had so far, and has the new track record here, but..... it would be very expensive to keep it if I have to change conrods or cranks that often....buaahhhh!!!!!
Afm
#5
Motorman, the conrod broke at the end that was holding onto the piston. It just cracked open. I'm not running the engine lean or anything like that. The conrod feel very weak. I wonder if there are any other conrod that would fit the sirio. I heard the Nova Carbs fit the Sirio, what about the conrod??
The sirio is a great engine in terms of peformance, but they need to sort out their reliability.
The sirio is a great engine in terms of peformance, but they need to sort out their reliability.
#6
Tech Initiate
Just great! Sounds like I just bought a boat anchor. It's not like I have a couple hundred bucks to test my shreader with.
#7
Tech Master
iTrader: (21)
Re: Sirio Conrod
Originally posted by RS
Hi,
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
Hi,
I was wondering how many of you out there had problem with your Sirio Conrod. I'm running the Sirio .12 TRP PRo and after 6 months my conrod broke. My friends have a 3 port and after just 2 month it broke. Are the Sirio conrod not as strong as others or is this normal? Also I found replacement parts for them are very hard to get. I live in Australia and I normally order stuff from RC Mart or RC Model, but was told that they've been out of stock for about 8 months now.
Your feedback would be greatly appreciated.
#8
TOLERANCES
Who knows what are the standard measurements for the
Sirio S12 crank pin and conrod large and small ends bushings???
What would be the maximum tolerance before changing conrod and/or crank???
Thanks in advance for help in this issue
AFM
Sirio S12 crank pin and conrod large and small ends bushings???
What would be the maximum tolerance before changing conrod and/or crank???
Thanks in advance for help in this issue
AFM
#9
Re: TOLERANCES
Originally posted by afm
Who knows what are the standard measurements for the
Sirio S12 crank pin and conrod large and small ends bushings???
What would be the maximum tolerance before changing conrod and/or crank???
Thanks in advance for help in this issue
AFM
Who knows what are the standard measurements for the
Sirio S12 crank pin and conrod large and small ends bushings???
What would be the maximum tolerance before changing conrod and/or crank???
Thanks in advance for help in this issue
AFM
#10
Hi guys, for your records below is the official answer I got from the factory concerning conrod life for the Sirio S12. Also I did measurement to crank pin on a new stock engine and found that it has 4.428mm.
Hope it helps everybody
AFM
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
The life of the conrod depends mainly on the fuel you use, as the lubrification and the right carburation keeps your engine running well for long time."
Regards,
ANDREA ROSSI
Lavorazioni Meccaniche srl
Via Meucci, 3 Seggiano di Pioltello Mi Italy
Tel +39 0292160235 Fax +39 0292160581
Visit our Web Site at :
WWW.STAR-MOTOR.COM
Hope it helps everybody
AFM
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
The life of the conrod depends mainly on the fuel you use, as the lubrification and the right carburation keeps your engine running well for long time."
Regards,
ANDREA ROSSI
Lavorazioni Meccaniche srl
Via Meucci, 3 Seggiano di Pioltello Mi Italy
Tel +39 0292160235 Fax +39 0292160581
Visit our Web Site at :
WWW.STAR-MOTOR.COM
#11
Tech Initiate
Originally posted by afm
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
#12
Tech Fanatic
Originally posted by afm
Hi guys, for your records below is the official answer I got from the factory concerning conrod life for the Sirio S12. Also I did measurement to crank pin on a new stock engine and found that it has 4.428mm.
Hope it helps everybody
AFM
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
The life of the conrod depends mainly on the fuel you use, as the lubrification and the right carburation keeps your engine running well for long time."
Regards,
ANDREA ROSSI
Lavorazioni Meccaniche srl
Via Meucci, 3 Seggiano di Pioltello Mi Italy
Tel +39 0292160235 Fax +39 0292160581
Visit our Web Site at :
WWW.STAR-MOTOR.COM
Hi guys, for your records below is the official answer I got from the factory concerning conrod life for the Sirio S12. Also I did measurement to crank pin on a new stock engine and found that it has 4.428mm.
Hope it helps everybody
AFM
"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
The life of the conrod depends mainly on the fuel you use, as the lubrification and the right carburation keeps your engine running well for long time."
Regards,
ANDREA ROSSI
Lavorazioni Meccaniche srl
Via Meucci, 3 Seggiano di Pioltello Mi Italy
Tel +39 0292160235 Fax +39 0292160581
Visit our Web Site at :
WWW.STAR-MOTOR.COM
Just my 2 cents
Paolo
#14
Originally posted by shiston
Are there any conrods from novarossi engines that are compatible with the first batch of sirio 12 engines?
Are there any conrods from novarossi engines that are compatible with the first batch of sirio 12 engines?
AFM
#15
Tech Rookie
Sirio rebuild
Hi I have recently rebuilt a sirio .12 after a conrod failure the bronze big end bush had totally disintergrated.
After measuring everything up I discovered the Big end journal was 0.06mm
out of round,I dont know if this was a factory problem or a result of the conrod failure.After looking around for a replacement conrod I decided to make my own as the originals dont seem able to cut it.
As Im an engineer I remachined the crankpin and made a new conrod with a steeper knifedge profile to give it more strength and also machined 1mm radius around the pin ends to reduce fatigue at that point.The new conrod is made from alloy tooling plate Light and strong.
So far its run great .
After measuring everything up I discovered the Big end journal was 0.06mm
out of round,I dont know if this was a factory problem or a result of the conrod failure.After looking around for a replacement conrod I decided to make my own as the originals dont seem able to cut it.
As Im an engineer I remachined the crankpin and made a new conrod with a steeper knifedge profile to give it more strength and also machined 1mm radius around the pin ends to reduce fatigue at that point.The new conrod is made from alloy tooling plate Light and strong.
So far its run great .