47LikesALPHA OFF ROAD ENGINES
12-05-2010, 10:19 AM
#3811
I agree. Preheat engine to 180, a few tanks on the box(at 210ish), and then some more on the street varying the rpms, and making sure that you keep heat in the engine is key. I will sometime wrap foil around the head if needed, to keep the heat in (220 is good). Let it cool, then repeat. By the 8th tank, I am already sneaking up on the tune a bit, but not full race tune. By tank 12 or so, I am almost at full race tune.
Preheating the engine until the mechanical pinch is gone, is always a good idea to reduce stress on the rod.
Preheating the engine until the mechanical pinch is gone, is always a good idea to reduce stress on the rod.
i have broken in mybe 30-40 alphas using a method like 808gx7r for people,
all of them have come back and said they never had to replace the rod or a bearing before 6-7 gallons which is about its life.
12-05-2010, 04:15 PM
#3815
12-05-2010, 04:42 PM
#3816
Still have my 1st and only alpha f850. It is now at 7 gallons and still idles forever and has killer power. No new rod, bearings, pinch nothing. All original and i have been hard on this motor. We are very impressed with Alpha. I will try the "green head" next though. Unless i get a motor deal from someone.
12-05-2010, 05:03 PM
#3817
Still have my 1st and only alpha f850. It is now at 7 gallons and still idles forever and has killer power. No new rod, bearings, pinch nothing. All original and i have been hard on this motor. We are very impressed with Alpha. I will try the "green head" next though. Unless i get a motor deal from someone.
12-06-2010, 04:28 PM
#3818
How long after are you replacing pistons?
What procedure have you been doing to alleviate the new carb slides from sticking? Have you found the anodizing to be too thick or are the slides machined too large?
TIA Guru
12-06-2010, 04:35 PM
#3819
Since we're on the subject, Jimmy, you have a forthcoming PM. 
12-06-2010, 04:52 PM
#3820
Tech Initiate
It has lots of run time left too, but needs to be put away as a backup with that much time on it. Ready for a 7pt alpha now. Too bad its too cold here to run one in.
12-06-2010, 04:56 PM
#3821
Hi, what brand is the 2072? Alpha? Also didnt mention that after 7 gallons no rust on the crank. Torco 30% I still cant believe this motor. Either I have gotten alot better with nitro or this motor suits me 100%. I think 7 gallons is great lifetime for a motor that i race with. Always optimal It has lots of run time left too, but needs to be put away as a backup with that much time on it. Ready for a 7pt alpha now. Too bad its too cold here to run one in.
It has lots of run time left too, but needs to be put away as a backup with that much time on it. Ready for a 7pt alpha now. Too bad its too cold here to run one in.
12-06-2010, 04:59 PM
#3822
Tech Initiate
12-06-2010, 09:07 PM
#3823
its not a go-tech pipe. go-tech no longer exist, its now go-engines co.
the pipe is called go-engines efra 2072.
its much better then the combo pipe. big story about those two pipes as they got mixed up during production.
6-7gallons is about the min on what we out of an alpha, some guys are getting up to 10-11, i have only ever got 9ish everytime.
you mean changing pistons and sleeve?
not worth the rebuild. just buy a new one.
i only stock z852s, can get others though, but with z852s, and with the 130+ i have sold i've never heard about any problems with the carbs.
can anyone run thier alpha at 200f? even after a 30min main?
the pipe is called go-engines efra 2072.
its much better then the combo pipe. big story about those two pipes as they got mixed up during production.
6-7gallons is about the min on what we out of an alpha, some guys are getting up to 10-11, i have only ever got 9ish everytime.
you mean changing pistons and sleeve?
not worth the rebuild. just buy a new one.
i only stock z852s, can get others though, but with z852s, and with the 130+ i have sold i've never heard about any problems with the carbs.
can anyone run thier alpha at 200f? even after a 30min main?
12-07-2010, 08:16 AM
#3824
6-7gallons is about the min on what we out of an alpha, some guys are getting up to 10-11, i have only ever got 9ish everytime.
you mean changing pistons and sleeve?
not worth the rebuild. just buy a new one.
i only stock z852s, can get others though, but with z852s, and with the 130+ i have sold i've never heard about any problems with the carbs.
can anyone run thier alpha at 200f? even after a 30min main?
Thats more like the numbers we have seen. I've broke them in cold to get them on the track within an hour and the rods still last 6+ gallons.
No, I'm talking slop in the piston wrist pin. The piston wears out in the wrist pin before the rod will go. At $80 they aren't worth rebuilding? Ok........
Yes there is a batch of new carbs out there with some issues. The old ones had undersized orings (which R/C Pro Products fixed with Alpha) now we are seeing carbs with some sticking issues, which I'm sure will be remedied very quickly.
And depending on ambient temps, nitro % being run and of course a correct tune, an Alpha will run at or under 200F.