- Messages
- 13,105
You have something off if your busting flywheels like this. don't know what to tell you off hand but that's not normal
The $350 reedcase engine.
- Thread starter Troopermaniac
- Start date
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- Messages
- 19,475
Unbalanced or bent crank maybe?
- Messages
- 13,105
Yeah idk, but something is up. 2 for 2 just don't add up.
- Messages
- 17,175
- Location
- Crafers South Australia
X2??
?? nope go back to begin do not collect 200?
?? nope go back to begin do not collect 200?
- Messages
- 954
- Location
- New Jersey
- Thread starter
- #145
Found out that the crank is keyed in the wrong spot. Causing rub issues with the flywheel...
- Messages
- 19,475
for some reason im really unsurprised, idk what it is though 
- Messages
- 13,105
Please expand on that thought. What's it rubbing on that would break it in half and not make a terrible noise?
- Messages
- 954
- Location
- New Jersey
- Thread starter
- #148
Its subtle its only an issue when it heats up. I got a new flywheel on the way to see whether or not its a cheap fly wheel issue or a crank issue. Compared this crank to my stock one I noticed the key is farther in.
Well no running video today. Heres a short vid of the compression snap. Its so hard it feels like a nitro engine. This gonna be a torquey sob https://photos.app.goo.gl/92c6eisfsy9KoWbw9
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- Messages
- 13,105
Set up a dial indicator and check your crank run out. The key really doesn't matter, the taper is what sets depth and keeps the flywheel on, the key is just for timing. Now if the taper is wrong on either the crank or flywheel then that will give you stand off issues.
- Messages
- 954
- Location
- New Jersey
- Thread starter
- #150
https://photos.app.goo.gl/iYhuEYbAVppZBAR49
Need a bit of help with this one. My engine can't get enough air/fuel mixture to maximize its power at idle. Whats bigger then a 1107?
Need a bit of help with this one. My engine can't get enough air/fuel mixture to maximize its power at idle. Whats bigger then a 1107?
- Messages
- 19,475
wj71 is gunna be way too big imo. i think this might work https://www.davesmotors.com/walbro-hda-48-carburetor
the way i see it trooper, can you modify the idle screw or the plate on the end of the throttle shaft so you can get the butterfly open more at idle?
what i mean is so you have more adjustment for idle, the walbro carbs aint the best for the amount of idle adjustment ya can get anyways,
would save you money in the long run and still use the 1107,
just my thoughts mate
- Messages
- 19,475
i don't understand how you are maxing out the 1107 though. on the 40gt and 46, i think even the 50-55 rcmaxes, they use 1107 without issues
- Messages
- 954
- Location
- New Jersey
- Thread starter
- #154
Idk either however you can hear that motorcycle type of pop and whine once I give her more air and fuel. It definitely needs a modification somehow or a carb change.
*edit* actually I could probably 3d print some idle shims!!
- Messages
- 19,475
The carb doctor @Seandonato73 might be able to give you sum tips or something regarding mods or whatever to the carb
ijust looked and the 40gt comes with a fully modded roostertail 990 z zee zed,
and the 55 is either the roostertail or the wj71
,although looking at description etc you can buy a carbless 45gt and use carb of choice,
- Messages
- 19,475
i stand correctedijust looked and the 40gt comes with a fully modded roostertail 990 z zee zed,
and the 55 is either the roostertail or the wj71
although looking at description etc you can buy a carbless 45gt and use carb of choice,
lmao z, i only know cos i looked on rcmax site matei stand corrected
,
- Messages
- 954
- Location
- New Jersey
- Thread starter
- #159
Yeah thanks guys. I'll probably be able to fix this tomorrow. I'll be able to get a proper running video in. The video doesn't give it justice. It sounds straight up like a motorcycle engine but not as good as my OBR. Belive me I tried.
- Messages
- 13,105
The 1107 is rated up to 50cc engines. There are few things to be done to get more fuel to them, but that also makes them more sensitive to idle settings. The rooster tail is bored out, and has a few other little things done to it in the metering circuit. Idk what specifically, but fro. the cryptic conversation I had with them about it, that's what I got out of them. Any of the larger wt series would work fine. The wj series had smaller bore carbs, but are a pain to find. The wj71 is common in large scale flight, I think that's half the reason we see it so much in 1/5 rc. I'd have to check numbers to be sure but I think a wt199 would work nicely. May be a bit over kill, use it on 50-60cc. 50cc only of ported in saw land.