Wow, I have not been back over here in a while. This thread really took off.
Now for an update, I have the bike running very well at idle and part throttle. The top end is where I run into problems. The highspeed circuit in the carb is just not big enough to get an ample amount of fuel into the engine as it transitions off of the low speed needle. I think the circuit could be drilled to gain some more fuel, and that is my next move. BTW head temps are in the 170 range and I think thats still a little too hot for an engine of this size. Any thoughts or suggestions would be greatly appreciated.
Wow, I have not been back over here in a while. This thread really took off.
Now for an update, I have the bike running very well at idle and part throttle. The top end is where I run into problems. The highspeed circuit in the carb is just not big enough to get an ample amount of fuel into the engine as it transitions off of the low speed needle. I think the circuit could be drilled to gain some more fuel, and that is my next move. BTW head temps are in the 170 range and I think thats still a little too hot for an engine of this size. Any thoughts or suggestions would be greatly appreciated.
send the carb to PBD or ADA to be converted to alcohol.
send the carb to PBD or ADA to be converted to alcohol.
I was thinking about "converting" it myself. I would assume the fuel circuits are just opened up a bit. Is there something else that they are doing that is a "have to" kinda deal?
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
Hi All,
I know this is a really old thread but i have been doing some research and want some adivce. I have a 50cc pocket bike with a 18mm carb i think. I have created an injection system that injects fuel into the crankcase directly. I plan to run nitro with this. It injects with a small electric fuel pump at about 2psi. It has a small metering valve to conrol the flow. The idea is that the bike will run on the carb/petrol until it is time to go full noise on the nitro, at which time you turn the pump on and off you go.
I have had alot of experence with nitro in model planes. I have got a 6 cc pylon plane running on 80% nitro, 20% oil making around 3.3 hp.
I guess i was wondering if anyone has done this before?
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
After reading thrunthe whole thread i see one blatantly obvious mistake here...LOL all this talk of RC gas, but no one realized that its designed to be run high compression and a glow plug, not spark ignited..... The volume of fuel in the mix will "blow out" the spark of a standard Pb ignition, you would need to upgrade the coil, stator mags, etc or convert to like an automotive hei 50000 v coil type of setup....or, convert to a glow plug......LOL but then you have no killswitch....
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
As far as im aware, a Top Fuel dragster, (supercharged) and a injected nitro A fuel car run compression ratios of around 6:1 to 7:1. A methanol blown Funny car will run about 11:1 and a gas motor around 15:1. So i dont think this is a prolem. Also, the bike will be running on gas, and then have nitro injected into it. So it will be warm and the plug will be hot so this will aid in the burning of the nitro.
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
Quote:
Originally Posted by TAFC1163
As far as im aware, a Top Fuel dragster, (supercharged) and a injected nitro A fuel car run compression ratios of around 6:1 to 7:1. A methanol blown Funny car will run about 11:1 and a gas motor around 15:1. So i dont think this is a prolem. Also, the bike will be running on gas, and then have nitro injected into it. So it will be warm and the plug will be hot so this will aid in the burning of the nitro.
sounds good in theory, but in actual practice i dont see it working or doing anything...
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
Well I have it running, works good. Will run it tonight and see what happens. For those concerned with saftey, I have a sfi 20 firesuit, and a Kevlar blanket around the engine to catch any flying debris. Should be fun will post a video later
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
I know a little about this stuff (Nitro) and in the interest of safety I must stress to everyone PLEASE do not compress this stuff unless it is in a combustion chamber. You get a drop or two in the bottom of a bolt hole and compress it, this mad little genie will break **** to get out. I have seen the aftermath and have visited people in the hospital because they had extra holes in them. Please be careful all
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
Quote:
Originally Posted by TAFC1163
Well I have it running, works good. Will run it tonight and see what happens. For those concerned with saftey, I have a sfi 20 firesuit, and a Kevlar blanket around the engine to catch any flying debris. Should be fun will post a video later
The guy in the nitrobike vid on utube had a kevlar breast plate and he still died..........
Youd get better powergains running propylene glycol in one tank and blend it with an alky/methanol mix to control the heat...youre gonna have to double the jetting and maybe have to go with a 19 or 22mm carb on a cag engine but the power is off the hook when used in an engine between 15:1 and 17:1 compression
The main problem i had was it running a lean up top of the rev range. So a bigger fuel pump is in order. It mostly just melts the end of the spark plug off. Not too big of a deal yet, the piston, rings and head all seem to be going fine.
The main problem i had was it running a lean up top of the rev range. So a bigger fuel pump is in order. It mostly just melts the end of the spark plug off. Not too big of a deal yet, the piston, rings and head all seem to be going fine.
if you are melting electrodes, i can pretty well say your piston, rings and cyl are not the greatest shape anymore....the molten metal has to go somewhere...
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
You are correct, the rings do show some signs on metal, however some 1200 wet and dry and its all good again . I have a bigger fuel pump so will have to test it out and see. aswell as a bigger ignition and and fitted a spark plug that they use in a top fuel dragster. So fingers crossed it helps
Re: Anybody ever try RC car fuel? (alcohol with 20% nitro mix)
In your first vid your brakes seemed to have been dragging alot or your chain is too tight............
Sounds like youre running it through a bone stock engine....gotta get that compression above 13 to see any real-time hp results and make that nitro pop..........
will post a video later
