Super Tiger 3250 on gas
#27
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
NO
Remember when you convert from glow to gas you reduce the amount of fuel flowing through the engine by about 50%.
So even if you keep the same ratio as glow fuel the bottom end is getting only 1/2 the oil.
Anything smaller than a 90 use 15% oil
Remember when you convert from glow to gas you reduce the amount of fuel flowing through the engine by about 50%.
So even if you keep the same ratio as glow fuel the bottom end is getting only 1/2 the oil.
Anything smaller than a 90 use 15% oil
#30
Senior Member
My Feedback: (264)
Join Date: Apr 2003
Location: Great Mills,
MD
Posts: 2,223
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
I bought a carb adapter and timing ring from Ken L. Ken also machined my 3250 head for a 10mm cm-6 plug. I am going to run the engine with the bushed rod and un-modified crankshaft.
Can I expect to have sticking piston ring problems by running 12oz oil to a gallon of fuel in this engine?
I am using a RCexcell ignition, which direction shall I install the magnet in the prop hub? Does it matter?
Mike
Can I expect to have sticking piston ring problems by running 12oz oil to a gallon of fuel in this engine?
I am using a RCexcell ignition, which direction shall I install the magnet in the prop hub? Does it matter?
Mike
#32
Senior Member
My Feedback: (264)
Join Date: Apr 2003
Location: Great Mills,
MD
Posts: 2,223
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
ORIGINAL: Ralphbf
Actually it's the bearings that need the extra oil not the piston.
Actually it's the bearings that need the extra oil not the piston.
#33
Thread Starter
My Feedback: (107)
RE: Super Tiger 3250 on gas
the BUSHING reqires mo oil also non as bearings if you change to needle bearings you can run 40: 1 . You may eventually carbon up the ring groove from to much oil but I don't think you will need to worrie about the ring sticking until then
#34
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
ORIGINAL: rcdude7
I am worried that the excess oil will cause ring sticking. I would run the engine at 40 to 1, but then the rod big end will fail. Bearings do not need the excess oil either.
ORIGINAL: Ralphbf
Actually it's the bearings that need the extra oil not the piston.
Actually it's the bearings that need the extra oil not the piston.
Even at 10:1 oil mix thats 1/2 the oil it gets running on glow.
We used to go about 3 years before decarboning one and we got 7 years out of a rod. This was on our demo engine and it got flew a LOT
#35
Senior Member
My Feedback: (264)
Join Date: Apr 2003
Location: Great Mills,
MD
Posts: 2,223
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
Thanks for clearing that up, I was concerned that the engine would suffer from excessive carbon with a 10 to 1 mixing ratio.
Can you answer me this please? I am using a RCexcell ignition, which direction shall I install the magnet in the prop hub? Does it matter?
Thanks, Mike
#36
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
ORIGINAL: rcdude7
Thanks for clearing that up, I was concerned that the engine would suffer from excessive carbon with a 10 to 1 mixing ratio.
Can you answer me this please? I am using a RCexcell ignition, which direction shall I install the magnet in the prop hub? Does it matter?
Thanks, Mike
Thanks for clearing that up, I was concerned that the engine would suffer from excessive carbon with a 10 to 1 mixing ratio.
Can you answer me this please? I am using a RCexcell ignition, which direction shall I install the magnet in the prop hub? Does it matter?
Thanks, Mike
Normal is N Pole magnet to # side sensor
#38
Junior Member
Join Date: Feb 2007
Location: Pueblo West,
CO
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
Mike,
You can buy a rare earth magnet at Radio Shack and they work great. Just hook up your ignition and pass the magnet under the pick-up, it will only fire with one side of the magnet. Make sure your ignition is hooked to the plug and just ground the plug to the head. i have a few that you can actually hear firing with the plug installed. Most ignitions have a warning telling you to "NOT" fire the ignition without a plug attached. Hope that helps
You can buy a rare earth magnet at Radio Shack and they work great. Just hook up your ignition and pass the magnet under the pick-up, it will only fire with one side of the magnet. Make sure your ignition is hooked to the plug and just ground the plug to the head. i have a few that you can actually hear firing with the plug installed. Most ignitions have a warning telling you to "NOT" fire the ignition without a plug attached. Hope that helps
#40
My Feedback: (9)
Join Date: Jan 2002
Location: Copperas Cove, Tx.
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
TKG,
In another thread you wrote that when converting the head for 14mm plugs, you need to use two gaskets. Are you taking about the compression ring that comes on the plugs? Or the copper cylinder/head gasket?
Also, I got my 14mm spark plug cap kit and my Ignition module today. Is there a "how-to" thread on installing the cap kit?
I looked around a bit but could find anything. Thought maybe you guys would know as the instructions that came with my kit are very sparse and the pictures are 30 times over photo copies that look like little more than gray spots on a page.
Thanks,
Mike
In another thread you wrote that when converting the head for 14mm plugs, you need to use two gaskets. Are you taking about the compression ring that comes on the plugs? Or the copper cylinder/head gasket?
Also, I got my 14mm spark plug cap kit and my Ignition module today. Is there a "how-to" thread on installing the cap kit?
I looked around a bit but could find anything. Thought maybe you guys would know as the instructions that came with my kit are very sparse and the pictures are 30 times over photo copies that look like little more than gray spots on a page.
Thanks,
Mike
#43
My Feedback: (1)
Join Date: Jan 2002
Location: Riverton,
WY
Posts: 3,114
Likes: 0
Received 0 Likes
on
0 Posts
RE: Super Tiger 3250 on gas
The head may be a bit to thin when you tap it for 10mm. Then the spark plug will stick to far into the chamber, thats when you need to make a spacer or use 2 gaskets