turbo glow plugs

[alfredo colon]

I feel lost here, what are these turbo plugs? I almost feel i came out of a time warp...

is there any particular one better than the rest? what would a .18 OS engine benefit from running a turbo, instead of a say an OPS or Nova Rossi .21's running McCoy #9's @30% nitro? (70% if I could get my hands on a gallon that high)

 

[anthony_marquart]

The "turbo" plug is just a name for a conical seal glow plug. Instead of a brass or copper seal that comes with a regular plug. It does have a better seal but they are more expensive and I don't feel are worth the hassle..

 

[Chris Wood]

turbo plugs are not worth it.. you may MAY gain 500 rpm buy them if you are lucky.. but the cost ofset the gains twofold.

as for 70% no mfg mixes that high. unless you find someone that mixes fuel out of there house/garage that is the only way.

you can thank homeland security for that.

www.byronfuels.com mixes 55% that is what i run

 

[Ken Webb]

Try Fhs fuel (redmax) they show up to 80% nitro fuel on their price list. Use to be quality fuel. I assume it still is.

 

[Jim Allen]

The following test results were achieved with Nelson cold turbo plugs mounted in Nelson double bubble type heads. McCoy #9 plugs were also tested in the same type heads. Deck clearances of .001" to .011" were used. Fuels tested were 15% to 80% nitro with 8% oil. .15 to .21 cuin engines turned 1000 to 1200 RPM more; .40 to .45 cuin engines turned 800 to 1000 RPM more; .65 to .95 cuin engines turned 100 to 200 RPM more.

Jim Allen

 

[anthony_marquart]

seems like a bigger deal than I thought with the .21s,... Did the different type plug require a different deck height?

 

[RodneyPierce]

To each there own, but Ill stick with a standard glow plug.

 

[alfredo colon]

My curiosity comes from a JAE/.18 OS engine for sale on the forums; going through the engine specs I came across it being a turbo head plug.

I'd more than likely run 30% for the time, and am grateful for your input!!

 

[Jeremy Linney]

You can achieve similar results with a standard plug if you shim plug so that threaded portion of plug does not protrude into dome of combustion chamber. This allows a more natural turbulence to take place in combustion chamber and allows air/fuel mixture to a better and smoother path to the ignition source resulting in a more efficient burn. This in turn leads to more rpm's. By making more of a hemispherical combustion chamber with a less impeded flow to the ignition plug just like a turbo plug head.

 

[Charles Perdue]

You can achieve similar results with a standard plug if you shim plug so that threaded portion of plug does not protrude into dome of combustion chamber. This allows a more natural turbulence to take place in combustion chamber and allows air/fuel mixture to a better and smoother path to the ignition source resulting in a more efficient burn. This in turn leads to more rpm's. By making more of a hemispherical combustion chamber with a less impeded flow to the ignition plug just like a turbo plug head.

Just curious as to how you came to your conclusion. Do you have any test data to support it.

Charles

 

[LarryConrad]

I like the turbos because they are more durable in my .21's. I usually only get a few runs out of the hotter standard plugs because the filament wire is so fragile, the turbos last and last and last. It was an economic move for me to switch most of my small engines over. I still run standard plugs in my larger engines.

 

[Jack ODonnell]

You can achieve similar results with a standard plug if you shim plug so that threaded portion of plug does not protrude into dome of combustion chamber. This allows a more natural turbulence to take place in combustion chamber and allows air/fuel mixture to a better and smoother path to the ignition source resulting in a more efficient burn. This in turn leads to more rpm's. By making more of a hemispherical combustion chamber with a less impeded flow to the ignition plug just like a turbo plug head.

Just curious as to how you came to your conclusion. Do you have any test data to support it.

Charles

Charles, I would ask the same question

 

[Jeremy Linney]

Not with boats, but with offroad and Onroad 1/12 down to 1/8 scale. You just provide a cleaner path to the ignition source. Does this not make sense? Have no real hard factual data, just better lap times.and lower fuel consumption. Same principle of drag racers indexing their spark plugs to unshroud center electrode. Try it.

 

[moparbarn]

turbo plugs are not worth it.. you may MAY gain 500 rpm buy them if you are lucky.. but the cost ofset the gains twofold.

as for 70% no mfg mixes that high. unless you find someone that mixes fuel out of there house/garage that is the only way.

you can thank homeland security for that.

www.byronfuels.com mixes 55% that is what i run

redmax & technology fuel(john otto) will mix what you want . just got 65% from john at the fall nats.

 

[Will Gallagher]

I run Turbo Plugs in my MAC 21. I noticed a fairly significant increase in RPM. I have great results with the O Donnell 77 plug.....

 

[steve wood]

anyone have any idea where to buy a reamer to make a turbo head with

 

[wayne middlemiss]

anyone have any idea where to buy a reamer to make a turbo head with

Not sure steve but you can make you own

I reshaped the end of a carbide tiped drill

sounds bad but it actually works quite well

Greg

at a good chance a d bit would be ground to the required shape for this sort of operation. it would be worth your while to goto your local tool patern maker to have one made in a tool grinder.

and greg did you get the pipe off kris that donated to you.

 

[Ian Inverarity]

I had a toolmaker modify a normal high speed steel drill bit to cut the seat angle, it works well. Altho I have to be VERY careful not to get chatter on the final cut!! h34r:

https://www.intlwaters.com/gallery/displayimage.php?album=241&pos=99

 

[LarryConrad]

Steve,

Where would you ever be able to find a tool maker in the wilds of Burlington Iowa?

 

[ids987]

I haven't tried it myself - or got round to buying one to try, but I've read that a number 3 centre drill will get the job done, and has the correct 60 degree cutting face angle..........