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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 6:19 AM   
SLAYERDUDE



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From: CHICAGOLAND, IL, USA
Status: offline 		Not getting "hostile", I used to be the moderator at AE Forums on the MGT and MMGT sections, trust me there are plenty of 8.0 turd engines and mine is set at around 3 turns out from factory between the MSN and LSN for it to run right, but then again I have carb #1.
Not my first rodeo either, I'm guessing there's a #2 above the flywheel on your carb.

Just trying to give you some advice on the FOC, and yes once again I'm frustrated with the POS MGT 8.0 that has broken down just as often as the T-maxxes I've had, thus I'm still a Savage XL guy.
As I've said, when it runs good the MGT 8.0 is an animal, WHEN it runs good.
Since I bought mine back after trading it in for the Savage XL, and after tuning WAAAY richer from stock specs on the bottom it's ran great, until lately...



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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 6:50 AM   
The_Shark



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quote:

ORIGINAL: SLAYERDUDE

Not getting ''hostile'', I used to be the moderator at AE Forums on the MGT and MMGT sections, trust me there are plenty of 8.0 turd engines and mine is set at around 3 turns out from factory between the MSN and LSN for it to run right, but then again I have carb #1.
Not my first rodeo either, I'm guessing there's a #2 above the flywheel on your carb.

Just trying to give you some advice on the FOC, and yes once again I'm frustrated with the POS MGT 8.0 that has broken down just as often as the T-maxxes I've had, thus I'm still a Savage XL guy.
As I've said, when it runs good the MGT 8.0 is an animal, WHEN it runs good.
Since I bought mine back after trading it in for the Savage XL, and after tuning WAAAY richer from stock specs on the bottom it's ran great, until lately...



I never pay attention to how many turns it takes, if i get it to run great and it stays like that i'm happy. the engine has been running great, a little hot, but it's been great, only one flameout running too lean on a 100f day. im not sure what number carb it is, all i know is it has a tall heatsink, so I think its older.

I also rolled it going full speed, it cartwheeled at least 20 times, it TORE the proline extra thick body and bent the roll bar, I flipped it over and it was fine, I hit a cement block doing 30- nothing, ive landed at full throttle- no problem, its been wonderful for me, 100,000 times better than the T-crapp I had.

that mid-speed needle is very important, I notice if i tune the h/s and leave the M/s alone, I will have to adjust the L/s but if i adjust the M/s just a tad, it runs like clockwork- its not a easy engine to tune, and its pretty unconventional, but i'm happy.

I would replace ANYTHING that is worn, I have found out, If you only fix what breaks, it will break, and break and break, because the other parts are very close behind being broken, I replaced the knuckles, bearings, arm mount and diff case before I even ran because I know if I ignored those worn, but still functioning parts it would be nothing but a pile every 5 seconds.

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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 7:13 AM   
SLAYERDUDE



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From: CHICAGOLAND, IL, USA
Status: offline 		Some guys get them and they are bashproof, mine was brand new and was tight for about the first gallon or so.. beside breaking body mounts and I fixed that with springs.
Instead of clogging up this thread, here's where you can find all my MGT excursions.
http://www.rcuniverse.com/forum/m_10933009/tm.htm

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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 1:23 PM   
rgburrill



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Status: offline 		To rmh: smell a problem?  No way.  I love the smell of nitro in the morning.

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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 1:39 PM   
savagecommander


 

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ORIGINAL: 1QwkSport2.5r

The ignition system has little bearing on the temp at which an engine runs; its just coincidence that most ignition engines run on gasoline. Gasoline burns hotter because it doesn't have the cooling qualities that methanol does. Moreover, savagecommander, an ABC would get too hot and lose the piston seal relatively quickly and quit running. For the same reason 4-stroke model engines are AAC or ringed.


4 strokes are ringed because the fuel does not pass through the case- and lubercation is provided through the ring gap. Methanol does have a higher latent heat of vaporization, but the richer stoichometric ratio allows a hotter combustion event than gasoline- that=more power.

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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 3:03 PM   
Foxy



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From: Kingston UK, but living in Athens, GREECE
Status: offline 		Its all about compression and speed of combustion.

Have a read of this...

http://en.wikipedia.org/wiki/Gasoline

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RE: Gas engines and glow plug nitro engines, difference... - 7/18/2012 3:21 PM   
MTK



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From: Whippany, NJ, USA
Status: offline 		I bought a 1/5 scale truck with a small gas engine, 26cc, a few years ago. No CDI needed....magneto ignition with mechanical advance; simple simple!! Radio on 2.4 gig necessary and no issues with RFI....

Darned thing is practically impossible to kill and still goes like stink on regular gas and oil mix. Cheap to feed and even cheaper to maintain. No bearing issues, actually no issues of any kind in 5+ years of operation, just lots of fun

On a side matter, a gasoline engine may be operated as a glow engine putting out a bit more power, by mixing about 30% glow fuel with gasoline. That's a 30:70 ratio of 0% nitro glow with about 10% oil, to regular 30:1 gas il. The magneto or CDI would no longer be needed....But, other than that, why would one want to run glow fuel in a gasoline engine? Glow fuel causes the various maintenance issues we all experienced with glow engines. Gasoline does not cause those maintenance headaches


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RE: Gas engines and glow plug nitro engines, difference... - 7/20/2012 8:56 PM   
proanti1



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quote:

ORIGINAL: 1QwkSport2.5r


quote:

ORIGINAL: proanti1


quote:

ORIGINAL: savagecommander


quote:

ORIGINAL: 1QwkSport2.5r

The idea is out there though, and there are conversion kits for glow engines to run spark ignition but gasoline is a no-no in an ABC engine.


im curious to why you think that

Ignition engines run a lot hotter than nitro engines. You would need a ringed engine.

The ignition system has little bearing on the temp at which an engine runs; its just coincidence that most ignition engines run on gasoline. Gasoline burns hotter because it doesn't have the cooling qualities that methanol does. Moreover, savagecommander, an ABC would get too hot and lose the piston seal relatively quickly and quit running. For the same reason 4-stroke model engines are AAC or ringed.

... Ignition, meaning a gasoline burning engine, as apposed to a glow engine.

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RE: Gas engines and glow plug nitro engines, difference... - 7/21/2012 4:02 AM   
SLAYERDUDE



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quote:

ORIGINAL: proanti1


quote:

ORIGINAL: 1QwkSport2.5r


quote:

ORIGINAL: proanti1


quote:

ORIGINAL: savagecommander


quote:

ORIGINAL: 1QwkSport2.5r

The idea is out there though, and there are conversion kits for glow engines to run spark ignition but gasoline is a no-no in an ABC engine.


im curious to why you think that

Ignition engines run a lot hotter than nitro engines. You would need a ringed engine.

The ignition system has little bearing on the temp at which an engine runs; its just coincidence that most ignition engines run on gasoline. Gasoline burns hotter because it doesn't have the cooling qualities that methanol does. Moreover, savagecommander, an ABC would get too hot and lose the piston seal relatively quickly and quit running. For the same reason 4-stroke model engines are AAC or ringed.

... Ignition, meaning a gasoline burning engine, as apposed to a glow engine.

Technically "Ignition" is when the fuel ignites, whether spark induced or not, including a result of heat and compression...
Tell me a diesel engine does not rely on ignition to produce power, or even a rocket for that matter.
Ignition don't always mean that it burns gasoline, chief.

So, you are all wrong!



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RE: Gas engines and glow plug nitro engines, difference... - 7/21/2012 2:16 PM   
proanti1



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Status: offline 		In the model aviation world, ignition means gasoline burning, whereas glow means nitro. It's just a term. Probably derived from the fact that gasoline burning engines rely on an ignition system other than compression and platinum.

Regardless, we're arguing semantics, chief.

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RE: Gas engines and glow plug nitro engines, difference... - 7/21/2012 3:59 PM   
SLAYERDUDE



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Status: offline 		That's why we're here isn't it?

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RE: Gas engines and glow plug nitro engines, difference... - 7/22/2012 6:03 AM   
The_Shark



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quote:

ORIGINAL: SLAYERDUDE

That's why we're here isn't it?

I'm here to pick up some Chix

.....no luck yet

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RE: Gas engines and glow plug nitro engines, difference... - 7/22/2012 1:27 PM   
1QwkSport2.5r



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Status: offline 		I guess I should have gotten more specific in my last post and said Spark Ignition, instead of ignition.

I kinda feel like Darzeelon's spirit is roaming the forums...

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*Real* glow fuel is made with Methanol, Nitromethane, and Castor oil.

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RE: Gas engines and glow plug nitro engines, difference... - 7/25/2012 5:40 PM   
Paulino01


 

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From: AveiroPortugal, PORTUGAL
Status: offline 		Hi to all,
 I had problems with my computer, i muste  buyed a knew motherboard and know i´m going to read your msg´s and after i´ll respond to all!
 Stay well, Paulino

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RE: Gas engines and glow plug nitro engines, difference... - 9/7/2012 6:59 PM   
Paulino01


 

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From: AveiroPortugal, PORTUGAL
Status: offline 		Hi to all,
Tell me please and if you do´t mind ; the diameter of the  "spiral coil" of the 70´s FAI engines plugs is the same of the normal nitro glow plugs?!
 Best regards to you and to all here,
 Paulino                          Aveiro city :-) -  Portugal   

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RE: Gas engines and glow plug nitro engines, difference... - 9/8/2012 3:55 AM   
downunder



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quote:

ORIGINAL: 1QwkSport2.5r
I kinda feel like Darzeelon's spirit is roaming the forums...

MWAHAHAAA...thanks for that...coffee all over my keyboard

As for the coil used in glow plugs for FAI engines, they're the same as used in glow engines that have nitro added to the base fuel but will normally be a hotter heat range than is generally used for a fuel with nitro added. FAI (no nitro fuel) engines are still used today but it only applies to 3 classes of international competitions, control line speed, RC pylon and free flight power. These 3 classes rely on ultimate engine power for performance so what's called FAI fuel (80% methanol and 20% castor) is used to exclude any exotic (and dangerous) fuels.

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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> RE: Gas engines and glow plug nitro engines, differences and can a new engine be born?
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