benbishop98

iTrader: (3)

Hey everyone. I got a new MGT 8.0 and I think the break-in period is pretty much done. When i get it to almost peak tuning my temp gauge gets up to the mid 270's. Is that to hot? There is still plenty of smoke coming out of the exhaust and it doesn't act like it's to lean . Just want some reassurance.
Thanks,
Ben

got_nitro

iTrader: (24)

New engine pinch has a lot to do with the heat it creates, so does the fuel you are using. Although I believe the 8.0 is a Heli engine without a tappered sleeve and different head. Some fuels do not lube as well as others creating more engine heat. The % of nitro, plug and your tune are the #1 things to look at for heat. Also, I would not personally go by what a temp gauge says, I would go off performance and smoke like you mentioned, gauge's especially the blue duratrash and less expensive ones can be off big time. To answer your question though as long as the temp gauge is spot on, 270's sounds ok.

aqeel200

just an additional note,

270F at full tank and 270F at almost empty tank makes a whole lot of difference in the lifecyle of the engine.

benbishop98

iTrader: (3)

what do you mean by that? should it be hotter with a almost empty tank? is 270 to hot when the tank is full?

aqeel200

when the fuel in the tank is almost empty, thats the peak of the temps in the engine. when it is almost empty and the temp is at 270F, this means that when it is 1/2 full, it may be around 250-260F, and when it is full, it may be around 240-250F.

So, if your tank is full, and the temp is 270+F, as the fuel in the tank, decreases, temp will increase..maybe when it is almost empty, the temp will be ~300F.

this physics rule[the law of pyhsics] (pressure and volume) applies to all conventional RC fuel line system - from tank to combustion...unless, your RC fuel line system has a fuel injection - same amount of pressure/volume in your engine regardless of the amount of pressure/volume in your tank -

in conventional RC fuel line system, more fuel in tank the higher is the pressure, more volume of fuel goes into the carb..in comparison - lesser fuel in the tank - lesser pressure and lesser volume of fuel goes into the carb(leaner when compared to tank is full).

hope it helps.

coconut

So, that's why she turns from Queen to BITCH everytime my tank is almost empty. She just starts hauling ass and popping wheelies at just the slightest touch of the trigger.

aqeel200

hahaha. you put it in the right context.

DarkShadowMastr

Hey fellas I have a MGT 8.0 that I just got in yesterday. I finished the breakin process and when I went to begin tuning the engine..... Soon after the truck started showing that massive 8.0 power my temps began to get out of hand. By the end of my last tank yesterday I had been running it pretty hard and when I temped it it was like 340 degrees!

It had reached that 300 Mark a time or two and it's been close to that a lot. I've been trying to drown it in nitro and it seems to still be running hot no matter. Any suggestions would be awesome!

spookie

iTrader: (25)

Do you have airflow over the engine? If it's restricted, it won't matter how much fuel you pour into it trying to cool it. I see you're in Florida, land of heat and humidity. I had a summer body and a winter body, the summer had plenty of ventilation, the winter very little, in Oklahoma here, almost as bad as Florida lol.

I hate to say this, but one way to find out if air is restricted, run it a few times with body off and see if the engine stays alot cooler. If you put the body back on and the temp skyrockets, that's probably why.

got_nitro

iTrader: (24)

Once you reach those kind of temps it's not easy to drown it in fuel and lower temps. You have to start with that kind of tune to maintain temps. Understand that once your fuel is almost gone it will run leaner, that's why it's a good idea to tune accordingly at 1/2 tank. Also, as I mentioned in a earlier post, those engines are Heli engines with a ground head and do not have a tapered sleeve, they are easy to tune lean looking for power but in the process you'll overheat them. 30% VP ran the best in mine. Also, the factory lid has ample air flow. Some days it's just too hot to run any kind of decent tune....

DarkShadowMastr

The insanity has gone down quite a bit. Ran about 4 tanks through it where the temps never went above 270. I am switching to 20% Odonnell T-blend. This Byron's Gen2 Race 30% is just too much for the old girl I think. Too finicky.

I'll post my findings after a get a few tanks through it. At this point I've had to run it so rich that it will be a performance improvement even though I'm dropping down 10%.