really,really hot!!!!!

[jdtmaxx]

The engine in my dads tmaxx(2.5r)gets real hot. like 350. he cut holes in the body and richend it up, but it still gets hot.:mad:1 :036:

[BrianG]

Check the exhaust header and the gas tank for air leaks, and the drivetrain for binding.

[Serum]

Try setting it richer.

[jdtmaxx]

it cant get any richer.the gas tank and drive shafts are fine.

[Serum]

Ditch that nitro setup and get a brushless setup.

When you say that you are running it richer, I'm going to assume that you are referring to the high speed needle. If you have richened it up as much as you can and it still runs hot, the first thing that pops into my mind is that the bottom needs to be richened. Fat top and lean bottom = one hot running engine.

You might also want to check and make sure that you don't have any leaks in the pressure line between the fuel tank and exhaust pipe. This will also cause a lean situation.

No offense intended, but do you guys know how to tune a nitro engine? NEVER ever tune the bottom until the top is tuned and only tune when you have the engine up to running temps; something over 200F or so.

What I usually do is to set the bottom rich, so that the vehicle stutters from too much fuel when you take off and then it will clear out. At this point, you can tune the top so that the engine is giving good performance, while still showing a steady flow of smoke. When you have the top end tuned, I usually just tune the bottom so that it will idle for about 5 seconds before loading up.

One thing that you should avoid is tuning by temp. I've had O.S. RG engines that would run great at 275 all day long, but the Novarossis that I've had ran best at around 235. Just tune the engine until it sounds right, but I think that I'm safe in saying that 350 is way too hot and you probably damaged the piston/sleeve and maybe even the bearings or crankshaft.

I'm sorry that I can't articulate it any better than this, but tuning is a skill that you gain through experience.

Just as a start, try opening up the low speed needle by a half a turn and see what happens.

[Serum]

Does it smoke?

[jdtmaxx]

yes.

Well, if all looks fine but it runs hot, I'd look to the low speed needle.

[jdtmaxx]

he just set it back to the factory settings. but it still runs hot.

[crazyjr]

there has to be a leak somewherem check the tank for leaks and fuel line, also check the coupler between the pipe and header

[jdtmaxx]

there is no leaks at all. but the engine had five gallons of fuel run through it, could that be the problem?

If an engine is running hot like that and you don't have any binding, it pretty much has to be a lean situation.

If the motor has five gallons through it, its better days are definitely behind you. I'd first look to the bearings and check for excessive play. This is another reason why I never liked the pull starters and other gizmos that have something sticking out of the back of the engine for starting without a box. They leak.

[jdtmaxx]

but my tmaxx never had this problem.

[jdtmaxx]

Aangel we have had these trucks for 3 years, we know how to tune them. anyway, thank you everybody for trying to help.