tempurature recomended 300-320?!?

[lykan]

I read his at the traxxas site (TRX .15 PRO). It seems to me that my engine runs best around 280-290, but following the general rule of thumb I am trying to get it to run 250-270 without much luck It just wants to run right below or at 300deg So I went to get the factory settings and came across this \/

To tune the engine for maximum power. Turn the mixture screw in (clockwise) 1/16 of a turn and continue driving. Note any increase in speed and performance. Continue to lean the fuel mixture in 1/16 turn increments until :

1) There is no longer any performance increase or
2) The engine begins to cut out at high speed or
3) The engine begins to overheat

If you are using a digital temperature gauge, the Pro .15 tuned for performance runs in the range of 300° to 320° F.

:

I know this is what they reccomend, but is it safe? Having a hard time beleiving traxxas recomending these temps.

 

[SkyMaxx]

For that particular engine, you have to work really hard to get performance at temperatures other than that. The TRX Pro .15 is a hot running engine. I think it was designed that way. If your engine is a TRX Pro .15 and is running well at the 280 to 290 mark, consider that a good thing and keep it there. Any thing cooler and you are probably running slobbering rich or have an aftermarket cooling head and are running rich.

 

[X_Gamer7]

Yup, that seems right. I read another guys post about his Fantom engine, and they reccomended something like 340F to 360F

 

[NCNitro]

My first one back in the day ran very good at those temps, until the rod came apart at wot, then...silence, lol. Anyway, I could never get it to run good in the lower 200s, 280-290 was the norm.

 

[militarymaxx]

I have heard that the smaller engines do run hotter than that of their bigger cousins. When they talk of maximum power, they're talking lean. Max power is going to be a lean tuned engine. Keep in mind that those numbers, albeit correct for that particular engine, won't go over well with other engines.

 

[lykan]

OK here's another for you.

When I hit the throttle to take off the RPMS dip then it takes off.

I put it up on a stand with the same result. A brief pause (dip in rpms) then it starts to move up in rpm, and from half throttle on acceleration is instant.

I am wondering if that is lean, or rich on the low end? It's just too damned hard for me to tell.

Coming down from a high speed run it does the same, once it goes to idle, sometimes if I hit the throttle hard and quick, it will just die.

 

[Chevy-SS]

Are you getting some smoke when you hit it? If not, it may be too lean. Easy test for LSN is: run truck around and let warm up good, make some power passes then bring truck in and let idle down. Pinch fuel line; if it dies immediately, LSN is too lean.

In LSN pinch test, engine should run for 3 to 5 seconds, speed up a little, then die. If it keeps idling for longer than 5 seconds with line pinched, then you are probably too rich. Pinch test is very easy to do and will get you in the ballpark for LSN setting.

 

[scottm]

I think it is probably too lean on the low end. A simptom is the fast idle that takes a few seconds to die down. That makes jumping hard too. Chevy-ss advice is right on. You probably need 1/8-1/4 richer on the lsn.

 

[CNSelf]

Where would you find an engine's factory-recommended running temp?

 

[lykan]

Let me dig up a linkHere you go

Its below their little temp-O-meter graphic.