kurtf5

Last summer i had problems with my Savage engine.
Its still pretty new with good compression, though like most Savages it does get half tank lean.
Im running 25% odonnell fuel in it (though quite old fuel now). When tuning it last year i would fine tune it so it ran really well, then without any warning it would die at about half a tank. Would fire straight up again though but its still very annoying.
Also when screaming down the road in 3rd gear (its the limited edition model with 3 speed as stock) when its been in 3rd gear and at full speed it makes a gargling sound like its starving of fuel because its too lean, but no matter how i tune it thats how it sounds. Is it just because i have a rubber exhaust deflector on it or is that just how it is?
Just seems like a difficult engine to tune, the one on my Swift 2 buggy and TS4N were so much easier in comparison.


Also which % fuel should i use? I find 20% too oily for my cars particularly the Savage again, and as my 25% Odonnell is old (about 4 years old actually) and is discontinued in the UK, is it safe to run 30% or not?

Thanks

fxrs

As you go up in nitro percentage as in 25 percent or 30 percent you sould go to
a cooler plug. I Have the limited edition also. The nitrostar in it has been ported
and polished. I had to switch to a cooler plug. I run an HPI R5 and it
runs fine.

kurtf5

Oh i thought the nitro star in the LE was stock like on a normal Savage.
What does ported mean? And i run a cool plug anyway, but is 30% ok for nitro engines in general or is it too much?

BudBud

I have been running basically Byron's 30 Gen 2 Race fuel ever since it first came out. It is awesome stuff and I run it in everything 21 through 36. It is a lower oil content, but a lot higher quality synthetic lube. I will also buy O'Donnell's Race 30 and when the fuel shortage was on I burned a lot of Trinity 30 and 35. Last year I burned about 16 gallons of fuel, mostly Trinity. Glen

fxrs

Sorry about that. The engine was stock like yours but I
did the work to it following an artical I read in an RC mag.
I run Byrons 30 percent and have for many gallons.
Still runs great.

bigwaltc

If you cant tune the lean out you have a air leak some place seal up your engine [sm=shades_smile.gif]