fuel questions (New to 4 strokes?)

[D Morgan]

can one burn av gas safely in a turbo apex @ 18lbs

 

[reg28]

It depends on what turbo kit you have, what elevation you ride and also if you have a head shim or not.

 

[JohnBoyTurbo]

We need some more info if you are looking to have your question answered.

 

[MrMorgan]

are you talking 100 low lead? At 18 lbs boost? Hmmm. My buddy is running 92 octane at 14 lbs boost...

 

[MrMorgan]

I don't see a problem with the fuel, as we run it in the quads sometimes. It's whether the octane is high enough to prevent detonation caused by higher temps, right?

 

[JohnBoyTurbo]

I was told you are safe at any elevation running up to 16lbs with av gas (100LL). To make the jump to 18lbs you should be at least at 6000 feet.

 

[boosted metal]

I have ran aviation in my past 3 turbos w no issues. You are pushing the limit at 18 pds. i am assuming the motor is shimmed or low comp pistons. What turbo are you running. A garret 2554 will not pull that, prob g28? What elevation are you running?

 

[D Morgan]

rods and low comp and .060 head shim has allready been done . Im running mcx rear mount kit 310 hp @ 2500 to 6000 ft. (Pine Pass).
Have been beating on cats for the past 3 years, traded my 08 600 sno pro for this thing. Any helpfull hints on these snow machines will be awsome.

been picking up fat chicks at the bar lately just trying to get used to throwing around big girls.

 

[JohnBoyTurbo]

Sounds like that sled is ready for whatever you can throw at it. Should be no problem to run Straight Av Gas.

And don't worry the deeper the snow the more she feels like a skinny chick.

 

[kgr]

my apex would not run at 6000' on race gas. i could only use shell gold.

 

[boosted metal]

why does the sled have low comps and head shim. What ratio are the pistons.

 

[overkill131313]

I have a 06 mcx rear mount 310.....with a head shim. I run 50-50 chevron 94 and 100LL (av-gas) at 5-8000 feet at 18 psi. butI have turned down the boost to 14 psi and still keep the same mixture........so I can just turn up the boost when needed.

 

[Prairie Dog]

Had an MCX Apex......ran 17lbs on straight AV gas and never had a problem except my cheeks hurt from smiling:d

 

[kgr]

At 2000' or lower i am thinking ...........right.