QUESTION about Race Fuel ; engine failure

[Pastor]

Do you know of anyone that has blown an Apex motor above 8000 feet on straight 110 or higher octane race fuel?

I am wondering if you ran too lean on 110 or higher if the fuel would preignite or would the machine just not run right?

If you do know of anyone that has blown a motor on 110 or higher what boost were they running?

Thanks for the input.

 

[addictedtoboost]

Do you know of anyone that has blown an Apex motor above 8000 feet on straight 110 or higher octane race fuel?

I am wondering if you ran too lean on 110 or higher if the fuel would preignite or would the machine just not run right?

If you do know of anyone that has blown a motor on 110 or higher what boost were they running?

Thanks for the input.

There are many factors that play in to blowing an engine.

Water Temp
Exhaust gas temp
Boost pressure
Air Fuel mixture
Timing
Base compression ratio
Age of and kind of fuel used
fuel pressure
injector size
intercooler size and or Charge air temps.

Put numbers next to all these and we can help determine what went wrong.

Ted.

 

[Pastor]

I have not had a problem, mine is running strong and I run straight 110 at 8000 ft elevation or higher. I am running 18 pounds boost with low compression pistons and the boondocker 2860 rs turbo.

My innovate 02 sensor went out so I am just being extra cautious right now while I try to decide what I want to replace it with.

 

[Remmy]

I was running 20 pounds of boost today @ 3,000-5,000 feet on Sunoco 110, deep pow with some aggressive long pulls and the sled killed it all day, ran awesome. I've got JE 10:1 pistons with a stock head gasket, no shim. You should be good for as much boost as that turbo can efficiently make at 8,000+, Just don't run out of the turbo's efficiency range or you will start creating more heat which can promote deto.

 

[Pastor]

We feel that 18lbs is about the max for effieciency with this turbo at our elevation 8-10000 feet.

What do you think?

 

[JSCC]

Hey Pastor, Scott with Diamond S told me he was running around 24lbs on that Titanium Nytro last weekend. 2860rs. I am sure it was out of its efficiency range, but seemed to haul the mail still, dont you think.
My machine was around 17-18 lbs this weekend as well, but I was running straight C16 to help with the stock compression.
Oh, and I have not ran a Air/fuel gauge minus the setup for 17lbs, for about 2000 miles. I think you will be fine........

 

[Remmy]

We feel that 18lbs is about the max for effieciency with this turbo at our elevation 8-10000 feet.

What do you think?

That sounds about right to me, if I remember correctly, that turbo remains at it's "peak" efficiency at 20 lbs. at sea level. I'm sure you probably aren't at its peak efficiency at those boost levels and elevation, but it should still be making good power. Personally, I wouldn't go any higher unless you drop in elevation by a few thousand feet.