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Turbo Charge air temps?

modrmk

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Dec 8, 2007
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Kemmerer, WY.
At what charge air temperature would one start to see detonation on pump gas? Basically, what temp. is to high on the charge temps?
 
D
Sep 14, 2006
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Very complex question.

depends on octane of fuel, engine compression, head design, A/F ratio.


Better question is how much more octane is needed to keep from detonating per say every 10 degree raise in charge temps.
 

modrmk

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Dec 8, 2007
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Kemmerer, WY.
OK, 91 octane, Polaris 800 Dragon with 2010 updated head and pistons, have not checked the compression though. Any ballpark #'s on the temperature?
 

Super Dave3

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Feb 15, 2003
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OK, 91 octane, Polaris 800 Dragon with 2010 updated head and pistons, have not checked the compression though. Any ballpark #'s on the temperature?

I would guess that anything over 150 degrees could induce some det issues. On my pump gas mini innercooler setup, I havent seen anything over 110 degrees.
 
R

rymo84

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Sep 14, 2008
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i have seen 255 deg. at 10psi at 10000ft, no innercooler.
thats on a long pull in deep pow. thinking about making a better cold air intake.
i think the bd box and temp sensor only goes to 255 deg.
 
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