Slant Six Forum
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how low can i go
https://slantsix.org/forum/viewtopic.php?t=8892
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Author:  steponmebbbboom [ Wed Apr 07, 2004 6:01 pm ]
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Heh... Ive seen as much as a $.10 spread during my morning commute. :shock:

This is per litre of gas, remember.

Author:  Pierre [ Wed Apr 07, 2004 7:15 pm ]
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Well I should clarify, the $2.11 was for chevron, cheaper stations like Valero, at the same time, are running 87 octane for $1.99 but I won't go near that stuff. Chevron or bust usually.

30 miles in one direction and you go up a few cents, 60 miles in the other direction (Silicon Valley) and your liable to go up a quarter :shock: .

Author:  moparfreak [ Wed Apr 07, 2004 7:26 pm ]
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guys i didn't put this up for a gas price comparison i'm trying to find something out how much compression before i can't run 87 octane

Author:  70valiant [ Thu Apr 08, 2004 4:58 pm ]
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Like I said I took 0.100" off and cant run 87 octane. I would think 0.060-0.070" would be ok
P.S. I spent $1.87/gallon for 93 octane today

Author:  lgu32 [ Thu Apr 08, 2004 10:45 pm ]
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As many other things, my slant head was milled w/o measurements. The dynamic compression test (measured from spark plug hole when rotating the engine with starter) gives 1.2 - 1.3 MPa readings (174 - 188 PSI).

This is not too much for the 95E fuel sold here. As well I have not checked the timing mark, if it is located correctly or not. Timing light says, this engine has about 10 degrees on idle and 30-32 degrees at 3000 rpm up.

Fuel price 1.1 €/L (~5US$/USGal).

Author:  moparfreak [ Thu Apr 08, 2004 11:02 pm ]
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thank so i should be safe with 0.020 off both head and block and don't worry i was just being a smart ass and 75.2 last time i gassed up anything but thats canadian dollars and by the liter for 87 octane to boot if only gass prices returned to what they were 10 years ago

Author:  steponmebbbboom [ Fri Apr 09, 2004 7:12 am ]
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The block doesnt usually warp, so other than correcting deck height for race purposes, you don't really need to, plus it will wipe out your engine serial number. I would just check the deck surface with a feeler gauge and if it's good, leave it as is.

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