Octane for b230f+t?
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Octane for b230f+t?
What octane fuel should I run in a b230f+t? I haven’t done the conversion yet but I’m planning on running about 7psi of boost as to not kill my engine. Would it be easy enough to do an e85 conversion? I’ve read 93 octane gas is required but I’m not sure. My regular gas station has 91 octane, would that work? Thanks!
no mo volvo
Joined: Oct 2010
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From: 37 North on the left coast
there's two different ways of measuring octane. the USA uses "(R+M)/2" while much of the rest of the world uses R or research octane. R numbers tend to be higher fort he same fuel.
You *can* run a US B230FT on normal US regular gas if you never push it hard, but it will have a tendancy to ping/knock at upper middle RPMs under heavy loads, like full throttle acceleration up a grade, especially in hot weather. the knock sensors should pick up on this, and retard the ignition sufficiently to prevent engine damage,
I always ran USA 'super' or 'premium', RM/2 of 91 in mine, and I used the throttle a lot. RM/2 of 91 is about equivalent to R octane of 93 or 95.
an aftermarket conversion, all bets are off. the B230FT engines have lower compression, like 7:1 instead of 9.5:1 or whatever for the B230F. the 7-9 PSI boost of the turbo makes up for this. they also have different cams, and different ECU/ICU programming.
oh, at high altitudes, like above 7000 feet, high octane is less useful, in fact, in many rural places in Nevada, etc where the elevations are up there, you won't even find premium gas, the regular 87 RM/2 stuff will work just fine.
You *can* run a US B230FT on normal US regular gas if you never push it hard, but it will have a tendancy to ping/knock at upper middle RPMs under heavy loads, like full throttle acceleration up a grade, especially in hot weather. the knock sensors should pick up on this, and retard the ignition sufficiently to prevent engine damage,
I always ran USA 'super' or 'premium', RM/2 of 91 in mine, and I used the throttle a lot. RM/2 of 91 is about equivalent to R octane of 93 or 95.
an aftermarket conversion, all bets are off. the B230FT engines have lower compression, like 7:1 instead of 9.5:1 or whatever for the B230F. the 7-9 PSI boost of the turbo makes up for this. they also have different cams, and different ECU/ICU programming.
oh, at high altitudes, like above 7000 feet, high octane is less useful, in fact, in many rural places in Nevada, etc where the elevations are up there, you won't even find premium gas, the regular 87 RM/2 stuff will work just fine.
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Joined: Oct 2019
Posts: 88
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there's two different ways of measuring octane. the USA uses "(R+M)/2" while much of the rest of the world uses R or research octane. R numbers tend to be higher fort he same fuel.
You *can* run a US B230FT on normal US regular gas if you never push it hard, but it will have a tendancy to ping/knock at upper middle RPMs under heavy loads, like full throttle acceleration up a grade, especially in hot weather. the knock sensors should pick up on this, and retard the ignition sufficiently to prevent engine damage,
I always ran USA 'super' or 'premium', RM/2 of 91 in mine, and I used the throttle a lot. RM/2 of 91 is about equivalent to R octane of 93 or 95.
an aftermarket conversion, all bets are off. the B230FT engines have lower compression, like 7:1 instead of 9.5:1 or whatever for the B230F. the 7-9 PSI boost of the turbo makes up for this. they also have different cams, and different ECU/ICU programming.
oh, at high altitudes, like above 7000 feet, high octane is less useful, in fact, in many rural places in Nevada, etc where the elevations are up there, you won't even find premium gas, the regular 87 RM/2 stuff will work just fine.
You *can* run a US B230FT on normal US regular gas if you never push it hard, but it will have a tendancy to ping/knock at upper middle RPMs under heavy loads, like full throttle acceleration up a grade, especially in hot weather. the knock sensors should pick up on this, and retard the ignition sufficiently to prevent engine damage,
I always ran USA 'super' or 'premium', RM/2 of 91 in mine, and I used the throttle a lot. RM/2 of 91 is about equivalent to R octane of 93 or 95.
an aftermarket conversion, all bets are off. the B230FT engines have lower compression, like 7:1 instead of 9.5:1 or whatever for the B230F. the 7-9 PSI boost of the turbo makes up for this. they also have different cams, and different ECU/ICU programming.
oh, at high altitudes, like above 7000 feet, high octane is less useful, in fact, in many rural places in Nevada, etc where the elevations are up there, you won't even find premium gas, the regular 87 RM/2 stuff will work just fine.
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