is 87octane ok w/ N20 for an N/A?
i have search on this and read the whole nitrous write-up by scathcart. but i haven't seen any info on octane levels and nitrous. so is 87octane ok or am i going to have to bump to 91? also i know timing is good stock up to a 75 shot but is that with other mods i'm putting a RB off-road header to straight pipe and i've got a ported Intake that will be going on.
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NO. Octane requirements depend on jetting size.
Also, there is a habit of N/A owners to bump their timing advance. Don't do this. Minimalistic gains during normal use, and not worth any risk with forced induction. |
man that was quick, thanks.
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Originally posted by theflatlander man that was quick, thanks. Generally, increase by 40 points octane for every 50 hp increase in jetting. Here's my rule of thumb: <40hp: 87 Octane, stock timing. 40-50hp: 89 Octane, stock timing. 50-75hp: 91 Octane, stock timing 75-100hp: 94 octane, 2 degrees WOT retard. 150 hp: 98 octane (4:1 94 pump gas/tolulene), 4 degrees WOT retard 200 hp: 104 octane (1:1 94 pump gas/tolulene), 6 degrees WOT retard. 250 hp: 110 octane (Avgas), 9 degrees WOT retard. 120:1 Premix used in all situations. This is for 86-91 N/A's, assuming supportive mods existed for each power level. |
scathcart nose his nauce
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Posting so I can find this later, great info.
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Originally posted by Lodivigo Posting so I can find this later, great info. |
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