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Old 04-07-2002, 04:29 PM   #1
DeusExMachina
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Default What octane for complete Brullen exhaust?

I'm going to be installing my Brullen exhaust in 2 weeks, and I currently run 87. I need to get gas today anyway, do you think I should start on 89? I'll have upgraded headers, cats, cat-back and muffler, as well as an intake. Thanks.
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Old 04-07-2002, 06:57 PM   #2
HndaTch627
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i run 89 on winter blend cause hte gas is just crappy but 87 during the summer. The exhaust have nothing to do with octane, it's about compression ratios and timing.

jeremy
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Old 04-07-2002, 07:34 PM   #3
SubaruStu
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I've seen no real difference running 89 over 87 with the full setup.

Stu
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Old 04-07-2002, 07:54 PM   #4
HndaTch627
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Quote:
Originally posted by SubaruStu
I've seen no real difference running 89 over 87 with the full setup.

Stu
i noticed with the unseasonable weather that my mileage went from 15-16 MPG back to 20 and now back to 18 again with the onset of the colder weather. And i am TOTAL disbelieve of using 89 in a car that was built for 87, i just think that it being 55 in january was causing the highly oxygenated winter fuel to evaporate before it ever hit the injectors.

jeremy
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Old 04-08-2002, 12:06 PM   #5
Jaxx
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87 till it reaches ~100 degrees outside ...

then 89

other wise it will knock and the learning ecu will pull back some timing..
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