3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
Yea when u get a chip, most likely you will have to upgrade to 91 or above octane. I dont really know the reason why, but its probably so the chip can perform with its best results with a higher grade fuel.
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Black 4 door 1990 325i
15"x7.5 Ronal LS-wrapped in 205/50-15 Bridgestone Potenza G009
I asked a few months ago, specifically about the Jim Conforti, and I heard quite a few people use the 89 Octan just fine with it. I don't think it'll hurt to use lower-grade gas, but you just won't be getting as much of an advntage from the chip that way.
Ok.. use the search feature and look up octane... (I'm on a slower internet right now.. or I would do it for you).. there is a great topic about what the octane actually does for the ECU and chip together and in the end; why it is needed.
In short: Mainly speaking of the Jim C. chip... it changes your fuel mapping.. and cam timing to better use the higher octane... more power usefulness...
yeah, it'll probably run just fine but you won't be gaining the hp from the chip if you use a lower octane gas. just get the better gas, if you have a bmw you should be treating it that good anyway, your car will last longer.
with the 93 octane i've been told just use a octance booster and you'l be fine there even if you use a cheap one your still boosting it. speaking of chips hey whats this MarkD chip is it any good? do they make for 325super eta's? where do you get it?
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Use 91 octane because if you don't your car will ping. That equals bad! The chip advances your timing which gives you more power and the higher octane gas burns slower than the lower octane so you could get away with 87 octane and a chip but the nmoney you save on gas probably wont amount to the bill when you need a new engine.
IF YOU ARE DRIVING AN 86 325es THAN YOU DEFINATELY DO NOT HAVE TO CHANGE YOUR OCTANE.. THE IGNITION/FUEL CURVE WILL CHANGE WITH THE NEW CHIP BUT ETA IS A LOW COMPRESSION ENGINE, THEREFORE YOU WILL NOT GET PING OR ANYTHING LIKE THAT.. IT WOULD NOT HURT TO PUT IN A LOWER TEMP THERMOSTAT THOUGH..
THE BEST BANG FOR YOUR BUCK ON THAT CAR WOULD INDEED BE A CHIP, INTAKE (HOMEMADE ONE'S ARE FUN) YOU NEED TO FIND A 325I FROM THE JUNKYARD AND GET THE EXHAUST FROM IT, 325I HAS DUALS THAT RUN PARALEL TO ONE ANOTHER, 325e(s) ONLY HAS A SINGLE EXHAUST(unless it is an 88, super ETA)
YOU CAN PUNCH OUT THE CAT. AS WELL....(all backyard shit..)
IF YOU HAVE A DREMMEL TOOL, YOU CAN PORT/POLISH THE INTAKE MANIFOLD.
UNFORTUNATELY YOU CAN ONLY GET SO MUCH OUT OF THIS MOTOR BECAUSE OF THE WEAK CYLINDER HEAD, MADE FOR ECONOMY NOT POWER.. IF YOU WANT TO HAVE FUN THOUGH, EITHER SWAP MOTOR FROM AN "I" OR SAVE UP FOR ONE!! GOOD LUCK MAN
thanks guys for the advice i think iam going to try and get a chip but which ones are good im thinking bavarain autosport would be good but im not sure i would really like AC Schnister what do you guys think ?
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