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05-29-2002, 10:12 PM
Will using a mixture of 92 and 100 octane fuel make a noticeable improvement in performance in a SC'ed 530i? I assume the ECU will be able to retard timing less due to less pinging/pre-detonation.

On the other hand could it cause harm. I am not talking about using octane booster, either. Real factory gas.

One more, is an intercooler more effective than the octane booster? Hell, what about both!

05-30-2002, 12:31 AM
The aviation 130 octane green gas was always great.
Long a go in a far off galaxy etc and etc.

The intercooler also packs the fuel charge tighter providing more power for given boost.

The added octane shoud stop the pings and also the retarted timing caused by pings and lower boost contoller settings.

Looks like a win win good deal to me.

Have you thought about installing air fuel mixture sensing and shutting off or over riding the ping and knock detection system?

All aviation systems run without them. They cause timing changes for pings.

During Indy race I heard them saying that a driver had already used up his alocated ethynal injection fluid. They inject into the intake after the turbo to cool and to provide a small boost. It is like low pressure NOS. Not much, just enough.

Injecting water mixture also cleans the carbon and fuel deposits from valves and combustion chamber, both very good on charged systems.

Ron Carter<br><img src="" height=200 width=468>

05-30-2002, 06:31 AM
I assume it would be installed in the exhaust manifold. Would you need to tap into it, or is there an easier way?

Is aviation fuel safe to use? I thought I saw a post in the "search" stating that it had components not appropriate for autos. I don't plan to use octane boosters, however. After, how many miles would you suggest using water injection to clean the top end. How much water does it take?

Sorry for all the questions, but you seem to know something about this. Thanks in advance!!!!!!

05-30-2002, 04:59 PM
Hi Coop,

I have included the WEB site for the air fuel ratio indicator.

Parasites off the present 02 sensor at the SII reset plug under the hood. I have the analog one mounted under the hood and a second flashing light one on order with my Mass Air Flow conversion from BMP. Here is a picture of my Cartech rising rate FMU and the analog indicator with a boost guage.
<img src="">

On the aviation fuel, nothing missing except they use no additives to absorb water such as etynal. You do not want that with Bosch injection anyway. The funny thing is that there are airport taxes on aviation fuel so no highway taxes. Makes it a little cheaper than regular at the discount retailers. 130 octane makes great racing fuel.

Ron Carter
<br><img src="" height=200 width=468>

05-30-2002, 10:16 PM

KC Ron Carter
05-30-2002, 11:21 PM
together to supply a nulling affect.

I will check that out if I can.

They are all based on the Bosch Stoichmetric (STOICH) 14.7 to 1
That is a 0 to 1 volt range. It is a redialed volt meter and that is why it can parasite the input from the engine ECU sensor.

The Nordskog analog indicator actually includes a buffer box in series to dampen the movement.

Ron Carter

05-31-2002, 07:13 AM

07-03-2002, 12:09 PM
Check out the activemotorwekes site for their EtOH/H2O injection system for FI bimmers. It seems like a good idea to me. The system they sell is made in the U.K.

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