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Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 06-10-2006, 11:23 PM   #101
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How can you tell?
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Old 06-11-2006, 12:09 AM   #102
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Because the car was stumbling up until about 4500 rpm'*.
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Old 06-11-2006, 12:48 AM   #103
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Oh, in that case it'* safe for me to pop on that smaller pulley.

How much 50/50 does your reservoir hold?

After short 5 minute spirited drive with a couple of 6000 rpm blasts my level went down about 1/6 of its 2 litre capacity and there was no stumbling.

Did you say that the PCM needs about 160 km (100 mi) to "learn" the new pulley for the fuel table adjustment?
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Old 06-11-2006, 01:59 AM   #104
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What'* with the black PVC looking tank?
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Old 06-11-2006, 02:07 AM   #105
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That'* Bill'* homemade custom pressurized water injection tank.
He fill it with a 50/50 mix, pressurizes it and then has developed the electronics to safely inject it for cooling effect.
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Old 06-11-2006, 02:09 AM   #106
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Is the ELC capable of keeping the pressure up in the tank? It'* not a particularly high volume pump.
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Old 06-11-2006, 02:12 AM   #107
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Bill can correct me if I'm wrong but I believe he only pressurizes it once and then only uses it for track runs.

The system I have uses a separate high pressure low volume injection pump.
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Old 06-13-2006, 10:45 AM   #108
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Quote:
Originally Posted by 2000SilverBullet
Bill can correct me if I'm wrong but I believe he only pressurizes it once and then only uses it for track runs.
That'* correct. For now, anyway. And I just mixed up a 30% methanol mix for the drive to work.

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Old 06-15-2006, 02:04 AM   #109
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I have been playing

Turning pressures down a little at a time until the tires spin on the 1st to second shift.

Adjusting the turn on boost pressure and flow curve. It comes on about 2700 rpm and peaks at 6000 rpm.

It uses a lot of volume with no bogging. This system can only be used for short periods....like track runs.

The good news is it really does reduce temperatures, with readings taken before and after indicating a 20 F drop in SC housing temp. That'* a lot

Now it'* time to experiment with pulley sizes.

Bill - When you use your system at the track, will you be going to a smaller pulley or increasing your timing
If not, then you must have KR now that you have to control
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Old 06-15-2006, 09:48 AM   #110
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I'm already running a far smaller pulley than anyone has ever run on a Gen3 M62 that I know of, and have no KR other than maybe 1-2 at the top. However, I know that'* going to be worse in the summer heat.

The reason I'm messing with water injection is because I've been messing with it for 3 years, and I'm not done yet.

In addition to that, I know for certain that I'm producing a ton of boost charge heat with that 2.2" pulley. That heat isn't helping me. In fact, it may be hurting me to the point that I should switch to a 2.3" or 2.4" pulley to prevent the heated charge i the LIM.

Unless the water injection counteracts it.

John, the ELC pump works fine with the tank. It takes very little time to charge it to 65psi. After 3 track runs or so, I'll top it off while icing down and cooling off in the staging lanes. Top offs from 40-65psi take about 30 seconds. The tank is only a 2-gallon capacity to begin with, and I usually only fill it with 1 gallon of water. That leaves one gallon of volume for air, as water doesn't compress.
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