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Old 11-02-2002, 07:35 PM   #1
gpatmac
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psm

Default Help me make sense of this.

This is after I turned my ABC up about 3.5 turns. I was at the track, Hawaii Raceway Park, which is ~sea level.
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Old 11-02-2002, 07:43 PM   #2
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And this was on the drive home, in 5th gear.

I know I don't want 17lbs of boost, especially not in 5th gear when I'm not even approaching that in 1-3 gears.
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Old 11-02-2002, 07:58 PM   #3
nmyeti
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From the looks of it, you need to re-map your boost control solenoid duty cycle. Often times you'll have to change your boost at the track vs. when you drive the car home. For instance at the track you'd never roll it on in 5th gear at low RPM. At the track because of the different type of load that you put your car under you'll need to increase the duty cycle quite a bit.

The good news is that closed loop is just around the corner.

-Nathan
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Old 11-02-2002, 08:00 PM   #4
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Thanks Nathan,

Any comment on that det. event?

Pat
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Old 11-02-2002, 08:03 PM   #5
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Quote:
Originally posted by gpatmac
Thanks Nathan,

Any comment on that det. event?

Pat
Was the frist log taken from a "launch?"

The reason i ask is because right next to the red spot, it shows you were running lean. This happens often on a subaru when the fuel sloshes around from launching or driving hard at the track.

-Nathan
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Old 11-02-2002, 08:21 PM   #6
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Yes, and it was also recovering from a bog.
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Old 11-02-2002, 08:54 PM   #7
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you might want to try and run with just a shade more gas in the tank...
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Old 11-03-2002, 02:05 AM   #8
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ok, roger.

Thanks
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Old 11-03-2002, 11:30 AM   #9
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Nathan,

For setting the boost, what would be the suggested technique? Adding (or subtracting) 1 or 2 points all the way down the map, or by identifying those rpm points where I don't think I'm getting enough boost?

For instance, in one of your last posts, you say that I might want to consider a 'race' map vs. a 'street' map. I guess what I should learn from that is that it doesn't matter what gear I'm in, when I hit, for instance, 5000 rpms I will get 15.1 lbs-so I can adjust according to rpm. What will the open loop give us, then? The ability to control how much in each gear? That makes me wonder. Depending on what gear I'm in, wouldn't the throttle position be different for 5000 in 3rd gear than it would for 5000 in 4th gear? I guess it's relative.

Thanks,

Pat
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Old 11-03-2002, 02:23 PM   #10
nmyeti
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Quote:
Originally posted by gpatmac
Nathan,

For setting the boost, what would be the suggested technique? Adding (or subtracting) 1 or 2 points all the way down the map, or by identifying those rpm points where I don't think I'm getting enough boost?

For instance, in one of your last posts, you say that I might want to consider a 'race' map vs. a 'street' map. I guess what I should learn from that is that it doesn't matter what gear I'm in, when I hit, for instance, 5000 rpms I will get 15.1 lbs-so I can adjust according to rpm. What will the open loop give us, then? The ability to control how much in each gear? That makes me wonder. Depending on what gear I'm in, wouldn't the throttle position be different for 5000 in 3rd gear than it would for 5000 in 4th gear? I guess it's relative.

Thanks,

Pat
Pat,
the car is under vastly different loads on the track than on the street. If you are the kind of person who likes to stomp the gas at 2500rpms in 5th, then you are going to have to reduce the duty cycle numbers early on to make sure that you don't over boost.

If you are on the track you can run very high duty cycles in the early rpm range because you don't spend much time in those load points.

Unfortunately the open loop control that you have right now is limited in what it can accomplish and has a hard time giving you both fast spool and stable boost control.

The newest version of the UTEC software is pretty much finished and as soon as it gets the seal of approval from our Bata-testers you'll have the new closed loop version. So far it works very well to give you the fastest spool with stable boost control and consistent boost in all situations where you load the car enough to produce your target level.

-Nathan
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Old 11-03-2002, 02:35 PM   #11
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Quote:
Originally posted by nmyeti


Pat,
the car is under vastly different loads on the track than on the street. If you are the kind of person who likes to stomp the gas at 2500rpms in 5th, then you are going to have to reduce the duty cycle numbers early on to make sure that you don't over boost.

If you are on the track you can run very high duty cycles in the early rpm range because you don't spend much time in those load points.

Unfortunately the open loop control that you have right now is limited in what it can accomplish and has a hard time giving you both fast spool and stable boost control.

The newest version of the UTEC software is pretty much finished and as soon as it gets the seal of approval from our Bata-testers you'll have the new closed loop version. So far it works very well to give you the fastest spool with stable boost control and consistent boost in all situations where you load the car enough to produce your target level.

-Nathan
Hurray for closed loop boost control

I know it's been asked before Nathan but do you have an ETA on it??
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Old 11-03-2002, 05:27 PM   #12
HonduhEater
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an eta would be great
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Old 11-03-2002, 06:06 PM   #13
nmyeti
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Quote:
Originally posted by HonduhEater
an eta would be great
Not going to give one just yet. When we've finished with the testing process we'll announce that it's ready.

-Nathan
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