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Old 05-06-2002, 09:58 PM   #1
JimmyOOOOO
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Question SBC-iD - Scramble not working

Just to test the workings of the device, I set channel 1 on auto at 14.5 psi, set channel 2 on auto at 7 psi, and set scramble to go to channel 2 for 5 seconds...

from a dead stop (-17 psi) to WOT, the boost shoots right up to 14.5. Any ideas?

I'll mention that I didn't receive any of the 'optional' harnesses with my SBC-iD... the only things I have plugged into the master control unit are the solenoid unit and the actual display unit. I'm not quite sure if anything else is required to use the scramble feature.

Thanks in advance,
Jimmy
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Old 05-06-2002, 10:25 PM   #2
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dang, this board moves fast !
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Old 05-06-2002, 10:36 PM   #3
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Just flip it!
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Old 05-06-2002, 10:42 PM   #4
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What happens when you shift into 2nd, 3rd? Does it go right to 14.5? From reading the directions it does not look like you need the harness or power-id for this feature.

Troy
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Old 05-06-2002, 10:49 PM   #5
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Quote:
Originally posted by Austin
Just flip it!
bro, thanks for the belly laugh

Quote:
What happens when you shift into 2nd, 3rd? Does it go right to 14.5? From reading the directions it does not look like you need the harness or power-id for this feature.
2nd and 3rd both go right to 14.5 psi after the shift.

I have the unit set on AC (actuator control) instead of WG (wastegate)... just in case that's an obvious mistake people were assuming nobody would make.
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Old 05-06-2002, 11:39 PM   #6
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In the instructions it says "Scramble Boost is operated by throttle response" this makes me wonder if you need the harness with one of it's connections tapping TPS for this to work.

Troy
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Old 05-06-2002, 11:53 PM   #7
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hrmmm... I figured the sudden pressure drop (invoked by letting off the throttle to change gears) was the trigger... but you could be right...



do you use the SBC-iD Troy?
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Old 05-07-2002, 12:20 AM   #8
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Not yet, I am waiting till I install turbo and injectors on Friday to see how it runs just of the unichip before I add a EBC to the mix. So I am just speculating off the instrcutions.

I would email Dan at Godspeed, he is as familiar with the SBC as anyone that I have talked to.

One other thing to try, make channel 4 the scamble channel, that is what is used in the instructions, it says use a channel that is only going to be used for scramble boost.

Troy
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Old 05-07-2002, 10:24 AM   #9
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god... are you out there?
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Old 05-07-2002, 10:58 AM   #10
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I would go post at clubwrx.net he seems to frequent that board more often. That or you could email him, that address is on his web site godspeed.hack.net it will probably be a few days before he gets back to you.

Troy
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Old 05-07-2002, 11:08 AM   #11
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yeah, I sent him an email... would be nice if it came with decent instructions in ENGLISH though
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Old 05-07-2002, 11:14 AM   #12
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OK- What I think you need to do is:

set your controller to channel 2 on the digital screen

on the scramble menu, select channel 1 and set the time to 2, 3, or 4 seconds, whatever you are looking for.... What this will give you is:

Channel 1, 14.5 psi for 2,3, or 4 seconds... THEN....

it will jump back to Channel 2, your 7psi setting for the rest of whatever gear you are in.

Scramble resets after the SBC sees pressure drop (shifting) and starts all over again in each gear.

You do not need the harness to use scramble boost. The harness is strictly for your viewing pleasure, the values received through the harness cannot be used as triggers for anything on the SBC

BTW- I am not able to get boost lower than 8 psi, thats because the wastegate spring is rated to about that pressure....

def

Also- Jimmy, sorry I missed your call... I was in a LONG meeting all morning, just got out... its 10:30am EST. Id been in there since 8am EST!!!
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Old 05-07-2002, 01:57 PM   #13
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Jimmy I have a copy of the instructions for the SBC-id and Power-id that have been translated, would you like them?

Troy
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Old 05-07-2002, 05:08 PM   #14
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Quote:
Originally posted by roybfr
Jimmy I have a copy of the instructions for the SBC-id and Power-id that have been translated, would you like them?

Troy
YES Please and Thank You!

Quote:
Also- Jimmy, sorry I missed your call... I was in a LONG meeting all morning, just got out... its 10:30am EST. Id been in there since 8am EST!!!
No problemo bro, I'll try again tomorrow
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Old 05-07-2002, 10:47 PM   #15
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I think I may have found the solution...

As soon as I turned off 'Auto' mode on Channel 1, Scramble worked fine... maybe none of the channels can be in 'auto'... who knows?

Anyhoo, thanks for the support guys and keep the good ideas coming. Any other tips or tricks would be greatly appreciated.

Jimmy
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Old 05-07-2002, 10:54 PM   #16
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I was talking to Mark at TurboXS to day about the SBC-id and he mentioned that the some of the features not working in auto mode, specifically gain.

Hey when in auto mode do you notice boost falling of at redline vs being in manual mode?

Troy
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Old 05-07-2002, 11:41 PM   #17
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Anyone who told you gain does NOT work in auto mode does not own an SBC-iD it completely changes the way boost comes on. Try it.

-Z
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Old 05-08-2002, 12:01 AM   #18
roybfr
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Well they have one at TurboXS for testing so Mark was not pulling it out of his butt. Maybe I had the feature name mixed up, but he stated that in auto mode the fuction that controls the wastegate speed is not adjustable, it only is in manual mode, I was assuming that this was the gain. He also noted that in auto the boost would hold till red line where as in manual it would not. This was on an aftermarket turbo and not the stock one.

Troy
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Old 05-08-2002, 01:24 AM   #19
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The gain function definitely changes the way the boost controller works, even in Auto.... It is particularly noticeable in fact, even in a 1-2 setting increment.

As far as holding boost to redline, I can't come up with a single reason why it would do it in Auto vs Manual. The only real difference is that the SBC-iD attempts to apply a little bit of logic and adjust for things like temperature and atmospheric pressure and maintain a pressure level rather than a duty cycle. I can't ever remember which is which but I believe this is the difference between an open loop and closed loop controller.

One operates at a duty cycle and doesn't care what the pressure is (I believe this is closed loop) - The other adjusts the duty cycle of the controller based upon a sensor reading (in this case manifold pressure - I believe this is open loop).

All I know is that my wimpy stock turbo won't hold more than 13 psi to redline..... It will peak at 16-18psi pretty easily in the middle of the RPM ranges, but after that it just can't maintain the pressure necessary.

Peace - Z
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