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Old 05-03-2004, 02:54 PM   #1
ScoobyMods.com
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Default Open Loop Manager

This is a brand new product that we are introducing, from Vaus / SubieShack, with the discussion thread over
here
.

The Open Loop Manager 2, or OLM-2 for short, is the incredible new device for the WRX. This little device is tapped into +5v, ground, MAP, and TPS signals. It watches the MAP signal and once it sees a certain MAP value (boost), it simulates a WOT signal for the ECU. This does two things:

1) It immediately forces the ECU into open loop fueling.
2) If stock boost control is still being used, it makes the ECU shoot for full boost no matter what the actual TPS value is.


Note: For those who have not heard of the PTFB issue, read on. The stock ECU limits boost to ~7psi until you go past 63% throttle (TPS). It also stays in closed loop fueling (stoich a/f of 14.7:1) during this 7psi. When installing an MBC, you will be able to boost a lot more than 7psi at lower throttle positions. The problem is that during this situation, the ECU does not switch to open loop fueling (rich) no matter how much boost you are running as long as you are under 63% throttle. Doing this for an extended period of time causes high EGTs, detonation, and engine damage.

Price is $129.98 + shipping and available for purchase from our website . We have 5 in stock back in stock, so get yours while you can.

Kevin
Kastle's Korner
www.kastleskorner.com
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Last edited by ScoobyMods.com; 10-07-2004 at 02:47 AM.
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Old 05-03-2004, 10:54 PM   #2
testingtesting123
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Actually, the unit taps in to +5v, not +12v. If you tap in to +12v you will fry the microcontroller.
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Old 05-04-2004, 12:05 AM   #3
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quick question....i'm on my way out the door, but will read the other thread later....

If i have a UTEC and Profec B for boost, and get ptfb, can I use this or will the UTEC freak out cause it will constantly see 100% tps??
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Old 05-04-2004, 11:21 AM   #4
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Quote:
Originally posted by Kwyjibo
quick question....i'm on my way out the door, but will read the other thread later....

If i have a UTEC and Profec B for boost, and get ptfb, can I use this or will the UTEC freak out cause it will constantly see 100% tps??
If you have a UTEC you have no use for this device. Tune the UTEC to play nicely with the Profec B.
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Old 05-04-2004, 05:19 PM   #5
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Quote:
Originally posted by cdvma
If you have a UTEC you have no use for this device. Tune the UTEC to play nicely with the Profec B.
That is correct. This OLM is more for Manual Boost Controllers or people using the Factory Boost Controller.
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Old 05-04-2004, 05:21 PM   #6
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Quote:
Originally posted by testingtesting123
Actually, the unit taps in to +5v, not +12v. If you tap in to +12v you will fry the microcontroller.
thanks for the heads up on the typo.
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Old 05-04-2004, 05:26 PM   #7
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Actually, with a UTEC, you could use this device to run PTFB. As I understand it, when running a UTEC, you have to limit boost to wastegate spring pressure bellow the TPS crossover. If you ran the OLM with a UTEC, you could run ptfb all day long, since the OLM would be forcing the UTEC to take over apropriately above 7psi of boost. I'm not a UTEC guru, but I'm pretty sure I understand how it works. If my comments are not completely accurate, please provide the right info

Thanks
-- Ed
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Old 05-04-2004, 05:37 PM   #8
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Also, lets not forget the unichip crowd. The OLM is pretty much a must for anyone running a unichip (especially in conjunction with an MBC).

-- Ed
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Old 05-04-2004, 08:38 PM   #9
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Quote:
Originally posted by Vaus
Actually, with a UTEC, you could use this device to run PTFB. As I understand it, when running a UTEC, you have to limit boost to wastegate spring pressure bellow the TPS crossover. If you ran the OLM with a UTEC, you could run ptfb all day long, since the OLM would be forcing the UTEC to take over apropriately above 7psi of boost. I'm not a UTEC guru, but I'm pretty sure I understand how it works. If my comments are not completely accurate, please provide the right info

Thanks
-- Ed
He is running the Profec B to control boost, not the UTEC so he can get more than wastegate below the TPS.

Anyways, sorry for messing the thread Kastle.
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Old 05-04-2004, 08:48 PM   #10
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In that case, he could certainly use the OLM to manage his OL/CL crossover.

-- Ed
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Old 05-05-2004, 01:02 PM   #11
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This sounds like revised boostmonkey. Any affiliation with this refunked product?
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Old 05-05-2004, 01:26 PM   #12
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Quote:
Originally posted by lstepnio
This sounds like revised boostmonkey. Any affiliation with this refunked product?

Super duper NONE.
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Old 05-05-2004, 04:37 PM   #13
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This has nothing to do with the boost monkey at all. In the linked discussion thread, that point was raised and the explanation was provided. The boost monkey is a simple two-stage open loop boost controller that used the TPS sensor to switch to the high boost stage. This allowed one to run low boost (7psi) while bellow the 63% TPS crossover, and only run full boost past this point. A car with a boost monkey installed behaved similar to a stock car but with allowed adjustability of the high boost stage.

The OLM on the other hand, allowes you to run as much boost as you want/can at any throttle position using any boost control you like. It does this by converting the TPS triggered OL/CL system to a MAP triggered system. In other words, the OL/CL switchover is no longer based on TPS, but rather on boost, the way it should have been in the first place.

Thanks
-- Ed
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Old 05-05-2004, 06:26 PM   #14
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w/ open loop fueling in the UTEC this should not be needed by anyone w/ a utec.. if you think you need it you need to work on your tuning.

For people who wanted cheaply upgrade power in their WRX an MBC plus one of these should allow some great & still safe power gains for a very small price... I would say the 120 bucks is a small price to pay for safety.
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Old 05-05-2004, 07:03 PM   #15
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Agreed... with the new firmware that allows open loop fueling, the OLM is not necessary since the UTEC takes the OL/CL switchover into its own hands.

-- Ed
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Old 05-05-2004, 08:43 PM   #16
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Can this do anything for cars with an Ecutek reflash, or does the reflash already take care of this issue?
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Old 05-05-2004, 09:06 PM   #17
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If you want to run an MBC or EBC with a reflashed ECU, then the OLM will provide a nice level of safety. Although most reflashed ECU's allow more boost at partial throttle than stock, it is still possible to make much more boost with an MBC at the same throttle positions. As far as I know, ECU reflashes don't actually change the fact that TPS is used as the main trigger for the OL/CL switchover.

-- Ed
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Old 05-06-2004, 01:14 PM   #18
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Easy install? How does it tap into the MAP and TPS?

joe
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Old 05-06-2004, 03:56 PM   #19
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Install is very easy. You will only have to cut one wire (TPS). For MAP, +5, and GND, you'll use the provided tap-in connectors that require no cutting or stripping.

-- Ed
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Old 05-08-2004, 02:12 AM   #20
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Here are the installation instructions:
http://www.scoobymods.com/forums/showthread.php?t=3548

Thanks
-- Ed
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Old 05-08-2004, 03:31 AM   #21
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Thanks for the instructions. I have have a OLM on order.

Me having the auto tranny, wonder if there will be any problems with the TPS wire. I believe wire #7 from the ECU on connector B135 goes to the TPS connector #3 (manual trannys). With auto's, #7 wire will go to connector #3 TPS but will first tap into the auto TCM wire #3 on connector B54 AND wire 12 on connector B209. Whew. I'm referring to page AT-53 in the serivce manual. I can email you the diagram if you don't have it. Comments?

joe
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Old 05-08-2004, 04:43 AM   #22
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That's interesting.... I'd like to see the diagram for sure, but it sounds like you still need to tap the TPS wire at the ECU harness. Seems like the TPS signal goes from the sensor to the TCM to the ECU. You want to splice the wire so that only the ECU sees the simulated OLM signal. I'm not really sure what would happen if the TCM saw the modified signal... probably nothing good .

-- Ed
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Old 05-08-2004, 12:01 PM   #23
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pm'd you.

It should be OK if the auto TCM reads the TPS signal and does not go back to the ECU to read something there. I guess I'll be the first to test.

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Old 05-08-2004, 03:54 PM   #24
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I don't really see why it would ever go to the ECU after it already gets the TPS signal. IMO you'll be good do go, but just be careful the on the first drive to make sure. Do you by any chance have deltadash?

-- Ed
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Old 05-08-2004, 06:27 PM   #25
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Yes, have DD and will run some logs. I figure if it doesn't work I should get an immediate CEL.

thanks,
joe
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