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Can i use a 2 step??

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Old Oct 20, 2004 | 01:28 PM
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Arrow Can i use a 2 step??

I have a 2001 ws6 and i wanted to know if i can use a 2 step on my car? Which one should i get? How does it work/what exactly does it do?? Any advise would be greatly appreciated.
Thanks Richard
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Old Oct 20, 2004 | 05:21 PM
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What is a 2 step??

Bill
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Old Oct 20, 2004 | 10:07 PM
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Default New 2 step code developed for all LS1 PCM's

Originally Posted by Bill Bowling
What is a 2 step??

Bill
A 2 step is a module that has 2 different RPM pills and is used in conjunction with appropriate coil pack modules and is triggered by a trans-brake solenoid in the auto transmission.

Operation goes like this at a drag strip.

Car is staged with trans-brake on which engages first and reverse gears at the same time. This stops the car from moving while the stall convertor is loaded up to rpm rev limiter of pill #1. On the release of the trans-brake the reverse gear is disengaged and at the same time pill #2 is now the new rev limiter which would normally be set at your usual highest RPM point.

Last week we finalized new code for a 2 step operation within the LS1 PCM.
No 2 step module and coil packs required as the standard PCM does it all by its self.
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Old Oct 21, 2004 | 02:29 PM
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so this means i can use one?? who makes them and what one should i get??
Thanks Richard
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Old Oct 21, 2004 | 02:38 PM
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If you don't know what it does, why do you want or think you need one???? Not trying to flame, just curious.

BTW, Harlan is the only one that makes a LS1 compatible 2-step. www.harlan-engineering.com
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Old Oct 21, 2004 | 02:41 PM
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Originally Posted by Delphi
Last week we finalized new code for a 2 step operation within the LS1 PCM.
No 2 step module and coil packs required as the standard PCM does it all by its self.

Delphi.....how do you plan to trigger it and turn it off???? I assume the PCM sees the factory clutch switch to turn it off, but I like to know how you're going to activate it.
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Old Oct 21, 2004 | 03:28 PM
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That's a good question. Also how are you incorporating this into the PCM? Can it be done with HP tuners? I don't suppose you work for Delphi do you?
So is Delphi getting in the performance aftermarket ring now?
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Old Oct 21, 2004 | 03:35 PM
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Originally Posted by Bads02Z28
Can it be done with HP tuners?
there are a number of threads on our forum about this, but the short answer is "coming soon + more, more, more"
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Old Oct 21, 2004 | 04:45 PM
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well let us know when it is available
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Old Oct 21, 2004 | 05:24 PM
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Originally Posted by 1fastWS6
Delphi.....how do you plan to trigger it and turn it off???? I assume the PCM sees the factory clutch switch to turn it off, but I like to know how you're going to activate it.
The Delphi PCM has many unused inputs/outputs that can be used providing the code is changed to activate them. A single wire from one of these unused inputs to the trans-brake solenoid is all thats needed to trigger the 2 step code within the PCM. This is just one more feature that "RTLS1" can give you.
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Old Oct 21, 2004 | 06:01 PM
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Originally Posted by Bads02Z28
That's a good question. Also how are you incorporating this into the PCM? Can it be done with HP tuners? I don't suppose you work for Delphi do you?
So is Delphi getting in the performance aftermarket ring now?
Delphi is my Nick name on many forums. Dicks Electronics is my business name. I don't work for Delphi. We have been specializing in GM ECM/PCM performance tuning and developing scan tools for 16 years. Many see us as leaders with regards understanding the internal workings of the Delphi PCM. The 2 step code is another first for us.
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Old Oct 21, 2004 | 06:58 PM
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but your 2 step requires a seperate input?

i was hoping it would be like the 99+ fords where you don't need anything but the tune

Ryan
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Old Oct 26, 2004 | 12:26 PM
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Default 2 step

Ok here is a question with harlens 2 step isnt it cutting out spark so you are sending raw fuel thru the exhaust in to the cats. Which in no time will damage the cats. For guys like myself without cats this would be ok. Still doesnt seem to be the best way to go. For a car with cats sounds like problems to me. Scott
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Old Oct 26, 2004 | 04:32 PM
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Do they work with 4l60E's? I didn't think that a trans break was available for the 4l60e's.
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Old Oct 26, 2004 | 04:32 PM
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Originally Posted by smeshey
Ok here is a question with harlens 2 step isnt it cutting out spark so you are sending raw fuel thru the exhaust in to the cats. Which in no time will damage the cats. For guys like myself without cats this would be ok. Still doesnt seem to be the best way to go. For a car with cats sounds like problems to me. Scott
It is for this reason that we cut fuel on our RTLS1 2 step PCM.
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Old Oct 26, 2004 | 04:42 PM
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Originally Posted by smeshey
Ok here is a question with harlens 2 step isnt it cutting out spark so you are sending raw fuel thru the exhaust in to the cats. Which in no time will damage the cats. For guys like myself without cats this would be ok. Still doesnt seem to be the best way to go. For a car with cats sounds like problems to me. Scott
That's why I explicitly say DO NOT USE WITH CATS right in the instructions.

Spark drop is the way most if not all of the currently available options do it.

IMO, if you start messing with fuel and don't shut the injector off completely or at the right time you lean that cylinder out real quick. I'd rather have a weak spark from short dwell than a lean hole.

Not to mention even injector shutoff can damage CAT's, unburt air does neat things to brick temps in the catalyst.

In any case, a 2 step is a race application piece.

carry on
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Old Dec 17, 2004 | 04:03 PM
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Yes...it's an old thread, I know. I really want one of these since I've got a stall on the way now. I don't have cats, as you can see in my sig. Can I use this on the stock 4l60e? Can I just use the foot brake instead of a transbrake?

I'm guessing, stall, tranny cooler, 2 step, and DR's....will that be a safe set up for a daily driver? Does the 2 step have to be engaged and then shut off?

Thanks.
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