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How do you build boost off the line with an m6?

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Old Dec 2, 2012 | 06:00 AM
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Default How do you build boost off the line with an m6?

So, like the title says. How do you M6 guys build boost to launch an m6 off the line?
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Old Dec 2, 2012 | 06:59 AM
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I use an MSD 2-step.
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Old Dec 2, 2012 | 07:24 AM
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You need a 2 step. There are a bunch of company's that make them. Lpe, MSD just do a lil searching.
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Old Dec 2, 2012 | 07:47 AM
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Gotcha. I had always thought they would only work for autos. Time to do some research and pick one out. Thanks guys.
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Old Dec 2, 2012 | 03:12 PM
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2 step and pull your timing waaaaaaaaaaaaaaaaay down and pour fuel to it.

I believe there is a guy here on the board testing a product that you program the amount of timing you want pulled and will do this for you while on the 2-step so you don't have to mess with your main timing table.
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Old Dec 3, 2012 | 12:20 AM
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like this
http://youtu.be/aUM3MICMiEc
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Old Dec 3, 2012 | 12:24 AM
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I use an n2mb 2 step, and pull timing via the first iat cell in hp tuners. I have the iat sensor set up on a continuously closed button.
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Old Dec 3, 2012 | 06:10 AM
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I used the msd but did no tuning what so ever for it and can build full boost with it set to 3500rpm within about 5-8 seconds.

This is on a rearmount stock ls1 with a 76/85mm t6 frame turbo.....I know others said it needs to be rich but mine reads in the 16.00 range while on the 2-step and spools pretty damn fast and holds it. No clue if its right or what kind of timing is going on there but it works.
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Old Dec 3, 2012 | 06:13 AM
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Originally Posted by ren987
I use an n2mb 2 step, and pull timing via the first iat cell in hp tuners. I have the iat sensor set up on a continuously closed button.
I really want to use one of those for its no lift shift feature.....care to pm me on how to rig one up to work on a ls1.....I have a 04 gto if that makes a difference.

Thanks
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Old Dec 3, 2012 | 08:23 AM
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I just went off their corvette based instructions, and pulled up a wiring diagram for my car off ls1tech. I would suggest the same. You also might have to buy a clutch switch to activcate it which shouldnt be a big deal.

If you try the timing trick using your IAT sensor the boost should come on alot quicker. I am using two ebay 76's and they spool the instant I am on the 2-step with the timing pulled.
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Old Dec 3, 2012 | 09:18 AM
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Originally Posted by 95bowtie
I used the msd but did no tuning what so ever for it and can build full boost with it set to 3500rpm within about 5-8 seconds.

This is on a rearmount stock ls1 with a 76/85mm t6 frame turbo.....I know others said it needs to be rich but mine reads in the 16.00 range while on the 2-step and spools pretty damn fast and holds it. No clue if its right or what kind of timing is going on there but it works.
The only reason it reads lean on the two step is from the 2 step dropping cylinders and unburnt O2 giving the wideband a false lean reading.

Remember it's an oxygen sensor not a fuel sensor.

Ren is the guy I was talking about, but I thought he was using an outside "box" to pull the timing and not the IAT cells.
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Old Dec 3, 2012 | 10:01 AM
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only thing I am using out side the box is a button that cuts signal to the iat, I am pulling the max 25* of advance that hp tuners allows

Matt I am in Ruston, if you ever pass through I will give you one of the buttons I use for the Timing pull and show you the set up.
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Old Dec 3, 2012 | 10:35 AM
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How much boost are yall seeing?
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Old Dec 3, 2012 | 10:39 AM
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12psi is the highest I have seen with the twins, I will have to change the wg springs to build any more boost I am afraid.
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Old Dec 3, 2012 | 11:07 AM
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If you can, richen up the ratio when on the 2 step. Your turbines will thank you. You are throwing an awful lot of energy into them.

I have this on my Audi. It retards up to 60* BTDC and I'm targeting an A/F of 10:1. I can make 28psi with a GT30R in about 1 second on a 2.3L engine @ 6000rpm.
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Old Dec 3, 2012 | 11:11 AM
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My set up is putting as much fuel as it is able to. It is around 99%duty cycle using 2 walbros. Plus the wideband o2's are not reading accuratley while the 2 step is activated.
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