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 Post subject: ITBs and megasquirt.
PostPosted: Thu Jun 26, 2014 6:50 pm 
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Ok I bought these today from a friend locally. :)

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They are GSXR1000 k2 itbs. I want to do something similar to this: http://www.redlinegti.com/forum/viewtop ... =7&t=48795
The ecu used on those itbs was an EMS stinger (expensive!) so a better alternative would be megasquirt.

Does anyone know if the megasquirt can run itbs withouth the MAF sensor?
Standalone is whole new terretory for me but I want to try and make it work.

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1991-GTi: JE 75mm 11:1 pistons,Ported head, Single UD pulley (OCC),Sandros chip,Aluminium flywheel,3tech 222/365 cams, Cultus headers,Cultus IM,50mm tb,Crane cams adjustable cam gears,Apex suspension, 4.39fd GB.
1989-GTi: 3Tech 210/340 Cams,Cultus IM, B&G springs, TD04L turbo, Apexi SAFC, Suzukird UD pulley, Circuitse7en dual boost controller, AEM wideband, AEM water / meth injection kit, HKS bov.
2001-Altezza AS200: Stock.-sold
2003-EVO7 GT-A
Aruba "one happy island".


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 Post subject: Re: ITBs and megasquirt.
PostPosted: Thu Jun 26, 2014 7:28 pm 
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I don't know crap about MS, but I know you can do that, :lol:

Google "speed density tuning"...

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 Post subject: Re: ITBs and megasquirt.
PostPosted: Thu Jun 26, 2014 7:48 pm 
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instant_shine wrote:
The ecu used on those itbs was an EMS stinger (expensive!) so a better alternative would be megasquirt.


You mean a cheaper alternative! definitely not better.

My Microtech runs predominantly in TPS mode with my quad setup.


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 Post subject: Re: ITBs and megasquirt.
PostPosted: Thu Jun 26, 2014 8:44 pm 
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Teeth wrote:
I don't know about MS, but I know you can do that, :lol:

Google "speed density tuning"...


I looked it up. I think the megasquirt can do it. It will rely on the intake air temperature (iat sensor) and air pressure (map sensor).
I also read something about alpha-n mode in megasquirt. In this mode the ecu wil rely on the iat, rpm and tps.

Thank you.

_________________
1991-GTi: JE 75mm 11:1 pistons,Ported head, Single UD pulley (OCC),Sandros chip,Aluminium flywheel,3tech 222/365 cams, Cultus headers,Cultus IM,50mm tb,Crane cams adjustable cam gears,Apex suspension, 4.39fd GB.
1989-GTi: 3Tech 210/340 Cams,Cultus IM, B&G springs, TD04L turbo, Apexi SAFC, Suzukird UD pulley, Circuitse7en dual boost controller, AEM wideband, AEM water / meth injection kit, HKS bov.
2001-Altezza AS200: Stock.-sold
2003-EVO7 GT-A
Aruba "one happy island".


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 Post subject: Re: ITBs and megasquirt.
PostPosted: Thu Jun 26, 2014 8:46 pm 
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Joined: Thu Apr 15, 2004 12:27 am
Posts: 3042
Location: Aruba
Dattman wrote:
instant_shine wrote:
The ecu used on those itbs was an EMS stinger (expensive!) so a better alternative would be megasquirt.


You mean a cheaper alternative! definitely not better.

My Microtech runs predominantly in TPS mode with my quad setup.


Yes. Sorry. I meant cheaper. 8)

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1991-GTi: JE 75mm 11:1 pistons,Ported head, Single UD pulley (OCC),Sandros chip,Aluminium flywheel,3tech 222/365 cams, Cultus headers,Cultus IM,50mm tb,Crane cams adjustable cam gears,Apex suspension, 4.39fd GB.
1989-GTi: 3Tech 210/340 Cams,Cultus IM, B&G springs, TD04L turbo, Apexi SAFC, Suzukird UD pulley, Circuitse7en dual boost controller, AEM wideband, AEM water / meth injection kit, HKS bov.
2001-Altezza AS200: Stock.-sold
2003-EVO7 GT-A
Aruba "one happy island".


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 Post subject: Re: ITBs and megasquirt.
PostPosted: Thu Feb 05, 2015 11:48 pm 
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Joined: Tue Aug 28, 2007 12:33 pm
Posts: 264
Location: yuma, AZ.
megasquirt runs pretty much anything.

usualy, MS uses a MAP sensor for fueling. i.e. speed density.
but for ITB's, the low end is hard to tune cus the funky vaccum signal, so MS support alpha N, throttle and RPM.

rumor has it, there is a flavor of MS that runs in alpha N's with input from the MAP at higher revs. </rumor>

with alhpa n's expect lots of tune time, the ECU is in stupid stupid mode. it just works off a table, so you dont want the 1.0 version of MS, the 8x8 table.
im building an alhpa n EFI ECU, and im going with a 11x16 table, well see how it turns out.

well, thats my .02

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