Datalogging and/or tuning your OBD1 Beretta

Want to know how to get more out of your Beretta? Or have a mod you would like to share?
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zcylex
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby zcylex » Wed Oct 23, 2013 11:05 am

Thanks for clearing that up.

And yeah the car is an 88 that never got the maf removed, the it started giving me pronlems and i replaced my original AMAL prom for an ARCL.

Ill start digging the TP site :)


1988 Beretta GT 2.8L V6 - Yeah my Retta is a year older than me! :)
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DOHC_tuner
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby DOHC_tuner » Thu Oct 24, 2013 3:26 pm

OBD1 tuning.....in my agenda.

What about widebands? No one mention that yet?

Ive used this wideband. Innovate MTX-L. I bought it on sell from Amazon. Very good product. Included datalogging software to view AFR in real time. I used it in conjuction with Hptuners. Wire tap it in so i can read it in my configuration file for a 2002 Chevy Cavalier Z24.

http://www.ebay.com/itm/Innovate-MTX-L-Digital-Wideband-WBO2-Air-Fuel-Ratio-AFR-Gauge-Kit-3844-/331046223571?pt=Motors_Car_Truck_Parts_Accessories&hash=item4d13e47ed3&vxp=mtr#ht_4338wt_1158



RobertISaar
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby RobertISaar » Thu Oct 24, 2013 3:37 pm

widebands are fairly standalone in nature.... most ECMs have an extra A/D channel open so that you can feed the signal into the ECM to have it spit out over the ALDL stream along with all of the other data.

if you patch enough code, you can actually remove the need for a narrowband sensor and do all fueling corrections via the wideband.

also: taking a guess due to there being about 5 of them that apply, but 88 2.8, try A057.

http://tunerpro.net/gmOBDI.htm

that would be ADS format, ADX requires one or two fixes.



DOHC_tuner
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby DOHC_tuner » Thu Oct 24, 2013 5:02 pm

Standalone in nature i agree on. But for a OBD1 1990 Quad 4 ECM.....patch enough code? Using what?

And please elaborate on those definitions.



RobertISaar
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby RobertISaar » Thu Oct 24, 2013 5:28 pm

1990 Q4 being a 1228707? that ECM is more or less a 1227730 with extra 2K of SRAM from the 16149396 and the second injector driver(and FMD) from the 1227749.

i think. been a while since i've seen one. if so, there is probably at least one open A/D channel that could be used for wideband AFR.

as for patching, i write all of my patches in hex, rather than in an assembler, seems to work better for me.

would you like expanded upon?



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zcylex
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Datalogging and/or tuning your OBD1 Beretta

Postby zcylex » Thu Oct 24, 2013 9:44 pm

Robert, if im not mistaken you made the tutorial i read about the arduino aldl cable, (just checked the link in op), if so can i get one of your aldl cables. I already ordered my arduino but would like to have a cable dedicated for my retta.

You do paypal? And shipping to 33122? Pm me or reply here thanks!


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1988 Beretta GT 2.8L V6 - Yeah my Retta is a year older than me! :)
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RobertISaar
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby RobertISaar » Thu Oct 24, 2013 10:47 pm

no arduino about it really.... just that the USB-TTL converter i use is marketed as such.

i've been selling them for $45/shipped with $5 of each cable going to the forum admins for a while. i wouldn't mind doing the same here.

that being said, i don't have any on-hand at the moment.



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zcylex
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby zcylex » Thu Oct 24, 2013 11:43 pm

well i am in need of one if you can get me one, how much time would i have to wait for it?


1988 Beretta GT 2.8L V6 - Yeah my Retta is a year older than me! :)
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RobertISaar
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Re: Datalogging and/or tuning your OBD1 Beretta

Postby RobertISaar » Fri Oct 25, 2013 11:51 am

at the moment, i really couldn't say, could be anywhere up to a month due to some supplier issues.




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