ECM upgrade (1227730) for stock 2.8 (Page 77/107)
3.6lvvt6spdgt SEP 24, 12:50 AM
ok so i was goofing around on the internet and i found this site called http://www.code59.org/ its a tunning site for the GMC syclone and $58 code running vehicals.
hey darth the 59code is a modified $58 code that makes it easyer to tune i was wondering if this would be better for my 3.4l turbo? check it out.
americasfuture2k SEP 24, 12:20 PM
oh wow, and maybe that could help tune my engine too! god that would be so sweet.

[This message has been edited by americasfuture2k (edited 09-24-2008).]

Darth Fiero SEP 24, 03:24 PM

quote
Originally posted by 3.6lvvt6spdgt:

ok so i was goofing around on the internet and i found this site called http://www.code59.org/ its a tunning site for the GMC syclone and $58 code running vehicals.
hey darth the 59code is a modified $58 code that makes it easyer to tune i was wondering if this would be better for my 3.4l turbo? check it out.




I just recently discovered the existance of the code59 programming and have been doing some research on it. On the surface it looks like somebody took the $58 code mask (GMC Syclone/Typhoon) programming and converted it to work with a 3-bar map sensor so they could run more boost. They also set it up to work directly with a wideband O2 sensor (if needed) as well as disabled a lot of the factory tables in the $58 programming (which they say can be re-activated if you wish).

Basically to get down to the brass tacks here, the code59 programming would be a good choice for anyone doing one or more of the following:

-Needs to run more boost than 15psi and wants to have the ability to change fuel/spark above 15psi (although you could safely run 20psi of boost with a 2-bar program if you tuned it right)
-Wants to have the ability to hook the WideBand O2 sensor directly up to the ECM.
-Wants to do their OWN tuning.

I have not worked with the code59 programming on any vehicle I've had here at the shop yet. So I am reluctant to do ANY mail order tunes for anyone running this code just because there is bound to be quite a bit of tuning work involved in just getting it running right (or at least good enough to drive). Therefore if you want to run the code59 programming you will either need to bring me your car so I can tune it in person or you will need to get all the hardware/software so you can do the tuning yourself.
americasfuture2k SEP 24, 03:28 PM
hmm, so looks like its a no go for me. oh well, no loss.

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1987 Fiero GT built by my brother, merlot566jka, 3500 LX9 from 06 Malibu, WOT-TECH.com 1280 grind stage 3 cam, LS6 valve springs, 1227730 ECM conversion, Darrel Morse solid aluminum cradle mounts, Truleo headers modified to fit the 3500, 36# inectors, 70mm 4.3 throttle body adapted to 3500 intake, ported heads, upper and lower intakes, lightly polished, tcemotorsports.com crank trigger wheel, CenterForce dual friction clutch, Flowtech Afterburner muffler, 2.5" piping, cat deleted, EGR deleted, SinisterPerformance tuning, C6 Corvette exhaust tips. projected to be 35 MPG with a guesstimate of 250 hp at the motor

Joseph Upson SEP 24, 06:38 PM

quote
Originally posted by 3.6lvvt6spdgt:

ok so i was goofing around on the internet and i found this site called http://www.code59.org/ its a tunning site for the GMC syclone and $58 code running vehicals.
hey darth the 59code is a modified $58 code that makes it easyer to tune i was wondering if this would be better for my 3.4l turbo? check it out.




I've mentioned this code a few times previously, the 58 code for a 3 bar MAP sensor has been around for a number of years now. It has been modified further to run DIS ignition systems and work in the Tunerpro software, it also appears to be a more cooperative code than the Turbo Grand Prix 8F code, having several examples from members using it posted for download with various different injector sizes.

Unless someone has modified it further, the TGP 8F code will not allow you to reach 15 psi before it kills the engine and depending on what software you use you may not see much more than 10 psi. More importantly to be most effective you must be able to adjust timing for the full range of boost you intend to run. This is why I plan to switch from 8F to Code59 along with the intent to run more than 15 psi. The individuals using it have had great success with it and have posted their tunes for downloading.

The ability to use wide band O2 sensors is a plus and there are other functions such as water/meth injection control currently attempting to be worked into the code as well.
87_special SEP 24, 07:34 PM
My question seems to have been overlooked since it was on the bottom of page 19. So I will ask agian.


quote
Originally posted by 87_special:

Hey Darth,

I recently did the 7730 ecm swap with my 3100/4t60E (manually shifted) swap. I spliced in the correct connector and changed the vss road speed constant in the chip(24000ppm) so the ecm reads the correct speed. My problem is that the speedometer is way off. At about 20mph the speedo is pegged. Do you have any idea to fix this problem so my speedo works accuately?

Do I need this "Speedometer signal convertor" from FieroAddiction? http://www.fieroaddiction.c...ath=2&products_id=12

Thanks,
Joseph



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1987 Fiero SE/Fastback - 3100HO (Ported LIM, Ported Heads, Competion Valve Job, LS6 Springs, 3500 UIM, LX5 65mm TB) / 4t60e full manual / ZZP shift kit / 7730 ecm Emulated w/Ostrich - Soon to be bottle fed!

Darth Fiero SEP 24, 07:41 PM

quote
Originally posted by 87_special:

My question seems to have been overlooked since it was on the bottom of page 19. So I will ask agian.

I recently did the 7730 ecm swap with my 3100/4t60E (manually shifted) swap. I spliced in the correct connector and changed the vss road speed constant in the chip(24000ppm) so the ecm reads the correct speed. My problem is that the speedometer is way off. At about 20mph the speedo is pegged. Do you have any idea to fix this problem so my speedo works accuately?




Sorry, I must have missed this. What you need to do is make sure the Instrument Panel VSS Divisor constant is set to "128".
americasfuture2k SEP 25, 09:57 AM
here is a very interesting find that i came across in search for some engine bay wire.

http://www.americanhotrodso...ecm_harness_page.htm

2nd row down, on the right. pretty obvious....
87_special SEP 26, 07:24 PM

quote
Originally posted by Darth Fiero:


Sorry, I must have missed this. What you need to do is make sure the Instrument Panel VSS Divisor constant is set to "128".



I tried that already. That was the way I originally had it set up. I actually tried many different #s. It didnt make any difference if I put 0 or 9000. I don't know what to do. Do you think I need that "speedo convertor" from FieroAddiction?

-Joseph
Darth Fiero SEP 27, 12:40 AM

quote
Originally posted by 87_special:


I tried that already. That was the way I originally had it set up. I actually tried many different #s. It didnt make any difference if I put 0 or 9000. I don't know what to do. Do you think I need that "speedo convertor" from FieroAddiction?

-Joseph



Ok well if you are running the Fiero speedo off the ECM then yes you need the Fiero speedo conversion circuit shown here: http://dtcc.cz28.com/fiero/fmods.htm