TR, '7148 and DIS....

[Six_Shooter]

I have a friend's 1986 Turbo Regal in my possesion, in which I am supposed to be tuning it, I say "supposed to be", because I don't seem to be making much progress, I make little changes and large ones, and nothing seems to change, at least not for the better. I'm also not able to wrap my head around this MAF stuff. It's supposed to be straight forward and easy, but the way the def files are set up, I don't see any correlation between what the ALDL is spitting out and what I see in the xdf to be able to effectivly tune this car. Also the 160 baud datalogging is making me want to poke my eye out with a dull spatula, it would be less painful.

So this brings me to my delema...

I am thinking about removing the '7148 ECM, and installing a '7749 and running either $58 or $59. The only issue I have right now though is, the ignition system.

From wiring diagrams electrically it looks to be the same as the conventional GM HEI ignition module, with the addition of the cam sensor, which I would think the ECM would only use this for the sequential injection, which would be lost in this change over. Cam sensor would still need to be retained for the ignition control, from what I can see.
The other thing I'm not sure about is the timing offset. The DIS module that I have in my Datsun has a 60* timing offset, where the bin file needs to add an additional 60* of timing to the signal to get the spark event to happen at the correct time, as compared to when used with a dizzy.

What I need to know is, what are the signals like from the Turbo Regal/Grand National/Turbo Trans Am DIS ignition module, and what sort of offset there is, if any.

[delcowizzid]

MAF is horrible to tune isnt it LOL.they should be running 90 degree dfi like the commodore v6's here use .we run 70 degree referance angle in our tunes.

[GONZO]

Surely you could use a 165 or perhaps someone could organise a "808" for you!

[Six_Shooter]

I would be looking to get AWAY from MAF. I would also be using '7749, since I know the files I would be using with it.

I think I might just bite the bullet, and make an adaptor harness, to test with.

[Jayme]

I would be looking to get AWAY from MAF.

not sure I understand your comment... 165 and 808 are both MAP so the suggestion fits the criteria

[Six_Shooter]

'165 is MAF, I know nothing of the '808, other than it exists, and is an Australian ECM.

'7749 (Possibly '7730, dependant on injector impedance) with $58/$59 fits the bill better than the '165 or any other ECM will at this point. I just need to know if the DIS to ECM signals are the same as what the '7749 would be looking for.

[VL400]

The '165 can be either MAP or MAF depending on the software used - it has inputs for both options. In Oz the '808 is a '165 minus the 8192baud ALDL chip - the '808 uses software that is MAP based. The later Oz ECM '3082 is also running MAP based software and is pretty much idententical to the '165.

The thirdgen.org forum may get more hits on whether or not the '7749 would work with the DIS, its not available in Oz and most users here wouldnt be too familar with it. I know of a few people running code59 but not many.

[Jayme]

so a 165 wired up like an OZ 808 + $12P and 2 bar map sensor and youve got an ecm thats is known to work with DIS and software with all the bells and whistles (1 2 or 3 bar map options, high res VE, soft touch rev limiter, flexible outputs etc)

[Six_Shooter]

*Sigh*

The '165 in stock form, uses a MAF, and is not what I want to use. I have seen mention of using '808 code in the '165 to use MAP, but this is more experimentaition and even farther from familar teritory than i want to be, right now.

I have use the '7749, with code $59, with DIS, but not the TR/GN/TTA DIS. I used the 60 degree V6 DIS system, attached to my 2.8L I6 in my Datsun 240Z, so I the ECM choice that I have will work with DIS, but not sure about this particular DIS system, since it is different than most other GM DIS systems. That is where the concern is.

As long as the signals from/to the TR/GN/TTA DIS is like the other DIS or even conventional HEI, than I am golden and the swap will be no problem and should have the car tuned better than it's ever been in just a few days.

I realize that this is primarily an Australian based membership here, but I am here and in Canada, so I know there must be and are others that are from North America too, that may have the information I need. I do frequent TGO, but so far, the only help I have had is RBob recomending I use his EBL. :facepalm:

The ECM options for this car are:
The stock '7148
OR
'7749/'7730 using $58/$59

No other ECMs are options right now.

I'll test the '165 with $12P on my test bench at a later date, when I have time to experiment.

[vn5000]

So if a 165 is same as 082 can you use a 165 maf bin to run a maf system on a 3082 -not that id want to ,just interested to know . Also does a 165 have the same pin allocation as a 808.