I read a little bit somewhere in here about you doing some '8253 tuning on a Trofeo with a supercharged 3800. Is there some patch to run boost with that ECM or is a supercharger's input consistent enough that you can construct accurate VE tables that just go over 100%, set up so you just use the TB vacuum port as a vacuum source for the MAP input, and use a wideband to get the numbers on target. If you used something in the TB for a vacuum source that resembled what ported vacuum on a carb is, I suppose you would have to fill the tables backwards, so that the more vacuum there is, the higher the VE, and vise versa.

Please enlighten me on the strategy you use to make the '8253 compatible with going over atm. pressure.

Thanks

Kurt C. Kimmerly

 

The 8253, is MAF.
Now are you ready for the neat part?. It uses the same frequency range as the late model stuff. So you can use the 3, or 3.5 late model MAFs.

What are you planning on doing?.

 

oops, sorry stupid me, forgot about the MAF-ness of it. I was researching what its gonna take to put a TGP- based turbo setup on a 2000 3400 and into my 1990 AWD 6000.

When I saw the 8253 reference in a couple of your posts, I started thinking about how a pair of Sunbird 2.0 T2s would be neat under the hood of my daily driver LN3/440T4/'8253 Touring Sedan Olds. Not too serious about it, but it would make my daily commute more interesting.

Which brings me to a real question. As I understand it, the pinouts of a 727 NA V6 differ only slightly from the pinouts of a 727 TGP, and these are essentially the same as the ECM that's in my AWD right now (730), but in a prettier package.

If I were to take a complete and stock 3.1TGP memcal and plug it into my 730, is there work done already to show what all would need to change? I assume the injectors and most other things wouldn't even move, but I also assume that this electronic boost controller thing might take away from something else or require more pins. I tried searching already and what I found was that thing from Ludis's on what pins match up to what going between the ECMs, but I can't tell for what apps and such(V8/V6/Turbo/etc), and what's more, I am too stupid evidently, to even read the diagram, maybe it would be more obvious if I had both connectors sitting in front of me.

I imagine that this should involve maybe pulling 5 wires out of the ECM connector and repinning them, and maybe cutting the connector off the can purge and splicing it to instead run the boost controller or something, am I wrong?

Thanks

Kurt

 

The TGP code is really about as complex of code as you can stuff in a P4.
If your thinking about a 730, then I'd suggest using the syclone code (58). There is even 58 source code that's been public domained.

For a limited boost application, the 8253 wound up working pretty well. If your thinking of like more then 20 PSI then I's strongly suggest going with the 58 code.

 

Shouldn't the TGP code be more straightforward to implement on a stock 3.1 turbo than the $58? I thought the $58 was for distributor use. Even if I go this route using the Gen III V6 parts (2000 3400V6) It seems like the TGP code would still be worlds closer to start with.

I guess what I am looking for is something like documented on what pin serves what function when you run the TGP code in a 730. What I mean is if, for example, pin A18 is wastegate control on a '727 with the TGP code, what pin is it with the same mask used on a '730?

If I knew what pin everything became, and only a few changes were required, then I could use my stock ECM and wiring harness with the 90 TGP engine and peripherals as almost a plug and play drop in, which would suit me just fine.

I would just have to:
1) repin a little bit of the factory ECM connectors
2) run wire to the wastegate controller & anything else LG5 spec.
3) plug in a TGP memcal
(with some slight alteration of .bin to adjust the FDR and allow for the fact that there is no OD)

I'd then be ready to do AWD donuts, autocross, or enter in ClubRallies as a Group 5 car, provided I got a cage, tow hooks, extinguisher, and such.

Thanks

Kurt

 

I've been running the 58 code on my GN for a year now, so it seems like the 58 stuff will work on DIS.

If I knew what the pin changes were, I'd have mentioned them, if if I knew anyone that'd done that, I'd steered you that way.

Sometimes, there are no easy answers, and sometimes what looks to be easy with further investigation, isn't.

Maybe you ought to try looking for a hac of the GTP code, and then the 58, and compare them.

 

I see, gotcha. I woulda thought someone woulda done this by now, I s'pose its just a newbie assumption. I wonder if I can't figure it out by looking at the ECM schematics themselves, and finding where the equivalent drivers end up as far as where they pin out.

Thankya!

Kurt

 

OK I think I got it!!! I decided I was going to just sit there and stare at this
http://www.cruzers.com/~ludis/triplugecm.html
until I figured out what it was and why it was useful and why it was labeled for three different ECMs. I think I get it, it looked all shifted to me before, but I think the way it works is that the 727 pin is on the left, then comes details about what it is, and then what pin it is in the 730. Does that sound right to you based on the way it looks? For example, would you agree that:
727 pin = 730 pin
A1 = E3
A7 = E4 ... and so on?

I think I was getting screwed up by the fact that the stuff is laid out in two columns wide, with three ECMs worth of pins in each.

Kurt


Yayyyyyy!!! My brain actually works (I think) lol