I have an 86 Iroc and I have just ordered the tunercat program(waiting on it to come in). I mailed them a check any body know how long it would take them to send the editor to me. That's besides the point. If I'm right the 86 tpi is an $32. Just wanting to learn.......what's the difference in a $32 and a $32b. And why change it over. Also how would you go about changing it over.
appreciate ya putting up with stupid questions......

------------------
Getty up my *** this ain't no damn pony ride!!!!
86 IROC 383tpi
The "bone stock" that rocks!

 

There isn't really any functional difference between the $32 and $32B masks. Just some tables and values are moved around. There is no reason to switch between the two.

Nick

 

There really isn't a great reason to switch to $32B. Are you sure that you mean $32B??? Most $32 and $32B users convert to $6E. The $6E calibration was only used on the F-Body in 1989 in the 165 ECM. The $6E calibration is the LAST calibration for the 165 that GM released. One of the important changes in the $6E is the deletion of the cold start injector. Cold Start fuel is supplied directly through the standard injectors. This allows you to get rid of the cold start injector which 'cleans up' the engine bay a tad bit and also allows you to eliminate another possible location for vacuum leaks, etc.

Don't switch to $32B ... switch to $6E and then just unplug the electrical connector from the cold start injector until you can either buy or fabricate a cold start injector plug kit. The cold start injector plug kit will allow you to completely remove the cold start injector as well as the line running from the rear of the driver's side fuel rail.

Converting to the $6E also allows you to run GM's ARAP BIN. The ARAP was the 'performance' BIN that GM used when supplying cars to magazines and such for testing purposes.

Tim

------------------

• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Traxion,

I must have missed the posting on the ARAP Bin. Was this a 1989 only BIN?

I had been looking for a BIN from the players motorsport series cars (pre-1LE days). These cars had a "special" chip in them that the racers had to leave a deposit on. I assume this was to keep things even amongs cars, but I also assume the chips were the hot ticket to have for the cars.

The ARAP sounds like a similar purpose.

I assume we have that BIN file around somewhere? Waht is the big difference over the $6E file? Calibration?

Mark.

 

Mark,

The ARAP bin is located on 'incoming' at the DIY-EFI ftp site...

ftp.diy-efi.org/incoming/arap.bin

Tim

------------------

• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

This is an interesting topic. If you switch your cal file to the $6E version, how does the ECM know to add more fuel at cold startup thru the 8 injectors? I would think that would be in the programming inside the ECM itself, not the values in the PROM.
Anyways, I took a look at TC's $6E cal parameter list, and there are quite a bit more constants and tables versus the $32 cal file. Is the removal of the cold start injector the only advantage of using this calibration? It appears to be an easy swap, since the ECM's, EPROMs and etc are the same as 86-88 cars. I expect that a newer cal file would have better programming than an older one, since newer is better!! (LOL)

Has anyone done this swap with good success?

------------------
Best ET 14.413 @95.57 without
pulling valve covers or manifolds.
Also with stock 2.77 rear end!!!

 

Mike,

Have you had a chance to review any of the HACs? ECMGuy's site (as referenced in my article) has a few 'HACs' that basically breakdown the entire code in the EPROM. Approximately half of the PROM code contains lookup tables, constants, and flags (these are the things that we change in TunerCat). The other half contains the MicroCode that utilizes these tables, constants, and flags. It is this MicroCode in the $6E that is really important. It differs dramatically from the $32 and $32B.

Tim

------------------

• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Mygawd! Just went to the /incoming directory for the first time. Talk about overwhelmed. Felt like a 6 year old, with a $1000 bill in his pocket, going into the candy store for the first time!

Thanx Trax!

Been thinkin about switching one of my cars(or maybe the truck) to 6E(that cold start mess has been more pain than pleasure). Now that I have the ARAP bin, that decision maybe be sped-up.

 

MikeT,

To answer your first question, there is a table labeled something like Open Loop %AFR Change Vs. Coolant Temp that adds more fuel at lower coolant temps while the ECM is in open loop. For engines with the cold start injector, the values were all the same, usually 1.56%. For the '89+ engines, they vary from 60-something% at -40 degrees F (or C, it's the same number) to around 10% at normal operating temperature.

One of the main benefits to using the $6E version is that the programs available to change the different tables and such (like TunerCat and GMEPro) have many more variables defined for the $6E vs. the $32 and $32B. I have switched to the $6E on my '87 IROC with no problems. I started with the ARAP bin, set all of the variables to match those from my custom '87 bin, then started changing things from there to suit my (and my engine's) needs. Other than that, I haven't seen anything in the hacks that is much different or better between these calibration versions...

------------------
Greg Westphal
'87 IROC 305TPI/A4

 

After looking at well over 500 bins., I have yet to see where GM took a step backwards in calibrations. It just the newer the better. There might be lil nonsense items, but overall, if your using a 1227165 then use the 6E, and the later the BBC the better.

 

Thanks for all of your replies. I did look at TC's list of tables for the $6E. I found 2 that said "crank fuel pulse width vs coolant temp" and "crank fuel pulse width multipier vs TPS". Would these tables give more fuel at cold startup? Makes sense to me.

I am seriously considering getting the TDF from TC for the $6E. It is only 20 bucks, and like Greg said, you can start with values from your original EPROM, and go from there.
I could always start by pulling the cold start injector connector, and seeing how she runs with the $6E, then get the plug kit after I am happy with it. Do they sell these cold start plug kits at GM?
This is good stuff!!!

 

Answered my own question ;-)

[This message has been edited by Desert86Roc (edited March 22, 2001).]

 

Desert, if you can't locate a 305 version, then you can always change the "cylinder volume" constant to make it work on a 305.

 

Answered my own question :-)

[This message has been edited by Desert86Roc (edited March 22, 2001).]