BASSr

OK, sorry if this is a silly question but I am just getting into this and not sure here.

I have purchased my chip burner (waiting for it to be delivered), so I am getting other stuff together. I have several MEMCAL's and in selecting which one I am going to use to put the ZIF in, I was wondering if that decision should be made by what chip is in it to begin with?

Basically I have taken an '88 IROC 305 LB9, put L98 aluminium heads on it, ZZ4 cam, 21 lb injectors, with a 200R4 trans and 3.73:1 posi rear. Runs very well after rebuild. I just took it through local inpsection and failed for emissions. Might be the plugs (R44TS), but until I get the chip burner I am not going to touch anything else.

Issues are that I am running a Howell harness with EGR delete, chip now is ARZF, so in stock mode I have to disconnect the cable to the trans to get it to shift correctly until I get the chip modified for the axle ratio.

Anyway, what I was wondering is it noteworthy which MEMCAL I use for the one I am going to use to put the ZIF socket in for my test chips?

RBob

iTrader: (1)

It helps if you mention the ECM you are using. ARZF is for a '91 5.0 f-body, so it is the '7730 in use. For a MEMCAL, the limp mode varies according to the vehicle it was intended for. There is also a cylinder select in the NETRES circuits.

Note that ARZF is for a 5-speed stick trans. And should not be used on an automatic with a TCC lockup.

Also note that the cable from the TB to the transmission regulates line pressure in the trans. Driving the vehicle with it disconnected is the fastest way to melt the clutches.

The ECM has nothing to do with when the trans shifts.

I don't know if you've made any changes to the tune yet, but stock that chip is set up for 19 #/hr injectors. And will run rich until it hits closed loop and the BLM drops like a rock.

A lack of EGR will cause high NOX in emissions.

I don't recommended ZIF sockets for automotive use. They don't secure the chip well enough.

RBob.

BASSr

RBob,

First of all I want to thank you for your reply. Second, I stand corrected and apologize for my incorrect post earlier. The chip I have in the car now is a ABWN and has a manual writing on it as "87 F-Body 350". Not sure where I got this one but it seems to have worked for me to get the motor running after initial change over to TPI and rebuild.

Now what I also have is another MEMCAL that I got from Hypertech back in '95 for the change over I did in my '87 Mmote SS. Installed a 406 SBC w/'87 Corvette TPI MAF setup. That car had the 200R4 w/3.73:1 posi rear as well imaging this car now. That MEMCAL has a removal chip (not soldered) but I really do not want to modify or change that setup as I still have the motor and complete setup in case I want to use it in the future.

I am using a 7165 ECM in the car ('87 el Camino w/200R4 and 3.73:1 posi rear).

I also have several other MEMCAL's here that I can play with (ARAP/BUZM/AMAU) and would rather start my modifications with one of those just in case I make a boo-boo while de-soldering.

What I am wondering is if the limp home chips in any of these three (ARAP/BUZM/AMAU) setup for what I need now?

Still waiting for the chip burner. What editor do you use? I have downloaded the TunerCat but not started to play with it as of yet.

Your feedback would be greatly appreciated!

Bruce

RBob

iTrader: (1)

Between those three MEMCALs, ARAP is the easiest drop in. It is set up for an 8 cylinder.

As for limp mode, who knows. Once you stray from stock engine displacement, cam, and/or injectors, limp has limited functionality.

And please re-connect the TV cable from the trans back to the TB. Otherwise your next posts will be in the transmission/drivetrain section of TGO.

RBob.

anesthes

iTrader: (12)

Do you even need a memcal if you don't care about limp home and knock? Like, can you just adapt the prom to the pins on the '165 or '730 ?

I know the '730 has some esc circuitry in the memcal, but is it not just for knock sensor?


Everything I've ever built was so wild limp mode was more like push home mode anyhow. Things like knock retard and closed loop operation are becoming less and less appealing to me.

-- Joe

RBob

iTrader: (1)

Will need to set the cylinder select. Other then that, just the PROM.

RBob

anesthes

iTrader: (12)

So I imagine that is not as easy as just a jumper or something?

-- Joe

RBob

iTrader: (1)

For an 8 it is a jumper. For others it is two resistors.

RBob.

BASSr

I am using a 7165 ECM. The setup is pretty close to a stock configuration as this is part of my plan. I need this to run fairly mild and get as good gas mileage as I can. If I wanted high performance, then the 406 would have been the way to go and we would not be having this thread as I have a nice Hypertech chip that addresses all the setup issues.

I disconnected the ECM cable to the trans, not the TV. The ECM was sending the trans into lockup at about 35-40 MPH due to the difference in the rear axle ratios (has a 3.73, not 3.08/3.23 with the ABWN). With the ECM cable disconnected, it shifts at correct shift points, just does not go into lockup. No big deal until I get the chip corrected for the 3.73 rear ratio.

Limp mode is important to me since my setup is pretty close to stock configuration. Have all the stock sensors in place so I'll use the ABWN MEMCAL to assure that it can get this thing home in case!

RBob (and others, what editor(s) are you using? I would like to use the same one so when I run into issues programming the chip and need some feedback we are talking the same language when addressing the "how to" in the editor.

Also, what clean chips are you using? I got some SST 27SF512 DIP28 512Kbit Reburnable EPROM chips on their way instead of the 27C128's. WHat issues can I expect to run into with these other than them not being EEPROM's? Still don't an EPROM eraser, so new chip each time I make changes.

Let me know your thoughts.

Bruce

anesthes

iTrader: (12)

IF I remember correctly, a 700R4 only gets like 20% of the cooling flow when not in lockup. When the converter is locked, 100% of the flow goes through the cooler (or radiator, if you have it set up like stock).

Also, you won't be 'correcting the chip' for the 3.73 ratio. If you changed your gear ratio you need to change the gears in the speedo bullet/sender in the transmission. Even if you somehow managed to get the PPM calculation 'right', your speedometer in the dash will still be wrong because your car is wired to go into a 4-out buffer. The '165, as far as I know, has no speedo output (corrected). I believe the cruise control system is completely wired into the 4-out unlike a '730.


-- Joe

RBob

iTrader: (1)

ABWN will work. But limp will still be off as you increased the injector flow rate.

OK on the TCC lockup, not the TV cable. That is actually good to hear. You'd be surprised at how many disconnect the TV thinking that the 'detent' cable isn't required.

Once into burning the TCC lockup points can be set to where they work the best.

For an editor Tuner Pro and Tuner Cat are the ones most used here.

I don't use chips, but the SST 27SF512 is a flash chip. No need for an eraser. Get a Moates Burn 2 and the chips can be re-flashed in a few seconds.

Not sure which BIN you are planning to start with. But the '86 - '88 MYs use mask $32/$32b. While the '89 MY uses mask $6E. With the $6E mask having better features and generally is a better starting place.

ABWN being either $32 or $32b, and ARAP being $6E. Although ARAP is a y-body calibration. Too much SA , has VATS set, and the fan control need to be inverted. Also the cranking fuel should be changed.

With those changes ARAP is a decent starting point. And since you mentioned mileage, $6E has lean cruise mode.

RBob.

BASSr

RBob,

OK, got my burner last night and still need to setup it up and load software. That is first but some of your terminology has me a bit confused, so if you could go back to basic's and explain a bit that would help me out greatly. Sorry, but have not had much chance to complete the reading materials as I started new job this week and it is has been busier than I anticipated as they have me going over to Israel the week after next.

I D/L'd the ABWN BIN from the library here. What is the difference between $32, $32b, and $6E? Sorry but this is basic stuff and I am not up to speed.

I think I'll stay with the ABWN to start with and once I am successful geting some issues resolved, I'll try other BIN's. Does that seem like a conservative approach?

Bruce

BASSr

Joe,

Not using a 700R4. The drive train behind the motor is basically a stock '87 Monte SS. 200R4 trans with 3.73:1 gears in rear, so that has the speedo gear in the trans matched, and speedometer shows MPH correctly, or as correctly as it ever did. :-)

The motor is the LB9 out of an '88 IROC, and only things I have changed are the heads (larger intakes, now 1.94" opposed to stock 1.84", same 58cc chambers), ZZ4 cam, 21 lb injectors, and hooker headers to increase exhaust flow. Has all the same stock sensor points so I think the 7165 ECM is a good starting point with the stock ABWN BIN.

I am confused about what you say about the rear axle ratio not being able to be corrected in the BIN. When I have the ECM cable cable connected to the trans, it shifts early and goes into lockup way too early. That says to me that the ABWN chip in it now (unmodified) is expecting to see the stock '88 IROC 3.23:1 gears, so it shifts early and puts trans into lockup early. I am assumming that there is somewhere int the ABWN BIN I can change this?

Bruce

Lucid

iTrader: (4)

Are you talking about the TCC connector for the torque converter solenoid?

The lockup points in the BIN can be changed in the TCC settings. There are quite a few of them in the $6E mask (which is what you probably will want to go with to get more control over the lockup/unlock points).

The ECM does not control the shift points on the transmission though.

Look through the stickies and read up on the terminology.

odddoylerules

but back to using 27sf512 chips, any addressing issues or what not? been wondering myself if it'd be a straight up swap