8192 Data
Thread Starter
Instructor
Joined: Mar 2010
Posts: 101
Likes: 0
From: Kissimmee Florida
The problem iam finding is some of the roms will not support 8192. The interface on ts says GM160 on the lower screen. Just seeing if its the Rom or maybe a problem with interface. I did find this quote below:
----------------------------------------------------------------------------------------------------
First of all, yes, the cable is fully capable of doing it. The 10k resistor (that we've talked about before) is what sends a TPI '165 ECM equipped Corvette in to 8192 baud mode.
However, 86 is a weird year. Early 86 Corvettes had a program in their chip which did *not* support 8192 baud - they were 160 only. Later 86 Corvettes have no problem running 8192. If his is an "early" 86, then it very likely will not work if he's still using the stock program - it's not the cable, it's the ECM program. The unfortunate thing is that I do not know the "cutoff point" between these two. This is just based on my experience with 86 Corvette owners (I've been through this before).
----------------------------------------------------------------------------------------------------
First of all, yes, the cable is fully capable of doing it. The 10k resistor (that we've talked about before) is what sends a TPI '165 ECM equipped Corvette in to 8192 baud mode.
However, 86 is a weird year. Early 86 Corvettes had a program in their chip which did *not* support 8192 baud - they were 160 only. Later 86 Corvettes have no problem running 8192. If his is an "early" 86, then it very likely will not work if he's still using the stock program - it's not the cable, it's the ECM program. The unfortunate thing is that I do not know the "cutoff point" between these two. This is just based on my experience with 86 Corvette owners (I've been through this before).
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
In my '86 code (BUA) there is a handshake test that the ECM does with the tester. It expects to see some hexadecimal bytes from the tester before it switches to 8192 mode. This is in addition to the 10K resistor.
My car was built in December 1985 and has cast iron heads, so it's an early '86.
BUA is auto trans and 3.07 gears. There are two versions, 9340 and 1728. I don't recall which one I've got. There are some variations in some of the parameters.
My car was built in December 1985 and has cast iron heads, so it's an early '86.
BUA is auto trans and 3.07 gears. There are two versions, 9340 and 1728. I don't recall which one I've got. There are some variations in some of the parameters.
Last edited by Cliff Harris; Jul 11, 2013 at 04:42 AM.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I use Diacom. I bought it in 2000. From what I've seen it's way overpriced compared to what's available now and Rinda has switched to boating applications. I don't think you can even buy Diacom for cars any more.
I don't recognize the 1228109 part number. Everybody I know of goes by the 3 or 4 character letter code (known as a BCC or "broadcast code"). It's visible through a hole in the MEMCAL cover on a silver label, like so:
I don't recognize the 1228109 part number. Everybody I know of goes by the 3 or 4 character letter code (known as a BCC or "broadcast code"). It's visible through a hole in the MEMCAL cover on a silver label, like so:
Team Owner
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
1228109 (1736AANM) was OE for '86 and one of very few that still used the 7 digit SPO part numbering format, most all of the '86 PROMS were of the 8 digit variety. That could be maybe significant when looking at the quoted reference you make mention of. Do I know for certain? Definitely not but I only see three 7 digit options and several of the 8 digit builds.
Cliff is correct of the two versions of the BUA and oddly maybe, one is a 7 digit reference and the other an 8 digit reference:
1227944 (1728BUA) that shows to be a coupe with no cylinder head material restrictions and the 3.07 gear.
16059335 (9340BUA) that shows to also be a coupe but with cast iron (KB2) and the 3.07 gear.
It might be an interesting check if he could to see which his actually is.
Cliff is correct of the two versions of the BUA and oddly maybe, one is a 7 digit reference and the other an 8 digit reference:
1227944 (1728BUA) that shows to be a coupe with no cylinder head material restrictions and the 3.07 gear.
16059335 (9340BUA) that shows to also be a coupe but with cast iron (KB2) and the 3.07 gear.
It might be an interesting check if he could to see which his actually is.
Last edited by WVZR-1; Jul 12, 2013 at 06:00 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Thread Starter
Instructor
Joined: Mar 2010
Posts: 101
Likes: 0
From: Kissimmee Florida
1228109 (1736AANM) was OE for '86 and one of very few that still used the 7 digit SPO part numbering format, most all of the '86 PROMS were of the 8 digit variety. That could be maybe significant when looking at the quoted reference you make mention of. Do I know for certain? Definitely not but I only see three 7 digit options and several of the 8 digit builds.
Cliff is correct of the two versions of the BUA and oddly maybe, one is a 7 digit reference and the other an 8 digit reference:
1227944 (1728BUA) that shows to be a coupe with no cylinder head material restrictions and the 3.07 gear.
16059335 (9340BUA) that shows to also be a coupe but with cast iron (KB2) and the 3.07 gear.
It might be an interesting check if he could to see which his actually is.
Cliff is correct of the two versions of the BUA and oddly maybe, one is a 7 digit reference and the other an 8 digit reference:
1227944 (1728BUA) that shows to be a coupe with no cylinder head material restrictions and the 3.07 gear.
16059335 (9340BUA) that shows to also be a coupe but with cast iron (KB2) and the 3.07 gear.
It might be an interesting check if he could to see which his actually is.
Is there a rom i should look for to put in ?
Thanks...
Team Owner
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
I would see if Cliff maybe has the 9340BUA which is an 8 digit SPO and if that's the case then I could give you a list of the 8 digit numbers with PROM ID's. I guess you only need a "core" that you can both program and data-log?
Thread Starter
Instructor
Joined: Mar 2010
Posts: 101
Likes: 0
From: Kissimmee Florida
I have a BUA bin file for 86 w/ alumi heads and 3.07 gear and auto. I will just need to burn a new chip. You think this one would work ?
I need to reset the fan temps anyway, and find were you delete the egr valve in the program.
I need to reset the fan temps anyway, and find were you delete the egr valve in the program.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I made a list of the EPROMs that I knew about a few years ago with part numbers. I think I got the information out of the part book. Near the bottom of the page:
http://home.earthlink.net/~cliff_har...Misc/misc.html
The only way I'll find out which numeric code I have would be to pull the ECM. Too many other projects going on right now. Next one: replace oil pan gasket, timing chain, timing chain cover, water pump and minor related parts. I suspect scraping the gaskets will take a week all by itself...
http://home.earthlink.net/~cliff_har...Misc/misc.html
The only way I'll find out which numeric code I have would be to pull the ECM. Too many other projects going on right now. Next one: replace oil pan gasket, timing chain, timing chain cover, water pump and minor related parts. I suspect scraping the gaskets will take a week all by itself...
Thread Starter
Instructor
Joined: Mar 2010
Posts: 101
Likes: 0
From: Kissimmee Florida
Thanks for your help I will burn this BUA chip when my burner comes in and give it a try. This should giveme the 8192 data and may solve my other problem with the MAF.
Will post on Scan and Tune and see if anyone knows which pram needs to be changed to delete the egr valve..
Donnie
Will post on Scan and Tune and see if anyone knows which pram needs to be changed to delete the egr valve..
Donnie