[1985] Where To Find A PROM/BCC [Forums - C4 Technical]

C4 Technical > [1985] Where To Find A PROM/BCC
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j3studio	[1985] Where To Find A PROM/BCC	#1
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Folks, [1985/A4/3.07/*very* stock] I have this PROM/BCC FTS 9529 0061 and I want this PROM/BCC CSZ 2633 7101 Any thoughts on where to find one?
	Posted on: 2011/5/3 19:59
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bogus	Re: [1985] Where To Find A PROM/BCC	#2
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	I would start with Vette2Vette and all the other salvage yards. I assume there is a reason why you want/need this prom?
	Posted on: 2011/5/3 20:26
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biggrizzly	Re: [1985] Where To Find A PROM/BCC	#3
2011 Memorial Day Car Show Winner! Chesapeake Beach, Maryland 4543 Posts Member since: 2006/4/23 0:00	Because he's gonna run 103 Octane Aviation Fuel! I know I'm close! LOL
	Posted on: 2011/5/3 20:29
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j3studio	Re: [1985] Where To Find A PROM/BCC	#4
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Quote: bogus wrote: I assume there is a reason why you want/need this prom? The second one is the last and best of the four 1985 A4 PROMs.
	Posted on: 2011/5/3 20:33
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j3studio	Re: [1985] Where To Find A PROM/BCC	#5
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Andy will laugh (or sigh), but do I have better odds just buying a mild aftermarket PROM than finding one of the late factory originals?
	Posted on: 2011/5/3 21:30
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bogus	Re: [1985] Where To Find A PROM/BCC	#6
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	You have another choice... getting your existing prom flashed with all updates. I would think that many of the tuners could do that, or even a chevy dealer, if they still have the stuff.
	Posted on: 2011/5/3 23:10
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j3studio	Re: [1985] Where To Find A PROM/BCC	#7
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Quote: bogus wrote: You have another choice... getting your existing prom flashed with all updates. I would think that many of the tuners could do that, or even a chevy dealer, if they still have the stuff. Andy, I'll admit to being somewhat clueless here, but I don't believe my PROM can be flashed - that's left for the newer cars.
	Posted on: 2011/5/4 14:39
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PeteK	Re: [1985] Where To Find A PROM/BCC	#8
Moderator Nanticoke, Pa 1311 Posts Member since: 2006/7/3 0:00	Quote: j3studio wrote: Quote: bogus wrote: You have another choice... getting your existing prom flashed with all updates. I would think that many of the tuners could do that, or even a chevy dealer, if they still have the stuff. Andy, I'll admit to being somewhat clueless here, but I don't believe my PROM can be flashed - that's left for the newer cars. It can. No big deal for a tuner that owns the bin file, and the correct equipment.
	Posted on: 2011/5/4 16:04
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bogus	Re: [1985] Where To Find A PROM/BCC	#9
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	It requires a cradle, a cable and software to talk to it. You may want to reach out to mseven. Also, what about using an even later revision tune for the L98? Say, 1991? Would that work?
	Posted on: 2011/5/4 16:19
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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j3studio	Re: [1985] Where To Find A PROM/BCC	#10
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Quote: bogus wrote: It requires a cradle, a cable and software to talk to it. You may want to reach out to mseven. Also, what about using an even later revision tune for the L98? Say, 1991? Would that work? See! Seven years and I *still* don't know anything. I don't think the later tune would work because my computer is dumb and (more importantly) slow.
	Posted on: 2011/5/4 16:35
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bogus	Re: [1985] Where To Find A PROM/BCC	#11
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	The 1985 computer vs the 1991 computer isn't all that different... except there isn't a cold injector, so the prom wouldn't know that. So 1987 is as late as I suspect you could go. The computers did change over the years, but it was internal and refinements, not structural revolutions. Don't beat yourself up, most people only care about a flash on the chip when they have installed a 383. Another person to reach out to would be TJ Wong.
	Posted on: 2011/5/4 16:40
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j3studio	Re: [1985] Where To Find A PROM/BCC	#12
Elite Guru Western Philadelphia Burbs 4247 Posts Member since: 2007/9/2 0:00	Quote: bogus wrote: The computers did change over the years, but it was internal and refinements, not structural revolutions. I get caught up on the raw 160 baud refresh rate of the 1985 and prior devices - does that not matter here? I sent mseven a PM.
	Posted on: 2011/5/4 16:51
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bogus	Re: [1985] Where To Find A PROM/BCC	#13
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	I honestly don't know how the baud rate effects the chip - my guess, not much. The baud rate is the speed of the ECU to an outside device, not the speed from the O2 sensor to the ECU. However, I defer to mseven on this.
	Posted on: 2011/5/4 19:04
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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mseven	Re: [1985] Where To Find A PROM/BCC	#14
Senior Guru Motor City Madhouse 247 Posts Member since: 2005/9/17 0:00	To me, the biggest issue with those is that everything (bin file, burner, eraser) is specific to that ecm. The bin file for those is very limited and there can be no substitutions with other files/years. I don't remember which one I have here and really wasn't aware of the one JR posted. Because I change almost all the values it hasn't been a concern. I can look around and see if I can find that file. If so copying it and burning a chip isn't that big a deal.
	Posted on: 2011/5/8 12:31

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bogus	Re: [1985] Where To Find A PROM/BCC	#15
Grand Imperial Pooh-Bah San Pedro, CA 20861 Posts Member since: 2005/9/7 0:00	Wow! I didn't realize the 85 was a one-year-wonder like that. I guess at the same time I didn't know it wasn't, so deferring to you was the right move regardless.
	Posted on: 2011/5/8 17:09
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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