First off, it's an 89 305 tpi MAF, 165 ecm. It came with a Hypertech chip when I bought it, but I wanted to do my own chip burning. For a few months, I went back and forth between my own burnt chips based on stock bins, and the Hypertech chip. The car seemed to act funny when it had a burnt chip in it, and it felt natural to have a Hypertech chip in it. This kinda put me off burning my own chips for a while, but now I'm getting back into it. I'd stick with the Hypertech chip, but I know I can get more performance out of experimenting with my own chips, especially when datalogging shows 1-4 degrees of KR all the way down the track on a hot day. I wanted to read the Hypertech chip, and copy that to a burned chip, that way I have the original Hypertech settings, but I can take a few degrees of timing out.

So here's the dilemma. I'm using an adapter from my Hypertech memcal to a Burn 2 chip programmer from Moates. Reading the chip and saving it to a file produces a wide variety of results. I either have 0's across the board for all my parameters, or they're all outrageous numbers. 89 degrees of base timing? Yeah right...I have similar results as in this thread:

http://tunerpro.net/forum/viewtopic....e12550c0ae6417

I tried what they mentioned about using the 27c128, but it still pulled odd numbers. Fuel cutout at 35 mph lol.

The writing on my Hypertech memcal is 27256-25, 8812HGB, and PRGM@12.5V. On the sticker that covers these up, it reads SN# 601 7804, HyperTech(C)'88, PT# 128 942.

Any ideas as to why I can't read my Hypertech chip? I'm about to go through different XDF files as suggested on the TP thread, but figured I might get some input from here in the meantime. Thanks everyone.

 

some of the hypertechs are messed up when you read them i'm not sure if its some sort of lock or bin stack. they used 27c256 as well as 27c128's . do the read as a 27c128 from 00000- 003fff. you can unsolder the uv eprom and solder in a sst 27sf512 and start with a anyc

 

I read it as 27c128 000000- 003fff, but it gave me incorrect values, although not as drastic as when I read it as 27c256. It's still not right though.

I have a Moates adapter with 27sf512 chips that I plan on putting in the ecm in place of the Hypertech chip, but I'd like to burn the original Hypertech chip settings onto one of the 27sf512 chips, and just modify it from that, instead of downloading a stock .bin and starting from scratch.

 

you read it correct. there is something goofy with some of the hypertechs. nothing special about the tune on it. I have a 128941 That I can do a read on too see if its jacked up and send it too you later today if you pm me with your email address.

 

PM sent.

Here is the .bin file that I read off the Hypertech chip, using 27c128.

 

file sent

 

yeh, thats jacked up. I have ran into that before on some of the hypertech's and am not sure why the read was correct. usually it is on ones that have a copy right sticker on them and mostly there 87 and 88 $32B stuff.

 

What is that .bin you sent me? Is that from my chip?

 

It was a memcal I read from a hypertech streetrunner memcal 128941http://www.summitracing.com/parts/HYP-128941/

 

So is this roughly what's currently on my Hypertech chip? I did a compare in TPRT to a stock .bin, and all it's changed is the spark advance tables, fan temps, and a few other parameters that aren't really worth mentioning.

If so, I'll just burn that .bin onto a 27SF512 chip, and tune from there.

Do I have the right train of thought?

 

yes sir, I would burn it and give it a try on the sst from chip start
00C000 -> 00FFFF

 

Thank you! I tried reading the chip I have with different xdf's ($32, $32B), but neither were any better than any of the other reads I did on it. You're right, something is goofy with it lol. I just wondered if it was something I was doing wrong. Aw well, I'll be using burnt chips from here on out. Thanks again, I appreciate it!

 

the definition is correct $6e at 00000008

 

I don't think it was you something goofy they did to protect there .bin

 

> The writing on my Hypertech memcal is 27256-25

This is the key, the 27256-25 means that it is a 256 kb chip, with a 250 nsec access time.

Read the chip as a 256 kb device, then save the top half by setting the buffer save for 0xC000 - 0XFFFF

Craig has how to set this up on his web site.

RBob.

 

This is the 27c256 I'm reading off of. Are you talking about editing the Addressing lines?

 

Yes, your buffer addressing is incorrect. Hit Craig's www.moates.net for more info.


RBob.