I came across a hypertech chip today, which works on the 730 ECM. However, I know that the V6 used the 730 ECM as well. There was a sticker on the chip, but the numbers wore away a long time ago. Would anyone be able to tell me how to ID this thing? I'm looking to see if it's used on a V6 or V8. There are numbers printed underneath the worn sticker, which are as follows:

M27C256B
- 12F6
58800
9841E

and made in singapore


Would anyone be able to clue me in? I'm curious to see if it would work on my L98. Thanks

 

Those are just the actual eprom - means nothing. You need to know what's inside. So you need to read it and check the 8th byte to see what it is. The 8th byte is the "program id". If it's an "8D" in the 8th byte, then it's for a V8....but that's about all you can tell about it with out further investigation of the the code.

FWIW, Hypertech are complete crap and waste of money. The only good they serve is IF the eprom is removable: swap the eprom with a Flash Prom and start burnign your own eproms. Other than that, not much more. At least the price seems right (nothing).

 

And to add what Glenn said, an 8th byte of $88 is for a V6.

RBob.

 

Also, I recall a situation where a $6E Memcal had a 27C256, not a 27C128, on a Hypertech Memcal. You can really get a "pig in a poke" sometimes.

 

Do I need PROM burning software in order to read it? The eprom itself is removable. Thanks for the info.

 

Depends upon how brave you feel The best way would be to read it in a PROM burner. Another method would be to put it into your ECM and use Moates software to read it.

If it is an $8D mask that will work and you will have the bin. If it is another mask it may not work and may also fudge-up the ECMs SAM. If so a battery disconnect would be in order to reset the ECM and get things back to normal.

RBob.

 

I'd say throw it in the trash, but that would be doing the trash can a huge disservice...

 

Lol... not too fond of hypertechs here are we? I understand though, all that money for a 10 cent chip that can be picked up anywhere. I'm thinking about putting it in the L98 just to see what it does.

 

I have some interesting insight on the Hypertech chips. I bought 1 last year as a guinea pig for my prom burning setup. The prom just pops out and I pressed in a ZIF so now my chip changes take all but 3 seconds so for this alone it's worth it.

I wasn't really planning on using the hypertech prom because it was for a 160 thermostat which I don't want to run, so it just sat there until I was ready to burn chips.

Last year on my stock '89 L98 chip I ran 90 mph, this year on the ARAP bin I run 93+ mph(with a head wind so I might get as high as 94-95). I then decided to try for the hypertech chip and it showed about 1 MPH less then the ARAP (back to back runs) and yet still showed over 2 MPH more over stock.

Mind you the stock runs were done last year with a Catalytic and the ARAP vs. Hypertech was done on the same day this year with no Cat.

I will do some more comparisons this Saturday(weather permitting) to see the differences on the same day between ARAP, Hyper and Stock. It will be interesting to see the impact of these differenct bins on my ETs

 

I'd keep it just for the bracket, if you don't have one yet. The chip itself, you can throw out, reuse or whatever.

Edit: to read the chip without actually plugging it into an ECM, you'd need a PROM burner. That way you can pull the data off of it and then erase it.

 

You can also plug in the hypertech and use Craig Moates software to do a dump through the ALDL!!!

 

I may have to try that too... my only problem is I am very illiterate with the PROM burning and such. I have the moates software, but no idea how to use it. I don't even have a cable to link up, but l'm just getting started on it.