I have a hypertech prom and I have a question. How are you using the hypertech prom when you are burning chips. Im a little confused. Do you only have to use piggyback carrier with a new chip?? I ask because I have a Hypertech for my year but not my engine size, how does this affect things. the reason I ask is because there are to proms on the hypertech chip. Does the computer only see the piggyback??? If you dont mind could you explain in detail how you used your chip? By the way, your picture of the chip didnt work on your article about programming.

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355 10:1 , AFR 190 heads, LT4 HOT cam w/ 1.6 roller rockers, complete Superram intake, 58mm BBK TB, 24# injectors, screens out of MAF, MAT relocated, March underdrive pulleys, Streetdampner, Crane HI-6 ignition, 160 thermostat, K&Ns, TES headers(Jet hot coated), Mufflex 4' cat back, B&M shift Kit, 2500 converter, and 3.27s.

 

As mentioned in the article...

With a stock MemCal (not the chip ... the MemCal) there are two ways to program it. One is to desolder the chip from the carrier and solder a ZIF socket in its place. The other method is to create an adapter to program the PROM while it still exists in the carrier. Well, programming the PROM while it still exists in the carrier is no big deal except for the fact that if you want multiple PROMs then you need multiple carriers. That can be very expensive since GM wants $45 a pop (and that is at 5% over list). Plus - if you want to burn the chip while it is still in the carrier then erasing the chip while it is still in the carrier is annoying due to the fact that the whole carrier cannot be placed in the UV eraser. Ok - so we have established that this method is both expensive and annoying. The other method of desoldering the existing PROM and soldering a ZIF in its place can be both challenging for the individual who needs to do the soldering and also troublesome in a small respect since the carrier, once placed in the ECM, often doesn't leave room to put the ECM cover back on (not really a big deal though).

On the other hand you can do what hypertech did. Namely - all that we are concerned about is the calibration ... the EPROM. However, the MemCal contains other information such as the limp home chips and possibly the ESC filter. So, we need a way to allow us to use the part of our existing MemCal that contains those features while bypassing its EPROM to allow us to use our own EPROMs. The hypertech adapter module does that exact thing. When you buy a Hypertech 'Chip' for a car that contains a MemCal then what you get is not just a 'Chip'. They give you the 'Chip' attached to an adapter that allows you to plug your stock MemCal into it. Then, this adapter plugs into the ECM. It uses the calibration in the EPROM that the adapter came with while using the other information contained in your stock MemCal. Its actually a very simple device and I'll post a pic when I get a chance.

Anyhow - using the HyperTech adapter means that all you have to do is to pry out their EPROM and then drop in a new one. Since EPROMs are cheap you can have many EPROMs all with various calibrations. Simply pry out the EPROM in the adapter and then put in the new one. The stock MemCal is untouched.

Yes - I saw that the picture is no longer working. I guess I will have to get another one to put up.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels. Stock Wheels. No Weight Reduction.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Traxion... I have Jet chip and it has the same adapter thingie you're talking about with a ZIF socket under the EPROM. Just a FYI, I guess Jet's adapters are a very good candidate also

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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)

 

Good deal. Thanx for the input Blade!

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels. Stock Wheels. No Weight Reduction.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

i'm curious about what the hypertech/JET chip carriers look like. Does anybody have a pic i can look at?

I'll probably go with the solder-in-a-ZIF-socket approach, but I'd still like to see what the aftermarket guys do.