Can anybody document (dyno results) if the Hypertech ECM plug in module helps the performance of a 1996 LT1 w/automatic transmission? I bought and installed one about 2 years ago. Gave my best friend all he and his 2001 LS1 coupe wanted. It seems to raise the RPM and shift points and shifts harder and more positive. After having it installed for about 2 weeks, I scared myself two or three times and put the thing back in the box. I've been thinking about trying it again.

 

Bump

 

Good Morning.

I placed one in my '89 L98 as a prelude to other modifications and found the differences very positive.

The effect on the automatic is pronounced, and the changes in timing and fuel seem to add a great deal too.

I have no Dyno information, only "seat of the pants", but then that's where the fun is.

I would say it sharpens the performance. Less of the "Chevy" and more Corvette?

 

That's for your response, but the Tuning Module I am referring to would only be applical to a 1996 LT1 or LT4. I believe they were the only C4s with an ECM that did not use a plug in "chip". This thing goes in line and installs directly to the ECM.

 

Bump

 

92 and 93 were the only years of LT1's that used a PROM chip. 94-97 all use flashable memory, and you can flash the PCM through the diagnostic port.

As far as what you are talking about, I have no idea, but a real dyno tune is the only computer mods I would make that I expect to actually add power. YMMV.

 

I have a 96 LT1 with auto....although I do NOT have any dyno numbers, nor have I used the Hyper-tech, I can share with you the info that my tuner guy explained to me.

Hypertech (and others) can only program into a module what the laws allow...one of the parameters they cannot adjust (and wont) is the emissions/EPA adjustments built into stock ECM's, and their module(s) replicate exactly what the Gov. says is acceptable, hence the: "legal in all 50 States" badging.

Dyno numbers will change....why?..... because of advance in timing, shifting points-pressures, and amount of fuel introduction at certain RPM's. (those are just a couple)

A good dyno tune (as long as the tuner is knowledgeable) can cover, and adjust so many more parameters.
Your "seats of the pants" would become skid-marks, and instead of a module tuned for thousands of cars, a dyno-tuner will personalize to exactly your car and your driving habits.
As a matter of fact; my dyno-tuner will NOT tune a stock engine....he will be honest and tell a person that its not worth the $550....he will however; do dyno-runs and print out anything you need to know after *you* install an aftermarket module, hand-held, or flash your ECM.
$35 for each pull...a person could print out results "before and after" for $70 on the question you asked at this particular shop

I know this doesnt answer your question exactly...I just wanted to share with you that Hypertech can only adjust what is legal for them as a large manuf., where-as a dyno-tuner can adjust it all if he has the knowledge.

Sorry I dint have any numbers, but to be honest; the numbers would actually be different for each car...mileage, wear, previous driving habits and age of parts on engine, bolt-ons, ect... all affect dyno numbers.
And basically; you can line up 10 new engines and each one would have their own numbers...probably all within 10 or so HP....but all different.


Good Luck,
Jim

 

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