C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Question about laptops and LT1 edit

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Old Jun 3, 2003 | 09:53 PM
  #1  
MagikDraggin's Avatar
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Default Question about laptops and LT1 edit

I always read where one is to use a laptop in conjunction with LT1 Edit for modifying the ECU programming on a '96 vette.

I hope this doesn't sound too stupid of a question, but why a laptop (other than portability and convenience)? Would a standard tower system do the same thing if it were brought out and set up next to the Corvette?

Karl
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Old Jun 3, 2003 | 09:58 PM
  #2  
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Default Re: Question about laptops and LT1 edit (MagikDraggin)

i would imagine they use a laptop so when they use their data/tuning software (you gotta tune before you can make a new chip) they can get the data in real time while driving down the road and save it to view later. :thumbs:
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Old Jun 3, 2003 | 10:12 PM
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Default Re: Question about laptops and LT1 edit (MagikDraggin)

I always read where one is to use a laptop in conjunction with LT1 Edit for modifying the ECU programming on a '96 vette.

I hope this doesn't sound too stupid of a question, but why a laptop (other than portability and convenience)? Would a standard tower system do the same thing if it were brought out and set up next to the Corvette?

Karl
A tower would work fine for uploading a program when the car is in the garage, but that's about it.

After you've done the simple, non-tuning stuff (i.e. disable CAGS, lower fan temps, etc), you have to be able to go out and drive the car and log PCM data using a scanning package. I use AutoTap and OBD-2, but others are available. It'd take a loooooooong cable to do this using a tower PC ;)

Once part throttle is complete, then you tune for WOT using a wide band o2 sensor. This is usually done on a chassis dyno although you can buy / build your own wb for ~$250 - $500 depending on component quality and capability. Assuming you're tuning on a dyno, you make your runs, adjust a copy of your PCM flash file saved to the laptop, and then upload the new file to the PCM. You repeat this until you run out of time, money, or are happy with your tune. I suppose you could lug a tower to a dyno facility but it'd be a bit of a hassle.

Of course if you happen to have your own chassis dyno...this is all a moot point and a tower would work fine :D
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Old Jun 3, 2003 | 11:29 PM
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Default Re: Question about laptops and LT1 edit (96GS#007)

Yup! I knew it was going to be a stupid question. ;)

Just shows how much I DON'T know about what this sort of procedure consists of, and all the more reason to let someone who DOES know do it for me.

But if ya wanna know, ya gotta ask :lol: Thanks to you and Wheelman, for the excellent explanation(s).

Karl


[Modified by MagikDraggin, 10:31 PM 6/3/2003]
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Old Jun 3, 2003 | 11:50 PM
  #5  
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Default Re: Question about laptops and LT1 edit (MagikDraggin)

Yup! I knew it was going to be a stupid question. ;)
Stupid Question? Hardly! By asking, you just saved yourself the cost of buying LT1 Edit ($550 for the OBD II version) and then finding out it's not something you'd care to tackle.
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