Ok, as a lot of you know, the eco s/c reflash isn't able to be read or edited with HP Tuners...BUT that doesn't mean you can't still have the eco s/c and use HP Tuners for more than just scanning. I've been doing it for about a month and a half nowHow? Completely different pcm reprogrammed from stock calibration.
YES, you can use HP Tuners with the GM ecotec supercharger
NO, there are no complicated rewiring or sensor swaps required
YES, it does run just fine
NO, lost resolution on the 2.5 bar fake is not really a problem
Ok, so here's what you need to do. First, obviously you need HP Tuners. Second, you'll need a wideband O2 sensor with a 5v output you can hook up to HPT. Third, a second ecu, like one from a junk/salvage yard. I found one for $50, if you need help finding one, just ask and I'm sure me or someone else can help you out. Some other recommended things are a spreadsheet program like Excel, a calculator (there's one on windows or on VCM scanner), time, and gas money. But don't worry, this is definetly doable, especially if you follow this guide (at least that's what i'm hoping haha).
Ok, so you've got the required supplies. First you need to temporarily swap the new pcm in place of the old, s/c reflashed one. The pcm is located conveniently on the passenger side of the engine bay near the firewall. There are 2 connections you will need to remove. This is done by simply pulling the gray piece that goes over each one back all the way. Then you can just pull/pry them off. You may need to pull the pcm away from the firewall so it has clearance to remove the back connector. Once the old one is out, just follow the reverse steps to put the new one in. Now use the VCM Editor to Read the stock tune (or alternatively just download one from the internet). You'll probably want to make sure you get the right type based on whether or not the car's got a manual or an automatic transmission. To read the tune, open the VCM Editor, hook up the HP Tuners cord, select Flash from the Editor, and then Read Entire. It should go through the progress then after you click Begin or something like that. After it's done make sure to save it. I would recommend saving 2 copies, one as an original, and one to tune on. After you've done this you can put the s/c reflashed pcm back in for now.
Brief Summary:
From here, you'll need to fake the 2.5 bar tune and change the injector constant, as well as turn off VATS (Vehicle Anti-Theft System). You won't necesserily have to start tuning fuel until you've already got a preliminary tune flashed to the pcm. Fuel tuning is something that will be done gradually (starting out at slow speeds and low rpms and working your way up eventually into full boost). Transmission shift points, rev limiters, various constants, etc. will also probably need to be changed, but you can do this as you find the need for it.
I tried to post all of this info on here, but it exceeded the maximum post size, so to find the detailed instructions check this link:
http://www.j-body.org/forums/read.ph...=10208&t=10208
If you have any questions, comments, concerns, etc. feel free to ask, and I'll see what I can do to help clear up anything.
Good luck!
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Originally Posted by silverbullet08
