Well, you guys are sitting here trying to tell me what's what. I just wanted someone with some technical info about whether you can hook up an damn cord to the obd2 port and tune it on a dyno.
And to the guy who says he set up a 6.94 car. you don't know what you're talking about. The pcm on the trans am does need to be tuned when you change the cam from a stock 202/208 duration to a cam with 224/230 duration with more lift, the ecu has to be retuned to add more fuel on the top end as well as increase the rev limiter because power is made about 1000rpm higher. So regardless of turbo or not, when you install a way bigger cam, retuning is required otherwise it's a pointless mod. And plenty of guys supercharge or turbocharge their camaro's on stock pcm's. So, comparing na to turbo isn't that much different. I'm just asking about the ecu being able to be custom tuned in car with a laptop.
All I was saying is guys at ls1tech fab up their own stuff and tune things on their own, where as the vw world is a lot more materialistic, which makes sense because vw's are about style and not speed.
Look, I don't expect to even do much if anything to my car, especially since it's a tiptronic and is slow as balls, but it was just a question out of curiosity.
The passat is a nice clean car, but the whole idea of chips is just annoying to me, what if someone wanted to put on an oddball sized turbo or a really big turbo that the pre-programmed chips wouldn't work right with? So, the only people who could dyno tune the car would be APR, or GIAC right? the companies that actually make the chip programs.
I have no intentions of ever making my passat fast, but this is just all hypothetical. I sold my trans am for a reason, that was to go slow, which is why I picked the passat.
As T said, you can do just that if you want to, however with a stock turbo and an automatic transmission it is not very cost effective. People do fab up their own stuff here, too. Just as with an ls1, speed costs money and the question is how fast do you want to go. With the Passat, you're starting with a much slower car. You are correct when you postulate that if you put a turbo the size of your head from some Mitsubushi earth moving equipment along with 147.458 #/hour injectors on your 1.8 turbo engine that you'll need an engine control system that can be custom tuned for the hardware. At that point, you have a lot of choices, you can ask someone to tune it for you "custom" and keep the stock ECU (just like the GM ones), go with 034 motorsports system, Motec, Accel DFI, Big Stuff, the list goes on and on.
But the question you need to answer is what do I want out of this? What do I expect the outcome of spending my hard earned cash on my car to be?
The answers you've received have been that a chip is cost effective, and that you can do what you've proposed and tune on a chassis dyno, but there is no software that you can download that will let you get really far into your ECU and do a full tune. Not really too much of a market for it, so it is not all that cost effective for you.
It is unclear what you mean by "materialistic" -- to quote Indigo Montoya, I don't think that word means what you think it means. The Passat is a family sedan, seats 5 comfortably, does not come with a big screaming chicken painted on the hood, etc. The VW world is different and the emphasis is on different things, however the substance is still the same.
By the way, when changing the cam you don't really need to change the fueling unless the air/fuel ratio is off. You may need to change slightly when N/A when you change the heads, but you do need to change the injector timing when you open the intake valves earlier. You don't want to inject raw fuel into the cylinder (at least on PFI engines) because it makes them idle like crap. But you'll always make best power N/A around 13:1 plus or minus a little bit (mine liked 13.1:1, some like 12.5:1), and if your MAF is properly calibrated you shouldn't need to change anything. But the engine wants what it wants, it doesn't care what you want.
