For tuning reasons I'm going to retro fit the TPS on the ITB actuator as I am going to retain the VW ECU with a C2 chip and tune. For long hauls I'm going to run a short runner plenum with a MAF and filter that I can easily take off for shows.
So what I'm trying to figure out is, has anyone successfully put ITBs on an ABA and retained a factory ECU? TPS and MAF-less non MAP cars run like dog crap if at all, and no one wants that.
lol. Seeing as how C2 has had the monopoly on ABA chiptuning for years now...they'd know if they had ever made a custom chip to get it to run properly this way. If they say they've never done it, then I'm guessing it's never been done .
Without some custom tuning, it's pretty obvious that it would run like crap. I'm not trying to start a fight, but it's kinda obvious that nobody has done it before.
With a custom C2 tune, and NOT an over the counter chip, it could probably be done .
What I forgot to say is, the car will be driven to shows, thats where having a tps and maf come in handy, I wont have to worry about climate, temperature, and elevation changes effecting the air/fuel that was tuned at home. But once we are where the show is taking place i.e. Ocean City or Helen, the plenum can come off to show the pretty little trumpets, but I can still drive it.
to start with, those are 48s which are way too big for your setup. you could run 40s and be fine. absolutely no bigger than 45s
People are running weber 45s with no problem. I know 48s are really big, and the design is from a purpose built race car with more than your run of the mill build head, but I can choke them out when I build the plenum I suppose. I didn't really consider the size of the TBs, thanks!
if you think you need a MAF to run ITBs you're in way over your head. ITBs use a TPS, an IAT sensor, and a MAP sensor. once it's tuned it doesn't need to be re-tuned for elevation.
We shall see. I'll update this thread once I get moving on this. At the end of the day, preserving the stock managment I'm saving money. I've built an ABATurbo on stand alone before and the tuning cost more than what I paid for the motor and kit.
- Weber 45s are NOT true 45mm intakes. They have chokes in them that restrict the opening depending on need. The biggest chokes you can get are 42mm. Those ITBs are 48s...
- You PAID for standalone tuning?!
I posted here to find out if anyone is running a similar set up, not to be flammed because I have little knowledge of ITBs and tuning. I've been reading through this forum to learn more. I wasn't born with this knowledge, so I am learning. All you've been doing is giving me a hard way to go. This isn't a "What offsets work on my car" thread, I'm trying to make a unique build here.
I had never built or tuned a car before, I was in over my head with the turbo set up and stand alone. So what.
Mainly because you're trying to build something that will be the modern equivalent of a trailer queen. Having a car on ITBs, that can't actually run properly with the plenum removed, to look cool at shows is pretty silly. Unless you can do your own chip tuning, you're going to be spending MONTHS going back and forth with C2 trying to get a chip that works...IF it can be done. The money you'll spend on custom chipping will dwarf anything you've spent before.
Don't be fooled by low costs, because if C2 isn't going to charge you for complete custom re-writes of the code, and provide you with completely one-off chip that is not available on the market...then you're going to get ripped off. Seriously. To run a MAF-based car without the MAF, it will need to be programmed for Alpha-N operation, which substitutes the TPS in place of the MAF. This isn't something that just 'happens'. The main fuel calculations rely on the MAF for MANY things.
If they send you a chip from the current stable of offerings and say it will work, good luck.
IF you persevere with this, AND it works properly, then I'll lay down apology after apology for my attitude.