CONGRATS HOMIE! i'm really happy for you ..

 

sweet deal and the clanking could be the TB opening.When you turn the key on the TB opens a bit for idle then when you turn the key off the TB shuts completely.....

 

 

I started it and ran it for a good 5 minutes while I data logged, the thing is running like a kitten now. I'm updating the tune now, hopefully it doesn't smoke me out this time, I was running ungodly rich the first time.

 

yay your running....im charging my tuner as we speak...so i can tune for 14-16lbs.....cant go much more cuz of the 2 piece intake manifold....ill eventually upgrade...but 14-16 should be fun for now

 

What do u have internally to handle 14-16 lbs of boost?

 

everything...rods/pistons forged 8.9:1
valves...gm racing
well its a built engine...

 

nice should be a mean 2.2

 

vids? lol.......

 

Well, he's having issues with the MAF pipe I have. Apparently, 3" is way too big. He's got it tuned for 2.5", and when I go up to the 3, it's causing all sorts of issues. We're working on it. How am I supposed to get vids when I have no camera?

 

MAF should always be in a 3" pipe BTW

 

Always 1 thing after another wtf....this poor balt needs to run w/out problems

 

well...as i went to datalog yesterday...my mbc **** itself....so now im only doing 7lbs...o and the initial tune is super rich....lol....no worries...i ordered a better mbc...like the one i have on the saab...capable of 35psi....so i should get that tomorrow hopefully

 

Your manual boost controller.....failed? What the hell happened?


Well that sucks, you need to break in your engine a little more anyways. I wouldn't start beating on it til at least 1000 mi.

 

well i put 1400 miles into it already...lol....highway miles....talk about breaking it in fast...lol

 

The issue we're running into with the MAF pipe is this:

With the size pipe that is being run, the MAF frequency is so low, its off the bottom of the MAF scale in the ECM. There are two ways this could be worked around in the tune:

1. Scale the MAF tables down so the airflow calculations are correct. The problem here is there's no "resolution" so fueling might be non-precise at idle.

2. Switch to a hybrid SD/MAF fueling mode where we switch to MAF only after airflow is high enough to register in the MAF tables

There may end up being other problems since the MAF is used for more than just fueling. We're going into uncharted territory, either we'll be able to fix this in the tune or we'll have to switch to a smaller MAF tube.

 

hmm thats weird vince.. esp considering balts use 3" maf sections stock

do you think this has something to do with the crazy ass intake manifold?

 

same problem im having with the maf car idles fine with the tune but as soon as i step on the gas it shuts off ..

 

Could also be MAF proximity to the TB and/or alignment with the TB. I've asked Sentry for pictures of his setup. I'm working with mrsilent also, who has a 3" MAF tube and his car DOESN'T have this problem (MAF reports airflow "normally")

Big-Dave has exactly the same issue - MAF frequency is off the scale on the low end. Big-Dave could you send me pictures of your MAF, and MAF Pipe also?

 

hey i want to send u pictures too....lol....i have a thread as well if anyone wants to find me....look for 200f 2.2 turbo

 

I think we figured out the answer, but I ain't tellin. Haha, too stupid of me not to check this....

 

Now, wait a minute, lol... we all want to bask in your stupidity...

 

...and now i know what "this" looks like on a data log. haha

 

how far away from the TB should your MAF be? mines going to be in the 3" pipe too.. ugh not liking this!

doe sthis mean the tune i got vince is no good?

 

Doubt it, what's wrong with yours?