Boost issues- Can you help?

[MMGT1]

Hi guys, been a while. Hopefully I can make a long story short. Added a vortech to the car with the 8 lbs blow off yesterday. Wow, big issues here! The oil dipstick is blowing oil all over the place. Tried to use a sealer to stop the leaking and it just kicked the pressure up the tube, popping the dipstick out of the tube, and sprayed the engine compartment with oil(man, it's everywhere!!) That's the first thing.
Second, the car is running "PIG RICH" which makes absolutely no sense to me, but that is pretty easy to do. I thought that the car would be Lean due to boost, but I am getting the complete opposite! The car is pulling about 50% in the scan at idle with the MAF in place and is pulling about 25% when I removed the MAF.
Anyone that has a boosted 3400 and is willing to help a guy out, I would be forever in your debt.

Paul

[IsaacHayes]

1) What car is this?
2) What are you using to tune for the boost?

You need to take the rear crank case breather tube, and put a open air filter on it, or put it in the tube that goes from the air filter to the INLET of the S/C. Right now you are pushing boost into the crank case and that is why oil is being blown out. NOT GOOD for your seals!!!

The PCV valve will be fine hooked up like stock, as it has a check valve anyways on it.

[MMGT1]

Thanks for your response. I am doing exactly like you say. Having the BOV flange welded to a piece of inlet pipe so it will sit between the blower and the MAF. I will try the PCV in it's stock location and put the breather on the back. The boost was going into the rear valve cover causing this issue. As soon as the BOV is ready I should be good to go. Luckily I only had the car at idle, right after the install, and put the factory belt back on right away as to not cause any damage. Man, I am so close I can taste it. SMILES!!!!

This is a 2000 Grand AM GT1 with a Milzy Stage 2 engine package. Can't wait to say..."Look Ma', I'm goin' fast!!!!!"

Actually it is already pretty fast, just giving it a little more. My plan is to finish this set-up and I'm going to make another run to Dayton, Ohio to have the trans swapped for a 6 speed manual in the spring

[IsaacHayes]

You also need larger injectors, and then a REAL ECM tune for boost. The zspec/rsm crap ECM does nothing for tune. Good thing you have a MAF still you can tune with that.

Are you running an intercooler? That would be the next thing I would go for. You'll make more power and be safer. BOV before MAF is good there.

[MMGT1]

Have 36 lb injectors in it. Was only hitting 50% duty at 6800 N/A and hitting 8000Hz on the MAF @ WOT. Figured that with the amount of boost I have I should have no problem tuning it once the mechanical is right. My MAF tops at 11,500 Hz. Thanks again for your input. You've put my mind at ease on a couple of issues here, really.....

Paul

Sorry was going to add that I have had my HP tuners package for two years now and am pretty good with the tuning side. Have done a lot of reading on the tuning aspect itself, it's a matter of the set-up I'm doing is a little different than the car it came from. There has been a lot fab into this. I had to completely change the drive on the charger to get it in there and keep my headers in place. Looks like every charger you've seen on a GA but it has been a lot of work man! Spent my whole long weekend on it!!

[IsaacHayes]

Great! You may be one of the few ones with the RSM CSC kit that has a tune! LOL

Sounds like you are in the right direction!! (but I'd still upgrade to an intercooler sometime).

If your MAF maxes out, you can run a LS1 MAF.

[MMGT1]

Good to know about the MAF too. There are posted MAF tables over on HP for the LS1 MAF as well. Would be an easy exchange.
Question for you again though,,...would you know if the MAF is the same size, just a different sensor or is it bigger than the Grand AM one? Diameter on the GA MAF is huge( I'm pretty sure it is about a 3") but the sensor is the draw back I know.

[IsaacHayes]

I think they vary between 3 and 3.5". I think the later years and or corvette/truck got the larger ones. Some if not all have the IAT built in too with a 5 pin connector which could be a slick setup for you. Also I think the SS/ws6/z06 got larger ones. Best to look into it some.

a quick google and i found this page http://www.ls1howto.com/index.php?article=25

[MMGT1]

I just checked out that MAF. Definately the way to go if mine tops out. I like the air temp sensor in there for this type of set up for sure!

[1988GTU]

I wouldn't add a larger MAF. Boost is different than N/A, you want to keep the flow consistent at best and have as little interruptions as possible. Sinister performance probably could help you out with what you need done or can guide you the way. Your injectors are probably statically hanging open and just flooding the engine and from there all hell is breaking loose.
Search google for sinister performance/gmtuners .

[IsaacHayes]

The LS series MAF's are available in 3". It's only the higher end models that got the 3.5" for less air restriction sucking through them. So if he goes with a 3", it's no different than stock only has more ability to measure more grams of air.

I agree you don't want a 3.5" air pocket that goes back down to 3" again.

[1988GTU]

So if he goes with a 3", it's no different than stock only has more ability to measure more grams of air.

Now that would be ideal to have!

[timg]

I agree, add a large breather to the PCV system lines from the rear head, front head, and valley.

Where is the MAF positioned? If it before or after the supercharger?

Tim

[IsaacHayes]

After the S/C, and after the BOV.