JCurtin

iTrader: (1)

Found out why my track times were getting worse and worse. My maf had black crap all over the sensors. 1st run was 293hp. Down over 50horse from last year. Cleaned the maf, power was back. 348/358 n/a.

Then came the 90shot. Well I my a/f hit 14.2 quit the run.

Waited for bottle pressure to drop next pull. 440hp/586tq. Had to get out of it, a/f once again 14.4 spike @ 3600rpm, then down to 14.1 to 13s

Next take out the 90 pills put in 50pills.

408hp/492tq. Once again
3100 13.1
3500 13.9
3600 14.4
3700 14.1
3800 13.9 and then down.

I have an slp maf, since I have been spraying it was covered in black soot. Cleaned it off and my n/a pulls were fine again.

5177 dry, anyone else have this black stuff appear on the maf? I surely dont want to lose a motor.

I thought I would be ok spraying a 90shot? I didnt even get to try the 125.

N/a I was 13.1 from 3000 to 5600.

What gives, or is this the norm?

jessedale98

iTrader: (16)

Ummm... not too sure on the dry shot. Seems like maybe ur blowing **** from ur filter and its getting stuck in ur maf. Why dont u just hook up a wet kit, thats what im on and ive never expereinced what ur problem is.

JCurtin

iTrader: (1)

If that was the case, power would have been down. I didnt experience n/a power loss until I started spraying.
Dirty maf-292, clean maf 348. I dont know. Might go wet, no clue. Might just say to hell with it all together.

jessedale98

iTrader: (16)

Well, dont say to hell with it, just cause ur having probs. Im sure someone on here knows what the problem is.

CAT3

iTrader: (9)

I think Jesse meant that when you spray your dislodging debris and making it airborne which is trapping the MAF wires. I use Dry, no Filter, and no issues, on a stock descreened MAF. I have never seen or heard of your particular issue, but if your spraying with the filter in, that could be it. GL and dont give up on it.

Charlie

JCurtin

iTrader: (1)

I no longer have a stock maf to try. When I was at the dyno a year ago, I swapped my slp maf with a friends maf right on the dyno. No hp/tq difference what so ever between the slp and stocker.

I dont know, I guess I am really bummed. Finally got to feel that kick something serious on the dyno, and well, I cant even use it. Hopefully someone posts up with what the problem could be.

Beer99C5

iTrader: (21)

Was your the A/F ever below 12 on Nitrous?

My Dry AFR on a 50 shot was 12.5 and that was enough for Vin to say we would not go any higher on the Dry because it was too lean. Mid June I am changing out the dry nozzles from 45° exit to 90° exit to try and richen it up. I don't plan on moving the nozzles as I dont want the Blackwing to look like a pin cushion, and I pretty much got them in the best location already (I think).

Maybe a change in your nozzle placement or Nozzle type would bring your AFR to where it should be?

Beer

JCurtin

iTrader: (1)

A/F was never below 13.2 on nitrous.
Even n/a its 13.1 from 3000-5300

Beer99C5

iTrader: (21)

Got a Pic or your nozzle placement?
Is your nozzle the blue 45° NOS style?

JCurtin

iTrader: (1)

Hmm, no pics, I'll take some tomorrow. Not blue like that either. I drilled the holes in my lid exactly how the pics showed in the 5177 manual.

brad8266

iTrader: (23)

I would start by getting rid of the SLP MAF because they suck,especially if you are untuned because they will trick the PCM to run leaner than it should which is a no no with nitrous. Then try spraying without the filter in and if its Ok then spray with the filter in and see it thats Ok too. And if by chance you have an air filter that you have to oil (K&N) get rid of that and go back to a paper filter.

Somebody09

Shame on you!

Big Geek

iTrader: (2)

This is NOT the norm and here is what I think is going on with your system.

One - Please post several pics of your nozzle placement.

Two- Are you running filters on the nozzles? If so then I am going to say that a couple of other things could be happening.

A) Check the cleanliness of the filter, lid, and anything else in front of
the MAF because as the N2O hits it is still under several hundred
pounds of PSI and can blow any crud loose and having it swirling
around until it is sucked into the TB right past the MAF.

B) Check the amount of sulfer content in the N2O you are using.
Believe it or not everyone does not use the same quality of N2O
and the more sulfer there is in the mixture the more carbon buildup
you will get. A wet system is allot more forgiving in this area as
compared to a dry setup.

Answer these questions if you will and lets see where you stand. Hope this helps.

Jim C.

PS-PUT THE STOCK MAF BACK IN AS WELL!!!!!!!!!!

JCurtin

iTrader: (1)

I will snap some pics of the nozzle placement today. Also there is a filter before the nozzles I am pretty sure.
The nitrous I am using is fine. No one else has any issues with it.

So for sure I need
Stock Maf
Paper Filter

BadAssFast

iTrader: (2)

of course a wet system would elimate all these issues. my .02.

edit - i'll add if you have something real strange in your bottle it would get lost in your motor...whatever "it" is.

Brian2006

iTrader: (42)

is this the way your nozzles are hooked up?

JCurtin

iTrader: (1)

Brian that is exactly how mine is hooked up. Exact position.

Brian2006

iTrader: (42)

yeah that's my setup right there and I haven't sprayed it yet. Hopefully I won't run into your problem

CAT3

iTrader: (9)

JC, were you spraying with your filter in the lid? If so, take the filter out, remove any debris in the area of airflow, and try it.

How is carbon going to get built up on the MAF? I dont get it? The nitrous is a liquid in the bottle and line, turns into a gas as it exits the nozzle, and get drawn thru the intake tract, into the cylinders, where once the valves close and combustion happens, thats when you will get carbon. However, Nitrous use inherently removes carbon buildup from piston tops and chambers when used regulary

Anyway, if you cut the under side of the lid base, make sure there is nothing b.w the rad. and condensor also. I inspect mine prior to track time, and if needed, wash that area out.

Robert56

iTrader: (2)

So far I have from reading, the stock 5177 nozzles are straight shooters, designed to come from tha sides like Brian2006, and yes some cars run lean in this postion. If you are going to try a different nozzle in this same location, try the 45* style that Beer mentioned, as 90*'s would just hit your lid. Using the 45* would allow a more direct hit on the MAF wires, and this may richin it up. If that dosen't work, or your willing to move nozzles, place them in the neck (like pic below). I have mine in the neck with one 90* and one Straight, and current a/f is 11.25, and they are both about 3inches away from MAF. Prior to running a 90 and a straight, I was running both straight and had about 11.5/11.7 area, so you can see what nozzles can do (I did a set up like yours on a stock vette box and it was a little lean also). Turning 90*'s or 45*'s slightly up or down can also affect a/f and MAF reading. Like Charlie, I have never heard of nitrous causing any deposits on MAF wires, however, I have seen and heard of oiled filters causing this. Also, as brad8622 stated, get rid of the aftermarket MAF, I rarely hear any good from running these. Don't be disheartened, sometimes a certain car will require more tuning than another, and don't think for one minute that wet guys don't have problems also, just read the posts. Keep us posted, as I am sure I am not the only one that would like to know what's up.

Robert