Sport Side

iTrader: (6)

I'm having a problem with my dry shot.
It's a .52 pill (100 app.) sprayed 7'' infront of the MAF.
Without the spray, everything is a-okay.
One thing to note is that I do not have a bottle warmer and the bottle was reading 800 psi.
When I hit the nitrous, the motor just sits there... Almost similar to a bog. I guess that would be the best way to explain it. The rpms just sit there and you can almost hear a strain.

The occurances are very random so I don't want to give any misleading information. On the street, I had a .34 pill (50 app.) set up and I nailed the gas in first and once the tach saw 4000 rpm I activated the nitrous... Seemed to have worked.
Hit the nitrous out of the hole at the track, and the bog similation occured.
Next pass, I nail it and then activate the nitrous after the converter flashes and the same bog-**** happens.

I'm kinda confused... and I know my information probably sucks but, I'm having a hard time describing what I don't understand.

Anyone had anything similar happen?

Robert56

iTrader: (2)

It was working fine prior to this correct?
Robert

brad8266

iTrader: (23)

You want to get that bottle PSI up there to around 1000PSI in oder to get a good flow of liquid nitrous through the lines. 800 is a little too low and the nitrous may still be gaseous. Get the bottle warm and try it again, then at least you will have eliminated one potential problem.

Sport Side

iTrader: (6)

Yeah. It worked with the MAF before. Then, I did the SD tune and no problems.
Now with this new setup,all of a sudden....

Robert56

iTrader: (2)

Are you using the IAT for fuel enrichment?
Robert

Sport Side

iTrader: (6)

No, I relocated an IAT sensor to the air box, incase I ever decide to go SD again. So, the IAT that is apart of the MAF is not functional.

Sooo, yes, fuel enrichment.

Robert56

iTrader: (2)

Did you add an additional fuel multiplier in your Power Adder vs IAT table? Sounds like maybe your not getting enrichment, and the 50 shot was small enough to be just lean, whereas, the 100 shot is way lean and it's stumbling?
Robert

BMN

Plugs???

Matt@HSW

iTrader: (14)

Did you just re-flash the computer with the saved file from before or did you manually tweek the SD tune file and then flash it?

Matt

Sport Side

iTrader: (6)

Ran strong on motor but, they are relatively new plugs. Only had a 75/100 shot sprayed two times at the track... I'm not making excuses but, I'm no expert on plug life. Worked well with the old nitrous setup... The only difference is now I'm reusing the MAF and it wants to fumble everytime I hit the N2O.
With the SD tune, I was adding fuel thru PE and yes, just reflashing the computer each time, adjusted for the size shot.

I don't have the Power Adder vs. IAT table with my earlier computer. I don't understand why it would run lean with the MAF? Above 5500-rpm my injector duty cycle is above 100%, however.

Matt@HSW

iTrader: (14)

If your DC is over 100% your injectors are static (wide open all the time). Could be a big part of the problem. If possible move up to a larger size.

Matt

Sport Side

iTrader: (6)

They are 'wide open all the time' when the IDC is @ or over 100%. In my case, I don't experience 100% DC until 5500-rpm with a 100 shot. And my problem is occuring way before this... At the initial hit to be exact.
But, yes... I do need some new injectors.

Matt@HSW

iTrader: (14)

Is it possible that some of your SD tune is lingering in the tune you are now using? If not I would try relocating the IAT sensor back to it's stock location.

Matt

Sport Side

iTrader: (6)

Being as the IAT relocation has been my only true change, I think you may be guiding me in the right direction. Thanks Matt.