I have been running a 50 shot on ls with no problems for a few months, now that i have decided to go to a 75 shot the car boggs at around 4000 rpms. Could it not be getting enough fuel cause of stock pump or possible fuel filter? Or could it be another problem?

 

Damn now i want to watch that.

 

Alright, enough bullshitting. :a:
Perhaps we can actually address the question...

My bet is that the problem is electrical.
What kit are you running?

If it isn't the ZEX kit, have you checked continuity at the throttle switch?
If it is the ZEX kit, is the control module still reading the correct voltage on the TPS lead?

If the nitrous supply is being shut off intermittently -- either by a loss of the TPS signal or a crapped-out throttle switch -- it's possible to run pig rich for a moment. :thinking:

 

my kit is cold fusion from nitrous wharehouse in texas. I forgot and left bottle open for a few weeks while on vacation and it leaked down to empty, is it possible that the filter in the nitrous soleniod is plugged some and the fuel is to much to burn off? Both soleniods are working but dont know if getting much out of nitrous soleniod or not.

 

Well there ya go..
You could have told us earlier about the potentially clogged solenoid earlier... h:

Yes. Pull that nitrous solenoid and check the filter.
When you're on the bottle, if the fuel is making it to the motor and the nitrous isn't.. that would certainly lead to bogging.