something was happening at about 6000 rpm right at the end of the video, could not figure it out.. its 133,000 mile stock long block car, spraying 200

 

Was it that inital bang or the popping at the end of the video you were referring to?

-Garrett

 

Looks like it hit pretty hard. Couple questions to help determine what that was around 6k.Do you have a copy of the dyno graph you can post here? How about some data logs? What type of system? Jet spread? Plug? Plug gap? Timing?What are you using to pull timing? Help me help you

 

it wasn't the popping, it like surges, Im running b8efs at .032.
ill post the graph later.. I don't know the technical questions, my tuner did it

 

my jets were 78/42

 

looked like a good hit then maybe hit the rev limiter at the end?

 

Sounded like solenoids cutting on and off. Fuel pressure safety switch? Window switch? WOT switch?

 

the solenoids are nitrous outlet, idont have a FPSS, and its a plate kit with a window switch that comes on and off from the WOT sensor

 

and my tuner turned up the rev limiter

 

possibly window switch might be acting up..... other thing that can cause surging is running out of bottle pressure (bottle running out maybe?)... but sounds like you hit limiter.... it wasn't like a regular limiter cut off since it cuts fuel, but you have fuel that will still come in from the nitrous kit.....

 

the window switch is a NOS brand, maybe ill see if theres a way to test it. wasn't the bottle pressure stayed ay 900 and I just filled it

 

Hit the rev limiter on motor to verify it goes higher than when that surging happened....

 

^^^What he said. Run it past 6000 rpms on the motor and see if it does the same thing.

 

ran out of fuel??

 

What's your fuel system?

 

stock injectors and racetronix pump

 

Can you post the dyno graph with the Air/Fuel chart as well?

 

here is the dyno sheet

 

Did the nitrous noid cut out?
Whats your timing?
I would guess you lost bottle psi car went fat and loading up on fuel.

 

the solenoids are nitrous outlet and not old at all, they have never done that before. and I haven't changed anything since last tune