345ci Nitrous'd Notchback Progress Thread

So i went to a local dyno tonight, this all started a couple weeks ago my pump started sounding funny when it primed, and it was slowly dropping fuel pressure when cruising. I had a fuel filter sitting on the shelf so i swapped that in and the priming sound went back to normal, and the fuel pressure was where it should have been. This all happened the day before i was going to a local dyno day, the car made 384 hp the first pull, i pulled a total of 8 degrees of timing out of it cause it was detonating and power ended at 395.

About a week ago i talked to my cam guy and he told me something was way off, that i had a bad fuel, i wanted to get the issue sorted out before this racing season so i rented a local dyno, and filled the tank with Sunoco 93 octane fuel, put the original timing map in it(total timing at 31*), and added 20% fuel to the top end of the VE table.

I made my first pass and it pulled nice and smooth, the dyno operator told me it made 416 hp but it was running a little rich, so i took 10% out of the VE table for the next pull and it picked up 2 hp. The next pull i put another degree of timing in it and it made 420 hp. I tried putting 1 more degree in it and power started falling off. By this point, i was 35 minutes into my first hour and had basically done all i needed to do. I figured i would make a couple more pulls and keep playing with the timing, knowing that the trick flow stuff dosent need a ton of timing to make power i decieded to take a few degrees out of it. I backed the timing down to 27 degrees and it made 428hp and 393 ft/lbs.

I was pretty suprised the car made over 400, ive had this car on 3 different dynos and it has made 390 on all of them, the peak came in at about 6100 and the motor held around 420+ hp till 6600. After 6600 the power falls off hard. I looked at one log i took of a pull and its looking like i could be running out of injector, the duty cycle in the upper RPM's shoots up to 92% just before power starts falling off