What I think might be going on is you had too much tire spin with your higher stall because you were in or close to your power range, but not enough tire. Same thing with your higher launch rpm. Also with your wheelie bar at 6", your front end is building up momentum and hits the wheelie bar and unloads the slicks, because it's kinda shocking/ upsetting the chassis. We run ours at about 2", and let the wheelie bar flex to more gently push the front end down. Look don't get crazy about adding more weight to your front end. Some racers are afraid the extra weight will slow the car down, but I've gone faster after adding another 20 lbs to the front. i know some fast guys that have over 90 lbs bolted to the front. Don't get me wrong lighter cars do go faster, but when you can't steer the car or you keep hitting your wheelie bar hard, ADD weight.
I checked a website that can figure speed from tire size, rpm, and current rear gear, with your 30" 4.11, 8500 rpm combo, your 1/4 MPH would be 184.58, which really doesn't match your 1/8 numbers. So if you changed to 4.56 with your 30" tire, your speed would be 166mph. But I think a better combo would be 4.56 with 31x12x15 slicks = 172 mph. And if your motor isn't making enough HP to go 172 mph the bigger gear will help you get your motor in a better power range. Remember bigger gears multiply power. That combo with a looser converter and more traction should get you closer to the performance you're looking for. BTW if you are going to buy some gears you don't really need the "pro gears" because your dragster is lighter than a heavy door car. As I said before GoodYear is not currently making their light weight [ 22.6lbs] D2585 31x12x15 tire, but if you want I guess I could sell you a used set I have [ right now I have 5 sets, two mounted, one on 11" wheels and the other on 12" wheels]. Retail on new tires is $362 ea plus shipping, I could sell you a pair for $200 pr, plus shipping.
Thank you for posting your computer graph, it helps me see what is going on with your car. I pulled up a couple of my runs on my RacePak to have something to compare. What I pulled up was one of my Hemi engine runs thinking it might be closer to your Ford.
We ran 7.123 , 186 mph, with my 4.56, 31x12x15 on 12" wheels at 6 # pressure, launch at 6100 rpm, converter flashing [ stall] at 8100, shifted at 9200. The true stall is figured by looking at what the engine RPM drops to right after the shift, your looks like 6800 rpm. Again if you can talk to your cam guy to find out what RPM range your motor should make good power. The very best is to get your motor on a dyno, and if you should decide to work with a converter company, they would like a dyno chart. BTW I highly recommend A-1 Performance, I don't know of any fast JrFueler running anything other than an A-1. Ya I know I'm always refering to JF, but I thought that would compare to your NA alky burning FED.
I also noticed on your computer chart your driveshaft speed has some big ups and downs, that is were your tires are spinning and then hooking-up. I always look at driveshaft speed to figure tire pressures, up looking for less speed [ more traction] or pressure down for more tire speed. I try to run a peak between 2200 to 2500 rpm at about .3 to .5 into the run, with hopefully only one dip, I also will change launch rpm to get better tire speed.
Looking at your race car picture, can you change your weight bar bolts so you could mount your fire bottle there. You may not have to change your steering bellcrank and maybe spend that money on gears, tires, converter work, which I think will get you a better "bang for your buck". Same thing goes for changing your front wheels to 17", unless your tires are looking bad. To change to lighter Anglia type spindles, you may have to change your early Ford style front axle. I'll check to see if anyone makes Anglia spindles for early Ford axle, which also means your current hubs will not fit the Anglia spindles. Again, think about your best "Bang for your Bucks".
The best performance gain will be in changing your power train.
Feel free to call my cell, 805-444-4489, I sure hope this all helps you get "un-lost"
Jon
