Maybe get a reading from our local carb guys on this idea. Background - the dragster runs good, sorting out all the little stuff. Making a bit over 500HP, shifting at 6800. Brent says I'm not spinning it high enough yet LOL. It's inconsistent between 60' and 330'. Incremental is real good between 330' and 660'. I feel like its a carb issue because it'll pick up and not change 60' enough to warrant the 330' increase. I can also feel it "not pull just right" sometimes on the way to high gear. Burnouts and staging RPM are consistent. In the heat we expect maybe .02 variation in 60', but that doesn't explain a 330 going from 3.74 to 3.68 in the same lane 45 minuets apart. 330-660 is good - 3.68 i the middle means 5.68 on top. 3.74=5.74, etc.
Have a built up "750" using Quick fuel blocks, ProForm base and such. It's a little fat but it is hot here. Have no idea what's in the thing, I need to tear it down and get a measure on the details. Pretty sure I ran the blocks as delivered. The main thing is that I'm not trusting it's anywhere close to right.
Option 1 - have a local guy that has built a methanol carb. He has an excellent rep and several cars run his stuff and you can set your watch by the ETs. No oil milking, no issues. However, only have one TnT left before football season and I'm loathe to turn the fuel apple cart over on one single test. Have to engineer an air bleed setup, get top lube and get some test fuel - everything else should be in place to run alcohol. Plenty of pump, plenty of lines, carb in the wrapper ready to mount.
Option 2 - have this nice old 4778 700DP. Date code is 2nd week May, 1972. Near as I can tell it's original. From looking at the specs, I can probably put 4776 blocks on it (have plenty) and jet it to 4778-2 up specs. It has some interesting looking straight leg stepped boosters. So that's really the Q - would it worth while to tinker with the 700 and try that since I can't really trust the home brew frakencarb on this motor. I have a nice 650DP on the door car that runs very consistent so that's why I pulled the 700 out of the box and started looking at it. Interestingly, out of all the carb piles I have here there is not one stocker 4779.
Opinions welcome.