Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

jmanhoff said
Yeah I plan to get a wide band in the next coming weeks and use that for tuning, I was just curious if there was anymore useful input with my current situation.

Do these numbers sound pretty good for AFRs?
WOT: 13.0>
Cruise: 14.5-15.0
Idle: 15.0

I've been basing my jetting off of what the plugs tell me and how the exhaust smells, but I think with the right PV I can get away with running 64 primaries. It does fine under mild acceleration but started to get a little surgey when I put my foot down a little (coincidentally right around 9 inches of vacuum.) which is why I ordered a 9.5PV. I know every engine is different, but the fundamentals are the same which is what I'm trying to get a grasp of here.

Well again, the jets have ZERO effect at idle, so they will NOT affect the exhaust smell. So unless you're somehow hangin your head off the back bumper driving down the road to smell the exhaust, the only way you're doin it is at idle. Jets do NOT tune idle mixture. Where are you getting those readings from if you don't have a wideband yet? And btw, IMO, these are great little carburetors for the money. I have a 450 VS Slayer on the slant 6 in my 64 Valiant and I ran one same as yours on the 400 in my 75F250 for a while. It wasn't quite enough for it and I ended up with a Street Demon 750. I still have the Brawler, though.