BCK I get what you are trying to do, would be nice to see your different carb and intake combo power difference. problem is on here there a lot of experts that always chime in to tell you what you are doing wrong but never have any real world dyno numbers of there own to compare what you are trying to do. only tell you what you are doing wrong, what wrong cam you have in, your wrong heads, your choice of intakes suck, the dyno you use sucks and so on. thanks for trying to compare carbs.

I agree somewhat. But its also good to hear others opinions. Theres a few guys who posted some good info on this thread. Horsepower1 , haxbyspeed, panther, matt, and some others tried giving out some insight. Whether or not its liked, it is a tech forum

Did you get around to running your 540s with the 325s and madera cams yet ? What kind of power did they make?

I didn't reread this thread and I honestly forget what transpired in it. I did end up dynoing with several different combinations of carbs/ intakes/ spacers. 3 different dominators, 1 4150, 2 intakes, 3 spacers, iirc.

The summary was:
Swap a cam + 15 hp
Swap a intake + 10 hp
Swap a carb + 10 hp
Add a spacer + 5 hp
Add another spacer + 5 hp

you are correct there are some good points made you just have to read between the lines a bit. I am close to being complete, took a little more time because I don't have an open check book. builder has motors about 2 weeks from being complete. then off to dyno. just got complete ignition, still up in the air with carbs, I have 4150's with merlin intakes and have a set of 1050 dominators with no intakes? guess I will leave it up to Brad Nickerson to send him the 1050"s before the motors and buy new intakes or go with the 4150 and intakes I have? it will be his call on price vs gain. thanks for asking MT.

what 4500 intake worked best? how much difference between 4150 and dominator?

I don't know how it would apply to your combo, but using the dominators was an improvement for me even with using an adapter and 4150 intake. My 4150s actually flowed 986 cfm, so its not like they were small.

Unfortunately I couldn't test different 4500 intakes as I was just using what I could borrow. I just tested a 4150 Vic Jr vs a 4500 Victor. I think I picked up 10 hp and a decent amount of tq by putting the 4500 on top of the 4150 Vic Jr. It's all posted in a couple threads on here.

Dont forget, there is power to be found in porting these intakes as well.

thank you for posting what you found. I am not 100% sure which direction I will end up as far as carb and intake but I would be glad to post what my results are from my completed engine project.