Whats the difference ? 4150 question !

There doesn’t seem to be much love from a few of the carb builders for the 1.600 x 1.750 Holley Ultra HP carb or body.

I wouldn’t mind trying an untouched one on the dyno with an “appropriate” build ....... just to see for myself...... but I’m not interested enough to spend $942 for that experiment.
To me, an appropriate build would be something over 500” making solidly over 700hp.

I was looking through some dyno sheets.......
I had taken a Mighty Demon 850DP(those are 1.560 x 1.750) in on trade for something a few years back.
The tune up someone put in it was just dumb(and wrong).
I put it back to stock, and then tweaked on it with a few different motors, and it ended up being a pretty good dyno mule carb.

I had gotten to a point where I was pretty “carb rich” and decided to thin out the herd....... and that was one that went to a new home.

I often feel like I should have kept that one.

The best working ootb “large venturi” 4150 carb I’ve used was a QFT Q-1050 down leg on a street 572 with EZ heads.
Those are 1.590 x 1.750.

I think we may have done one jet change on it, and it was good.
It made a few HP more than my MD850.