Holley/Demon Carb stumble

The new aluminum main bodies are nicer than the original Zinc Proform bodies.
But I think that’s what you get if you buy a Proform body now.

If you noticed in the video, one of the 4 emulsion holes on the Brawler block was plugged.

We’ve put a handful of them on a few motors over the last couple of years, and they’ve worked out well.

I wasn’t very impressed with that Holley Track Warrior 750 needing 86/96 jetting for a 600hp motor.
Generally, when you have jets that big in a carb that small, the part throttle is super rich(which is probably why they said it wouldn’t make a good street/strip carb in that video).

Had a similar experience with a SB Ford oval track motor.
It was also around 600hp.
Owner had a new Holley XP 750....... needed tons of jet, and leaned out a lot as rpm went up.
Played with jets and bleeds........ didn’t really come around.
It exhibited that super rich at part throttle trend.

The 3 or 4 year old Baker 750 they’d been using was acting up, so they bought the new carb.
Made a few pulls with the Baker, which was uncharacteristicly erratic.
It had never had a bowl off it.

Popped the bowls, new metering block and bowl gaskets, needle and seat o-rings, PV...... back on the motor....... ran excellent.
Crushed the new Holley.