markdunlap

Ok, no one has had any questions in this section since April 3rd. What gives? No one needs to know anything about carbs anymore? Not even Quadrajunks?

Well, I do. It's been asked before, I'm sure.

What does it take to convert a Holley HP Dominator carb from a tunnel ram calibration to a single 4 calibration?

For example a 1250 CFM - 80533 2X4, versus a 80532-1 single 4 application.

The air bleeds are different.

The linkage is different

The metering blocks have a different number.

But can you just change the air bleeds and use it successfully?

80533 has progressive linkage, 80532-1 has soft progressive. Not a big deal if using a transbrake, right?

80533 has .053" idle bleeds, .065" intermediate, and .036" high.
80532-1 .051" .061" .028"

Just change them out, right?

Both come with 97 jets and blocked power valves, or 92 jets and power valves. Seen em both ways.

80533 has 34R11972-4A metering blocks.
80532-1 34R11972-5A

This is what I don't know if it makes a difference??

Maybe one has no power valve provision and one has power valves, I don't remember?

But are there other calibration difference in the metering block, and does it make much difference if you decide to convert all the other items over from tunnel ram to single 4 barrel use??


Also I have noticed that a lot of the new ULTRA HP Dominators are listed for 2 X 4 usage in the Holley literature and catalogs. Is that a mistake in printing? If so, there are no 1250 ULTA HP Dominators listed for single 4 use.

Ok, if you made it thru all that, you are just as bored as I am waiting for it to quit raining on the weekends so I can go try out some carbs I spent all winter tinkering with.