1050 Dominator BS Filter Needed

[Keith 944]

pm sent. I found his card, his website address did not come up so I sent you his #

[jmarkaudio]

The 8896 does not have a great calibration, not what I like to see for any app. As far as 2 or 3 circuit, it really depends on the type and setup of the stop. Most will run well with a 2 circuit, one I built for a friend running Super Street has 3 Wally's in the last 2 years and has made 2 years with it to the Jegs All-Stars.

As far as what 2 circuit works well on, if the car has an inline stop the 2 circuit will work well. If it's a plate under carb stop with only the primaries open most of the time a 2 circuit is fine. Where it gets tricky is if the primary plates get closed too far, big engine or RPM too low, or the plate is set to a 1 to 1 linkage the plates will not be opened much. In those instances getting enough air past the boosters can be an issue, and the amount of fuel delivered by the idle and transition circuits are minimal. This can run the engine on the ragged lean edge, not to hurt anything as the load on the engine at that point is low, but enough to make the car possibly surge on the stop or stumble coming off. A SMALL amount of intermediate fuel may be helpful in those instances. For a disc stop, I would suspect that because the airflow is in the center the boosters should have sufficient airflow that a 2 circuit would work just fine.

[Pony Pilot]

Originally Posted by jmarkaudio

The 8896 does not have a great calibration, not what I like to see for any app. As far as 2 or 3 circuit, it really depends on the type and setup of the stop. Most will run well with a 2 circuit, one I built for a friend running Super Street has 3 Wally's in the last 2 years and has made 2 years with it to the Jegs All-Stars.

As far as what 2 circuit works well on, if the car has an inline stop the 2 circuit will work well. If it's a plate under carb stop with only the primaries open most of the time a 2 circuit is fine. Where it gets tricky is if the primary plates get closed too far, big engine or RPM too low, or the plate is set to a 1 to 1 linkage the plates will not be opened much. In those instances getting enough air past the boosters can be an issue, and the amount of fuel delivered by the idle and transition circuits are minimal. This can run the engine on the ragged lean edge, not to hurt anything as the load on the engine at that point is low, but enough to make the car possibly surge on the stop or stumble coming off. A SMALL amount of intermediate fuel may be helpful in those instances. For a disc stop, I would suspect that because the airflow is in the center the boosters should have sufficient airflow that a 2 circuit would work just fine.

My plan is a #1 Stop electric under-carb stop with primary and secondary butterflies. My current setup on my smaller motor is a 950 Proform with power valves plugged and #84 jets all around. There is also a 4-butterfly #1 Stop under it and it comes off the stop perfectly. It appears, though, that my current combination wants more gas off the starting line, but doesn't need it down track. I'm hoping the intermediate circuit in the Dominator will solve that.

[jmarkaudio]

I would make sure you get a stop that keeps only the primaries open on the stop. As far as more fuel at the start, there are other things you can do to help that out.

As far as what you bought, I would box it up as I don't like the calibrations in the 8896 at all. Ideally a custom 3 circuit is best, one using BLP's wide body metering blocks is what I would suggest. It's a little more initial expense for a custom carb but you will be much happier in the long run. There are several builders that use BLP parts, as well as having one built by BLP. If you are stuck on getting an out of the box model and a 3 circuit go with one of the Quick Fuel QFX 3 circuit carbs.

[jmarkaudio]

Looks like their DA-6PK stop will be fine, the linkage is progressive and not 1 to 1.

[Pony Pilot]

Ordered a Pro Systems Dominator this morning. I guess the other will go back to Jeg's next week. Thanks to all for your help; you guys probably saved me at least several weeks otherwise spent tuning that stock carb!

[jmarkaudio]

Maybe. Good luck.