2 Vs. 3 Circuit Dominator
03-30-2008, 04:57 PM
#1
Junior Member
APPRENTICE
Thread Starter
Join Date: Nov 2006
Posts: 13
2 Vs. 3 Circuit Dominator
Guys,
Im wondering what experiences people have had with 2 and 3 circuit dominators. I drag race an 800 hp 540 in a 3200 pound car. Ive been running a 3 circuit 1250 but am looking at a used 1150 - 2 circuit (part #7320). Any thoughts would be great.
Im wondering what experiences people have had with 2 and 3 circuit dominators. I drag race an 800 hp 540 in a 3200 pound car. Ive been running a 3 circuit 1250 but am looking at a used 1150 - 2 circuit (part #7320). Any thoughts would be great.
03-30-2008, 05:23 PM
#2
Senior Member
RACING JUNKIE
Join Date: Jul 2007
Location: Florida
Posts: 635
http://www.motorsportsvillage.com/fo...pic.php?t=3742
Just converted a 1250, still a little lean (ran out of jets) but still made more than a 1050 on the dyno.
Just converted a 1250, still a little lean (ran out of jets) but still made more than a 1050 on the dyno.
04-05-2008, 05:30 AM
#3
Senior Member
EXPERT BUILDER
Join Date: Jan 2005
Posts: 336
im not a carb guru,but my 3 circuit runs rich even after buying the complete assortment of air bleeds.i bought a aem air to fuel ratio gage to monitor.ive heard the three circuit is main advantage is transbraked vehicles at the track.
if your gonna be driving on street ive heard 2 circuits are better.
if your gonna be racing primarily then 3 circuit.
if no racing at all and want to get easiest carb on the streets get a 4150 series,they make em up to i believe 1000 cfm.
good luck russ
if your gonna be driving on street ive heard 2 circuits are better.
if your gonna be racing primarily then 3 circuit.
if no racing at all and want to get easiest carb on the streets get a 4150 series,they make em up to i believe 1000 cfm.
good luck russ
04-05-2008, 08:36 AM
#4
Member
JUNIOR BUILDER
Join Date: Jul 2003
Location: U.S.A.
Posts: 80
The 3 circuit carbs are all real rich at part throttle. The only way around it is to either Block the 3rd circuit or drill and tap it and make your own " jets " or restrictions using a 10-32 set screw.
I've blocked the 3rd circuit and added a restriction to the idle transfer slot on 2 # 9375 Carbs and both performed MUCH better after the mods. One of them was used on 3 differant engines.
There wasnt much if any change in ET, but idle quality was much improved and during part throttle operation there was a HUGE difference.
No More Blackend Spark Plugs.
I've blocked the 3rd circuit and added a restriction to the idle transfer slot on 2 # 9375 Carbs and both performed MUCH better after the mods. One of them was used on 3 differant engines.
There wasnt much if any change in ET, but idle quality was much improved and during part throttle operation there was a HUGE difference.
No More Blackend Spark Plugs.
