Thread: Dual Dominator vs. Single Dominator Power?

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lose the old bow tie 862/861 s? head s the intake runner is not the best any more i spent $1000s on them they were ok in there day but most all the time the runner was to big and lazy try a profiler intake single 4500 i would think all or better then a 1150 cfm the last set was good port 375.5 cfm @800 bad port 375.3 @800and on ex 280.4 @750 no pipe i can get a great deal on any of the cnc Darts

Pat the heads are 861 and are the second design with raised intake and exhaust ports. Just trying to squeeze a little more out of this thing without spending a lot of money right now. The cam specs I got are Crane cam 280 degrees @ .050 on the intake and 292 degrees @ .050 on the exhaust on a 110 degree lobe center but nobody seems to know the lift.

Originally Posted by burnout1969

Pat the heads are 861 and are the second design with raised intake and exhaust ports. Just trying to squeeze a little more out of this thing without spending a lot of money right now. The cam specs I got are Crane cam 280 degrees @ .050 on the intake and 292 degrees @ .050 on the exhaust on a 110 degree lobe center but nobody seems to know the lift.

Don't know if it's valid or not, but most of the cams in that range in my Crane catalog are 0.714" lift. That particular cam of yours is not listed.

Originally Posted by burnout1969

Pat the heads are 861 and are the second design with raised intake and exhaust ports. Just trying to squeeze a little more out of this thing without spending a lot of money right now. The cam specs I got are Crane cam 280 degrees @ .050 on the intake and 292 degrees @ .050 on the exhaust on a 110 degree lobe center but nobody seems to know the lift.

all of the 861 i have work with were raised intake port along with the ex .that dog leg part of the port his not that hot and the eldelbrock super victor were the same head with out the ex vein .you did not say with intake you have on this engine .what ratio rocker arms ?1.7. 1.7.5 1.8 ??? them heads alot of guys closed down the port with A&B putty that is what was done to my heads and i have done it to others heads.stock the runner was to big with a bigger engine you may leave the port stock or open it up but gets very lazy and have seen over work heads that just do not work but look nice,,, you would need a big lift cam and very hi rpms and still may not work so hot . i know abit about them heads i spent alot of $$and time on them heads and do have the super vic on my 632 donovan them heads with work are ok but your looking at 25+ year old pro stock heads much better heads out there i seen my heads flowed stock .flowed rework .and the last time i re did the valve job and rework the heads the numbers i posted were the last time when i rebuilt the 572 for the customer i know what numbers my engine made with them heads and two cams with a re work super vic intake i did and a tunnel ram with 4500 s the tunnel ram made some more power but they did the cam at the same time so hard to say how much he realy pick up i think it was 100 hp over the street cam and intake was 750 hp @ 6500 and 850 @ 6500 heads dead headed the com .i think... but he sprays it500hp+? as it was built for spray no numbers on spray never would tell me and i built the dam thing