dominator on a 540
07-01-2007, 01:34 PM
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dominator on a 540
I have been having a hell of a time tuning my new mill....I have had people tell me pull the power valves and some say leave them in.................................Can someone please tell me what a na 540 9.5 to 1 comp, with a dominator braswell 1050 , where i should strart as far as power valves and jetting.........I tried to use the block offs and i am at 91 jets now and still to lean...........Help please..................
I am so close...........
I am so close...........
07-01-2007, 04:30 PM
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Use a power valve. You can do a search on here for power valves & you might get some better ideas as to which one you will need to start with. I would start with a 4.5. A 4.5 will open when the manifold vacumm goes below 4.5"
07-09-2007, 06:01 PM
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It is actually a brasswell, i am at the point i need a new baseline to start from........1050 need guys that run a 540 with big a cam good guts and great exhaust.........No power valves has been killing me i cant tune this bastard.......
HELP PLEASE, TYLER,TOMMY,JC,ANYBODY !!!!!!!!!!!!!!!!
HELP PLEASE, TYLER,TOMMY,JC,ANYBODY !!!!!!!!!!!!!!!!
07-10-2007, 09:24 AM
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There are many different Dominators set ups. However most of them seem to come from Holley with square jetting at 90 and #6.5 power valves. Since you have 91's and no power valves, it would seem that you are lean. A power valve adds about 6 jet sizes. Teague, in one of his tech articles in Powerboat mag recommended a 8082-1 Holley 2 circuit 1050 with the addition of 2.5 power valves as a good carb for a high perf. 540. Mine has 92 jets and 3.5 power valves.
07-10-2007, 09:29 AM
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Teague, in one of his tech articles in Powerboat mag recommended a 8082-1 Holley 2 circuit 1050 with the addition of 2.5 power valves as a good carb for a high perf. 540. Mine has 92 jets and 3.5 power valves.
JH
07-10-2007, 09:53 AM
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Mine is a Holley Dominator 1150 CFM #7320 (2-circuit) with 87 X 87 jets and 3.5 PV.
With a big cam, you may also need to reduce the idle air bleeds 3-5 sizes (richer) if a high idle setting in neutral is causing you are opening the throttle blades to the point of pulling fuel out of the transfer slots. A good indicator will be if the 4 corner idle screws are unresponsive.
I agree with the comments on a 3 circuit carb...sell it!
With a big cam, you may also need to reduce the idle air bleeds 3-5 sizes (richer) if a high idle setting in neutral is causing you are opening the throttle blades to the point of pulling fuel out of the transfer slots. A good indicator will be if the 4 corner idle screws are unresponsive.
I agree with the comments on a 3 circuit carb...sell it!
