1250 vs 1450 dominator

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1250 vs 1450 dominator

Post  deliveredfast on June 4th 2014, 2:30 pm

Hey guys, I was just wondering if anyone knew or if there is a formula to tell me how many hp is another 200cfm worth? and I just recently ran my car and have yet to tune it in, but I used 1 of those cfm calculators and it says with a 598ci motor to turn 7600 rpm I need 1450 cfm carb. even with my car turning 7100 rpm in the traps with tight convertor it said I still needed 1375 cfm. thx.


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Re: 1250 vs 1450 dominator

Post  Copperhead on June 4th 2014, 3:42 pm

My builder recommended a Quick Fuel QFX 1450 for my 598 and that's what I went with. He said a 1250 would've worked, BUT,.... I'd be leaving a few hp on the table. Not to mention, I wouldn't have any room for growth down the road when I wanted to upgrade the engine at a later date.

FWIW,....
I ran a 1250 on my 557 and it seemed to perform well.




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Re: 1250 vs 1450 dominator

Post  bbf-falcon on June 5th 2014, 1:33 am

1450 ftw. ProSystems calculated my 557 for a 1390 cfm. single 4

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Re: 1250 vs 1450 dominator

Post  richter69 on June 6th 2014, 11:43 am

1450 qfx on my p51 headed 564". Runs awesome. Carb gets on the 2step a lot cleaner and quicker than my 1250 did
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Re: 1250 vs 1450 dominator

Post  10SHOTS on December 16th 2015, 12:02 am

richter69 wrote:1450 qfx on my p51 headed 564". Runs awesome. Carb gets on the 2step a lot cleaner and quicker than my 1250 did

is your 1450 an out of the box deal or a Oakley special
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Re: 1250 vs 1450 dominator

Post  richter69 on December 16th 2015, 6:45 pm

It was out of the box, the next one wont be..
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Re: 1250 vs 1450 dominator

Post  rmcomprandy on December 16th 2015, 10:31 pm

This past week we had a 648 "Big Chief" Chevy on the dyno with a single, well tuned 1450 QFX; the customer had a new Holley 1350 in its un-opened box; part number #080909RD.

We had to chamfer the upper edge of the Jomar "PowerCone" so, the 2.350" throttle bore would line-up.
It was impressive.
It made about 4 less peak horsepower at the same RPM with about 23 lb/ft more peak torque at the same RPM; Right out of the box.

It had a TPS on the side for computer controlled ignition timing which we didn't use.

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Re: 1250 vs 1450 dominator

Post  10SHOTS on December 21st 2015, 1:43 am

nice ! , I wonder if the gen 3 1250 Holley would be a better choice than a 1250 quick fuel
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