1050 Dominator 4500 series vs 1000HP 4150 series

Discussion in 'Race 400/430/455' started by eric6659, Jan 30, 2019.

  1. eric6659

    eric6659 Well-Known Member

    Has anyone ever tried both of these combos on their engines? I'm curious as to what would work best on a 600HP 464" combo turning 6000rpm or so (high end street/strip car) thoughts, opinions, etc..
     
  2. Bens99gtp

    Bens99gtp Well-Known Member

    I talked this over with Patrick at pro systems when we did our motor.

    he used the formula (cubes x rpm x volumetric efficiency) /2820

    he says a ve of 90%......expresses as .9 in the formula.........is a strong street motor. were a 110%........1.1in the formula ....... would be a full all assault to the limits of the block.


    a 1000 cfm 4150 rarely is actually flowing a true 1000 cfm.

    the 4150 would be cleaner on the bottom end and more responsive where the 4500 would run strong on the top end and would make more top end power.

    I think the 4150 would be a better choice
     
  3. eric6659

    eric6659 Well-Known Member

    That was my opinion as well, especially on an 1/8 mile racer..
     
    kenny t likes this.
  4. Bens99gtp

    Bens99gtp Well-Known Member

    I'm assuming when you race this is a footbrake car
     
  5. Jim Rodgers

    Jim Rodgers Well-Known Member

    I tried them on the same car, same engine, same intake over a two week period and averaged the results. In the 1/8th mile the 1050 Dominator was worth 2 tenths over a 950. Street Strip combo, 11-1 compression 464, iron Stage 1 heads.

    However, in street driving the 950 was hands down the better performer. Dominators tend to have a surge when street driving.
     
    Julian and ap1672 like this.
  6. BQUICK

    BQUICK Well-Known Member

    I agree with Jim..
    A trick I found was take out the intermediate air bleed on a 3 circuit 1050 Dominator (9375) for street use and it cleans it up at part throttle. Then just put them back in at the track. (only have to change the 2 primaries if soft progressive linkage Dominator)
     
  7. Bens99gtp

    Bens99gtp Well-Known Member

    by tinkering with the intermediate circuit you are also affecting the overall mixture in wide open too.

    sometimes ppl think it only does art throttle fueling ......but even though it does supply fuel here, that circuit remain supplying fuel even wide open. so by leaning it out or eliminating it you are also pulling that fuel from the overall too. same as if you add extra
     
    gymracer01 likes this.
  8. BQUICK

    BQUICK Well-Known Member

    Yeah, but I'm talking about just driving it around...not full throttle. I used to drive my GS (low 10s) to the track for years and it made it a lot crisper cruising with the air bleed out. Then put them back in (don't drop!) and run. I didn't always do it...if the air was real good it was ok with them in. I did forget to put them in once at the track and got on converter and it bogged bad leaving the line....
     
  9. Bens99gtp

    Bens99gtp Well-Known Member

    I'm not saying it wont or didnt work, I just wanted to it it out that that it does effect the entire fuel curve so someone didnt try without knowing it effect top end too not just cruise
     
  10. dan zepnick

    dan zepnick Well-Known Member

    I agree with jim.ive ran them both on low 11,hi 10 second combos. Always ran a tenth or more quicker with the 1050.
     

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