Lost 60 ft.............
#1843251
06/07/15 02:46 AM
06/07/15 02:46 AM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
OP
pro stock
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OP
pro stock
Joined: Oct 2009
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North, Alabama
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I went from a old 950 untuned Holley to a ProSystems 1050 Dominator. Last month I ran a new best 6.21 @ 110.59 with a 1.39 60 ft. I picked up a tenth and 2 mph with the new carb. but my 60 ft. times are a lot slower ,with the old 950 they were 1.33-1.34 almost every pass. Did I slow down on my 60ft. because I went to the bigger carb. Also with the 950 my ET did not change much with the weather, Now it slows down a lot when the temperature goes up. I best at T&T the other night was only a 6.37 @ 108 with a 1.41 60ft.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Lost 60 ft.............
[Re: D-50]
#1843260
06/07/15 03:12 AM
06/07/15 03:12 AM
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Joined: Jan 2003
Posts: 11,728 Portage,michigan
B3422W5
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I Live Here
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Portage,michigan
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At the power you are putting down( based on ET/ MPH) the Dominator is probably too big. I ran his Dominator on a small block that ET'd a little better than you at 400 pounds more weight, and the Dominator didn't run any better than a 1025 race Demon( 4150 style)..... Unfortunately I sold the race Demon.... Should have kept it and sent the Dominator back. You might be able to get it to work, I liked the 4150 manners better street driving it( which I occasionally did( W5 motor)
I just took a 950 off my little 318( car has yet to run like I think it will)... Trick little engine masters mill..... But I put a 750 on it night before last and went for a quick jaunt.... Let's just say I am eagerly looking forward to getting back to the track with it. Think that 950 was flat killing the little motor, we will soon see. Smaller is often better.
Last edited by B3422W5; 06/07/15 03:17 AM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Lost 60 ft.............
[Re: Monte_Smith]
#1843281
06/07/15 09:09 AM
06/07/15 09:09 AM
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Joined: Jan 2003
Posts: 1,784 PA
W5DART66
top fuel
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top fuel
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PA
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My bet is that it is REALLY rich down low............most PS carbs seem to be. That makes it lazy early Yep. Did you put timing in it yet???? It needs 39* 40* on pump gas. And no way is that 1050 to big Don that engine was built around that 1050.
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Re: Lost 60 ft.............
[Re: D-50]
#1843289
06/07/15 10:10 AM
06/07/15 10:10 AM
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Joined: Feb 2005
Posts: 20,201 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,201
PA.
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Are you running a carb spacer? If not trying one may help.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Lost 60 ft.............
[Re: W5DART66]
#1843321
06/07/15 11:27 AM
06/07/15 11:27 AM
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Joined: Jan 2003
Posts: 11,728 Portage,michigan
B3422W5
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I Live Here
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My bet is that it is REALLY rich down low............most PS carbs seem to be. That makes it lazy early Yep. Did you put timing in it yet???? It needs 39* 40* on pump gas. And no way is that 1050 to big Don that engine was built around that 1050. I know this little 318 was run on the engine masters dyno with best results with a 950 on it. I am pretty sure it is going to ET WAY better with a 750 on it. Will know soon. I will have tried both. Isn't the OP's motor a dyno motor as well?
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Lost 60 ft.............
[Re: D-50]
#1843473
06/07/15 03:37 PM
06/07/15 03:37 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
OP
pro stock
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OP
pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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I think it is rich also. At full throttle is seems to run fine but it seems to run a little rough on the return road or when I am cruising along about 2500 rpm. Last year I sent the 1050 back to Pro Systems to rebuild it and I gave them all the info that they ask about motor. I have the sheet with all the specs on the Carb. It has #90 jets in it. I am not a carburetor guy, I have not changed anything on the carb since I got it back. I am sure it needs to be tuned.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Lost 60 ft.............
[Re: D-50]
#1843487
06/07/15 04:07 PM
06/07/15 04:07 PM
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Joined: Jan 2003
Posts: 11,728 Portage,michigan
B3422W5
I Live Here
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I Live Here
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Sounds like same carb I bought from Patrick( I used to work with him years ago before he opened his business) Mine he called an 1100, not a 1050. He likes to put big squirters in his stuff, think mine came with 45's. Worked fine, no bog or hesitation. Mine would also load up at cruise rpm, never played with it other than jetting changes, as I know squat about carbs. This on a 13.3 compression 422 inch motor. Had to constantly put your foot in it to not foul plugs, but at WOT worked perfect....... But no faster and way worse manners than that 4150 style carb. It can probably be tuned with bleeds to run better at part throttle, but I bet it will never ET any better than what you had. Might indeed make a bit more horsepower on a dyno, but not on your time slip.
Last edited by B3422W5; 06/07/15 04:10 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Lost 60 ft.............
[Re: D-50]
#1843498
06/07/15 04:30 PM
06/07/15 04:30 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
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I Live Here
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I guarantee in the RIGHT hands the dommy would be faster and every "custom" carb I`ve worked on so far had horrible idle/transition manners and my dommy is awesome on the street and track and even get decent mileage and that's w/91 pump gas......................
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Lost 60 ft.............
[Re: B3422W5]
#1843510
06/07/15 04:52 PM
06/07/15 04:52 PM
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Joined: Jan 2003
Posts: 1,784 PA
W5DART66
top fuel
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top fuel
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Sounds like same carb I bought from Patrick( I used to work with him years ago before he opened his business) Mine he called an 1100, not a 1050. He likes to put big squirters in his stuff, think mine came with 45's. Worked fine, no bog or hesitation. Mine would also load up at cruise rpm, never played with it other than jetting changes, as I know squat about carbs. This on a 13.3 compression 422 inch motor. Had to constantly put your foot in it to not foul plugs, but at WOT worked perfect....... But no faster and way worse manners than that 4150 style carb. It can probably be tuned with bleeds to run better at part throttle, but I bet it will never ET any better than what you had. Might indeed make a bit more horsepower on a dyno, but not on your time slip. Don it's already faster 2MPH AND .1 tenth The intake built around 1050 so when carb is right it will smoke the 950 but WTF do I know I just built the engine. And AGAIN I ASK WHAT TIMING IS IN IT?? Have you replaced valves spring? When I fixed heads up said one more year on spring. Was that 2 or 3 years ago?
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Re: Lost 60 ft.............
[Re: D-50]
#1843520
06/07/15 05:15 PM
06/07/15 05:15 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
OP
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OP
pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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I have not changed springs and the timing is still 35*. It was 3 yrs ago when you worked on heads. I have not made that many passes on the motor since you worked on the heads ,maybe 50 1/8 mile passes.I upped my shift point the other day just to see if it made any difference (from 6800 to 7200 rpm and it picked up). I figured if the springs were weak it would not have picked up when I raised the shift RPM.I know I need to up the timing. But I figured I need to find out why it lost 60ft. first. I may be wrong. I appreciate all the help. I tried to post the sheet from ProSystems but I could not.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Lost 60 ft.............
[Re: W5DART66]
#1843530
06/07/15 05:25 PM
06/07/15 05:25 PM
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Joined: Jan 2003
Posts: 11,728 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,728
Portage,michigan
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Sounds like same carb I bought from Patrick( I used to work with him years ago before he opened his business) Mine he called an 1100, not a 1050. He likes to put big squirters in his stuff, think mine came with 45's. Worked fine, no bog or hesitation. Mine would also load up at cruise rpm, never played with it other than jetting changes, as I know squat about carbs. This on a 13.3 compression 422 inch motor. Had to constantly put your foot in it to not foul plugs, but at WOT worked perfect....... But no faster and way worse manners than that 4150 style carb. It can probably be tuned with bleeds to run better at part throttle, but I bet it will never ET any better than what you had. Might indeed make a bit more horsepower on a dyno, but not on your time slip. Don it's already faster 2MPH AND .1 tenth The intake built around 1050 so when carb is right it will smoke the 950 but WTF do I know I just built the engine. And AGAIN I ASK WHAT TIMING IS IN IT?? Have you replaced valves spring? When I fixed heads up said one more year on spring. Was that 2 or 3 years ago? Sorry Brett, poster didn't mention the intake was designed to work best with a dominator. The modified intake I bought from you years ago definately DIDNT work better with a dominator than a 4150 carb, I did lots of testing to prove it, and on a motor that makes more power than the OP.... So they don't always ET better. Edit..... I think a 4500 built manifold has advantages, no doubt.
Last edited by B3422W5; 06/07/15 05:36 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Lost 60 ft.............
[Re: D-50]
#1843533
06/07/15 05:28 PM
06/07/15 05:28 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
OP
pro stock
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OP
pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Here is some of the specs on carb. Primary lean-rich Secondary lean-rich Main jet 90 87-94 MJ 90 87-94 Hi air 36 40-30 hi air 36 40-30 Int Air 76 80-55 int air 76 80-55 Int Fuel 40 int fuel 40 Idle air 52 70-40 idle air 52 70-40 Idle feed 35 idle feed 35 PV feed 86 Pv feed X PV PL PV PL
It has 40/40 squirters
I wrote these in columns I do not know why it put it all together.
Last edited by D-50; 06/07/15 05:31 PM.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Lost 60 ft.............
[Re: D-50]
#1843593
06/07/15 06:53 PM
06/07/15 06:53 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Most any Dominator from certain builders, that is specified for a "small block" is going to be WAY rich down low. Why is that you ask.....small motors, big carbs, equal low air speed down low. So to be sure it comes on the brake clean, they tend to put WAY too much fuel in it down low. Does it HAVE to be this way? No, of course not, just needs to be properly tuned. The motor in question obviously needed the Dominator, as with even a poor tune it picked up MPH.......that's power. Now if it slowed in 60ft, that is reflected in the ET, which may not be better, but power is power and more of it will make the ET quicker with a proper tune.
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