Re: Anybody run a 1050 4150?
[Re: viperblue72]
#2347358
08/02/17 03:34 PM
08/02/17 03:34 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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My fixture flows carb bodies one barrel at a time..... Which isn't really correct either........ But unless you have a 1200cfm bench...... You do what ya gotta do.
For an approximate wet flow number, I take the dry flow and use .92 of that.
Flowing one barrel at a time, and using the 92% number, an original Holley HP950 (1.375 x 1.750) flows about 860cfm. Traditional Holley 650's, 750's, 850's(with the chokes) come out pretty close to their respective ratings when tested that way. The same cannot be said for most of what I'll call the "new design" carbs.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Anybody run a 1050 4150?
[Re: BradH]
#2347390
08/02/17 04:42 PM
08/02/17 04:42 PM
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Joined: May 2004
Posts: 12,478 Taxes & Virus's R-US, NY
Dragula
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... Do not do annular 1050 4150. Based on what opinion or experiences? The guy that bought my PS1000 had an annular carb on his. Mine was over a 1/10 quicker. He wouldn't give it back after testing it. The annular is on my shelf here if your interested in it...it's a nice QF...
Last edited by Dragula; 08/02/17 04:56 PM.
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Re: Anybody run a 1050 4150?
[Re: Dragula]
#2347406
08/02/17 05:28 PM
08/02/17 05:28 PM
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Joined: Jan 2003
Posts: 31,203 Oregon
AndyF
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... Do not do annular 1050 4150. Based on what opinion or experiences? The guy that bought my PS1000 had an annular carb on his. Mine was over a 1/10 quicker. He wouldn't give it back after testing it. The annular is on my shelf here if your interested in it...it's a nice QF... One data point from some guy with a car that went faster when changing carbs isn't very convincing argument. The annular boosters will pick up a lot of low end torque in a big carb. Your buddy might have lost torque by switching to your carb and since his chassis wasn't very good he ended up going faster.
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Re: Anybody run a 1050 4150?
[Re: AndyF]
#2347579
08/02/17 11:24 PM
08/02/17 11:24 PM
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Joined: May 2004
Posts: 12,478 Taxes & Virus's R-US, NY
Dragula
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... Do not do annular 1050 4150. Based on what opinion or experiences? The guy that bought my PS1000 had an annular carb on his. Mine was over a 1/10 quicker. He wouldn't give it back after testing it. The annular is on my shelf here if your interested in it...it's a nice QF... One data point from some guy with a car that went faster when changing carbs isn't very convincing argument. The annular boosters will pick up a lot of low end torque in a big carb. Your buddy might have lost torque by switching to your carb and since his chassis wasn't very good he ended up going faster. Low end is what he was lacking....If you only have 30cc pumps, you will not catch my PS1000....I had a pair of 50cc pumps and #45 squirters front and rear. He went faster everywhere with mine. MPH picked up, 60ft picked up a bunch, and midrange picked up. Once he bolted mine on, he ended up with traction problems! 60ft went from a 1.58 to a spinning 1.51...He bought new slicks, and he is almost in the 1.49's now..And we are in the heat of the season. So that is my data point, but we know why that carb worked, and I would buy another with my jetting in a heart beat. We tested it on three engines, it was always the fastest carb.
Last edited by Dragula; 08/02/17 11:27 PM.
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Re: Anybody run a 1050 4150?
[Re: clonestocker]
#2347615
08/03/17 12:06 AM
08/03/17 12:06 AM
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Joined: May 2003
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J_BODY
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I run a 4150 style carb since I don't have intake gaskets for my 4500 intake.... and I don't want to ruin the ones that are presently on it. Have plenty of fun going 9.4's 9.5's.... CLASSIC Jay well to be honest... I don't think the 4500 I have will perform as well as the carb in use. I put an adapter on my 4150 intake and ran our dominator and it actually slowed at Barona. ALSO... the 4500 intake I have was welded up and adapted with not much porting in the plenum area and the port size shape is still that of the craftsman based mill it came off. I will play with it as is with a port match one day. Until then....we'll continue with what we got.
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Re: Anybody run a 1050 4150?
[Re: J_BODY]
#2347645
08/03/17 12:30 AM
08/03/17 12:30 AM
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Joined: Jul 2004
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Thumperdart
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I run a 4150 style carb since I don't have intake gaskets for my 4500 intake.... and I don't want to ruin the ones that are presently on it. Have plenty of fun going 9.4's 9.5's.... CLASSIC Jay well to be honest... I don't think the 4500 I have will perform as well as the carb in use. I put an adapter on my 4150 intake and ran our dominator and it actually slowed at Barona. ALSO... the 4500 intake I have was welded up and adapted with not much porting in the plenum area and the port size shape is still that of the craftsman based mill it came off. I will play with it as is with a port match one day. Until then....we'll continue with what we got. Totally agree, because the best tuned carb on a manifold that is less than desirable in terms of efficiency can be and is slower as you found out......
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: Anybody run a 1050 4150?
[Re: fast68plymouth]
#2347691
08/03/17 02:36 AM
08/03/17 02:36 AM
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Joined: Mar 2013
Posts: 571 Spring Hill Fl
65Fury440
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mopar
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Running huge carbs seems to be all the rage these days, so I won't even try and talk you out of it.
I'll just say that my one experience with one...... A qft-q1050......On a roller cammed, Indy headed 572....... was good. It made a few more hp than a Mighty Demon 850. A few like 3 or 30? It was about 5hp. .028" in Venturi diameter is only going to get you so much. Thanks for the reply. I have a Mighty Demon 850 anuular. (Throttle Bore 1.75 inch Venturii Size 1.560 inch) The 337 manifold is ported, no room for a 4500 adapter. Doesn't seem worth the time or expense to pick up 5 hp.
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Re: Anybody run a 1050 4150?
[Re: AndyF]
#2347844
08/03/17 01:29 PM
08/03/17 01:29 PM
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Joined: Jul 2004
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Thumperdart
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On my 470 the QF 1050-AN (annular boosters) worked much better than the Holley 850 and 950 that I tried. The 950 was converted to annular boosters which improved it significantly, but the QF 1050 was still the best carb.
However, this is just dyno testing where we run the engine from 5000 to 7000. The carbs could behave differently on the street or the track. On the dyno we don't really have a way to test "driveability" issues. My point finally strikes gold............. a 5000-7000 dyno pull in no way even touches on street drive-ability or low speed manners just like the one you sold Brad I tested. Couldn't even do a burnout no joke but after working the idle, transition and cruise, it's drive able.......And personally hearing about 4150's on Big blocks especially making even 500+ deserves a Dommy especially a 572 like someone mentioned..........CRAZY and leaving a LOT on the table no matter what you heard or read..........PROVEN every day........
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: Anybody run a 1050 4150?
[Re: 65Fury440]
#2347857
08/03/17 01:47 PM
08/03/17 01:47 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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Running huge carbs seems to be all the rage these days, so I won't even try and talk you out of it.
I'll just say that my one experience with one...... A qft-q1050......On a roller cammed, Indy headed 572....... was good. It made a few more hp than a Mighty Demon 850. A few like 3 or 30? It was about 5hp. .028" in Venturi diameter is only going to get you so much. Thanks for the reply. I have a Mighty Demon 850 anuular. (Throttle Bore 1.75 inch Venturii Size 1.560 inch) The 337 manifold is ported, no room for a 4500 adapter. Doesn't seem worth the time or expense to pick up 5 hp. My test was downleg vs downleg. And, fwiw...... I've been testing for, and sorting out driveability issues on the dyno for 27 years. The dyno can be used for a lot more that wot testing.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Anybody run a 1050 4150?
[Re: viperblue72]
#2347898
08/03/17 02:43 PM
08/03/17 02:43 PM
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Joined: Aug 2011
Posts: 2,905 Pattison Texas
CSK
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I went from Holley 1.563 w/down leg, to 1050 AN , drivability is much better, my engine combo likes it.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Anybody run a 1050 4150?
[Re: viperblue72]
#2348612
08/04/17 07:46 PM
08/04/17 07:46 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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The "1025" sleeves were 1.562 as I recall..... The black ones.
In that venturi/throttle bore combo(1.562 x1.750) .....If it was a Race Demon RS it was a "1025", as a Race Demon w/o removable sleeves it was a "1000", and if it was a Mighty Demon it was an "850".
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Anybody run a 1050 4150?
[Re: fast68plymouth]
#2348640
08/04/17 08:32 PM
08/04/17 08:32 PM
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Joined: Mar 2006
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Hemi Allstate
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I have a Race Demon RS 950 Annular that I converted to a 1050 down leg. Drives fine on the street and ran my best times. I have switched to a Gen 3 Dominator and the test results are not in yet. The new carb was not zeroed in yet.And I haven't been back out to test it . The engine is a 572" Hemi. Mark
1996 Ram 1500 Sport 1968 road runner 1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Re: Anybody run a 1050 4150?
[Re: viperblue72]
#2348685
08/04/17 10:02 PM
08/04/17 10:02 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
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It's been years since I flowed any of those things, but to the best of my recollection.... They were about 920-930cfm.
The annular boosters were 20-25cfm less.
I had also bought some of the largest sleeves..... I think they might have been 1.590(?).... Silver color iirc...... And they didn't increase the flow at all.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Anybody run a 1050 4150?
[Re: fast68plymouth]
#2348687
08/04/17 10:09 PM
08/04/17 10:09 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
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The "1025" sleeves were 1.562 as I recall..... The black ones.
In that venturi/throttle bore combo(1.562 x1.750) .....If it was a Race Demon RS it was a "1025", as a Race Demon w/o removable sleeves it was a "1000", and if it was a Mighty Demon it was an "850". Yep, the 1.562" venturi was the "1025"; still have my black sleeves. Re the advertised size differences... I figure BG felt if you didn't pay the extra $$$, you didn't deserve the extra CFM!
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