Whats the difference ? 4150 question !

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yellow rose said:
Look at this chart very close. The Brawlers are listed on the last page. Then you tell me how you bought a 950.

http://www.quickfueltechnology.com.au/content/Quick Fuel Carb Size with details-AUST.pdf
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Maybe the race series brawler carb, 950cfm, part#BR67202, on sale (save about $60) at summit,$537.26?
He did say he bought a race series.
To gto man, if you believe that it really flows 950( im not sure i do) i think it might be too much for a mild cam, stock head, stock displacement 440. Ported head 500, with a big solid , well......
 
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33IMP said:
Maybe the race series brawler carb, 950cfm, part#BR67202, on sale (save about $60) at summit,$537.26?
He did say he bought a race series.
To gto man, if you believe that it really flows 950( im not sure i do) i think it might be too much for a mild cam, stock head, stock displacement 440. Ported head 500, with a big solid , well......
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You are correct on your part# and I did buy it for that sale price at summit. As for flow gotta be more than the 750, just don't know if any gain will be seen. Its a .030 440 rpm heads not quite stock.
 
The gto 389 said:
Look at what 33imp said and you will see how I bought a 950.
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Ok, I’ll play along. Did you even look at the link I posted? I doubt it. If you bought a QF Brawler 950, you didn’t buy a 950. This is why I say do NOT a buy a carb based on CFM.

Here are the numbers so you don’t have to go look them up. This is according to QF.

1.390 X 1.687 is 750 CFM (BR-67302).
1.390 X 1.750 is 850 CFM (BR-67303).
1.450 X 1.750 is 950 CFM (BR-67304).
1.560 X 1.750 is 850 CFM (BR-67314).

That’s QF’s numbers and the part numbers of the carbs. So you tell me how a .110 smaller diameter venturi flows less than the 1.560 Venturi carb unless it has annular boosters, which it doesn’t. It does appear to have a choke on it, but that can’t count for that huge discrepancy in flow.

Oddly enough, if you actually put any of these carbs on a flow bench and tested them at 20.4 inches of water they would ALL flow well over the rated CFM.

That’s why we need to select a carb based on Venturi and throttle blade diameter rather than CFM. That 1.390 X 1.750 will feed a pretty hot engine and not even sweat it. And the driveablity will be much better than either the 1.450 or 1.560 Venturi and I doubt there is 5 peak HP between the three of them.
 
Thats why i said i didnt believe that 950 cfm. In my humble opinion, anybody that thinks a 4150 can flow anywhere near a dominator is delusional .
 
33IMP said:
Thats why i said i didnt believe that 950 cfm. In my humble opinion, anybody that thinks a 4150 can flow anywhere near a dominator is delusional .
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BLP makes several main bodies that will do it. You also have the twin blade stuff that a lot of guys are having success with.
 
BLP 4150 and a 950 main body.

BLP.JPG
 
Our old 950HP 1.375 x 1.750 billet plated (830cfm) carb pulled 2.0hg@6000 on the dyno, it flows around a calculated 967cfm on our motor in the traps@6200rpm on a 4.565 bore x 4.500 stroke motor, a 1050 dominator w/adapter was also tried on the dyno and made only 3hp more, it pulled .07hg, we have the big 440-2 Indy on it, just as an example, putting even a well tuned 1050 dom on ours would perhaps gain us a 10th and some mph with our current combo, the thinking that all mopars like a big carb is not always true as I thought it was, the whole combo/rpm is what to look at in picking a carb not just engine size. Now if we had 12.5:1, a 750 roller and 5000 stall with 4.56 gears and turned 7500rpm then yes an 1150 dom would be the choice on a 440-3 intake.
 
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yellow rose said:
Ok, I’ll play along. Did you even look at the link I posted? I doubt it. If you bought a QF Brawler 950, you didn’t buy a 950. This is why I say do NOT a buy a carb based on CFM.

Here are the numbers so you don’t have to go look them up. This is according to QF.

1.390 X 1.687 is 750 CFM (BR-67302).
1.390 X 1.750 is 850 CFM (BR-67303).
1.450 X 1.750 is 950 CFM (BR-67304).
1.560 X 1.750 is 850 CFM (BR-67314).

That’s QF’s numbers and the part numbers of the carbs. So you tell me how a .110 smaller diameter venturi flows less than the 1.560 Venturi carb unless it has annular boosters, which it doesn’t. It does appear to have a choke on it, but that can’t count for that huge discrepancy in flow.

Oddly enough, if you actually put any of these carbs on a flow bench and tested them at 20.4 inches of water they would ALL flow well over the rated CFM.

That’s why we need to select a carb based on Venturi and throttle blade diameter rather than CFM. That 1.390 X 1.750 will feed a pretty hot engine and not even sweat it. And the driveablity will be much better than either the 1.450 or 1.560 Venturi and I doubt there is 5 peak HP between the three of them.
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Screenshot_20201222-185224.png
 
33IMP said:
Thats why i said i didnt believe that 950 cfm. In my humble opinion, anybody that thinks a 4150 can flow anywhere near a dominator is delusional .
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No human said the 950 cfm claim was legit. Just showing what I bought at a great price! Man everyone is so uptight and full of themselves on this forum. Thank you everyone for actually answering my only question. Just wondered if anyone had tried that particular carb? Didn't need to be belittled on whether I believed the cfm rating or not. Which I don't . WOW! Have merry Christmas all, and god bless.
 
The gto 389 said:
No human said the 950 cfm claim was legit. Just showing what I bought at a great price! Man everyone is so uptight and full of themselves on this forum. Thank you everyone for actually answering my only question. Just wondered if anyone had tried that particular carb? Didn't need to be belittled on whether I believed the cfm rating or not. Which I don't . WOW! Have merry Christmas all, and god bless.
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Nothing to do with uptight. It has to do with an industry that LIES. I’d have to go back and see what you had, but what you bought is literally an 850. Why they call it a 950 I can’t say.

Your example is why I say do not buy a carb based on CFM.
 
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yellow rose said:
Nothing to do with uptight. It has to do with an indusrty that LIES. I’d have to go back and see what you had, but what you bought is literally an 850. Why they call it a 950 I can’t say.

Your example is why I say do not buy a carb based on CFM.
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Oh I agree. I don't see anything really to give it the 950 rating. Just fun telling the young kids its a 950 instead of an 850
 
PRH said:
What’s the venturi size on that BLP body...... and what size throttle bore is it used on?
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From what I can find it looks like 1.590 and 1.610 venturi are the options with 1.750 throttle bores.

IDK but unless you are using that big venturi on something making over 700 HP it needs an annular booster and that’s coming from a guy who is having to rethink his stand against annular boosters.
 
Interesting discussion this thread has turned into.

Now, what is the formula for determining required approximate venturi size and throttle blade size?
 
Old thread new idea, I am wondering if anyone makes a spacer between the main body & throttle plate. I'd like to make an 850 out of my 830 hp. Then tune it to work for my application, but maybe it won't be enough carb
Goal is low 10.00s ! Engine is 470, trickflow 240s 11.8:1, good oiling system. For now 260-264@.050 howard's sft. 1.6 hs rockers & trickflow intake.
The cam & carb maybe a little small for the goal but eventually I'll go solid roller & see where I'm at with the carb.
Thanks !
Nevermind I found blp makes a spacer.
 
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MOPARMAGA said:
Old thread new idea, I am wondering if anyone makes a spacer between the main body & throttle plate. I'd like to make an 850 out of my 830 hp. Then tune it to work for my application, but maybe it won't be enough carb
Goal is low 10.00s ! Engine is 470, trickflow 240s 11.8:1, good oiling system. For now 260-264@.050 howard's sft. 1.6 hs rockers & trickflow intake.
The cam & carb maybe a little small for the goal but eventually I'll go solid roller & see where I'm at with the carb.
Thanks !
Nevermind I found blp makes a spacer.
Click to expand...

I ran an 800 (4780) main body with a 1.75" (850) base plate for years. It worked well on my .557 cam stock stroke 440 way back when there were no "950" carbs.

If it was me I'd just find a Holley 850 and try that. in my experience QuickFuel and even the newer Holley HP carbs most often take a fair amount of work to get them calibrated to have good WOT AFR and street manners.
 
Jeremiah said:
I ran an 800 (4780) main body with a 1.75" (850) base plate for years. It worked well on my .557 cam stock stroke 440 way back when there were no "950" carbs.

If it was me I'd just find a Holley 850 and try that. in my experience QuickFuel and even the newer Holley HP carbs most often take a fair amount of work to get them calibrated to have good WOT AFR and street manners.
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Thanks, I was looking at Holley's track 850 purple because it's purple lol. I'm more of a do it myself guy. The 830 hp is mostly exact to 850 specs except for 1.75 base plate & the adapter is .700 thick which I think would make better velocity. If this doesn't work I'll build my dominator. My car most likely will see no street use
 
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