Re: Largest 4150 carb?
[Re: Lee446]
#2443870
01/31/18 02:33 AM
01/31/18 02:33 AM
|
Joined: Aug 2003
Posts: 43,277 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,277
Bend,OR USA
|
Thats what provoked my question and what started it all was several years ago when it came out that the Holley HP 950 was closer to 850 cfm. I see carbs rated at 1050 but wonder how many of them really are and that includes Holley. The original Holley # 80496 950 CFM rated didn't flow close to that number, I had several of them flowed, they all flow under 900 CFM I haven't had any of the newer Holley HP flowed but I believe when Quicf Fuel came out with their version of the HP type carbs that did flow as advertised Holley had to keep up The early HP carbs., including the HP950, worked great out of the box, including the replacement HP Dominator carbs. with the smooth tops Not all the Holley race carbs. work great out of the box, same as other brands like Barry Grant, Carters and Edlebrocks
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2443881
01/31/18 03:01 AM
01/31/18 03:01 AM
|
Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
|
master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
|
The “linked ad” is just the summit page. Go to Holleys website. It’s got all the specs.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2443894
01/31/18 03:22 AM
01/31/18 03:22 AM
|
Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
|
super stock
Joined: May 2015
Posts: 1,134
Lost in Time
|
I agree, I was just showing you what worked for me. Bit like said its super carb, ran it on the dyno first and only had to set the floats and adjust the idle.......👍
One more thing, my cam has 274/285 @ 050 duration and with this carb I got a clean idle @ 900 rpm and that's something my 850 could not do.
Have a great day Iowan
"obsolete is neat"
|
|
|
Re: Largest 4150 carb?
[Re: J_BODY]
#2443918
01/31/18 07:26 AM
01/31/18 07:26 AM
|
Joined: Mar 2009
Posts: 2,469 Sydney,Australia
tex013
top fuel
|
top fuel
Joined: Mar 2009
Posts: 2,469
Sydney,Australia
|
interesting in the linked ad for the Holley there is no mention of venturi or throttle plate size. I would think that would make a difference in how much air it would allow to flow. Braswell B-4825 Series carburetor is offered with venturi sizes from 1.40" up through 1.68", and throttle bores of 1.688", 1.750", or 1.790. Mine happens to have a 1.48 venturi/1.79 throttle bore. I don't have a 4500 intake fitted to my W8 so I bought a 4825 to play with in the mean time. Wow , that makes you wonder whether like you one of these may be an easier option than a 4500 carb . Save over adapters or more intakes . What is the ball park $ Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2443959
01/31/18 11:30 AM
01/31/18 11:30 AM
|
Joined: Jul 2010
Posts: 2,422 Pittsburgh PA
Eric
top fuel
|
top fuel
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
|
I ran a 1000cfm AED on the Arrow for years. Last year I had some issues with it and put my old Ray Murray 850 back on....saw no changes other than I was going rounds again lol
5.53 @ 125 1/8th on the launch control..more left in her!
|
|
|
Re: Largest 4150 carb?
[Re: tex013]
#2443970
01/31/18 12:01 PM
01/31/18 12:01 PM
|
Joined: May 2003
Posts: 13,202 aZLiViN
J_BODY
I Live Here
|
I Live Here
Joined: May 2003
Posts: 13,202
aZLiViN
|
interesting in the linked ad for the Holley there is no mention of venturi or throttle plate size. I would think that would make a difference in how much air it would allow to flow. Braswell B-4825 Series carburetor is offered with venturi sizes from 1.40" up through 1.68", and throttle bores of 1.688", 1.750", or 1.790. Mine happens to have a 1.48 venturi/1.79 throttle bore. I don't have a 4500 intake fitted to my W8 so I bought a 4825 to play with in the mean time. Wow , that makes you wonder whether like you one of these may be an easier option than a 4500 carb . Save over adapters or more intakes . What is the ball park $ Tex not sure new.... I picked mine up of Racingjunk. Like I said, I was just looking for something to use as all I had was my BG 750. I should throw that on again one day and see how it runs compared. I only did that once when the combo was brand new. I did put an adapter on it and ran our 4500 1050 on once occasion. Didn't 60 as hard and ran a bit slower due to that. Was an 1/8th mile track though. Maybe top end on a 1/4 track would have shown some improvement. Of course every combo is different. Mines limited by a rather mild camshaft.
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2444034
01/31/18 01:52 PM
01/31/18 01:52 PM
|
Joined: Jan 2003
Posts: 14,513 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,513
So. Burlington, Vt.
|
If you look at the venturi and throttle bore diameter for both a 4500 and 4150 "1050" it will be readily apparent they aren't going to flow the same.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: Largest 4150 carb?
[Re: fast68plymouth]
#2444833
02/01/18 08:24 PM
02/01/18 08:24 PM
|
Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
|
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
|
If you look at the venturi and throttle bore diameter for both a 4500 and 4150 "1050" it will be readily apparent they aren't going to flow the same. Yep. Mr. Smoke meet Mr. Mirrors... they can't BOTH flow 1050 CFM at the same test pressure. At least one big-name racing carburetor builder doesn't even give a CFM rating the last I heard: Braswell. It's all about venturi size, throttle plate size, and booster style. Here's a question for you: Which of the following flows the most? They're ALL 4150 carbs with 1.75" throttle plates. 1. BG Demon RS 1.425 venturi & downleg boosters 2. BG Gold Claw 1.500 venturi & downleg boosters 3. QFT/Proform 1.45 venturi & downleg boosters 4. QFT/Proform 1.52 venturi & downleg boosters 5. QFT/Proform 1.59 venturi & annular boosters 6. Holley Ultra 1.58 venturi & downleg boosters 7. Holley Ultra 1.60 venturi & annular boosters The answer: It doesn't matter.What does matter is which carb works the best on the track with a particular combination... at least, IMO.
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2444848
02/01/18 08:38 PM
02/01/18 08:38 PM
|
Joined: Jan 2003
Posts: 2,094 central texas
krautrock
top fuel
|
top fuel
Joined: Jan 2003
Posts: 2,094
central texas
|
^ i'd guess the 1.58 venturi with downleg booster would flow the most.
but for any motor i'd build i'd probably want 1.45 or 1.52 venturi with annular booster...
Last edited by krautrock; 02/01/18 08:39 PM.
|
|
|
Re: Largest 4150 carb?
[Re: krautrock]
#2444855
02/01/18 08:56 PM
02/01/18 08:56 PM
|
Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
|
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
|
... 1.45 or 1.52 venturi with annular booster... Annulars shouldn't be necessary on a carb with venturi that small. Annular boosters are a bigger obstruction to air flow, which is why most successful applications using annulars that I've seen have been on 1.56" & larger venturi. All those small(er)-venturi annular carbs that Quick Fuel offers make no sense to me...
|
|
|
Re: Largest 4150 carb?
[Re: Lee446]
#2444874
02/01/18 09:34 PM
02/01/18 09:34 PM
|
Joined: Jan 2003
Posts: 14,513 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,513
So. Burlington, Vt.
|
Well, the answer to how many is easy....... 5 or 6........depending if you can get the quickest one to be adequately street friendly or not.
The harder question to answer will be....... Which one or two to keep?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
|
|