Quick Fuel 750 SS or Holley Ultra 750
#1108069
11/06/11 01:53 PM
11/06/11 01:53 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Hey guys looking for a new carb for my 360. I bought a pan to carb 360 and it came with a modified chokeless Holley 750 DP and really would prefer something with a choke for easier starts on a street car. Here the specs.. 74 360 bored .030 with milled dome pistons(was told Forged but think there KB Hypers) J heads with nice runner porting and minor bowl work 2.02/1.60 (68cc) 10.07:1 compression Racer Brown Hydraulic cam 238@ .050 and .485 lift (stock rockers) Holley Strip Dominator intake Holley 750 DP with milled choke horn and drilled primarys MP distibutor and Crane Hi-6 Digital ignition Hooker Comp ceramic coated headers All hooked to a Centerforce Dual Friction clutch, iron close ratio A833 4 speed, 8 3/4 with 3.91's with 325/50-15 Drag Radials (28"tall) in a 72 Duster. So what would be a better choice, a Quick Fuel ss-750 or one of the new Holley Ultra 750 DP. And also if Quick Fuel, should I go with down leg or annular boosters. Heres the carbs... http://www.summitracing.com/parts/QFT-SS-750/http://www.summitracing.com/parts/QFT-SS-750-AN/http://www.summitracing.com/parts/HLY-0-76750BK/What do you guys think? The 750 dp on it now is an older carb thats has been rebuilt, runs good but has a little bog when the secondairies open, havent really messed with it too much but would really like a choke here in NJ. Butch
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108070
11/06/11 06:14 PM
11/06/11 06:14 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,446
Indiana
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I run the SS-750-AN on my 340 and I love it. It has all of the adjustability that you will ever need plus annular boosters.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: RemCharger]
#1108073
11/06/11 08:42 PM
11/06/11 08:42 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Thanks, did you guys used down leg or annular style? My neices boyfriend just bought a Quick fuel ss 750 with the downleg boosters for his 350 Nova, and broght it over, very nice looking carb!!!
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108074
11/07/11 06:41 PM
11/07/11 06:41 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Just got off the phone with Quick fuel and they recomended the SS 650 carb, which is a manual secondairy DP. Seems like most guys with worked 340/360's are running 750's. Does a 650 sound right for a 400+ HP motor or should I go with my gut and get the 750 ?
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108077
11/07/11 09:49 PM
11/07/11 09:49 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,446
Indiana
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Giving QF my specs listed below, I wanted the SS-650-AN DP and they talked me into the SS-750-AN DP instead which is actually 735cfm. I am glad they did and I love the throttle response of this DP. You will need to tune it like anything else but everything on it is adjustable. If you order directly from QF, you can choose your anodize colors. Instead of the standard red, I chose the black anodize and it looks great in those colors.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: YO7_A66]
#1108078
11/07/11 10:02 PM
11/07/11 10:02 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Dragula, nice looking carb!!! But out of my price range and really wanting a choke seeing as its gonna be a street car with a trip or 2 to the track.
YO7_A66, your motor looks similar to mine, is yours primarily a street car? Did you find it overly rich or lean out of the box? I know I'll have to do some tweeking with any carb, just want to make sure I get the best starting point. Thanks
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108079
11/07/11 10:19 PM
11/07/11 10:19 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,446
Indiana
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Mine is a street car and the carb came rich on the primaries and IFR's, and the secondaries are now just a touch rich too. After tuning this carb with an O2 sensor, I now see how difficult it would be to sell a carb and have it dialed in correctly out of the box. Mine came stock with 68/82 jetting and .033 IFR's. I am now running 62/80 jetting and .031 IFR's for reference. The electric choke is a nice option along with the adjustable secondary linkage which allows you to adjust the seconds from 1:1, 40% and 60% delay for more tuning.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108080
11/07/11 10:42 PM
11/07/11 10:42 PM
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Joined: May 2004
Posts: 12,478 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,478
Taxes & Virus's R-US, NY
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Quote:
Dragula, nice looking carb!!! But out of my price range and really wanting a choke seeing as its gonna be a street car with a trip or 2 to the track.
YO7_A66, your motor looks similar to mine, is yours primarily a street car? Did you find it overly rich or lean out of the box? I know I'll have to do some tweeking with any carb, just want to make sure I get the best starting point. Thanks
Mine is a street car...Put over 2000 miles on it this year.
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: Dragula]
#1108082
11/08/11 12:07 PM
11/08/11 12:07 PM
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Joined: Feb 2009
Posts: 1,723 Nebraska
70VcodeCoronetRT
top fuel
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top fuel
Joined: Feb 2009
Posts: 1,723
Nebraska
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So how close to an out of the box carb are the QF carbs? I'm not a carb tuning expert. And that scares me away from one of these.
Last edited by 470bee; 11/08/11 12:07 PM.
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 70VcodeCoronetRT]
#1108083
11/08/11 05:47 PM
11/08/11 05:47 PM
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Joined: May 2004
Posts: 12,478 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,478
Taxes & Virus's R-US, NY
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Quote:
So how close to an out of the box carb are the QF carbs? I'm not a carb tuning expert. And that scares me away from one of these.
Mine was right on except for the front squirter. I went up a couple on that, and maybe down a jet or two on the front, that was it.
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 440Satellite]
#1108085
11/09/11 02:00 PM
11/09/11 02:00 PM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,446
Indiana
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Nice job on shopping around for pricing!! Since your setup is similar to mine, please give an update when you have it on and running.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: YO7_A66]
#1108086
11/09/11 08:01 PM
11/09/11 08:01 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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You got it, I wrote down your settings to have something to go off of. Thanks again.
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: Quick Fuel 750 SS or Holley Ultra 750
[Re: 65 DODGE POST]
#1108088
11/27/12 10:37 AM
11/27/12 10:37 AM
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Joined: Jan 2003
Posts: 5,446 Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,446
Indiana
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""Are your heads ported? I see you had to jet down to 62 in the front? seems like a lot""
I finished the season with 63's in the primary (.039 HSAB's) and 78 (driver) and 76 (passenger) side secondary jetting (.036 HSAB's). Mine came stock with 68's on the primary & 82's on the secondary (.033 HSAB's all around) which were WAY TOO RICH for my setup. I had black smoke right out of the box.
Looking back over the last 2 years with my O2 sensors, I think that the biggest tuning change on this carb was the combination of the jetting and the HSAB changes. Once I leaned these out, my A/F numbers started looking good.
Note: My heads were only bowl blended.
How soon will you have the carb running on the engine?
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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