Re: Holley Carb delima build on old or buy something else?
[Re: 440charger500]
#375040
07/14/09 02:53 PM
07/14/09 02:53 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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The carb is definatly holding you back some, but isnt costing you as much as you think. What do you have for a fuel system now? It could be running out of fuel on topend, which might tend to fool you thinking its the carb. It would be nice to monitor fuel pressure down the track. Also have you double check total timing etc? I would make sure it was getting plenty of fuel, and the correct timing above 3500RPMS before I spent some money only to find out it doesnt help any. When Time to upgrade, just pickup one of those $100 ProForm main bodies, and use your old baseplate/linkage, and bowls/metering blocks. Those are very nice and well worth the money.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Holley Carb delima build on old or buy something else?
[Re: Bob_Coomer]
#375041
07/14/09 03:04 PM
07/14/09 03:04 PM
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Joined: Jan 2003
Posts: 9,982 Ansonia, CT
CJK440
master
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master
Joined: Jan 2003
Posts: 9,982
Ansonia, CT
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Looks like he already has a proform 750 body which I think is supposed to flow 800+ because it has no choke horn.
2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"
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Re: Holley Carb delima build on old or buy something else?
[Re: Bob_Coomer]
#375042
07/14/09 03:56 PM
07/14/09 03:56 PM
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Joined: Jul 2009
Posts: 237 Redding,CA USA
440charger500
OP
enthusiast
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OP
enthusiast
Joined: Jul 2009
Posts: 237
Redding,CA USA
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My fuel system is a new factory tank with new 3/8 fuel line and a carter hp pump. I have a holley adj fuel regulator set a 6 psi. I'm wondering about the base plate. The carb was a stock 650dp before I installed the proform 750 bodie. I'm thinking maybe I could just add a billet base plate with larger venturies, that should make the carb larger right?
I'm on a slight budget also. So I trying to figure out what might help the most for my money.
Last edited by 440charger500; 07/14/09 03:59 PM.
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Re: Holley Carb delima build on old or buy something else?
[Re: 440charger500]
#375043
07/14/09 03:58 PM
07/14/09 03:58 PM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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A carb spacer could help determine if a bigger carb might help. The extra plenum makes the carb apear bigger to the engine by buffering and smoothing out the pulses some.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Holley Carb delima build on old or buy something else?
[Re: 440charger500]
#375050
07/14/09 08:50 PM
07/14/09 08:50 PM
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Joined: Feb 2005
Posts: 4,318 Prospect, PA
BSB67
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master
Joined: Feb 2005
Posts: 4,318
Prospect, PA
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Quote:
Ok how about I give the engine set up: 440 .40 over KB pistons -3.5 cc dome 10.25 to 10.5 compression Ported 906 heads stock valve size Isky 1.5 iron rockers bushed w/stainless shafts RPM intake gasket matched Thorly 1 7/8 headers Comp 285HL cam
The car is set up with: 3800 Dynamics converter 8 3/4 3.91 gears pinion snubber 90/10's front /Rear Mopar drag shocks ESPO Extra heavy duty springs Ya and the car is heavy @ 4000w/driver
For what you have, the hp (i.e. mph) seems off. As others have said - first check the fuel pressure all of the way down the track.
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Re: Holley Carb delima build on old or buy something else?
[Re: 440charger500]
#375052
07/14/09 09:26 PM
07/14/09 09:26 PM
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Joined: Jul 2005
Posts: 1,472 Overland Park, KS.
Joshs68
pro stock
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pro stock
Joined: Jul 2005
Posts: 1,472
Overland Park, KS.
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My I rebuilt a carb for my charger, I had the cost of the old carb, the cost of the rebuild kit , all my time in the process. I tried a Bigs 950 new and setup for my car, WOW is all I can say, I have almost even money in the two carbs, but I wish I would have just gone this route in the first place. shop around , deals are out there.
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Re: Holley Carb delima build on old or buy something else?
[Re: 440charger500]
#375055
07/15/09 11:54 AM
07/15/09 11:54 AM
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Joined: Nov 2004
Posts: 2,825 Sk. Canada
RemCharger
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
I'll have to get another fuel gauge to rig up so I can see it going down the track. The engine only had about 150 miles on it so I didnt push it hard. I shifted @5500 rpm. I think there is another race in 2 weeks, off to the summit catalog.
I think theres more in it with more rpm...but that might lead to a single plane intake and I don't want to offend the RPM guys out there....
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