Re: Is a Demon 850 too much carb for a 383?
[Re: Mr.Yuck]
#178886
12/30/08 04:03 PM
12/30/08 04:03 PM
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Joined: Jan 2003
Posts: 2,673 Northern MN
1E2C
master
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master
Joined: Jan 2003
Posts: 2,673
Northern MN
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Seems I've heard it's easier to overcarb w/ a Holley than a Carter/E-brock, but I won't have a Holley (never been able to make one work well). Anyway, before the flame wars start, my very mild 383 is running well with an 800 AVS on it, so the airflow capability isn't that much different and he's got a whole lot more cam and compression than I do. So... I guess I'm saying I'd think it should be workable. : DISCLAIMER : Remember, this from a guy that cannot make any kind of Holley carb run well, period. Mike
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Re: Is a Demon 850 too much carb for a 383?
[Re: AndyF]
#178889
12/30/08 04:18 PM
12/30/08 04:18 PM
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Joined: Jul 2003
Posts: 4,794 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,794
Holland MI Ottawa
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Smaller carb will need a tweak or two (pump shot, idle misture)- Bigger carbs gonna need some calibrating and trying out. Depends on how much hands on he wants to do.
Keep old mopars alive.
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Re: Is a Demon 850 too much carb for a 383?
[Re: MoparKansas]
#178891
12/30/08 06:04 PM
12/30/08 06:04 PM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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This would be my suggestion... http://cgi.ebay.com/ebaymotors/650CFM-Ho...emZ260331789414If he wants some other holley, that seller is Holley & they have some great buys in their Ebay store... I recently bolted one on my stock 383 in my Challenger, OOTB it ran better then any other carb I'd tried & much better than a Edelbrock 750 that had never eally impressed me though I had improved it considerably from when it was new by fattening the jetting.. I wound up jetting the Holley two steps leaner & upping the secondary squirter two sizes...
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Re: Is a Demon 850 too much carb for a 383?
[Re: MoparKansas]
#178892
12/30/08 06:25 PM
12/30/08 06:25 PM
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Joined: Feb 2004
Posts: 964 Nanaimo, B.C.
GwaiiEagle
Mannix
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Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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I have 2257 Sealed Power pistons that maybe make 9:1 compression in my 30 over 383 with a Performer RPM and 282S cam. The 850DP was bolted on with no tweaks and ran fine. No bog nothing like that, either on the street or at the track. It replaced an Eddy 750 that I really came to hate. If your bro has that kinda squeeze buy him a better intake for his Bday.
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Re: Is a Demon 850 too much carb for a 383?
[Re: MoparKansas]
#178896
12/30/08 10:28 PM
12/30/08 10:28 PM
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Joined: Dec 2003
Posts: 5,314 Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
My brother has 383 that is .030 over, 10.5:1 compression and a 510/292(? - going from memory) hydraulic cam with a stock intake. He can get a decent deal on a Demon 850 carb that is slightly used (about the same price as a new Edelbrock 650). Will that be too much carb for this combo or will he be able to tune it down and make it work?
As said, I think the 850 is too big. I ran a 750 mighty demon on my 440. FWIW, I thought I might be under carbed, so I replaced it with a BIGS 950 hp, and it didn't go any faster.
The key here, is what series of demon are we talking about?
An 850 speed demon on this 383 is a complete waste of time. You will hate it. An 850 mighty demon, will work, but the 750 mighty is a waaayyy better pick
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Re: Is a Demon 850 too much carb for a 383?
[Re: 383man]
#178898
12/31/08 08:16 AM
12/31/08 08:16 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I do agree it can work but a smaller carb would be better on that combo. We run a basic Holley 750 DP on my sons 400 in his Dart and it loves that carb. He tried an 800 DP and a 830 anular DP carb and it was still fastest with the 750. I did do some minor tuning on the 750 but nothing much. It has the best low end with the 750 and has run 11.40's @ 117 with the 750. Unless you are getting it for a very good deal I would try for a 750 DP. Ron
750DP is probably the best all around carb you can get. It will work on a varity of engines. And it can easily be tuned up if performance goes up.
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Re: Is a Demon 850 too much carb for a 383?
[Re: farmington]
#178900
12/31/08 10:42 AM
12/31/08 10:42 AM
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Joined: Jan 2003
Posts: 1,022 Andrews,In. U.S.of A.
67_Satellite
super stock
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super stock
Joined: Jan 2003
Posts: 1,022
Andrews,In. U.S.of A.
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Quote:
Buy the 850 and work a trade for a 750 and an intake manifold.
Are you a decent negotiator, because thats what I immediately thought.Someone out there really "needs" that bigger carb., and will be willing to pay to upgrade. You may score a little extra cash or some parts along the way as well.If it's a deal,and you don't need it today,buy and barter.
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