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Author
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Topic: what carb to get
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66 AC COBRA
Nitrous King
Member # 904
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posted
 
 
well i have been putting together a car for a while and was going efi, but i cant afford the standalone i want right now, so i am going to use a carb for a while
427w, big solid roller, afr 205's, estimated at 600+fwhp with proper carb/efi system
it is vey comparable to the 418 MM&FF tested in the january issue
what size carb should i use, this will be a street driven track car, not by any means a daily driver, just cruise about 50 miles a weekend to the races, maybe in town once or twice a month, then it will see track duty
what kind of carb should i get, holley demon
i am thinkin around a 850, to get good power and decent street manners
if i get a new carb the hooley street avenger 870 was lookin good, only $400 from summit, and it should be enough, i know it would not be as good as a demon but demon's are expensive
also what is the power limit on a 750 holley carb, because i can get one real cheap from a friend, i know it would be enough but would it do
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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JohnB
Tech Moderator
Member # 969
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posted
A 750 Vac Sec (properly jetted and spring'd) should be good for a "street" car application. 850's and up tend to load up considerably, unless you've got the cubes to warrant it. I ran bigblocks for a number of years, most all were street driven at one time and had 750 vc's on them.
If you have a carb that just needs a lil TLC, lemme know. I still have a few folks that do them at a fraction of the cost of a new Demon or BG. My last was a 850 DP flowed/ported to a 925! ![[Eek!]](eek.gif)
Man, do I miss my bigblock Dart.. ![[Frown]](frown.gif)
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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mustanggt5091
All I need is.....
Member # 444
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posted
Eric, We still have J's Holley 750 vacuuom secondary carb, let you use it since you are letting me use your spyder!
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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Bounty Hunter
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Member # 1422
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posted
I have a nice 750 holley that was built by the Carb Shop, would be perfect for that set up you have, I will let it go cheap if your interested.
Posts: 257 | From: All over | Registered: Jun 2002
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chosen1
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Member # 1906
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posted
I just bought this carb this morning. I think this will work perfect for your setup. I bought it because it has annular boosters.
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1967 Fastback. Should go 10's -but doesn't
1993 Cobra
2003 Suzuki SVS
1966 Coupe -For Sale
Posts: 2205 | Registered: Sep 2002
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Bounty Hunter
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Member # 1422
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posted
unless you have some high flow yates heads a 750 will be plenty! Anything higher is over kill.
Posts: 257 | From: All over | Registered: Jun 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
quote:
Originally posted by Bounty Hunter:
I have a nice 750 holley that was built by the Carb Shop, would be perfect for that set up you have, I will let it go cheap if your interested.
i am very interested in this
how much power were u making when u had this on ur car, and what was ur setup
my heads flow about 310 @ .650
pm sent
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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66 AC COBRA
Nitrous King
Member # 904
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posted
i guess i am also trying to take the motor to 7000k plus, so the carb has to be able to handle that
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Wolfie351
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Member # 651
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posted
(427ci X 7000 rpm)/3456 = 864cfm
(427ci X 6000 rpm)/3456 = 742cfm
If you're absolutely positive you have a motor that will be able to pull to 7000rpm, I'd say go for the 870 street avenger. If you don't have the supporting cast, 770 street avenger would be in order. My 670 has been flawless on my 351w.
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1985 Mustang GT: 351W, Griggs, Baer, etc etc
Posts: 1214 | From: South Bay | Registered: Dec 2001
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66 AC COBRA
Nitrous King
Member # 904
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posted
my cam is suppose to shift at 7200-7300 according to the builder of it, ed at fti
and yes i have the supporting cast, because it has gone that high efi with a tweecer
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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z ya
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Member # 1327
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posted
I would go with the Holley 950HP. Actual cfm rating is 830cfm. This carb kicks ass right out of the box. I would go Holley either way cause in the pits finding Demon parts is next to impossible.
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03 Yukon 6" RCD/welds/MTR's
69 Camaro
72 Commando/500 caddy/39.5 Boggers
96 Dodge Cummins/2" Procomp/35's
Posts: 414 | From: stockton,ca | Registered: May 2002
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HaulinAss Motorsports
Its a STREETRaceCar!
Member # 541
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posted
quote:
Originally posted by Bounty Hunter:
I have a nice 750 holley that was built by the Carb Shop, would be perfect for that set up you have, I will let it go cheap if your interested.
I would go with this carb.It will work perfect for your application....
Posts: 22494 | From: Sacramento | Registered: Nov 2001
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HaulinAss Motorsports
Its a STREETRaceCar!
Member # 541
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posted
quote:
Originally posted by z ya:
I would go with the Holley 950HP. Actual cfm rating is 830cfm. This carb kicks ass right out of the box. I would go Holley either way cause in the pits finding Demon parts is next to impossible.
Unfortunatly they stopped the production of the 950HP.It was an excellent design.I gather there wasnt enough call for it so they discontinued it.Also check into your rating numbers of the HP seris carbs as they are off.The HP seris carbs flow more than the "advertised" ratings .I have a 1050 HP dominator and the "actual" flow rating is higher than the advertised rating ![[Wink]](wink.gif) The HP seris carbs were built mainly because of all the companies that were taking box stock Holleys and doing all their work and making a shit load of money doing so.So they(Holley) decided to make their own line of badass carbs.And,I must agree that the HP seris is the shit.My box stock HP 1050 is performing just as good as a 1200.00 Prosystems carb claims.
Posts: 22494 | From: Sacramento | Registered: Nov 2001
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wilit
Mustang Messiah
Member # 3367
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posted
You need four Weber 45 Downdraughts. Hmmmmmm.... Nothing like the sound of 7 litre breathing though Webers.
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"If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
quote:
Originally posted by HaulnAssMaro:
quote:
Originally posted by Bounty Hunter:
I have a nice 750 holley that was built by the Carb Shop, would be perfect for that set up you have, I will let it go cheap if your interested.
I would go with this carb.It will work perfect for your application....
i bought his carb on thursday ![[worship]](graemlins/worship.gif)
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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