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Author
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Topic: whats the correct size carb for a 306 hci
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moeofit32
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Member # 10393
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posted
 
 
carb im running is too much and i wanna grab the correct piece of equipment my car is running rich as hell
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95 stroked and blown cobra
Posts: 2387 | From: antioch ca | Registered: Oct 2010
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wilit
Mustang Messiah
Member # 3367
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posted
More details. Compression ratio, cam, transmission, gear ratio, etc? What carb do you have on there now?
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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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moeofit32
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Member # 10393
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posted
i wanna say stock compression or near stock, anderson n-71,edelbrock air gap intake,trick flow 170s,4sp srod currently but will be a 5sp t5 soon,373s...the current carb is unknown the owner built the carb he owned a carb shop....carb was setup to do a nice shot of nos but i dont want to.
[ 2014-05-20, 09:55 PM: Message edited by: moeofit32 ]
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95 stroked and blown cobra
Posts: 2387 | From: antioch ca | Registered: Oct 2010
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racsirx
CAFords OG
Member # 1710
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posted
Here is the guy who built it and it was setup for a 250 shot and yes he owns the famous woolly mammoth vega, you should give him a call
http://www.norcal1320.com/forums/showthread.php?t=1191203783
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88 Saleen #564
88 GT 331 NOVI2000
88 Coupe TURBO 9.75@142
95 Cobra R #75-SOLD
06 F250
13 BMW AH3
17 GT350 #5556
GOD'S NOT DEAD
Posts: 20750 | From: Concord & Pittsburg, CA | Registered: Aug 2002
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5.0 LsX
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Member # 10017
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posted
good rule of thumb->
cubic inch x max rpm / 3456 = recommended carb cfm
so I would say a 550-600 cfm carb would be the best place to start
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91' Notch
Posts: 1260 | Registered: May 2010
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ItzStock
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Member # 9665
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I would run a 650 holley double pumper with that setup.
Posts: 1394 | From: Vallejo, Ca | Registered: Dec 2009
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Duncan Motors
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Member # 7045
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posted
650, 700 maybe if it was all out drag car. dont ever go to small on a carb, they can be down sized always but not upsized. a tuner or my tuner i talked about will have u squared up no problem.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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warhorse58gt
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Member # 7702
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posted
The 650cfm 4150 will be just fine. Max I'd go is 700cfm.
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WOLFPACK RACING
With guns, we are 'citizens'. Without them, we are 'subjects'.
83gt 354ci sbf 9.40 @ 143
77 cobra 2 171ci 97hp of pure fury!
Posts: 4200 | From: 209 | Registered: Jun 2007
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Secnd2nun64
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Member # 1431
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posted
600 or 650 Holley with mechanical secondaries
Posts: 1460 | From: CA | Registered: Jun 2002
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Blow_U_In_Reverse
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Member # 12298
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posted
a Holley 670 street avenger would be great with that setup!
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"Real Men Get BLOWN"
-1993 Cobra "COBRUUH"
-1984 T-Top Notchback
#KurganTuned
Posts: 2688 | From: FiJi-925-650 | Registered: Aug 2012
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Tom Renzo
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Member # 13165
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posted
@ 5.0 LSX. You are correct in my book as because when i was doing work for Chevrolet we used 1.6-1.7 CFM per HP and that comes out to your numbers exactly. So a good starting point is 1.6- 1.7 CFM per HP and 10% either way. Remember a hungry dog always comes to the chow line first. Good job my friend
[ 2014-05-21, 03:58 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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kingdavid
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Member # 11179
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posted
I ran a QFT 650 on my 306 it ran great.
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1967 mustang 410W
2014 Oxford White 5.0
Posts: 305 | From: Sacramento | Registered: Aug 2011
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Tom Renzo
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Member # 13165
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posted
That is text book sizing and you got good results. Good job!!
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Mr.10psi
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Member # 11062
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posted
600 cfm carb is what i would run. Max 650. Same goes for the mechanical secondaries.
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02 white saleen(sold) 347 stroker in the works
Posts: 1337 | From: 530 | Registered: Jul 2011
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Duncan Motors
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Member # 7045
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posted
what carb is on there now? holley edelbrock su, mikuni, quadrajunk,motorcraft,predator, qf, demon,?????????
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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moeofit32
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Member # 10393
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posted
I talked to the guy that built the carb its a holley 650 that he modded....the buikder is gonna actually help me get this piece dialed in
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95 stroked and blown cobra
Posts: 2387 | From: antioch ca | Registered: Oct 2010
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Tom Renzo
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Member # 13165
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posted
Nothing wrong with a Quadro Jet Dunkin. I ran one for years and it was pretty impressive. They run when set up correctly.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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warhorse58gt
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Member # 7702
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posted
quote:
Originally posted by Tom Renzo:
Nothing wrong with a Quadro Jet Dunkin. I ran one for years and it was pretty impressive. They run when set up correctly.
They are hit or miss.. They either run great, or like total shit. And once your great carb has a problem. They never run right again.
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WOLFPACK RACING
With guns, we are 'citizens'. Without them, we are 'subjects'.
83gt 354ci sbf 9.40 @ 143
77 cobra 2 171ci 97hp of pure fury!
Posts: 4200 | From: 209 | Registered: Jun 2007
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Duncan Motors
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Member # 7045
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posted
ive tried to rebuild one and yeah thats why i hate them lol my knowledge is thin an i know it but blame it on a quadrajunk lol, but yeah when they run they run great, till it needs a rebuild
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Tom Renzo
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Member # 13165
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posted
No different than any other carb. The Q JET is one of the best carbs on the market in my view. And like i said i ran one for years. As far as rebuilding them they are a piece of cake depending on your knowledge of the carb. The QJ is very reliable and most certainly a performance unit. Reason people do not like them is because they do not know how to tune them and set them up correctly. The small primaries provided good emissions and throttle response and tyhe large secondaries provided great HP [potential. Built in the largest flow rate of 800 CFM'S the carb had mechanical secondaries a center mount float system that was crucial to its great performance and its ability to be tuned quite simply. frankly you have to look high and far to beat a QJ for economy emissions and performance.
[ 2014-05-31, 03:57 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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warhorse58gt
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Member # 7702
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posted
quote:
Originally posted by Tom Renzo:
No different than any other carb. The Q JET is one of the best carbs on the market in my view. And like i said i ran one for years. As far as rebuilding them they are a piece of cake depending on your knowledge of the carb. The QJ is very reliable and most certainly a performance unit. Reason people do not like them is because they do not know how to tune them and set them up correctly. The small primaries provided good emissions and throttle response and tyhe large secondaries provided great HP [potential. Built in the largest flow rate of 800 CFM'S the carb had mechanical secondaries a center mount float system that was crucial to its great performance and its ability to be tuned quite simply. frankly you have to look high and far to beat a QJ for economy emissions and performance.
Lol 25+ year of messing with carbs... I think I know what I'm doing. Called Qjunks for a reason... Spread bore carbs are a go between. Not the greatest for emissions, nor for pure performance. I've seen better emissions out of a vac secondary, and everyone has seen better performance out of "double pumper" style carbs. So please don't piss on my shoe and tell me it's raining..
[ 2014-06-01, 10:58 AM: Message edited by: warhorse58gt ]
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WOLFPACK RACING
With guns, we are 'citizens'. Without them, we are 'subjects'.
83gt 354ci sbf 9.40 @ 143
77 cobra 2 171ci 97hp of pure fury!
Posts: 4200 | From: 209 | Registered: Jun 2007
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Tom Renzo
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Member # 13165
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posted
Nope pissed on a lot of cars running other carbs in my class. But if you believe the QJ is junk clearly you are pissing on someones leg claiming you are an expert. As for the emission aspect the QJ is exactly why GM used it and it proved very effective. Well so be it and that is that i guess. Difference of opinion.
[ 2014-06-01, 03:51 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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MaK_1967v8
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Member # 12187
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posted
cant go wrong with an edelbrock 600
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1967 C Code Coupe
2004 Roush Stage 2
Posts: 620 | From: Sacramento, CA | Registered: Jul 2012
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warhorse58gt
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Member # 7702
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posted
quote:
Originally posted by Tom Renzo:
Nope pissed on a lot of cars running other carbs in my class. But if you believe the QJ is junk clearly you are pissing on someones leg claiming you are an expert. As for the emission aspect the QJ is exactly why GM used it and it proved very effective. Well so be it and that is that i guess. Difference of opinion.
Never have I every claim to be any kind of expert.. But Again.. In 25 years of playing with carbs. You get to know which ones are really worth a shit.. Hell I still run a carb to this day... So please.. Spare me.
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WOLFPACK RACING
With guns, we are 'citizens'. Without them, we are 'subjects'.
83gt 354ci sbf 9.40 @ 143
77 cobra 2 171ci 97hp of pure fury!
Posts: 4200 | From: 209 | Registered: Jun 2007
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