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08-10-2004, 07:52 AM
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#1 |
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YA YA
Join Date: Aug 2004
Location: Rockledge, Fl
Posts: 1,273
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Need help - What size carb to go with?
I currently have a 2bbl carb set up on my 71 350, it runs out nicely but seems to be sluggish on take off - I want to change the carb over to a 4bbl setup for better power/throttle response but not sure what size to go with. I want the truck to have nice throttle response and haul ass but I'm not trying to build a racer. I'm thinking a 600 to 650CFM. Gimmi some opinions please.
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08-10-2004, 07:57 AM
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#2 |
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Watch out for your cornhole !
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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600 cfm and make sure it has vacuum secondaries.
__________________
I'm on the Instagram- @Gearhead_Kevin |
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08-10-2004, 08:06 AM
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#3 |
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YA YA
Join Date: Aug 2004
Location: Rockledge, Fl
Posts: 1,273
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Thanks! Also, the current carb is a manual choke - what's involved in changing it over to an electric and should I change it or just leave it manual?
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08-10-2004, 08:08 AM
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#4 |
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YA YA
Join Date: Aug 2004
Location: Rockledge, Fl
Posts: 1,273
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I would assume that it just needs power that's controlled by the eginition switch.
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08-10-2004, 08:30 AM
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#5 |
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Registered User
Join Date: Apr 2003
Location: NB
Posts: 3,367
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Manual Chokes are great just leave it!
Then you control the helm! Cheers
__________________
1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD |
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08-10-2004, 11:47 AM
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#6 |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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I only do electric chokes myself. A switched power wire is all it takes.
By the way, when I said vacuum secondary, lots of folks think only of Holley, but all Carter, Edelbrock, and Rochester 4 bbl are vacuum secondary.
__________________
I'm on the Instagram- @Gearhead_Kevin |
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08-10-2004, 02:00 PM
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#7 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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sounds more like a timing/tuneup issue you have .
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-10-2004, 02:41 PM
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#8 |
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YA YA
Join Date: Aug 2004
Location: Rockledge, Fl
Posts: 1,273
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Figured that mostly likely had a lot to do with it as well - I'll be changing the wires, plugs, cap, and rotor this weekend. I know what the timing is but don't have a timing light or know how to use one if I had one. Hopefully one of the guys I work with can help me out on that one. Anything I need to change besides what I mentioned?
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08-10-2004, 03:45 PM
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#9 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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if you still have the original distributor you should change the points and condensor
and changing to a 4barrell usually means changing the manifold and to do that requires removing and reinstalling the distributor. a timing light and dwellmeter is pretty much required
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-10-2004, 06:08 PM
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#10 |
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Old Skool Club
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Edelbrock Performer and Edelbrock Q-Jet. It's what I have and I like it.
__________________
Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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