|
|
|
12-27-2014, 10:19 PM
|
#1 |
|
Registered User
Join Date: Dec 2014
Location: Euless, Texas
Posts: 516
|
How to select carb?
I have a 72 C10 LWB 350 auto. What is the smallest carb can I get for this PU? This is an occasional driver. Not wanting to race. Had PU for 6 mo. Still working to fix up. Currently is a driver, has a holly 750CFM that I do not like at all. Wanting to know what carb would give me good running and performance.
|
|
|
|
12-27-2014, 10:25 PM
|
#2 |
|
Registered User
Join Date: Nov 2014
Location: Buckeye, Az
Posts: 122
|
Re: How to select carb?
X2 on this help a newbie out
|
|
|
|
|
12-27-2014, 10:31 PM
|
#3 | |
|
Registered User
Join Date: Dec 2011
Location: UTAH
Posts: 353
|
Re: How to select carb?
Quote:
__________________
Mike 1971 C10 350 1969 C20 396 1979 Corvette L-82 |
|
|
|
|
|
12-27-2014, 10:33 PM
|
#4 |
|
Registered User
Join Date: Dec 2014
Location: Euless, Texas
Posts: 516
|
Re: How to select carb?
This carb was on PU when I purchased in July 2014. Does not run as good as I think it should and really sucks gas.
What is X2? |
|
|
|
|
12-27-2014, 10:46 PM
|
#5 |
|
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
|
Re: How to select carb?
A quality rebuilt Q-jet is hard to beat for drivibility. Not talking about a cheap parts store off the shelf "replacement" carb but one done by Cliff Ruggles.
http://www.cliffshighperformance.com/
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
|
|
|
|
12-27-2014, 11:41 PM
|
#6 | |
|
Registered User
Join Date: Apr 2012
Location: Clovis NM
Posts: 30
|
Re: How to select carb?
Quote:
|
|
|
|
|
|
12-28-2014, 12:02 AM
|
#7 |
|
Registered User
 Join Date: Oct 2013
Location: lousiville Ky
Posts: 2,649
|
Re: How to select carb?
Q-jet, that are not trashed or rebuilt by some aftermarket genetic rebuiler are nice carbs. As an alternative, I use QuickFuel hod Rod series built by Scott , an associate of QuickFuel of Bowling Green, KY. They work really well for me.
Good Qjets are getting hard to find, also todays ethanol blended fuels can be hard on them too. IMO, Ethanol has its problems in certain every day driver vehicles. My car has a Qjet, and truck a QuickFuel. Good luck selecting your carb. Les Last edited by aotte1; 12-28-2014 at 12:24 AM. |
|
|
|
|
12-28-2014, 12:55 AM
|
#8 |
|
Registered User
Join Date: Jun 2014
Location: Glendora CA -> Tampa FL
Posts: 587
|
Re: How to select carb?
Maybe you could post in the sell/trade section to trade your 750 for a 600, or at least sell off your 750 to offset the cost and buy a new Edelbrock.
I personally like the 1406 for good fuel economy on a stock or mild SB350. Something like this: http://www.jegs.com/i/Edelbrock/350/1406/10002/-1 Thats not to say there's anything wrong with a well tuned Q-jet, but "well tuned" is probably the operative term.
__________________
1966 C10 Short Fleetside 1988 Sportster, 2008 Street Glide Ken's 1966 C10 build "Red Ale" Follow on Instgram: @cv_performance https://instagram.com/cv_performance Harley Performance Parts: CV Performance (Harley related) Enjoying the ride! Last edited by Kenfuzed; 12-28-2014 at 01:07 AM. |
|
|
|
|
12-27-2014, 11:05 PM
|
#9 | |
|
Registered User
Join Date: Nov 2014
Location: Buckeye, Az
Posts: 122
|
Re: How to select carb?
Quote:
|
|
|
|
|
|
12-27-2014, 11:14 PM
|
#10 |
|
Registered User
Join Date: Sep 2008
Location: Mobile, Al.
Posts: 687
|
Re: How to select carb?
MAC71 is right, a 600 cfm is about right for a 350. That's what I run on my Nova, as long as I don't open up the rear two barrels it does just fine economy wise.
|
|
|
|
|
12-27-2014, 11:19 PM
|
#11 |
|
Registered User
Join Date: Dec 2014
Location: Euless, Texas
Posts: 516
|
Re: How to select carb?
I am just so confused on this. Some say Holley, some say Q-jets, some say Edelbrock. I am wanting one that is not difficult to adjust and is good for cruising around.
|
|
|
|
|
12-27-2014, 11:23 PM
|
#12 | |
|
Registered User
Join Date: Aug 2014
Location: Pittsburgh, PA
Posts: 627
|
Re: How to select carb?
Quote:
|
|
|
|
|
|
12-28-2014, 09:12 AM
|
#13 | |
|
Registered User
Join Date: Nov 2009
Location: Michigan
Posts: 474
|
Re: How to select carb?
Quote:
__________________
Brad handshoe |
|
|
|
|
|
12-28-2014, 09:48 AM
|
#14 |
|
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
|
Re: How to select carb?
I love Q-jets i bought the book on them by cliff haven't finished it great info in what i've read. My dad always built our Q-jets and they ran fine (40+year technician) never a better carb for power and economy. Saying all that if you want simple edelbrock is more for you i rebuilt the one on my wife's 67 (my first carb rebuild ever) to edelbrock specs, and it runs like a fuel injection engine so simple and also a 600cfm works good on my 350's.
__________________
Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
|
|
|
|
|
12-27-2014, 11:25 PM
|
#15 |
|
The Niner
 
Join Date: Nov 2010
Location: Broad Brook, CT
Posts: 2,498
|
Re: How to select carb?
All the brands have their pros and cons, but for a stock 350, anything in the 600 cfm range will be a huge improvement over that 750.
__________________
"A good racer is one whose head is in communication with his balls." - Richie Evans 1970 C/20 - 402/TH400/3.54s - 74K miles 2003 GMC Sierra 2500 - Wheatland Yellow Niner Progression Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=697183 Classic Trucks article: https://www.motortrend.com/features/...et-c20-driven/ |
|
|
|
|
12-28-2014, 01:57 AM
|
#16 |
|
Registered User
Join Date: Oct 2010
Location: Kansas City
Posts: 3,590
|
Re: How to select carb?
My truck had a Quadrajet when I bought it. I had it rebuilt and bought another and had it rebuilt and neither one were right. The guy that works on for me recommended a Holley with electric choke and vacuum secondaries.
I was little skeptical at first as I had always heard you had to constantly mess with a Holly and I don't have the skill or understanding to do that. But I took his advice and could not be happier. This is what I bought. http://www.jegs.com/i/Holley/510/0-80458SA/10002/-1
__________________
Willie Swamp Angel Truckers '72 C10 Highlander  People who blindly follow a GPS end up on television programs on The Weather Channel. Some survive, some don't. 
|
|
|
|
|
12-28-2014, 02:04 AM
|
#17 |
|
Registered User
Join Date: Nov 2012
Location: rosharon, Texas
Posts: 29
|
Re: How to select carb?
You can go to the Holley website and it will ask you a few questions about your motor and direct you to the right cfm for your application
|
|
|
|
|
12-28-2014, 02:05 AM
|
#18 |
|
Carpe manana
  
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,424
|
Re: How to select carb?
My vote - keep it original and go Q-jet. Member Roger Koop has recenty listed some rebuilt Q-jets for a reasonable price.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308  Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland
|
|
|
|
|
12-28-2014, 02:15 AM
|
#19 |
|
Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
|
Re: How to select carb?
I vote Q-Jet as well. The primaries are smaller and you've got on-demand secondaries for the occasional need.
Jeff
__________________
I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
|
|
|
|
12-28-2014, 09:36 AM
|
#20 |
|
Registered User
Join Date: Oct 2013
Location: Oklahoma
Posts: 54
|
Re: How to select carb?
Here is a chart that will help you determine the CFM best suited for your needs.
http://www.4secondsflat.com/Carb_CFM_Calculator.html
__________________
If you think you can... Or think you can`t.. You are right. |
|
|
|
|
12-28-2014, 09:41 AM
|
#21 |
|
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,712
|
Re: How to select carb?
I luv these carb debates!!
For one simple reason!! 99% of the time it's not the carb. It's usually a timing issue. Do the simple things first. Optimize your timing. So the ultimate question is: What's your initial timing? |
|
|
|
|
12-28-2014, 09:46 AM
|
#22 |
|
Registered User
Join Date: Oct 2013
Location: Oklahoma
Posts: 54
|
Re: How to select carb?
You are right. However he did state he has a 750 CFM carb on a 350 engine... Over carbed.
__________________
If you think you can... Or think you can`t.. You are right. |
|
|
|
|
12-28-2014, 10:02 AM
|
#23 | |
|
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,712
|
Re: How to select carb?
Quote:
I ran an 800 dp on a stock cammed 350 that had a streetmaster intake and headers. Optimized the timing first. That carb gave me better mileage and power than the 465 holley off my pop's 440 or the 625 carter I had. It's all in the timing. |
|
|
|
|
|
12-28-2014, 10:14 AM
|
#24 |
|
Registered User
Join Date: Oct 2013
Location: Oklahoma
Posts: 54
|
Re: How to select carb?
Larger CFM carbs have larger jets. Granted they can be rejetted but the fact remains a larger jet will deliver more fuel at a given manifold vacuum creating a rich mixture and poor mileage. You might make some headway by over advancing the timing but keep in mind... Small blocks like total timing of 36* without vacuum advance. Get much away from that point and your torque will suffer greatly.
__________________
If you think you can... Or think you can`t.. You are right. |
|
|
|
|
12-28-2014, 10:46 AM
|
#25 |
|
Registered User
Join Date: Nov 2013
Location: nantucket mass.
Posts: 65
|
Re: How to select carb?
This is not meant to be a hijack thread but how do you tell which carb is on it now and how many cfm it is? I have the same issue here . I want an easy driver that runs smooth and economical Erik
|
|
|
|
 |
| Bookmarks |
|
|
Hybrid Mode
