Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford Inline Six, 200, 250, 4.9L / 300
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #16 (permalink)  
Old 11-25-2009, 09:10 AM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,285
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
High-speed pullover/air-bleed system - enriches the fuel mixture at high RPMs.

Idle-speed temperature compensation - increases the idle speed at long stand-stills to cycle the water pump faster to cool the engine. Not present on all 2150's.

Throttle-actuated bowl vent valve - I guess you could consider this smog equipment in the sense that it keeps fuel vapor from reaching the atmosphere; it's part of the evaporative emissions system.

Relocated choke pulloff - two ways to do the same thing.
Reply With Quote
  #17 (permalink)  
Old 11-25-2009, 11:29 AM
dwrestle's Avatar
dwrestle dwrestle is offline
Elder User
 
Join Date: Sep 2005
Location: Brumley, MO
Posts: 637
dwrestle is starting off with a positive reputation.
I would think the 2bbl is a little more simple than a 4bbl. The Motorcraft 2bbl is freakin awesome some models approach 400 CFM, and I learned from old school AMC Jeep guys that they can run upside down for a little bit. The Motorcraft 2bbl is one of the best carbs ever made. I can see why people would want a 2bbl in place of a 4bbl when the only choices are Holley, Edelbrock, and factory spreadbore carbs. I personally went with a Q-Jet, but it's probably more work to install than a Motorcraft 2bbl.
__________________
95 F250 Supercab XLT 4x4, 460, E4OD, 3.55's maroon and grey two tone..

Old Ford Rides: 83 F150 4x4, 300 4bbl 4 Speed, 3.55's, black with red pinstripes . 06 F150 XLT, Supercab, 4x4, 5.4, 3.73's, Treador Red. 94 F150, XL, Supercab, 4x4, 351(with cam), 3.55's, Black.
Reply With Quote
  #18 (permalink)  
Old 11-25-2009, 11:11 PM
86sixbanger 86sixbanger is offline
Posting Guru
 
Join Date: Jun 2009
Posts: 1,174
86sixbanger is starting off with a positive reputation.
Aaahhh the Quadrajets.....I was told awhile back that such a carb might be a good one for me. Does anybody know the cfm ratings I should expect to have from a Q-jet say, off of a chebby 4.3 (they did put Q-Jets on those right?), or a 305, or maybe a 350?
Reply With Quote
  #19 (permalink)  
Old 11-26-2009, 08:47 AM
flipklos flipklos is offline
Posting Guru
 
Join Date: Sep 2007
Location: Wahpeton ND
Posts: 2,064
flipklos is gaining momentum as a positive member of FTE.
450-850 CFM
Reply With Quote
  #20 (permalink)  
Old 11-26-2009, 12:16 PM
86sixbanger 86sixbanger is offline
Posting Guru
 
Join Date: Jun 2009
Posts: 1,174
86sixbanger is starting off with a positive reputation.
Quote:
Originally Posted by flipklos View Post
450-850 CFM
What engines does the 450 cfm carb come off of? ....probably the 4.3 but any others???
Reply With Quote
  #21 (permalink)  
Old 11-26-2009, 12:37 PM
Harte3 Harte3 is offline
Postmaster
 
Join Date: Dec 2006
Location: Spokane, WA
Posts: 3,184
Harte3 is gaining momentum as a positive member of FTE.Harte3 is gaining momentum as a positive member of FTE.
Any QJ set up for small block engines up to 350 is fine. The overall cfm is mostly irrelevant since 95%+ running is going to be on the primaries and the secondaries should be adjusted to restrict opening at low engine speeds otherwise the bog monster rears it's ugly head.
__________________
1983 F150 300 I6, Comp Cam 260h and lifter kit, Port/Polished head, Offy DP Manifold, Holley 4160/1848-1 465 cfm, EFI Exhaust manifolds, Walker Y Pipe to 3-Way Cat, generic Turbo Muffler, Recurved DSII, Mallory HyFire 6a & ACCEL Super Stock Coil, Taylor Spiro Pro Wires, EFI plugs.
"It'll put out what ever it puts out." fordman75
Reply With Quote
  #22 (permalink)  
Old 11-26-2009, 05:37 PM
mountainrich mountainrich is offline
Freshman User
 
Join Date: Jan 2007
Posts: 36
mountainrich is starting off with a positive reputation.
You can make any quad good-as above mentioned. I had one on an old Buick 3.8L with the 4.1L 4-barrel intake. Had to rejet a bit- was jetted for a 307 Pontiac- and you REALLY have to tame the secondaries. Look for real lean secondary rods and leaner hangers and don't leave the spring adjustment loose. The 3.8L w/ a 350C turbo could average 26 mpg's hwy and had good bottom end. Some of the 2150's can be used on the 4.3L also. This is a good caburetor- esp. if the Quadrajet intimidates you.
Anyone w/ some carb background can do the 2150. For offroading, there's an extra spring on the float assembly which puts upwards pressure (a little) on the float so that the bowl stays about right. My ford 300 motor has a 2150 sideways on it. W/ the extra spring I've only been about 60 degrees w/ it w/o a sputter.
The quad, on my Dodge truck, also easily does this. Neither truck is for offroading though. These angles are from taking the kids to some remote swimming hole or collecting firewood.
Reply With Quote
  #23 (permalink)  
Old 12-06-2009, 03:40 PM
dreuter dreuter is offline
New User
 
Join Date: Oct 2009
Location: Indianapolis
Posts: 9
dreuter is starting off with a positive reputation.
Harte3 or anyone else with the knowledge, I have a question for you. Im new to carb'd engines and looking to get alittle more out of the 300. I found a quadrajet 4bbl with a 700cfm to go with my clifford intake. Is the 700 cfm to much?
Thanks for your help

Dan
Reply With Quote
  #24 (permalink)  
Old 12-07-2009, 12:09 AM
Harte3 Harte3 is offline
Postmaster
 
Join Date: Dec 2006
Location: Spokane, WA
Posts: 3,184
Harte3 is gaining momentum as a positive member of FTE.Harte3 is gaining momentum as a positive member of FTE.
Basically no...when properly adjusted. The only time it is too much is when opening the throttle like WOT and the secondaries are not properly adjusted...they open too soon and the bog monster appears. I myself like the spread bore concept. Small primaries for economy and driveability and the toilet-flusher secondaries for the Exxon contribution moments. Qjets appeared on smaller engines like V6's and sb V8's especially for marine applications so they do work on small cid engines like ours. If one can't find a Qjet in good shape at a reasonable price,
Holley currently makes a spread bore Qjet replacement...650 cfm with vacuum actuated secondaries that are adjustable with springs like any other Holley. IIRC the PN is 80555C and the model is either a 4165 or 4175. One of those models has mechanical actuated secondaries usually not recommended for the street but, IF (operative word is IF) one can educate their foot to the operation of the mechanical...like not too heavy too fast...it can work quite well too...IF...
__________________
1983 F150 300 I6, Comp Cam 260h and lifter kit, Port/Polished head, Offy DP Manifold, Holley 4160/1848-1 465 cfm, EFI Exhaust manifolds, Walker Y Pipe to 3-Way Cat, generic Turbo Muffler, Recurved DSII, Mallory HyFire 6a & ACCEL Super Stock Coil, Taylor Spiro Pro Wires, EFI plugs.
"It'll put out what ever it puts out." fordman75
Reply With Quote
  #25 (permalink)  
Old 12-07-2009, 08:49 PM
mountainrich mountainrich is offline
Freshman User
 
Join Date: Jan 2007
Posts: 36
mountainrich is starting off with a positive reputation.
Q-JET

As previously stated, the q-jet can be adjusted for about anything. I've personally used the Q-jet on an old Buick 3.8L motor and gotten good bottom end, respectable passing, and good fuel economy. You need to make sure the throttle shaft is bushed- or at least- not leaking. If it's after '74 or so, don't worry about the secondary wells. The secondaries will need to leaned (w/ rods AND hangers) but alot is done w/ an allen and tweeker.

Also, DO NOT use the phenolic float- brass ones are $8.00 and will not saturate with all the crap they're putting into gas as "experiments". If you are using the fuel pump off the engine, get a pressure regulator -$18.00 at Checkers, and put the pressure at 3. The rebuild specs for the float are a bit high. You should be able to set the float 2 or 3 16ths LOWER. Not knowing what altitude you're at, I cannot recommend a power spring.

If you've got the Quad, I'm really interested w/ how it acts on a 300. I intend to do the same thing this Spring. Seriously, PM me if you have questions of setting it up- they are easy once you can take the top cover and gasket on and off.
Reply With Quote
Old 12-07-2009, 08:49 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford Inline Six, 200, 250, 4.9L / 300

Tags
1bl, 240, 300, carb, carbs, carburetor, carburetors, carter, cid, f150, ford, fuel, leak, motor, rich, yfa

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 05:58 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup