750 CFM Edelbrok - Stock 302 - Vintage Mustang Forums
 10Likes
Reply
 
Thread Tools
post #1 of 24 (permalink) Old 08-08-2019, 07:53 PM Thread Starter
Member
 
ginpunk's Avatar
 
Join Date: Apr 2018
Location: Phoenix Arizona
Posts: 85
750 CFM Edelbrok - Stock 302

1965. Edelbrok 1407 sitting on top of the stocker 302.

Car runs fine as far as I know. Always looking to make changes and enjoy the ride and experience, so....

Thinking of going to a 500CFM, Summit M Series https://www.summitracing.com/parts/s...yABEgJb0vD_BwE or Autolite 4100 [if I can find one at a similar price to Summit].

It's not a race car, just fun around town.

Can't go wrong....right?
Grimbrand likes this.
ginpunk is offline  
Sponsored Links
Advertisement
 
post #2 of 24 (permalink) Old 08-08-2019, 07:59 PM
RV6
Senior Member
 
RV6's Avatar
 
Join Date: Nov 2014
Location: Pine, Colorado
Posts: 624
The 750 is to big. The summit is OK. I just installed the Summit 500 CFM on my 289 and am still tuning. Granted I live at 8500' so out of the box running is a farce.

Gary
Pine, CO
1967 Coupe, 289-4V, T-5
RV6 is offline  
post #3 of 24 (permalink) Old 08-08-2019, 08:14 PM
Senior Member
 
Ponyboy's Avatar
 
Join Date: Mar 2001
Location: Bothell, WA
Posts: 855
i run a 500 CFM Edelbrock on my 289 and it works great!
Rufus68 and Grimbrand like this.

66 coupe, '93 Fox seats, Three point belts, 289, Edelbrock, Weiand, JBA tri-y's, 2" duel exhaust (H-pipe), T5 trans(3.35), Pro 5.0 shifter, 3.40 open, KH front disc, Porterfield R4-S pads, 1" front sway bar, Shelby drop, Spring perch relocation, Shelby quick steer, GT progressive coils (1/2 coil cut), 4.5 leaf mid-eye, Bilstein street shocks, Export brace, Monti-Carlo bar, Sub-frame connectors, Performance alignment (+3.5 caster/-.5 camber), 16x7 wheels, 215/55/16 & 225/55/16 BFG G-force

Brad

Ponyboy is offline  
 
post #4 of 24 (permalink) Old 08-08-2019, 09:12 PM
Senior Member
 
jdub's Avatar
 
Join Date: Dec 2011
Location: Colorado
Posts: 4,597
If it's working why mess with it? I agree with the others that it's "too big" but usually people find out a carb is too big by having issues or tuning problems. If you're not having those, it seems like you should leave it alone.

That being said, I think the 500cfm Summit Carb is a decent choice. It has many of the features of the Autolite 4100 that people praise.
Mike the old grump likes this.

1965 Mustang
jdub is offline  
post #5 of 24 (permalink) Old 08-08-2019, 09:26 PM
Member
 
Join Date: Jul 2016
Location: NorCal
Posts: 63
750CFM seems too big for a stock 302...

I've heard very good things about the Summit carbs but have never used them...

I have a 1403 Eddy and like it. I really like how easy it is to tune. If I were buying a new carb today I'd try the 1903 Eddy which is an upgrade of the 1403 (500CFM with annular boosters)... no personal experience with it but it's got good reviews.
P-51 is offline  
post #6 of 24 (permalink) Old 08-08-2019, 09:31 PM
Senior Member
 
Grimbrand's Avatar
 
Join Date: Jan 2019
Location: Sedgwick, Kansas
Posts: 643
The Summit 500 will give you better mileage, throttle response, and depending on tune, maybe even better top end. For sure, better average power. It's also very easy to tune and keep running. It's a fantastic carburetor, and traces its lineage back to the 4100 Autolite.

"No matter what you are, be the best one you can." -Abraham Lincoln
Grimbrand is offline  
post #7 of 24 (permalink) Old 08-08-2019, 10:17 PM
Senior Member
 
Join Date: Sep 2012
Location: Fl
Posts: 1,740
My mid-50's self says that you should go with 450-600cfm on a stock sbf.


My late teens self ran a low rise offenhouser dual quad intake with 2-525cfm carters on a very hot 289. That was too much - but don't tell me that 40 years ago....
2nd 66 likes this.
66kcar is offline  
post #8 of 24 (permalink) Old 08-08-2019, 11:07 PM
Senior Member
 
mikeyhunts's Avatar
 
Join Date: Aug 2018
Location: HOUSTON
Posts: 953
Quote:
Originally Posted by 66kcar View Post

My late teens self ran a low rise offenhouser dual quad intake with 2-525cfm carters on a very hot 289. That was too much - but don't tell me that 40 years ago....

In teens on my first 289 mustang I ran two 660 centersquirters on a wild as I could make it tunnel ram and it ran like a scalded ape
Ha



Sent from my iPhone using Tapatalk
mikeyhunts is offline  
post #9 of 24 (permalink) Old 08-08-2019, 11:10 PM
Senior Member
 
Grimbrand's Avatar
 
Join Date: Jan 2019
Location: Sedgwick, Kansas
Posts: 643
If you have the hood clearance, it's pretty hard to beat a tunnel ram, even for street!

"No matter what you are, be the best one you can." -Abraham Lincoln
Grimbrand is offline  
post #10 of 24 (permalink) Old 08-08-2019, 11:15 PM
Senior Member
 
kenash's Avatar
 
Join Date: Dec 2006
Location: Severna Park, MD
Posts: 6,057
Garage
My 2 cents, take it or leave it....dump the 750 and go with a 500. Yeah, it might work, but there is no way it's working to it's full potential, not to mention, you are losing efficiency.
Who ever stuck that carb on a stock 302 didn't know what they were doing!
Redneckgearhead and Grimbrand like this.

KenA..
64 1/2 Poppy Red Cvt. Resto-Mod
333 Cu.in. T5z, 3:55, Dual 40 mm DCOE Webers
Performer RPM, CI cam, TFS/TWs, Tri-Ys, Discs w/Shelby Drums
Severna Park, Maryland
kenash is offline  
post #11 of 24 (permalink) Old 08-08-2019, 11:39 PM
Senior Member
 
josephqatarcarguy's Avatar
 
Join Date: Feb 2017
Location: Qatar
Posts: 340
650cfm edelbrock thunder AVS 2 carb .... best street carb I have ever used ...
josephqatarcarguy is offline  
post #12 of 24 (permalink) Old 08-09-2019, 12:25 AM
Senior Member
 
FrankieThe69Kid's Avatar
 
Join Date: Nov 2014
Location: Marshfield, MA, USA
Posts: 1,825
Stock 302's as far as the Ford Shop Manuals go had the Holley 4160, 600 CFM, 4bbl in the book. 750 is too big for that engine.

69 Convertible, 351W, T5, E-Brock Performer 351-W intake, Performer Plus cam, Holley 4160, power assist, dual exhaust, 4-wheel manual drums.
FrankieThe69Kid is offline  
post #13 of 24 (permalink) Old 08-09-2019, 09:01 AM
Senior Member
 
Join Date: Mar 2001
Location: Tunkhannock PA
Posts: 19,701
750 is way too large for a 302. However I believe Edelbrock uses the same size primary throttle plates and venture on all but the secondary size increases. I could be wrong on that but if true then the 750 running on just the primary should in theory run as well as a 500. maybe that's why the 750 is working? GM did the same thing with the Quadrajet, all had small primary and even a 5.0 would have a pretty healthy size carb. Since the secondaries are vacuum operated they're only going to open up as much as the engine needs. Still in all the 500 cfm would work better over all as the secondary size would work more efficiently in metering fuel

Tom

One thing great about getting older. A life in prison sentence is less of a deterrence

Huskinhano is offline  
post #14 of 24 (permalink) Old 08-09-2019, 09:55 AM
Senior Member
 
Woodchuck's Avatar
 
Join Date: Mar 2001
Location: Peoples Republic of Vermont
Posts: 32,941
Send a message via Yahoo to Woodchuck
Everybody says "carb is too big...". Well, the CFM rating provided is the MAXIMUM airflow that can be provided.

Rochester (GM) had just two common variations of the QuadraJet... a 750 cfm and an 800 cfm. While the 800 was reserved for trucks and some big-blocks, the 750 found its way on everything from the 230 cube Pontiac OHC six to 500 Caddy's.

Venturi size and shape has a lot to do with vacuum signal and as long as the carb can draw and emulsify fuel then discharge it at an appropriate rate (mixture) then what is the issue?
green1965 likes this.

Bart

What, me worry?
- Alfred E. Neuman

Woodchuck is online now  
post #15 of 24 (permalink) Old 08-09-2019, 10:43 AM
Senior Member
 
66coupe289's Avatar
 
Join Date: Sep 2001
Location: Milwaukee (Sussex), WI
Posts: 2,186
I have zero experience with Carter/Edelbrock carbs, but it looks like the primary venturi of the 1407 is smaller (1.44") than a Holley 600 (1.56"), so it makes sense that it run fine in low throttle situations.

Chris (Sussex, WI)

289 w/AFR 165, T-5z, 3.55T-loc, Granada Discs and 6 bolt Moto-Lita Steering Wheel
66coupe289 is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Vintage Mustang Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 Off

 
For the best viewing experience please update your browser to Google Chrome