302/347 with an Edelbrock 750 CFM Carb - Vintage Mustang Forums
 
Thread Tools
post #1 of 11 (permalink) Old 09-09-2003, 04:42 PM Thread Starter
Senior Member
 
Join Date: Aug 2001
Location: Portola Valley, CA 94028
Posts: 146
Hi Folks,

I have searched through the archives and have seen enough info that says that a 750 CFM carb on a 347 stroker that will max out at 6000 RPM is probably too much. However, I have a 347 that came with a 750 CFM carb. I am trying to find out if anyone is running a setup similar to this successfully. Here is an email I sent to Edelbrock to give you a little more background. I just sent it off and have not received a reply back yet:
------------------------------------------------------------
I just purchased a used motor with a lot of Edelbrock components on it. It is a Ford 302 stroked to a 347. It has Performer RPM heads, an RPM Ari-Gap intake, a Performer like cam (the Summit cam with the same numbers), and a 750 CFM Edelbrock carb with electric choke. The engine has low miles and the spark plugs (which were not long reach plugs and were partly shrouded) were really black with carbon. The pistons seemed to have a lot of carbon on them too, which I noticed when I was trying to find TDC for the engine.

My question is, is this carb too big for this engine? My application is a 1971 Ford Torino Convertible. This is a daily driver. I am not going to be getting over 6000 RPM. If the carb is not too big, do you have a setup/configuration for the carb that would be a good starting point for this engine. I am not sure if the carb is setup differently that it was out of the box. If this carb is just too big, which size Edelbrock carb do you recommend?
------------------------------------------------------------

Thanks!
Ted.

'65 Mustang Fastback
'71 Torino GT Convertible
'72 Fiat Spider (Sort of for sale)
TedFB is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 09-09-2003, 04:55 PM
Senior Member
 
abadtb2's Avatar
 
Join Date: Jun 2001
Location: SoCal
Posts: 5,368
My BOSS is a Stroked BOSS 302 to a 345. .020 over I run the stock 780cfm Holley with no problems. Even had to jet it up a bit from stock.
abadtb2 is offline  
post #3 of 11 (permalink) Old 09-09-2003, 05:06 PM
Senior Member
 
mikes69mach1's Avatar
 
Join Date: Dec 2002
Location: Susanville Ca
Posts: 1,598
It will probably be OK if the carb has vacuum secondaries.

69 Mach 1 351w .030 over, KB flat tops, 11.1 comp ,282 xtreme energy roller cam,offy 360 degree intake, Holley 750, 9" locker rear end with 3.89 gears, AFR 185 heads http://www.pixhost.com/pixm/mikesjun...ngpics0001.jpg
mikes69mach1 is offline  
post #4 of 11 (permalink) Old 09-09-2003, 05:13 PM
Senior Member
 
Join Date: Sep 2001
Location: Central Cali
Posts: 1,215
you'll be fine .. anything from 600cfm - 850cfm on a heavy breathing 302/347 can be modified to work well/right.

http://images.cardomain.com/member_i...57_98_full.jpg
1966 Mustang Coupe - "The Truth" Street/Strip Rod
Red w/ White Shelby stripes, 400HP 5.0, TKO, 9", 16" TTII's, 4whl discs, etc
1993 Taurus SHO - Beater
RaSMG is offline  
post #5 of 11 (permalink) Old 09-09-2003, 05:19 PM
Senior Member
 
gt350clone's Avatar
 
Join Date: Aug 2002
Location: KANSAS!
Posts: 5,196
The 750 is an OK size for that motor - just needs some tuning... perfect for a weekend warrior.

HOWEVER, since you plan to daily drive that in a relatively heavy Torino convertible, I'd switch to the Model 1406 600 cfm carb. Smaller venturis for better flow velocity, fuel atomization, and efficiency at the lower RPM's in which your motor will primarily be used.

http://www.sunflower.com/~luckybug/images/banner.jpg
Ye old 65 Clone - www.gt350clone.com (Car & Tech Pages)
The young stud - www.MySaleen.com
gt350clone is offline  
post #6 of 11 (permalink) Old 09-09-2003, 05:35 PM
Senior Member
 
Join Date: Feb 2002
Location: So. Cal.
Posts: 477
I had a holley 750 dp on my 347 originally and we could never get it to not run rich. I switched to a holley 650 dp and with just adjusting it (no modifying yet) it works perfectly.

My motor:
347 roller
cam .493/.510 279/289
Weiand Stealth
Trick Flow Twisted Wedge heads (no port/polish work doen yet)

Dyno with this setup 338.9 rwhp, 335.5 rwtq

347, Richmond 6 spd, CFDF, Hyd TOB, Currie 9" , susp mods, subs & twr brcs, 4 whl pwr disc, 17x8 TT II's.
338.9 rwhp 335.5 rwtq
http://home.earthlink.net/~gp2mff/pony/slbhood.jpg
gp001 is offline  
post #7 of 11 (permalink) Old 09-09-2003, 09:11 PM Thread Starter
Senior Member
 
Join Date: Aug 2001
Location: Portola Valley, CA 94028
Posts: 146
Hi Guys,

Thanks for all your input. I probably will not hear back from Edelbrock for a day or two, but I will post their response here too.

I think I will fish around a bit and see if I can find anyone who wants to buy it. I see there is one for sale for the same reason right now in the Engine and Drivetrain parts section! Maybe I will PM 71Mach351 and see how many takers he gets. Otherwise, I will at least use it to get the car going and see what happens.

Thanks,
Ted

'65 Mustang Fastback
'71 Torino GT Convertible
'72 Fiat Spider (Sort of for sale)
TedFB is offline  
post #8 of 11 (permalink) Old 09-09-2003, 11:32 PM
Senior Member
 
Join Date: Mar 2001
Location: Maryland
Posts: 1,656
The Fastback has a 750 on it (Super Victor intake) and it performs with no problems. However, it is geared low (4:11s), is a light car, and turns 6500+ rpms. It has run 12.8 @ 112mph in street trim with no special setups for the strip. The only problem is traction in 1st gear, resulting in fairly long 60' times.

http://userpages.umbc.edu/~lfrank1/trackeng1.jpg

66 Fastback Restomod (342 stroker, T5 12.8 @ 112 mph)
85 GT Hatchback
2008 Bullitt
BernieFrank is offline  
post #9 of 11 (permalink) Old 09-09-2003, 11:53 PM
Senior Member
 
Johnbear's Avatar
 
Join Date: Aug 2002
Location: santa clara CA
Posts: 2,365
I've heard that 750 edlebrocks for some reason are horrible POS go with something a little bit smaller or maybe something a different brand.
Johnbear is offline  
post #10 of 11 (permalink) Old 09-10-2003, 12:46 PM Thread Starter
Senior Member
 
Join Date: Aug 2001
Location: Portola Valley, CA 94028
Posts: 146
Can you point me to any links on the VMF about this. I am interested in what types of problems people have had.

Thanks,
Ted.

'65 Mustang Fastback
'71 Torino GT Convertible
'72 Fiat Spider (Sort of for sale)
TedFB is offline  
post #11 of 11 (permalink) Old 09-11-2003, 04:46 PM Thread Starter
Senior Member
 
Join Date: Aug 2001
Location: Portola Valley, CA 94028
Posts: 146
Here is the reponse I received from Edelbrock tech support:

------------------------------------------------------------
I assume you don't have an owner's manual, so I've attached one for your reference. You'll need Adobe Reader/ Acrobat to open the file. If you do not have this, you can download it for free from www.adobe.com

Please check the float levels. The needles and seats should also be clean. Make sure the fuel pressure is between 5 and 6 psi at the carb.

Start up the motor with a new set of plugs. After a few miles, pull the plugs -are they still sooty and black? If so, I can help recommend some jets and rods. Do you live at elevation?

------------------------------------------------------------

Hopefully I am going to start it up this weekend.

Ted.

'65 Mustang Fastback
'71 Torino GT Convertible
'72 Fiat Spider (Sort of for sale)
TedFB is offline  
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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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