Thirsty Pony - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 06-20-04, 11:27 AM Thread Starter
Registered User
 
Join Date: Oct 2003
Location: Washington State
Age: 62
Posts: 25
roll Thirsty Pony

I am trying to determine why I am getting only 9 to 10 mpg fuel economy and whether I should install a Holley 750 cfm double-pumper carburetor on my 5.0L Mustang.

Here's the background:

I installed a B&M 144 supercharger several years ago with a Competition 268H-10 cam/hydraulic lifters.
Gross Valve Lift .456 Intake .456 Exhaust
Duration at 0.050 tappet lift 218 Intake 218 Exhaust
Duration at 0.006 tappet lift 268 Intake 268 Exhaust
Lobe Separation 110
With stock heads, Cyclone AR-1 headers, and a Holley 600 cfm vacuum secondary & #68 orifices, I was typically getting between 16 and 19 mpg.

This past fall, I rebuilt the engine and bored the cylinders 0.030 over. I replaced the #68 orifices in the Holley with #72's. I also replaced the camshaft with a Competition XE262H-10 cam, springs, and lifters.
Gross Valve Lift .493 Intake .500 Exhaust
Duration at 0.050 tappet lift 218 Intake 224 Exhaust
Duration at 0.006 tappet lift 262 Intake 270 Exhaust
Lobe Separation 110

I WANT 16 to 19 mpg again. My son has given me a Holley 750 cfm carburetor for Father's Day. There was fear that the vacuum secondary would cause my air/fuel ratio to go lean during acceleration with the blower. Is the 750 too big? Will it further hurt my fuel economy? Is the Holley 600 not working correctly?

82 Boss is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 06-20-04, 01:08 PM
Registered User
 
northiam's Avatar
 
Join Date: Feb 2004
Location: Victoria. Australia
Posts: 381
Re: Thirsty Pony

It looks like you have a windsor engine, best ask at the windsor forum
northiam is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
USA:Ford, Mustang devotees celebrate pony car's 40th Stacy94PGT Ford Worldwide News 0 05-21-04 03:53 AM
USA:Plastics pony up for Ford; innovations cut Mustang's cost, not character Stacy94PGT Ford Worldwide News 0 05-19-04 07:01 AM
Thirsty 5.0 ED GLI V8 Windsor Tech 48 04-30-04 11:20 PM
AU:The pony expresses Stacy94PGT Ford Worldwide News 2 04-13-04 10:01 PM
Our Pony Car.... XR_Strider_GuY The Pub 25 06-07-01 08:34 PM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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