1977 CJ7 304 v8 carb issue - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > 1977 CJ7 304 v8 carb issue

Dan's Old as Dirt Birthday Sale!Premium LED Lighting by VISION X, Proudly sold at ROCKRIDGGEARSHADE Pocket Tops in stock and available at ROCKRIDGE

Reply
Unread 07-11-2013, 09:40 AM   #1
campdog333
Registered User
1977 CJ7 
 
Join Date: Jul 2013
Location: Gibraltar, MI
Posts: 4
1977 CJ7 304 v8 carb issue

I have a HLY-122-57 4bbl carb with number 57 jets putting out 470 cfm. My 304 v8 recommended carb is a 2bbl, 287 cfm.
Can I make the 4bbl carb work if I change the jets? Being a 4bbl, would I need to reduce to a lower cfm jet or keep it around the same cfm? Lastly what size jets would I need to achieve the 287 cfm in the HLY-122-57 4bbl?

campdog333 is offline   Reply With Quote
Unread 07-12-2013, 05:06 AM   #2
jeepdaddy2000
Web Wheeler
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 6,117
Changing the jets won't change the CFM.
Gaining CFM is why most people upgrade their carbs.
You will need a 4 bbl manifold and install the carb.
jeepdaddy2000 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.