The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-28-2024, 02:14 PM   #1
Dead Parrot
Registered User
 
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,495
Re: Quadrajet 350SBC Tuning Advice

Q-Jets have a known problem. The casting plugs under the jets will leak. Enough to cause the gas to leak out while parked overnight. Most rebuild kits include a rubber pad that doesn't work very long. Common fix uses some variation of epoxy to seal the plugs. But most epoxies fail under constant exposure to gas. Another place they sometimes leak is the plug on the front of the carb by the filter housing. Even more difficult to seal as it is under pressure.

What ratio are the differentials? If you have an ' fuel economy' set, towing a heavy load like a skid steer + trailer will be slow. There is no magic tune that will change that.

Compression #'s being close to each other is good.

There should be 2 holes on the accel pump lever. If push rod on the outer one, try moving to the inner one. Should shoot a bit more gas when you mash the pedal.
Dead Parrot is offline   Reply With Quote
Reply

Bookmarks


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

Forum Jump


All times are GMT -4. The time now is 09:16 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com