fact or myth
Super Moderator
Joined: Apr 2004
Posts: 34,527
Likes: 2,830
Feedback carb? If so, it should compensate, methinks. Non-feedback? You might increase the airflow to the point of making a lean spot. It's not mythology, and you need to evaluate the facts after the install.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
Every engine will react to a modification differently. On some engines the EFI manifolds might actually increase airflow, on others they might only reduce pumping losses. Reducing pumping losses won't make it lean, increasing airflow may or may not.
Elder User
Joined: Sep 2003
Posts: 817
Likes: 1
I didn't have any problems. I did my '86 300 in stages and I started with the exhaust because of the Computer control of dizzy and carb. It was more work; but, I could do it as I could affort the new parts.
Uh! You may have a problem with no intake manifold heat - you may want to "rig" up a box around the front efi manifold to attach your carb by-pass air heater.
Uh! You may have a problem with no intake manifold heat - you may want to "rig" up a box around the front efi manifold to attach your carb by-pass air heater.
