Carb swap- CFM?
09-28-2021, 06:52 AM
#1
Mopar Fan
Thread Starter
Carb swap- CFM?
Hello!
I'm looking to swap the Carter 2bbl on my 318 to a Holley 4bbl with electric choke and vacuum secondaries. What is a good CFM rating to buy for my 318 engine?
Side note- What do you folks think the redline on my '78 318 would be? The aftermarket tach has a redline at 3,000, but that seems ridiculously low to me. Any idea where the ceiling actually is?
I'm looking to swap the Carter 2bbl on my 318 to a Holley 4bbl with electric choke and vacuum secondaries. What is a good CFM rating to buy for my 318 engine?
Side note- What do you folks think the redline on my '78 318 would be? The aftermarket tach has a redline at 3,000, but that seems ridiculously low to me. Any idea where the ceiling actually is?
09-28-2021, 09:16 AM
#2
Mopar Lover
RS -
Assume bone stock, 450 to 600 cfm and 600 might be a stretch.
Again, assuming bone stock and not recently rebuilt, I'd be edgy about going passed 5000.
Still you'd need a dyno to find out for sure, since components wear and early valve float is more probable.
Archer
Assume bone stock, 450 to 600 cfm and 600 might be a stretch.
Again, assuming bone stock and not recently rebuilt, I'd be edgy about going passed 5000.
Still you'd need a dyno to find out for sure, since components wear and early valve float is more probable.
Archer
09-28-2021, 10:02 AM
#3
Super Moderator
A 600 vacuum secondary will work great and everything will be done by 5000 rpm...
The following users liked this post:
Lostviking (09-29-2021)
Thread
Thread Starter
Forum
Replies
Last Post
