383 or 400sb
Thread Starter
Junior Member
Joined: Jul 2002
Posts: 37
Likes: 0
From: edison,nj
383 or 400sb
do i go 383 or 400 small block--i have the 350 in it but i am not happy with it--i can't go crazy but i want at least 400hp either way with good gas mileage-16mpg--i have the 350 or i can a 400 for 250 with no intake---how hard to do a 400 swap?
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
What makes a 383 harder than a 350 is the required externally-balanced damper & flexplate) - unless you get an internally balanced crank.
What makes a 400 harder than a 350 is the required externally-balanced damper & flexplate - unless you have the crank internally balanced.
The one other slightly harder part of a 400 is finding a 400 block. If you already have a 350, then 383 rotating assemblies are relatively plentiful. If you already have a 400, no reason to sacrifice the extra cubes going to a 383.
Something tells me the cause of your dissatisfaction with the 350 isn't related to displacement or stroke.
What makes a 400 harder than a 350 is the required externally-balanced damper & flexplate - unless you have the crank internally balanced.
The one other slightly harder part of a 400 is finding a 400 block. If you already have a 350, then 383 rotating assemblies are relatively plentiful. If you already have a 400, no reason to sacrifice the extra cubes going to a 383.
Something tells me the cause of your dissatisfaction with the 350 isn't related to displacement or stroke.
Thread
Thread Starter
Forum
Replies
Last Post
LT1Formula
Engine/Drivetrain/Suspension Parts for Sale
7
Oct 8, 2015 08:34 PM