0
They did not make a 400 sb Chevy in 1974. But from 1975 to 1980 they did and the answer to your question is 8.5:1 from 1975 to 1977 Then from 1977 to 1980 it was 8.3:1 ratio. That is Advertised compression ratio.
I may stand corrected on the date when I said they did not make a 400SB. But The info. I gave you was all I could find. NEUTZ.
Still curious? Ask our experts.
Chat with our AI personalities
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
JudySimplicity is my specialty.
Chat with Judy
RafaThere's no fun in playing it safe. Why not try something a little unhinged?
Chat with RafaAdd your answer:
Earn +20 ptsQ: What is the compression ratio on a 1974 Chevy 400 engine?
Write your answer...
Submit
Still have questions?
Trending Questions
Do I need to have a certain class on my license to drive a regular dump truck?
Where is Korum Automotive Group located?
Where is the cabin air filter on a 2012 Buick enclave?
Drivers should scan 10 12 seconds down the road looking of potential hazards?
Will coil break down when engine gets hot?
Is a CDL required to own and drive an old military 6X6 truck?
What is someone called who covers car seats and chesterfields?
What weighs 2000 lbs?
Why no shifting in 1997 gmc t6 transmission when check engine light is on?
How big is a 1969 vw bug fuel tank?
Do all states have financial responsibility laws?
How do you jump start a lorry?
How many people can brake their arm a day?
Why does my Rear window on SUV pops open when driving?
What vehicle will a 5 by115 bolt pattern fit?
Can car insurance companies not repair your car if you forgot to add something on the insurance?
What is gas oil mixture for 31cc Yardman?
What city did The United automobile workers was officially recognized by General Motors after a sit down strike take place?
Will a turbo 400 fit in a k1500?
What oil to a 350 small block?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.