Q: Holley 570 CFM for 454 engine

asked by on

Hi I changed my 350 engine (1978 k5 blazer) with 454 Chevy Gen v and everything in this engine is stock. now I have a new Holley Performance 0-83570 Street Avenger Carburetor with 570 cfm. is it suitable Carb for 454 engine or I have to change it? thanks

My car has 100 miles.
My car has an automatic transmission.

Going from a 350 to a 454 engine may require you to have the carburetor rebuilt to install larger main jets to get the engine to run good and have good power. A 650 carburetor would better suit the 454 and may even need bigger if the 454 has had performance modifications. I would see how the engine runs with the 570 cfm carb as is first and you may find it will run the 454 just fine and nothing needs to be done. If you get hesitations and low power then it will need the larger jets or bigger carb.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Holley 570 CFM for 454 engine

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What could be cause of coolant leak after replacing cap and low fan relay? 2012 Chevrolet Cruze

Coolant leaks can originate from a few different places. A pressure check of the cooling system can be performed, subjecting the entire system to higher-than-normal pressures under controlled circumstances to find weak points. Leaks could be coming from hoses, hose...

Q: Not getting enough fuel car will not run right. It stalls when you give it gas and stalls when it's running. It's a 1984 Ford Escort.

Hi there, thanks for writing in. Several early 80's Ford's swapped from carburetor to fuel injected engines; including your '84 Ford Escort. However, there were two different fuel systems available that year. If your Escort has the fuel injected engine,...

Q: Overheating way to fast

Hello. If the engine overheats this fast then you should do a block test. This sounds like a blown head gasket or a cracked head. When this occurs combustion pressure enters the cooling system and causes this to occur. I...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.