Why did my GM 454 Backfire at WOT?
I replaced the in tank fuel pump last month thinking it was fuel starvation while going up hills at WOT (wide open throttle). The fuel pressure with the old pump was low showing around 8 psi on the pressure gage that I permanently mounted 3 inches from the throttle body on the pressure line.
How does the fuel pump work in a 454 engine?
It pumps fuel to the throttle body and the direct fuel injector system through the fuel supply line and then through an in-line fuel filter. The pump is designed to provide pressurized fuel at 125 kPa (18psi.) A pressure regulator in the TBI keeps fuel available to the injectors at a constant pressure between 62 and 90 kpa. (9 to 13psi.)
What kind of fuel system did the 1980 Chevy 454 use?
A M4MC or EM4MC carburetor was used on most of the 1980 series engines. This is an aspirated fuel delivery system with the addition of a mixture control system controlled by the ECM.
How old is a Chevy 454 V-8 engine?
To find out just how much the 30-year-old behemoth could muster, they took it to Westech Performance’s dyno room. Of course, the guys wanted to see what the old iron block had in her, so they ran a baseline test. They left all the original parts in place like the two-barrel carburetor and dilapidated ignition system.
To find out just how much the 30-year-old behemoth could muster, they took it to Westech Performance’s dyno room. Of course, the guys wanted to see what the old iron block had in her, so they ran a baseline test. They left all the original parts in place like the two-barrel carburetor and dilapidated ignition system.
What kind of gas mileage does a Chevy 454 get?
The 454 is a big-block carbureted engine found in most older model Chevrolet cars and trucks. The engine uses eight cylinders to provide high-end torque and speeds. The combination of larger bore and eight cylinders equates to very poor gas mileage. The engine runs an average of 10 to 15 mpg.
Can a 454 be used as a diesel?
While you are correct the 454 won’t have the torque of a diesel, it sounds like Dave and Bea have a problem. We had a 91 Pace with the 454, and we could still do 45MPH over the Tehachapi pass in California–a pretty steep, long hill. Sounds to me the engine just needs a good tune-up as suggested by the other posters.
How to add more power to a Chevy 454?
The old cast-iron cylinder heads and low-rise intake manifold were dumped in favor of some aluminum PowerOval 280 heads from Trick-Flow with upgraded valvetrain and a Summit single-plane intake manifold. The old camshaft came out, too, with a meatier hydraulic bump stick with 0.600 inches of lift taking its place.
